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
Waterloo's coldest month, January, generally records average temperatures ranging from a high of 38.3°F (3.5°C) to a low of 25.2°F (-3.8°C).Humidity
In January, the average relative humidity is 75%.Rainfall
In Waterloo, in January, it is raining for 6.3 days, with typically 1.46" (37mm) of accumulated precipitation. In Waterloo, during the entire year, the rain falls for 139.8 days and collects up to 25.63" (651mm) of precipitation.Snowfall
Months with snowfall in Waterloo are January through March, September, November and December. The month with the most snowfall in Waterloo is January, when snow falls for 6.3 days and typically aggregates up to 1.89" (48mm) of snow.Daylight
The average length of the day in January is 9h and 52min.On the first day of the month, sunrise is at 7:17 am and sunset at 4:50 pm. On the last day of January, sunrise is at 7:06 am and sunset at 5:21 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 4.7h of sunshine.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Waterloo. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 2 during January, leads to the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Waterloo?
How cold is January in Waterloo?
What is the average humidity in January in Waterloo?
How many days does it rain in January in Waterloo?
What is the snowiest month in Waterloo?
How many days does it snow in January in Waterloo?
How many hours of daylight does Waterloo have in January?
What time are sunrise and sunset in January in Waterloo?
What is the month with the least sunshine in Waterloo?
How many hours of sunshine does Waterloo have in January?
What are the months with the lowest UV index in Waterloo?
What is the UV index intensity in January in Waterloo?
Average temperature in January
Waterloo, IL
- Average high temperature in January: 38.3°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in January: 25.2°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in January
Waterloo, 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 (29.92"Hg).
Average wind speed in January
Waterloo, IL
- Average wind speed in January: 9.3mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in January
Waterloo, IL
- Average humidity in January: 75%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Waterloo, IL
- Average rainfall in January: 1.46"
The wettest month (with the highest rainfall) is May (3.19").
The driest months (with the least rainfall) are February and November (1.34").
Average rainfall days in January
Waterloo, IL
- Average rainfall days in January: 6.3 days
The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in January
Waterloo, IL
- Average snowfall in January: 1.89"
The month with the highest snowfall is January (1.89").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in January
Waterloo, IL
- Average snowfall days in January: 6.3 days
The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in January /
Average sunshine in January
Waterloo, IL
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January: 4h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in January
Waterloo, IL
- Average sunshine days in January: 20.6 days
The month with the most sunshine days is January (20.6 days).
The month with the least sunshine days is July (12.5 days).
Average UV index in January
Waterloo, 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 and December (UV index 2).
Average cloud cover in January
Waterloo, IL
- Average cloud cover in January: 49
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are June and August (Cloud cover 27).
Average visibility in January
Waterloo, 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).
Waterloo, Illinois, USA
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