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
January, on average, is the coldest month, registering a high temperature of 28.2°F (-2.1°C) and a low of 16.5°F (-8.6°C).Humidity
In Altona, the average relative humidity in January is 83%.Rainfall
In January, the rain falls for 4 days. Throughout January, 0.75" (19mm) of precipitation is accumulated. Throughout the year, there are 127.7 rainfall days, and 17.8" (452mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Altona. The month with the most snowfall in Altona, Illinois, is January, when snow falls for 10.5 days and typically aggregates up to 2.17" (55mm) of snow.Daylight
In Altona, the average length of the day in January is 9h and 37min.On the first day of the month, sunrise is at 7:25 am and sunset at 4:42 pm. On the last day of January, in Altona, Illinois, sunrise is at 7:12 am and sunset at 5:15 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 4h of sunshine.UV index
The month with the lowest UV index is January, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A daily high UV index of 1 in January leads to these guidelines:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. 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.
Frequently asked questions
What time of the year is the coldest in Altona?
How cold is it in Altona in January?
What is the average humidity in January in Altona?
How many days does it rain in January in Altona?
What is the snowiest month in Altona?
How much does it snow in Altona in January?
What is the average length of the day in January in Altona?
When are sunrise and sunset in January in Altona?
What is the month with the least sunshine in Altona?
How long on average sun shines in January in Altona?
What is the month with the lowest UV index in Altona?
How high is the UV index in January in Altona?
Average temperature in January
Altona, IL
- Average high temperature in January: 28.2°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in January: 16.5°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in January
Altona, IL
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Altona, IL
- Average wind speed in January: 10.4mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in January
Altona, IL
- Average humidity in January: 83%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Altona, IL
- Average rainfall in January: 0.75"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is December (0.71").
Average rainfall days in January
Altona, IL
- Average rainfall days in January: 4 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (4 days).
Average snowfall in January
Altona, IL
- Average snowfall in January: 2.17"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Altona, IL
- Average snowfall days in January: 10.5 days
The month with the highest number of snowfall days is January (10.5 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
Altona, IL
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 4h and 0min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in January
Altona, IL
- Average sunshine days in January: 16.8 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.2 days).
Average UV index in January
Altona, IL
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Altona, IL
- Average cloud cover in January: 57
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in January
Altona, IL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Altona, Illinois, USA
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