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
Temperature records mark January as the coldest month, with highs averaging 35.6°F (2°C) and lows at 22.6°F (-5.2°C).Humidity
In January, the average relative humidity is 77%.Rainfall
The month with the least rainfall in Dow is January, when the rain falls for 5.9 days and typically collects 1.06" (27mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In January, it is snowing for 6.2 days. Throughout January, 1.65" (42mm) of snow is accumulated. In Dow, Illinois, during the entire year, snow falls for 20.9 days and aggregates up to 6.26" (159mm) of snow.Daylight
In Dow, the average length of the day in January is 9h and 48min.On the first day of the month, sunrise is at 7:20 am and sunset at 4:49 pm. On the last day of January, sunrise is at 7:08 am and sunset at 5:20 pm CST.
Sunshine
With an average of 4.5h of sunshine, January has the least sunshine of the year.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A daily high UV index of 2 in January leads to these guidelines:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
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?
What is the driest month?
How many days does it rain in January in Dow?
How many days does it snow in January in Dow?
How many hours of daylight does Dow have in January?
What time are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What is the month with the lowest UV index?
How high is the UV index in January?
Average temperature in January
Dow, IL
- Average high temperature in January: 35.6°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in January: 22.6°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in January
Dow, IL
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Dow, IL
- Average wind speed in January: 9.6mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in January
Dow, IL
- Average humidity in January: 77%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Dow, IL
- Average rainfall in January: 1.06"
The wettest month (with the highest rainfall) is June (3.07").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in January
Dow, IL
- Average rainfall days in January: 5.9 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in January
Dow, IL
- Average snowfall in January: 1.65"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Dow, IL
- Average snowfall days in January: 6.2 days
The month with the highest number of snowfall days is January (6.2 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
Dow, 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 3min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in January
Dow, IL
- Average sunshine days in January: 20.3 days
The month with the most sunshine days is January (20.3 days).
The months with the least sunshine days are May and June (12.3 days).
Average UV index in January
Dow, IL
- Average UV index in January: 2
The months with the highest UV index are May, 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
Dow, IL
- Average cloud cover in January: 51
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are August and September (Cloud cover 28).
Average visibility in January
Dow, 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).
Dow, Illinois, USA
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