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, noted for its average high-temperature of 2.9°C (37.2°F) and an average low-temperature of -3.3°C (26.1°F), is considered the coldest month.Humidity
January is the most humid month, with an average relative humidity of 88%.Rainfall
In Aarau, during January, the rain falls for 12.8 days and regularly aggregates up to 59mm (2.32") of precipitation. Throughout the year, there are 190.8 rainfall days, and 880mm (34.65") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In January, it is snowing for 9.5 days. Throughout January, 137mm (5.39") of snow is accumulated. In Aarau, during the entire year, snow falls for 39.9 days and aggregates up to 652mm (25.67") of snow.Daylight
In January, the average length of the day is 8h and 58min.On the first day of the month, sunrise is at 08:15 and sunset at 16:47. On the last day of January, sunrise is at 07:55 and sunset at 17:26 CET.
Sunshine
The average sunshine in January is 5.1h.UV index
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 2 during January translates into the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. To protect against the Sun's most potent rays, avoid direct exposure around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is it in January?
What is the most humid month?
What is the average humidity in January?
How many days does it rain in January?
How much does it snow in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Aarau have in January?
What are the months with the lowest UV index?
What is the UV index intensity in January in Aarau?
Average temperature in January
Aarau, Switzerland
- Average high temperature in January: 2.9°C
The warmest months (with the highest average high temperature) are July and August (23.3°C).
The month with the lowest average high temperature is January (2.9°C).
- Average low temperature in January: -3.3°C
The months with the highest average low temperature are July and August (11.8°C).
The coldest month (with the lowest average low temperature) is February (-3.4°C).
Average pressure in January
Aarau, Switzerland
- Average pressure in January: 1019.5mbar
The month with the highest atmospheric pressure is December (1020.9mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in January
Aarau, Switzerland
- Average wind speed in January: 8.3km/h
The windiest month (with the highest average wind speed) is March (8.8km/h).
The calmest month (with the lowest average wind speed) is August (5.9km/h).
Average humidity in January
Aarau, Switzerland
- Average humidity in January: 88%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and July (78%).
Average rainfall in January
Aarau, Switzerland
- Average rainfall in January: 59mm
The wettest month (with the highest rainfall) is May (106mm).
The driest month (with the least rainfall) is September (45mm).
Average rainfall days in January
Aarau, Switzerland
- Average rainfall days in January: 12.8 days
The month with the highest number of rainy days is May (22.4 days).
The month with the least rainy days is February (10.6 days).
Average snowfall in January
Aarau, Switzerland
- Average snowfall in January: 137mm
The month with the highest snowfall is February (153mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in January
Aarau, Switzerland
- Average snowfall days in January: 9.5 days
The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Aarau, Switzerland
- Average daylight in January: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in January
Aarau, Switzerland
- Average sunshine days in January: 11.8 days
The month with the most sunshine days is October (15 days).
The month with the least sunshine days is May (6.6 days).
Average UV index in January
Aarau, Switzerland
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in January
Aarau, Switzerland
- Average cloud cover in January: 49
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in January
Aarau, Switzerland
- Average visibility in January: 8km
The months with the highest visibility are March, April, July and August (9km).
The months with the lowest visibility are January, February, May, June, September, October, November and December (8km).
