January weather forecastSiena, Italy
January
Weather in January
January in Siena, Italy, introduces the populace to the start of the calendar year with noticeably chilly temperatures. Despite the cold weather, the winter beauty of Siena captivates many tourists with frosted landscapes and quiet streets. The month experiences a small amount of snowfall with approximately 13mm (0.51") over the duration of 0.8 days. January can also be fairly cloudy with humidity levels as high as 83%, resulting in rainfall spanning 11.6 days. With a generally higher atmospheric pressure of 1016.3 mb, the winds blow mildly at an average pace, offering some relief from the winter chill.Temperature
The coldest period in Siena tends to be January, when average temperatures fluctuate between a high of 8.5°C (47.3°F) and a low of 1.9°C (35.4°F).Humidity
In January, the average relative humidity is 83%.Rainfall
In Siena, during January, the rain falls for 11.6 days and regularly aggregates up to 31mm (1.22") of precipitation. In Siena, Italy, during the entire year, the rain falls for 123.6 days and collects up to 363mm (14.29") of precipitation.Snowfall
Months with snowfall in Siena are January through March and December. In Siena, in January, during 0.8 snowfall days, 13mm (0.51") of snow is typically accumulated. Throughout the year, there are 3.6 snowfall days, and 48mm (1.89") of snow is accumulated.Daylight
In Siena, the average length of the day in January is 9h and 24min.On the first day of January in Siena, sunrise is at 07:46 and sunset at 16:49. On the last day of the month, sunrise is at 07:31 and sunset at 17:24 CET.
Sunshine
With an average of 5.3h of sunshine, January has the least sunshine of the year.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A typical high UV index of 2 in January suggests the following recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Siena, Italy
- Average high temperature in January: 8.5°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 January: 1.9°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 January
Siena, Italy
- Average pressure in January: 1016.3mbar
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 January
Siena, Italy
- Average wind speed in January: 9.3km/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 January
Siena, Italy
- Average humidity in January: 83%
The month with the highest relative humidity is November (85%).
The month with the lowest relative humidity is August (63%).
Average rainfall in January
Siena, Italy
- Average rainfall in January: 31mm
The wettest month (with the highest rainfall) is November (50mm).
The driest month (with the least rainfall) is August (14mm).
Average rainfall days in January
Siena, Italy
- Average rainfall days in January: 11.6 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 January
Siena, Italy
- Average snowfall in January: 13mm
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 January
Siena, Italy
- Average snowfall days in January: 0.8 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 January /
Average sunshine in January
Siena, Italy
- Average daylight in January: 9h and 24min
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 January: 5h and 18min
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 January
Siena, Italy
- Average sunshine days in January: 16.6 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 January
Siena, Italy
- Average UV index in January: 2
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 January
Siena, Italy
- Average cloud cover in January: 44
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 January
Siena, Italy
- Average visibility in January: 8km
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).
