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
Rock Island records the coldest temperatures in January, averaging a high of 28°F (-2.2°C) and a low of 15.6°F (-9.1°C).Humidity
January and July, with an average relative humidity of 83%, are the most humid months in Rock Island.Rainfall
In January, the rain falls for 4.3 days. Throughout January, 1.3" (33mm) of precipitation is accumulated. In Rock Island, Illinois, during the entire year, the rain falls for 138.1 days and collects up to 27.32" (694mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. The month with the most snowfall in Rock Island is January, when snow falls for 10.9 days and typically aggregates up to 3.98" (101mm) of snow.Daylight
In Rock Island, the average length of the day in January is 9h and 35min.On the first day of January, sunrise is at 7:28 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:16 pm CST.
Sunshine
The month with the least sunshine in Rock Island, Illinois, is January, with an average of 3.9h of sunshine.UV index
With an average maximum UV index of 1, January is the month with the lowest UV index in Rock Island. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 1 during January translates into the following directions:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What are the coldest months in Rock Island?
How cold is it in Rock Island in January?
What are the most humid months in Rock Island?
What is the average humidity in January in Rock Island?
How many days does it rain in January in Rock Island?
When does it snow the most in Rock Island?
How many days does it snow in January in Rock Island?
How many hours of daylight does Rock Island have in January?
When are sunrise and sunset in January in Rock Island?
What is the month with the least sunshine in Rock Island?
How many hours of sunshine does Rock Island have in January?
What is the month with the lowest UV index in Rock Island?
What is the UV index intensity in January in Rock Island?
Average temperature in January
Rock Island, IL
- Average high temperature in January: 28°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in January: 15.6°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 (15.6°F).
Average pressure in January
Rock Island, 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 (29.9"Hg).
Average wind speed in January
Rock Island, IL
- Average wind speed in January: 10.3mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in January
Rock Island, IL
- Average humidity in January: 83%
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Rock Island, IL
- Average rainfall in January: 1.3"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days in January
Rock Island, IL
- Average rainfall days in January: 4.3 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in January
Rock Island, IL
- Average snowfall in January: 3.98"
The month with the highest snowfall is January (3.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Rock Island, IL
- Average snowfall days in January: 10.9 days
The month with the highest number of snowfall days is January (10.9 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
Rock Island, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in January
Rock Island, IL
- Average sunshine days in January: 16.4 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (11.4 days).
Average UV index in January
Rock Island, IL
- Average UV index in January: 1
The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Rock Island, IL
- Average cloud cover in January: 58
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in January
Rock Island, 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).
Rock Island, Illinois, USA
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