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
Riverdale reaches its lowest average temperatures in January, measuring 29.8°F (-1.2°C) at the peak and 19.6°F (-6.9°C) at the lowest.Humidity
January and February, with an average relative humidity of 82%, are the most humid months.Rainfall
In January, in Riverdale, the rain falls for 4.6 days. Throughout January, 0.51" (13mm) of precipitation is accumulated. In Riverdale, during the entire year, the rain falls for 110.3 days and collects up to 10.31" (262mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Riverdale. The month with the most snowfall in Riverdale is January, when snow falls for 9.3 days and typically aggregates up to 1.1" (28mm) of snow.Daylight
In January, the average length of the day in Riverdale, Illinois, is 9h and 34min.On the first day of the month, sunrise is at 7:17 am and sunset at 4:30 pm. On the last day of January, in Riverdale, sunrise is at 7:03 am and sunset at 5:04 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 3.6h of sunshine.UV index
The average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average maximum UV index of 2 in January leads to these recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
What is the coldest time of year in Riverdale?
How cold is it in Riverdale in January?
What is the most humid month in Riverdale?
What is the average humidity in January in Riverdale?
How much does it rain in Riverdale in January?
What is the snowiest month in Riverdale?
How many days does it snow in January in Riverdale?
What is the average length of the day in January in Riverdale?
What time are sunrise and sunset in January in Riverdale?
What is the month with the least sunshine in Riverdale?
How many hours of sunshine does Riverdale have in January?
What is the UV index intensity in January in Riverdale?
Average temperature in January
Riverdale, IL
- Average high temperature in January: 29.8°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in January: 19.6°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in January
Riverdale, IL
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Riverdale, IL
- Average wind speed in January: 11mph
The windiest month (with the highest average wind speed) is January (11mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in January
Riverdale, IL
- Average humidity in January: 82%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Riverdale, IL
- Average rainfall in January: 0.51"
The wettest months (with the highest rainfall) are May and June (1.38").
The driest months (with the least rainfall) are February and December (0.47").
Average rainfall days in January
Riverdale, IL
- Average rainfall days in January: 4.6 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in January
Riverdale, IL
- Average snowfall in January: 1.1"
The month with the highest snowfall is January (1.1").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Riverdale, IL
- Average snowfall days in January: 9.3 days
The month with the highest number of snowfall days is January (9.3 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
Riverdale, 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 12min).
- Average sunshine in January: 3h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in January
Riverdale, IL
- Average sunshine days in January: 18.3 days
The month with the most sunshine days is December (19.8 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in January
Riverdale, IL
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Riverdale, IL
- Average cloud cover in January: 62
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in January
Riverdale, 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).
Riverdale, Illinois, USA
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