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
The average relative humidity in January is 75%.Rainfall
In January, in Rockwood, the rain falls for 5.9 days. Throughout January, 0.67" (17mm) of precipitation is accumulated. Throughout the year, in Rockwood, there are 111.9 rainfall days, and 10.43" (265mm) of precipitation is accumulated.Snowfall
January through March, October through December are months with snowfall in Rockwood. In Rockwood, in January, snow falls for 3.7 days, with typically accumulated 0.28" (7mm) of snow. 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 in Rockwood is 9h and 54min.On the first day of the month, sunrise is at 7:14 am and sunset at 4:50 pm. On the last day of January, sunrise is at 7:03 am and sunset at 5:20 pm CST.
Sunshine
January and February, with an average of 4.8h of sunshine, are months with the least sunshine in Rockwood.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Rockwood, Illinois. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 2 during January translates into the following directions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. To avoid the Sun's strongest rays, limit exposure around the mid-day period. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What part of the year is the coldest in Rockwood?
Is it cold in Rockwood during January?
What is the average humidity in January in Rockwood?
How many days does it rain in January in Rockwood?
How much does it snow in Rockwood in January?
What is the average length of the day in January in Rockwood?
When are sunrise and sunset in January in Rockwood?
What are the months with the least sunshine in Rockwood?
How long on average sun shines in January in Rockwood?
When is the lowest UV index in Rockwood?
What is the UV index reading 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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