Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
January
Weather in January
Temperature
January is the month when Roisan experiences its coldest temperatures, averaging a high of -2.7°C (27.1°F) and a low of -10.8°C (12.6°F).Humidity
The average relative humidity in January is 85%.Rainfall
In Roisan, in January, during 15.9 rainfall days, 81mm (3.19") of precipitation is typically accumulated. Throughout the year, in Roisan, there are 244.1 rainfall days, and 1363mm (53.66") of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Roisan, in January, snow falls for 10 days, with typically accumulated 136mm (5.35") of snow. In Roisan, during the entire year, snow falls for 42.8 days and aggregates up to 692mm (27.24") of snow.Daylight
In January, the average length of the day in Roisan is 9h and 9min.On the first day of the month, sunrise is at 08:11 and sunset at 16:56. On the last day of January, sunrise is at 07:54 and sunset at 17:34 CET.
Sunshine
The average sunshine in January is 5.5h.UV index
January, March and April, with an average maximum UV index of 1, are months with the lowest UV index in Roisan. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 1 during January leads to these advisories:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Roisan?
How cold is January in Roisan?
What is the average humidity in January in Roisan?
How much does it rain in Roisan in January?
How many days does it snow in January in Roisan?
What is the average length of the day in January in Roisan?
When are sunrise and sunset in January in Roisan?
How many hours of sunshine does Roisan have in January?
What are the months with the lowest UV index in Roisan?
What is the UV index reading in January in Roisan?
Average temperature in January
Roisan, Italy
- Average high temperature in January: -2.7°C
The warmest month (with the highest average high temperature) is July (16.5°C).
The month with the lowest average high temperature is January (-2.7°C).
- Average low temperature in January: -10.8°C
The months with the highest average low temperature are July and August (6.5°C).
The coldest months (with the lowest average low temperature) are January and February (-10.8°C).
Average pressure in January
Roisan, Italy
- Average pressure in January: 1018.8mbar
The month with the highest atmospheric pressure is December (1020.7mbar).
The month with the lowest atmospheric pressure is April (1014.9mbar).
Average wind speed in January
Roisan, Italy
- Average wind speed in January: 8.6km/h
The windiest month (with the highest average wind speed) is December (9km/h).
The calmest month (with the lowest average wind speed) is August (5.6km/h).
Average humidity in January
Roisan, Italy
- Average humidity in January: 85%
The month with the highest relative humidity is March (87%).
The months with the lowest relative humidity are July and August (77%).
Average rainfall in January
Roisan, Italy
- Average rainfall in January: 81mm
The wettest month (with the highest rainfall) is May (181mm).
The driest month (with the least rainfall) is September (77mm).
Average rainfall days in January
Roisan, Italy
- Average rainfall days in January: 15.9 days
The month with the highest number of rainy days is May (27 days).
The month with the least rainy days is December (14.9 days).
Average snowfall in January
Roisan, Italy
- Average snowfall in January: 136mm
The month with the highest snowfall is February (175mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in January
Roisan, Italy
- Average snowfall days in January: 10 days
The month with the highest number of snowfall days is February (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Roisan, Italy
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 5h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is November (Average sunshine: 5h and 12min).
Average sunshine days in January
Roisan, Italy
- Average sunshine days in January: 10.3 days
The month with the most sunshine days is October (11.7 days).
The month with the least sunshine days is May (2.7 days).
Average UV index in January
Roisan, Italy
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January, March and April (UV index 1).
Average cloud cover in January
Roisan, Italy
- Average cloud cover in January: 42
The month with the most cloud cover is May (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in January
Roisan, Italy
- Average visibility in January: 7km
The month with the highest visibility is July (9km).
The months with the lowest visibility are January, February, March, April and May (7km).
