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, on average, is the coldest month, registering a high temperature of 39.4°F (4.1°C) and a low of 26.1°F (-3.3°C).Humidity
In Rockwood, the average relative humidity in January is 75%.Rainfall
In Rockwood, in January, it is raining for 5.9 days, with typically 0.67" (17mm) of accumulated precipitation. In Rockwood, during the entire year, the rain falls for 111.9 days and collects up to 10.43" (265mm) of precipitation.Snowfall
Months with snowfall in Rockwood are January through March, October through December. In January, it is snowing for 3.7 days. Throughout January, 0.28" (7mm) of snow is accumulated. In Rockwood, during the entire year, snow falls for 10.9 days and aggregates up to 1.42" (36mm) of snow.Daylight
In January, the average length of the day is 9h and 54min.On the first day of January, sunrise is at 7:14 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 5:20 pm CST.
Sunshine
The months with the least sunshine are January and February, with an average of 4.8h of sunshine.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Rockwood. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 2 in January translates into the following instructions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Enhance your sun protection with tightly woven, yet airy clothing. Heed this! Snow reflection can almost augment the UV radiation of the sun by 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?
How much does it rain in January?
How many days does it snow in January?
How many hours of daylight does Rockwood have in January?
When is the sunrise / sunset in January in Rockwood?
What is the month with the least sunshine in Rockwood?
How long on average sun shines in January?
When is the lowest UV index in Rockwood?
What is the UV index intensity in January in Rockwood?
Average temperature in January
Rockwood, IL
- Average high temperature in January: 39.4°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (39.4°F).
- Average low temperature in January: 26.1°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in January
Rockwood, 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 (29.93"Hg).
Average wind speed in January
Rockwood, 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
Rockwood, 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
Rockwood, IL
- Average rainfall in January: 0.67"
The wettest months (with the highest rainfall) are April and May (1.22").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days in January
Rockwood, IL
- Average rainfall days in January: 5.9 days
The month with the highest number of rainy days is July (13.4 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in January
Rockwood, IL
- Average snowfall in January: 0.28"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in January
Rockwood, IL
- Average snowfall days in January: 3.7 days
The month with the highest number of snowfall days is January (3.7 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
Rockwood, IL
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January: 4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 48min).
Average sunshine days in January
Rockwood, IL
- Average sunshine days in January: 21.8 days
The month with the most sunshine days is October (21.9 days).
The month with the least sunshine days is July (13.5 days).
Average UV index in January
Rockwood, 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
Rockwood, IL
- Average cloud cover in January: 48
The months with the most cloud cover are January and February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in January
Rockwood, 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).
Rockwood, Illinois, USA
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