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, recording an average high temperature of 32.2°F (0.1°C) and a low temperature of 20.5°F (-6.4°C), is River Forest's coldest month.Humidity
January and December, with an average relative humidity of 83%, are the most humid months.Rainfall
In River Forest, in January, during 6.3 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, there are 142.1 rainfall days, and 20.91" (531mm) of precipitation is accumulated.Snowfall
Months with snowfall in River Forest are January through April, October through December. In January, it is snowing for 10.4 days. Throughout January, 1.85" (47mm) of snow is accumulated. In River Forest, during the entire year, snow falls for 34.7 days and aggregates up to 8.74" (222mm) of snow.Daylight
In River Forest, the average length of the day in January is 9h and 43min.On the first day of the month, sunrise is at 8:04 am and sunset at 5:27 pm. On the last day of January, sunrise is at 7:52 am and sunset at 6:00 pm EST.
Sunshine
The month with the least sunshine in River Forest is January, with an average of 3.7h of sunshine.UV index
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 2 during January leads to these advisories:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Consider carefully! The reflective quality of snow 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
What is the coldest time of year?
How cold is January?
What is the most humid month?
What is the average humidity in January?
How many days does it rain in January?
How many days does it snow in January in River Forest?
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 River Forest have in January?
When is the lowest UV index?
What is the UV index intensity in January in River Forest?
Average temperature in January
River Forest, IN
- Average high temperature in January: 32.2°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in January: 20.5°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in January
River Forest, IN
- 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 (29.93"Hg).
Average wind speed in January
River Forest, IN
- Average wind speed in January: 10.3mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in January
River Forest, IN
- Average humidity in January: 83%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in January
River Forest, IN
- Average rainfall in January: 1.26"
The wettest month (with the highest rainfall) is May (2.68").
The driest months (with the least rainfall) are February and November (1.14").
Average rainfall days in January
River Forest, IN
- Average rainfall days in January: 6.3 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (6.1 days).
Average snowfall in January
River Forest, IN
- Average snowfall in January: 1.85"
The months with the highest snowfall are February and December (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
River Forest, IN
- Average snowfall days in January: 10.4 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
River Forest, IN
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January: 3h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
River Forest, IN
- Average sunshine days in January: 15.7 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in January
River Forest, IN
- 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, October, November and December (UV index 2).
Average cloud cover in January
River Forest, IN
- Average cloud cover in January: 62
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are June, July and August (Cloud cover 32).
Average visibility in January
River Forest, IN
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
River Forest, Indiana, USA
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