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 is the coldest month, exhibiting average temperatures of 29.1°F (-1.6°C) at the peak and 17.2°F (-8.2°C) at the base.Humidity
In January, the average relative humidity in Seneca is 83%.Rainfall
In Seneca, during January, the rain falls for 6.3 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, in Seneca, there are 154.1 rainfall days, and 31.73" (806mm) of precipitation is accumulated.Snowfall
Months with snowfall in Seneca, Illinois, are January through April, October through December. In January, it is snowing for 11.9 days. Throughout January, 4.29" (109mm) of snow is accumulated. Throughout the year, there are 39.8 snowfall days, and 15.71" (399mm) of snow is accumulated.Daylight
The average length of the day in January in Seneca is 9h and 36min.On the first day of the month, sunrise is at 7:20 am and sunset at 4:35 pm. On the last day of January, in Seneca, sunrise is at 7:06 am and sunset at 5:08 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 3.9h of sunshine.UV index
The month with the lowest UV index in Seneca, Illinois, is January, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 1 during January translates into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Seneca?
How cold is it in Seneca in January?
What is the average humidity in January in Seneca?
How much does it rain in Seneca in January?
How much does it snow in Seneca in January?
How many hours of daylight does Seneca have in January?
When are sunrise and sunset in January in Seneca?
What is the month with the least sunshine in Seneca?
How long on average sun shines in January in Seneca?
What is the month with the lowest UV index in Seneca?
What is the UV index intensity in January in Seneca?
Average temperature in January
Seneca, IL
- Average high temperature in January: 29.1°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in January: 17.2°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in January
Seneca, IL
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Seneca, IL
- Average wind speed in January: 10.1mph
The windiest months (with the highest average wind speed) are January and April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in January
Seneca, IL
- Average humidity in January: 83%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Seneca, IL
- Average rainfall in January: 1.81"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days in January
Seneca, IL
- Average rainfall days in January: 6.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in January
Seneca, IL
- Average snowfall in January: 4.29"
The month with the highest snowfall is February (4.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Seneca, IL
- Average snowfall days in January: 11.9 days
The month with the highest number of snowfall days is January (11.9 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
Seneca, 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 18min).
- Average sunshine in January: 3h and 5min
The months with the most sunshine are June and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in January
Seneca, IL
- Average sunshine days in January: 14 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in January
Seneca, IL
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Seneca, IL
- Average cloud cover in January: 59
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in January
Seneca, IL
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Seneca, Illinois, USA
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