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
Monticello's coldest month, January, registers temperatures that range from a high of 32.4°F (0.2°C) to a low of 20.3°F (-6.5°C).Humidity
The average relative humidity in January in Monticello is 80%.Rainfall
In January, the rain falls for 5.3 days. Throughout January, 1.1" (28mm) of precipitation is accumulated. In Monticello, during the entire year, the rain falls for 127.9 days and collects up to 16.61" (422mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. January is the month with the most snowfall in Monticello, Illinois. Snow falls for 8.3 days and accumulates 2.05" (52mm) of snow.Daylight
The average length of the day in January is 9h and 43min.On the first day of January in Monticello, sunrise is at 7:16 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 5:11 pm CST.
Sunshine
The month with the least sunshine in Monticello is January, with an average of 3.9h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: In January, the maximum UV index of 2 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. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
What are the coldest months in Monticello?
How cold is January in Monticello?
What is the average humidity in January in Monticello?
How much does it rain in Monticello in January?
When does it snow the most in Monticello?
How much does it snow in Monticello in January?
What is the average length of the day in January in Monticello?
When is the sunrise / sunset in January in Monticello?
What is the month with the least sunshine in Monticello?
How long on average sun shines in January in Monticello?
What are the months with the lowest UV index in Monticello?
What is the UV index intensity in January in Monticello?
Average temperature in January
Monticello, IL
- Average high temperature in January: 32.4°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (32.4°F).
- Average low temperature in January: 20.3°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in January
Monticello, IL
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Monticello, IL
- Average wind speed in January: 10.9mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in January
Monticello, IL
- Average humidity in January: 80%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall in January
Monticello, IL
- Average rainfall in January: 1.1"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is December (0.91").
Average rainfall days in January
Monticello, IL
- Average rainfall days in January: 5.3 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in January
Monticello, 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
Monticello, IL
- Average snowfall days in January: 8.3 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Monticello, 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: 3h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in January
Monticello, IL
- Average sunshine days in January: 18.8 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in January
Monticello, 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
Monticello, IL
- Average cloud cover in January: 57
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are June, August and September (Cloud cover 32).
Average visibility in January
Monticello, 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).
Monticello, Illinois, USA
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