Do you need to know, when is the best time to go to Italy? Then you should take a look here, what weather you can expect there during the year.
The climate of Italy is very varied, but it is mostly Mediterranean. In the far north the climate is alpine, in south you can expect hot and dry weather. You can expect clearly noticeable difference in temperature between the north and south, in winter the difference can be even 20 grades Celsius (36 grades Fahrenheit).
As Italy 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 Italy, Northeast Italy, Northwest Italy, Sardinia, Sicily, Southern Italy.
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 July, the average maximum temperature is 30.8 ℃ (87.44 ℉). The average minimum temperature in this month is 18.5 ℃ (65.3 ℉). The coldest month here is January, the average maximum temperature is 12.1 ℃ (53.78 ℉). The average minimum temperature in this month is 3.3 ℃ (37.94 ℉). The most rainy month here is November, the average number of rainy days is 9.7. The least rainy month here is July, the average number of rainy days is 2. 
When travelling to some places in Italy, always consider the altitude of the the place as well. The highest point here is Mont Blanc (Monte Bianco) de Courmayeur (4748 m) and the lowest point is Mediterranean Sea (0 m). So there are huge differences in altitudes in this country and the weather is very different in them therefore. 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 Italy in January is this: The average highest temperature in Italy in January is 12.1 ℃ (53.78 ℉). The average lowest temperature is 3.3 ℃ (37.94 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 12.35 ℃ (54.23 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 12.7 ℃ (54.86 ℉). The average number of rainy days in January is 7.1. The average rainfall is 66.8 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 9:10 (hours and minutes), in the middle of the month 9:27 and at the end of the month 9:57.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 Italy in February is this: The average highest temperature in Italy in February is 13.3 ℃ (55.94 ℉). The average lowest temperature is 3.8 ℃ (38.84 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 12.7 ℃ (54.86 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 14.45 ℃ (58.01 ℉). The average number of rainy days in February is 7.6. The average rainfall is 73.4 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 9:57 (hours and minutes), in the middle of the month 10:33 and at the end of the month 11:14.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 Italy in March is this: The average highest temperature in Italy in March is 15.6 ℃ (60.08 ℉). The average lowest temperature is 5.3 ℃ (41.54 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 14.45 ℃ (58.01 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 16.6 ℃ (61.88 ℉). The average number of rainy days in March is 7.5. The average rainfall is 56.7 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 11:14 (hours and minutes), in the middle of the month 11:56 and at the end of the month 12:39.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 Italy in April is this: The average highest temperature in Italy in April is 17.6 ℃ (63.68 ℉). The average lowest temperature is 7.5 ℃ (45.5 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 16.6 ℃ (61.88 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 20.2 ℃ (68.36 ℉). The average number of rainy days in April is 9.3. The average rainfall is 79.2 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 12:39 (hours and minutes), in the middle of the month 13:20 and at the end of the month 13:59.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 Italy in May is this: The average highest temperature in Italy in May is 22.8 ℃ (73.04 ℉). The average lowest temperature is 11.8 ℃ (53.24 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 20.2 ℃ (68.36 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 24.9 ℃ (76.82 ℉). The average number of rainy days in May is 6.3. The average rainfall is 52 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 13:59 (hours and minutes), in the middle of the month 14:33 and at the end of the month 14:59.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 Italy in June is this: The average highest temperature in Italy in June is 27 ℃ (80.6 ℉). The average lowest temperature is 15.7 ℃ (60.26 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 24.9 ℃ (76.82 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 28.9 ℃ (84.02 ℉). The average number of rainy days in June is 4.3. The average rainfall is 33.9 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 14:59 (hours and minutes), in the middle of the month 15:12 and at the end of the month 15:12.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 Italy in July is this: The average highest temperature in Italy in July is 30.8 ℃ (87.44 ℉). The average lowest temperature is 18.5 ℃ (65.3 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 28.9 ℃ (84.02 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 30.6 ℃ (87.08 ℉). The average number of rainy days in July is 2. The average rainfall is 19.5 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 15:12 (hours and minutes), in the middle of the month 14:57 and at the end of the month 14:31.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 Italy in August is this: The average highest temperature in Italy in August is 30.4 ℃ (86.72 ℉). The average lowest temperature is 18.4 ℃ (65.12 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 30.6 ℃ (87.08 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 28.25 ℃ (82.85 ℉). The average number of rainy days in August is 3.3. The average rainfall is 36.4 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 14:31 (hours and minutes), in the middle of the month 13:58 and at the end of the month 13:19.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 Italy in September is this: The average highest temperature in Italy in September is 26.1 ℃ (78.98 ℉). The average lowest temperature is 15.2 ℃ (59.36 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 28.25 ℃ (82.85 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 23.6 ℃ (74.48 ℉). The average number of rainy days in September is 6.2. The average rainfall is 72.5 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 13:19 (hours and minutes), in the middle of the month 12:38 and at the end of the month 11:56.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 Italy in October is this: The average highest temperature in Italy in October is 21.1 ℃ (69.98 ℉). The average lowest temperature is 11.2 ℃ (52.16 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 23.6 ℃ (74.48 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 18.8 ℃ (65.84 ℉). The average number of rainy days in October is 8.1. The average rainfall is 112.4 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 11:56 (hours and minutes), in the middle of the month 11:15 and at the end of the month 10:34.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 Italy in November is this: The average highest temperature in Italy in November is 16.5 ℃ (61.7 ℉). The average lowest temperature is 7.3 ℃ (45.14 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 18.8 ℃ (65.84 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 14.55 ℃ (58.19 ℉). The average number of rainy days in November is 9.7. The average rainfall is 118.1 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 10:34 (hours and minutes), in the middle of the month 9:58 and at the end of the month 9:28.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 Italy in December is this: The average highest temperature in Italy in December is 12.6 ℃ (54.68 ℉). The average lowest temperature is 4.4 ℃ (39.92 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 14.55 ℃ (58.19 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 12.35 ℃ (54.23 ℉). The average number of rainy days in December is 8.1. The average rainfall is 79.1 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 9:28 (hours and minutes), in the middle of the month 9:10 and at the end of the month 9:07.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.