Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The onset of May brings an average high-temperature of a pleasant 20.4°C (68.7°F), nearly matching the April temperature. In Siena, an average low-temperature of 8.9°C (48°F) is recorded during May nights.Humidity
In May, the average relative humidity in Siena is 78%.Rainfall
In May, the rain falls for 13.5 days. Throughout May, 39mm (1.54") of precipitation is accumulated. In Siena, Italy, during the entire year, the rain falls for 123.6 days and collects up to 363mm (14.29") of precipitation.Snowfall
In Siena, snow does not fall in April through November.Daylight
In May, the average length of the day in Siena is 14h and 42min.On the first day of May in Siena, sunrise is at 06:06 and sunset at 20:16. On the last day of the month, sunrise is at 05:37 and sunset at 20:47 CEST.
Sunshine
The average sunshine in May is 10.4h.UV index
The average daily maximum UV index in May in Siena is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In May, the maximum UV index of 5 transforms into these recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Siena?
What is the average humidity in May in Siena?
How much does it rain in Siena in May?
When it does not snow in Siena?
What is the average length of the day in May in Siena?
When are sunrise and sunset in May in Siena?
How long on average sun shines in May in Siena?
What is the UV index intensity in May in Siena?
Average temperature in May
Siena, Italy
- Average high temperature in May: 20.4°C
The warmest month (with the highest average high temperature) is August (30.3°C).
The month with the lowest average high temperature is January (8.5°C).
- Average low temperature in May: 8.9°C
The month with the highest average low temperature is August (16.3°C).
The coldest month (with the lowest average low temperature) is January (1.9°C).
Average pressure in May
Siena, Italy
- Average pressure in May: 1014mbar
The month with the highest atmospheric pressure is December (1018.4mbar).
The month with the lowest atmospheric pressure is July (1013.5mbar).
Average wind speed in May
Siena, Italy
- Average wind speed in May: 8.1km/h
The windiest months (with the highest average wind speed) are February and March (10.8km/h).
The calmest month (with the lowest average wind speed) is June (7.1km/h).
Average humidity in May
Siena, Italy
- Average humidity in May: 78%
The month with the highest relative humidity is November (85%).
The month with the lowest relative humidity is August (63%).
Average rainfall in May
Siena, Italy
- Average rainfall in May: 39mm
The wettest month (with the highest rainfall) is November (50mm).
The driest month (with the least rainfall) is August (14mm).
Average rainfall days in May
Siena, Italy
- Average rainfall days in May: 13.5 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is August (5.8 days).
Average snowfall in May
Siena, Italy
- Average snowfall in May: 0mm
The month with the highest snowfall is February (20mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in May
Siena, Italy
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Siena, Italy
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 10h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in May
Siena, Italy
- Average sunshine days in May: 16.2 days
The month with the most sunshine days is August (23.9 days).
The month with the least sunshine days is February (14.6 days).
Average UV index in May
Siena, Italy
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in May
Siena, Italy
- Average cloud cover in May: 32
The months with the most cloud cover are January, February and November (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in May
Siena, Italy
- Average visibility in May: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September and December (9km).
The months with the lowest visibility are January, October and November (8km).
Siena, Italy
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