January weather forecastLannon, WI
January
Weather in January
January, the same as December, in Lannon, Wisconsin, is a freezing cold winter month, with temperature in the range of an average low of 14.4°F (-9.8°C) and an average high of 25.2°F (-3.8°C).Temperature
Lannon's coldest temperatures are experienced in January, with average high temperatures of 25.2°F (-3.8°C) and lows of 14.4°F (-9.8°C).Humidity
January is the most humid month, with an average relative humidity of 87%.Rainfall
In January, in Lannon, the rain falls for 4.3 days. Throughout January, 1.3" (33mm) of precipitation is accumulated. In Lannon, Wisconsin, during the entire year, the rain falls for 139.2 days and collects up to 25.28" (642mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Lannon. The month with the most snowfall is January, when snow falls for 12.6 days and typically aggregates up to 4.02" (102mm) of snow.Daylight
In Lannon, the average length of the day in January is 9h and 26min.On the first day of January, sunrise is at 7:24 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 5:02 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 3.6h of sunshine.UV index
The months with the lowest UV index in Lannon are January, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 1 in January converts into the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Lannon, WI
- Average high temperature in January: 25.2°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in January: 14.4°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in January
Lannon, WI
- Average pressure in January: 30.09"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Lannon, WI
- Average wind speed in January: 11.1mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in January
Lannon, WI
- Average humidity in January: 87%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (76%).
Average rainfall in January
Lannon, WI
- Average rainfall in January: 1.3"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days in January
Lannon, WI
- Average rainfall days in January: 4.3 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in January
Lannon, WI
- Average snowfall in January: 4.02"
The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Lannon, WI
- Average snowfall days in January: 12.6 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Lannon, WI
- 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 6min).
- Average sunshine in January: 3h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in January
Lannon, WI
- Average sunshine days in January: 14.5 days
The month with the most sunshine days is December (15.9 days).
The month with the least sunshine days is April (12 days).
Average UV index in January
Lannon, WI
- Average UV index in January: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in January
Lannon, WI
- Average cloud cover in January: 63
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in January
Lannon, WI
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
