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
Weather in January
Temperature
The coldest time of the year is January, with temperatures averaging a high of 35.6°F (2°C) and a low of 23.4°F (-4.8°C).Humidity
The average relative humidity in January is 78%.Rainfall
In Altamont, Illinois, in January, during 7.3 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. Throughout the year, there are 141.3 rainfall days, and 26.77" (680mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. The month with the most snowfall is January, when snow falls for 5.3 days and typically aggregates up to 2.01" (51mm) of snow.Daylight
In Altamont, the average length of the day in January is 9h and 48min.On the first day of the month, sunrise is at 7:13 am and sunset at 4:42 pm. On the last day of January, sunrise is at 7:02 am and sunset at 5:14 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 4.3h of sunshine.UV index
January, February, November 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 hazard from exposure to the Sun's UV rays for average individuals.Note: In January, a daily UV index of 2 turns into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | 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 average humidity in January in Altamont?
How many days does it rain in January?
What is the snowiest month?
How much does it snow in January?
What is the average length of the day in January?
What time are sunrise and sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Altamont have in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Altamont, IL
- Average high temperature in January: 35.6°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in January: 23.4°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in January
Altamont, IL
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Altamont, IL
- Average wind speed in January: 10.3mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in January
Altamont, IL
- Average humidity in January: 78%
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Altamont, IL
- Average rainfall in January: 1.77"
The wettest month (with the highest rainfall) is April (3.35").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days in January
Altamont, IL
- Average rainfall days in January: 7.3 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in January
Altamont, IL
- Average snowfall in January: 2.01"
The month with the highest snowfall is January (2.01").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Altamont, IL
- Average snowfall days in January: 5.3 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Altamont, IL
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in January
Altamont, IL
- Average sunshine days in January: 18.9 days
The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in January
Altamont, IL
- 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, February, November and December (UV index 2).
Average cloud cover in January
Altamont, IL
- Average cloud cover in January: 53
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in January
Altamont, IL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Altamont, Illinois, USA
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