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
Plymouth's January weather reaches an average high of 31.1°F (-0.5°C) and an average low of 19°F (-7.2°C), making it the coldest month.Humidity
In Plymouth, Illinois, the average relative humidity in January is 80%.Rainfall
In Plymouth, Illinois, during January, the rain falls for 3.3 days and regularly aggregates up to 0.39" (10mm) of precipitation. Throughout the year, there are 94.4 rainfall days, and 7.76" (197mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. The month with the most snowfall in Plymouth, Illinois, is January, when snow falls for 6.3 days and typically aggregates up to 0.67" (17mm) of snow.Daylight
The average length of the day in January is 9h and 41min.On the first day of January, sunrise is at 7:26 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 5:20 pm CST.
Sunshine
With an average of 4.1h of sunshine, January has the least sunshine of the year in Plymouth.UV index
The month with the lowest UV index is January, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 1 in January leads to these guidelines:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Frequently asked questions
What is the coldest time of year in Plymouth?
How cold is January in Plymouth?
What is the average humidity in January in Plymouth?
How much does it rain in Plymouth in January?
When does it snow the most in Plymouth?
How much does it snow in Plymouth in January?
What is the average length of the day in January in Plymouth?
What time are sunrise and sunset in January in Plymouth?
What is the month with the least sunshine in Plymouth?
How many hours of sunshine does Plymouth have in January?
When is the lowest UV index in Plymouth?
What is the UV index intensity in January in Plymouth?
Average temperature in January
Plymouth, IL
- Average high temperature in January: 31.1°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in January: 19°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in January
Plymouth, 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 (29.9"Hg).
Average wind speed in January
Plymouth, IL
- Average wind speed in January: 10.5mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in January
Plymouth, IL
- Average humidity in January: 80%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Plymouth, IL
- Average rainfall in January: 0.39"
The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is December (0.35").
Average rainfall days in January
Plymouth, IL
- Average rainfall days in January: 3.3 days
The month with the highest number of rainy days is May (12.3 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in January
Plymouth, IL
- Average snowfall in January: 0.67"
The month with the highest snowfall is January (0.67").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Plymouth, IL
- Average snowfall days in January: 6.3 days
The month with the highest number of snowfall days is January (6.3 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
Plymouth, 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 months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in January
Plymouth, IL
- Average sunshine days in January: 22.8 days
The month with the most sunshine days is December (23.5 days).
The month with the least sunshine days is June (13.9 days).
Average UV index in January
Plymouth, IL
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Plymouth, IL
- Average cloud cover in January: 55
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in January
Plymouth, 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).
Plymouth, Illinois, USA
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