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, having an average high-temperature of 30.7°F (-0.7°C) and an average low-temperature of 18.9°F (-7.3°C), is the coldest month.Humidity
In January, the average relative humidity is 82%.Rainfall
January and February are months with the least rain when the rain falls for 4.9 days and typically aggregates up to 0.79" (20mm) of rain.Snowfall
January through April, November and December are months with snowfall. The month with the most snowfall is January, when snow falls for 10.3 days and typically aggregates up to 2.05" (52mm) of snow.Daylight
In January, the average length of the day is 9h and 38min.On the first day of the month, sunrise is at 7:14 am and sunset at 4:32 pm. On the last day of January, in Iroquois, sunrise is at 7:01 am and sunset at 5:05 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 3.7h of sunshine.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 1 during January translates into these guidelines:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
What month is the coldest in Iroquois?
How cold is January in Iroquois?
What is the average humidity in January in Iroquois?
What is the driest month in Iroquois?
How much does it rain in Iroquois in January?
When does it snow the most in Iroquois?
How much does it snow in Iroquois in January?
What is the average length of the day in January in Iroquois?
What time are sunrise and sunset in January in Iroquois?
What is the month with the least sunshine in Iroquois?
How long on average sun shines in January in Iroquois?
When is the lowest UV index in Iroquois?
What is the UV index reading in January in Iroquois?
Average temperature in January
Iroquois, IL
- Average high temperature in January: 30.7°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in January: 18.9°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 (18.9°F).
Average pressure in January
Iroquois, 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 (29.93"Hg).
Average wind speed in January
Iroquois, IL
- Average wind speed in January: 10.3mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in January
Iroquois, IL
- Average humidity in January: 82%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Iroquois, IL
- Average rainfall in January: 0.79"
The wettest month (with the highest rainfall) is May (2.64").
The driest months (with the least rainfall) are January and February (0.79").
Average rainfall days in January
Iroquois, IL
- Average rainfall days in January: 4.9 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (4.9 days).
Average snowfall in January
Iroquois, IL
- Average snowfall in January: 2.05"
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Iroquois, 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
Iroquois, 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 4min
The months with the most sunshine are June and July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Iroquois, IL
- Average sunshine days in January: 16.3 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (9.4 days).
Average UV index in January
Iroquois, IL
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Iroquois, IL
- Average cloud cover in January: 61
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July, August and September (Cloud cover 34).
Average visibility in January
Iroquois, 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).
Iroquois, Illinois, USA
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