Do you need to know, when is the best time to go to South? Then you should take a look here, what weather you can expect there during the year.
South is part of Brazil. Brazil is a huge country, so the climate is varied here. Mostly the climate is tropical, but temperate in south. Near the equator the weather doesn't change much during the year, but winters are sometimes cold in the south. And in the mountainous it snows. Most of Brazil has only moderate rainfall, but the Amazon region is humid.
When speaking about the usual weather in this area, the information is relevant for example for these popular places: Antonina, Araranguá, Arroio Grande, Bagé, Balneário Camboriú, Balneário Piçarras, Barra Velha, Barra do Ribeiro, Bento Gonçalves, Biguaçu, Blumenau, Bombinhas, Cacequi, Camaquã, Campina Grande do Sul, Campo Largo, Campos Gerais do Paraná, Candelária, Canela, Canoas, Canoinhas, Capitão Leonidas Marques, Cascavel, Caxias do Sul, Central East, Central West, Central and South Central, Chapecó, Chuí, Coast, Colombo, Correia Pinto, Criciúma, Curitiba, Curitibanos, Erechim, Fazenda Rio Grande, Florianopolis, Foz do Iguaçu, Francisco Beltrão, Garopaba, Garuva, Gramado, Grande Curitiba, Grande Florianópolis, Grande Porto Alegre, Guarapuava, Guaraqueçaba, Guaratuba, Guaíba, Guaíra, Iguaçu Valleys, Ilha do Mel, Imbituba, Irati, Itaiópolis, Itajaí, Itajaí Valley, Itapema, Jaguarão, Joinville, Lages, Londrina, Mafra, Mandirituba, Maquiné, Maringá, Marumbi, Mata, Matinhos, Morretes, Mostardas, Muçum, Northeast, Northwest, Nova Petrópolis, Novo Hamburgo, Osório, Palhoça, Palmares do Sul, Paranaguá, Paraná, Passo Fundo, Pelotas, Penha, Pinhais, Ponta Grossa, Pontal do Paraná, Porto Alegre, Prudentópolis, Quatro Barras, Quitandinha, Rio Grande, Rio Grande do Sul, Sananduva, Santa Catarina, Santa Cecília, Santa Cruz do Sul, Santa Maria, Santana do Livramento, Santo Ângelo, Sapucaia do Sul, Serra do Itajaí National Park, Serrana, Sombrio, Southeast, Southwest, São Francisco do Sul, São José, São José do Norte, São Leopoldo, São Lourenço do Sul, São Marcos, São Miguel das Missões, São Miguel do Oeste, São Pedro do Sul, São Vicente do Sul, Tijucas, Torres, Treze Tílias, Tubarão, Uruguaiana, Vacaria.
Let's look now what weather you can expect in the area around Porto Alegre and in many other cities. The warmest month here is January, the average maximum temperature is 30.5 ℃ (86.9 ℉). The average minimum temperature in this month is 20.9 ℃ (69.62 ℉). The coldest month here is June, the average maximum temperature is 19.1 ℃ (66.38 ℉). The average minimum temperature in this month is 10.7 ℃ (51.26 ℉). The most rainy month here is June, the average number of rainy days is 12.2. The least rainy month here is April, the average number of rainy days is 8.9. 
When travelling around South, always consider the altitude of the the place as well. We should remind you, that the highest point in Brazil is Pico da Neblina (2994 m) and the lowest point is Atlantic Ocean (0 m). So there are quite big differences in altitudes in this country, so you can expect the weather to be different in different altitudes as well. Keep in mind, that the temperature usually decreases by 1.2 - 1.9 ℃ (2.2 - 3.5 ℉) per 200 m (656 ft), depending on the other conditions. (And we should add, that in the very special condition named thermal inversion even the temperature may be higher in higher altitudes.)
Typical (usual) weather in South in January is this: The average highest temperature in South in January is 30.5 ℃ (86.9 ℉). The average lowest temperature is 20.9 ℃ (69.62 ℉). At the beginning of January you can expect lower temperatures, the average highest temperature is around 29.8 ℃ (85.64 ℉). At the end of January you can expect lower temperatures, the average highest temperature is around 30.4 ℃ (86.72 ℉). The average number of rainy days in January is 11.2. The average rainfall is 98.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 14:02 (hours and minutes), in the middle of the month 13:51 and at the end of the month 13:32.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in South in February is this: The average highest temperature in South in February is 30.3 ℃ (86.54 ℉). The average lowest temperature is 20.7 ℃ (69.26 ℉). At the beginning of February you can expect higher temperatures, the average highest temperature is around 30.4 ℃ (86.72 ℉). At the end of February you can expect lower temperatures, the average highest temperature is around 29.2 ℃ (84.56 ℉). The average number of rainy days in February is 9.9. The average rainfall is 109.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:32 (hours and minutes), in the middle of the month 13:09 and at the end of the month 12:42.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in South in March is this: The average highest temperature in South in March is 28.1 ℃ (82.58 ℉). The average lowest temperature is 19.4 ℃ (66.92 ℉). At the beginning of March you can expect higher temperatures, the average highest temperature is around 29.2 ℃ (84.56 ℉). At the end of March you can expect lower temperatures, the average highest temperature is around 26.7 ℃ (80.06 ℉). The average number of rainy days in March is 11. The average rainfall is 105.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:42 (hours and minutes), in the middle of the month 12:15 and at the end of the month 11:48.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in South in April is this: The average highest temperature in South in April is 25.3 ℃ (77.54 ℉). The average lowest temperature is 16.3 ℃ (61.34 ℉). At the beginning of April you can expect higher temperatures, the average highest temperature is around 26.7 ℃ (80.06 ℉). At the end of April you can expect lower temperatures, the average highest temperature is around 23.9 ℃ (75.02 ℉). The average number of rainy days in April is 8.9. The average rainfall is 87 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:48 (hours and minutes), in the middle of the month 11:21 and at the end of the month 10:57.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in South in May is this: The average highest temperature in South in May is 22.5 ℃ (72.5 ℉). The average lowest temperature is 13.3 ℃ (55.94 ℉). At the beginning of May you can expect higher temperatures, the average highest temperature is around 23.9 ℃ (75.02 ℉). At the end of May you can expect lower temperatures, the average highest temperature is around 20.8 ℃ (69.44 ℉). The average number of rainy days in May is 9.8. The average rainfall is 95.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:57 (hours and minutes), in the middle of the month 10:36 and at the end of the month 10:21.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in South in June is this: The average highest temperature in South in June is 19.1 ℃ (66.38 ℉). The average lowest temperature is 10.7 ℃ (51.26 ℉). At the beginning of June you can expect higher temperatures, the average highest temperature is around 20.8 ℃ (69.44 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 19.3 ℃ (66.74 ℉). The average number of rainy days in June is 12.2. The average rainfall is 130.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:21 (hours and minutes), in the middle of the month 10:13 and at the end of the month 10:13.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in South in July is this: The average highest temperature in South in July is 19.5 ℃ (67.1 ℉). The average lowest temperature is 10.7 ℃ (51.26 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 19.3 ℃ (66.74 ℉). At the end of July you can expect higher temperatures, the average highest temperature is around 20.1 ℃ (68.18 ℉). The average number of rainy days in July is 12. The average rainfall is 121.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:13 (hours and minutes), in the middle of the month 10:22 and at the end of the month 10:37.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in South in August is this: The average highest temperature in South in August is 20.7 ℃ (69.26 ℉). The average lowest temperature is 11.7 ℃ (53.06 ℉). At the beginning of August you can expect lower temperatures, the average highest temperature is around 20.1 ℃ (68.18 ℉). At the end of August you can expect higher temperatures, the average highest temperature is around 21.5 ℃ (70.7 ℉). The average number of rainy days in August is 11. The average rainfall is 138.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:37 (hours and minutes), in the middle of the month 10:58 and at the end of the month 11:22.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in South in September is this: The average highest temperature in South in September is 22.3 ℃ (72.14 ℉). The average lowest temperature is 13.2 ℃ (55.76 ℉). At the beginning of September you can expect lower temperatures, the average highest temperature is around 21.5 ℃ (70.7 ℉). At the end of September you can expect higher temperatures, the average highest temperature is around 23.65 ℃ (74.57 ℉). The average number of rainy days in September is 10.9. The average rainfall is 142.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:22 (hours and minutes), in the middle of the month 11:48 and at the end of the month 12:15.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in South in October is this: The average highest temperature in South in October is 25 ℃ (77 ℉). The average lowest temperature is 15.5 ℃ (59.9 ℉). At the beginning of October you can expect lower temperatures, the average highest temperature is around 23.65 ℃ (74.57 ℉). At the end of October you can expect higher temperatures, the average highest temperature is around 25.65 ℃ (78.17 ℉). The average number of rainy days in October is 9.8. The average rainfall is 112.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:15 (hours and minutes), in the middle of the month 12:42 and at the end of the month 13:08.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in South in November is this: The average highest temperature in South in November is 26.3 ℃ (79.34 ℉). The average lowest temperature is 17.6 ℃ (63.68 ℉). At the beginning of November you can expect lower temperatures, the average highest temperature is around 25.65 ℃ (78.17 ℉). At the end of November you can expect higher temperatures, the average highest temperature is around 27.7 ℃ (81.86 ℉). The average number of rainy days in November is 10.1. The average rainfall is 103.8 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:08 (hours and minutes), in the middle of the month 13:32 and at the end of the month 13:50.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in South in December is this: The average highest temperature in South in December is 29.1 ℃ (84.38 ℉). The average lowest temperature is 18.9 ℃ (66.02 ℉). At the beginning of December you can expect lower temperatures, the average highest temperature is around 27.7 ℃ (81.86 ℉). At the end of December you can expect higher temperatures, the average highest temperature is around 29.8 ℃ (85.64 ℉). The average number of rainy days in December is 10.1. The average rainfall is 101.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:50 (hours and minutes), in the middle of the month 14:02 and at the end of the month 14:04.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.| Curitiba | temperature: - | highest temperature: 26 ℃ (78.8 ℉) | lowest temperature: 15.7 ℃ (60.26 ℉) | rainfall: 149mm | rainy days: 16.2 |
| Florianopolis | temperature: - | highest temperature: 26.7 ℃ (80.06 ℉) | lowest temperature: 20.5 ℃ (68.9 ℉) | rainfall: 148.7mm | rainy days: 14.7 |
| Porto Alegre | temperature: - | highest temperature: 29.1 ℃ (84.38 ℉) | lowest temperature: 18.9 ℃ (66.02 ℉) | rainfall: 101.1mm | rainy days: 10.1 |