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
The month of January sees the lowest average temperatures, reaching 32.9°F (0.5°C) at the peak and 20.7°F (-6.3°C) at the low.Humidity
In January, the average relative humidity is 79%.Rainfall
In Petersburg, Illinois, in January, during 7.1 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. In Petersburg, during the entire year, the rain falls for 146.4 days and collects up to 30.67" (779mm) of precipitation.Snowfall
Months with snowfall in Petersburg are January through April, October through December. The month with the most snowfall in Petersburg is January, when snow falls for 10.3 days and typically aggregates up to 4.02" (102mm) of snow.Daylight
In January, the average length of the day in Petersburg is 9h and 43min.On the first day of January in Petersburg, sunrise is at 7:21 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:16 pm CST.
Sunshine
January has the least sunshine of the year in Petersburg, with an average of 4.1h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In January, a daily maximum UV index of 2 leads to the following instructions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Petersburg?
How cold is it in Petersburg in January?
What is the average humidity in January in Petersburg?
How much does it rain in Petersburg in January?
When does it snow the most in Petersburg?
How many days does it snow in January in Petersburg?
How many hours of daylight does Petersburg have in January?
When is the sunrise / sunset in January in Petersburg?
What is the month with the least sunshine in Petersburg?
How many hours of sunshine does Petersburg have in January?
What is the month with the lowest UV index in Petersburg?
How high is the UV index in January in Petersburg?
Average temperature in January
Petersburg, IL
- Average high temperature in January: 32.9°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in January: 20.7°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in January
Petersburg, IL
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Petersburg, IL
- Average wind speed in January: 10.3mph
The windiest months (with the highest average wind speed) are January, February and April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in January
Petersburg, IL
- Average humidity in January: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in January
Petersburg, IL
- Average rainfall in January: 1.77"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is December (1.5").
Average rainfall days in January
Petersburg, IL
- Average rainfall days in January: 7.1 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in January
Petersburg, IL
- Average snowfall in January: 4.02"
The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Petersburg, IL
- Average snowfall days in January: 10.3 days
The month with the highest number of snowfall days is January (10.3 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
Petersburg, IL
- 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: 4h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in January
Petersburg, IL
- Average sunshine days in January: 15.2 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in January
Petersburg, IL
- 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, November and December (UV index 2).
Average cloud cover in January
Petersburg, IL
- Average cloud cover in January: 56
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in January
Petersburg, IL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Petersburg, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location