Do you need to know, when is the best time to go to Brazil? Then you should take a look here, what weather you can expect there during the year.
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.
As Brazil has a really huge area, the information below relate mostly only to the area around the capital of this country. To see information about other places, please, choose one of these areas: Central West, North, Northeast, South, Southeast.
Let's look now what weather you can expect in the area around the capital and in many other cities. The warmest month here is September, the average maximum temperature is 28.1 ℃ (82.58 ℉). The average minimum temperature in this month is 16.1 ℃ (60.98 ℉). The coldest month here is July, the average maximum temperature is 25.3 ℃ (77.54 ℉). The average minimum temperature in this month is 13.4 ℃ (56.12 ℉). The most rainy month here is December, the average number of rainy days is 20.3. The least rainy month here is June, the average number of rainy days is 3. 
When travelling to some places in Brazil, always consider the altitude of the the place as well. The highest point here 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 Brazil in January is this: The average highest temperature in Brazil in January is 26.6 ℃ (79.88 ℉). The average lowest temperature is 17.5 ℃ (63.5 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 26.75 ℃ (80.15 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 26.9 ℃ (80.42 ℉). The average number of rainy days in January is 18.8. The average rainfall is 238.7 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 13:02 (hours and minutes), in the middle of the month 12:57 and at the end of the month 12:48.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 Brazil in February is this: The average highest temperature in Brazil in February is 27.2 ℃ (80.96 ℉). The average lowest temperature is 17.9 ℃ (64.22 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 26.9 ℃ (80.42 ℉). At the end of February you can expect lower temperatures, the average highest temperature is around 27.15 ℃ (80.87 ℉). The average number of rainy days in February is 15.7. The average rainfall is 217.5 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 12:48 (hours and minutes), in the middle of the month 12:36 and at the end of the month 12:24.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 Brazil in March is this: The average highest temperature in Brazil in March is 27.1 ℃ (80.78 ℉). The average lowest temperature is 17.8 ℃ (64.04 ℉). At the beginning of March you can expect higher temperatures, the average highest temperature is around 27.15 ℃ (80.87 ℉). At the end of March you can expect lower temperatures, the average highest temperature is around 26.85 ℃ (80.33 ℉). The average number of rainy days in March is 15.6. The average rainfall is 188.6 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 12:24 (hours and minutes), in the middle of the month 12:10 and at the end of the month 11:57.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 Brazil in April is this: The average highest temperature in Brazil in April is 26.6 ℃ (79.88 ℉). The average lowest temperature is 17 ℃ (62.6 ℉). At the beginning of April you can expect higher temperatures, the average highest temperature is around 26.85 ℃ (80.33 ℉). At the end of April you can expect lower temperatures, the average highest temperature is around 26.05 ℃ (78.89 ℉). The average number of rainy days in April is 8.9. The average rainfall is 123.7 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 11:57 (hours and minutes), in the middle of the month 11:44 and at the end of the month 11:32.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 Brazil in May is this: The average highest temperature in Brazil in May is 25.5 ℃ (77.9 ℉). The average lowest temperature is 15.1 ℃ (59.18 ℉). At the beginning of May you can expect higher temperatures, the average highest temperature is around 26.05 ℃ (78.89 ℉). At the end of May you can expect lower temperatures, the average highest temperature is around 25.5 ℃ (77.9 ℉). The average number of rainy days in May is 4.9. The average rainfall is 39.3 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 11:32 (hours and minutes), in the middle of the month 11:22 and at the end of the month 11:15.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 Brazil in June is this: The average highest temperature in Brazil in June is 25.5 ℃ (77.9 ℉). The average lowest temperature is 13.5 ℃ (56.3 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 25.5 ℃ (77.9 ℉). At the end of June you can expect lower temperatures, the average highest temperature is around 25.4 ℃ (77.72 ℉). The average number of rainy days in June is 3. The average rainfall is 8.8 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 11:15 (hours and minutes), in the middle of the month 11:11 and at the end of the month 11:11.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 Brazil in July is this: The average highest temperature in Brazil in July is 25.3 ℃ (77.54 ℉). The average lowest temperature is 13.4 ℃ (56.12 ℉). At the beginning of July you can expect higher temperatures, the average highest temperature is around 25.4 ℃ (77.72 ℉). At the end of July you can expect higher temperatures, the average highest temperature is around 26.3 ℃ (79.34 ℉). The average number of rainy days in July is 3. The average rainfall is 12 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 11:11 (hours and minutes), in the middle of the month 11:15 and at the end of the month 11:23.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 Brazil in August is this: The average highest temperature in Brazil in August is 27.3 ℃ (81.14 ℉). The average lowest temperature is 14.6 ℃ (58.28 ℉). At the beginning of August you can expect lower temperatures, the average highest temperature is around 26.3 ℃ (79.34 ℉). At the end of August you can expect higher temperatures, the average highest temperature is around 27.7 ℃ (81.86 ℉). The average number of rainy days in August is 4. The average rainfall is 12.8 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 11:23 (hours and minutes), in the middle of the month 11:33 and at the end of the month 11:44.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 Brazil in September is this: The average highest temperature in Brazil in September is 28.1 ℃ (82.58 ℉). The average lowest temperature is 16.1 ℃ (60.98 ℉). At the beginning of September you can expect lower temperatures, the average highest temperature is around 27.7 ℃ (81.86 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 28 ℃ (82.4 ℉). The average number of rainy days in September is 6.1. The average rainfall is 52.2 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 11:44 (hours and minutes), in the middle of the month 11:57 and at the end of the month 12:10.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 Brazil in October is this: The average highest temperature in Brazil in October is 27.9 ℃ (82.22 ℉). The average lowest temperature is 17.6 ℃ (63.68 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 28 ℃ (82.4 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 27.2 ℃ (80.96 ℉). The average number of rainy days in October is 13.7. The average rainfall is 175.5 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 12:10 (hours and minutes), in the middle of the month 12:23 and at the end of the month 12:36.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 Brazil in November is this: The average highest temperature in Brazil in November is 26.5 ℃ (79.7 ℉). The average lowest temperature is 17.5 ℃ (63.5 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 27.2 ℃ (80.96 ℉). At the end of November you can expect higher temperatures, the average highest temperature is around 26.7 ℃ (80.06 ℉). The average number of rainy days in November is 18. The average rainfall is 238 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 12:36 (hours and minutes), in the middle of the month 12:48 and at the end of the month 12:57.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 Brazil in December is this: The average highest temperature in Brazil in December is 26.9 ℃ (80.42 ℉). The average lowest temperature is 18 ℃ (64.4 ℉). At the beginning of December you can expect lower temperatures, the average highest temperature is around 26.7 ℃ (80.06 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 26.75 ℃ (80.15 ℉). The average number of rainy days in December is 20.3. The average rainfall is 245 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 12:57 (hours and minutes), in the middle of the month 13:02 and at the end of the month 13:03.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.