Contents
- Weather in February
- Frequently asked questions
- Average temperature in February
- Average pressure in February
- Average wind speed in February
- Average humidity in February
- Average rainfall in February
- Average rainfall days in February
- Average snowfall in February
- Average snowfall days in February
- Average daylight in February
- Average sunshine in February
- Average sunshine days in February
- Average UV index in February
- Average cloud cover in February
- Average visibility in February
Weather in February
Temperature
With the arrival of February, Sullivan's average high-temperature registers at a still cold 38.7°F (3.7°C), indicating a subtle variation from the previous month. Sullivan records an average nighttime low-temperature of 25.5°F (-3.6°C) throughout February.Humidity
In Sullivan, the average relative humidity in February is 79%.Rainfall
The month with the least rainfall is February, when the rain falls for 5.9 days and typically collects 0.71" (18mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In February, it is snowing for 6 days. Throughout February, 0.98" (25mm) of snow is accumulated. In Sullivan, during the entire year, snow falls for 21.5 days and aggregates up to 4.53" (115mm) of snow.Daylight
In February, the average length of the day is 10h and 44min.On the first day of the month, sunrise is at 7:02 am and sunset at 5:13 pm. On the last day of February, in Sullivan, sunrise is at 6:27 am and sunset at 5:46 pm CST.
Sunshine
In Sullivan, the average sunshine in February is 4.3h.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 reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 2 during February leads to these instructions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is February cold in Sullivan?
What is the average humidity in February in Sullivan?
What is the driest month in Sullivan?
How much does it rain in Sullivan in February?
How much does it snow in Sullivan in February?
What is the average length of the day in February in Sullivan?
When are sunrise and sunset in February in Sullivan?
How long on average sun shines in February in Sullivan?
What are the months with the lowest UV index in Sullivan?
How high is the UV index in February in Sullivan?
Average temperature in February
Sullivan, IL
- Average high temperature in February: 38.7°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in February: 25.5°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in February
Sullivan, IL
- Average pressure in February: 30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in February
Sullivan, IL
- Average wind speed in February: 10.6mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in February
Sullivan, IL
- Average humidity in February: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in February
Sullivan, IL
- Average rainfall in February: 0.71"
The wettest month (with the highest rainfall) is June (1.85").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in February
Sullivan, IL
- Average rainfall days in February: 5.9 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in February
Sullivan, IL
- Average snowfall in February: 0.98"
The month with the highest snowfall is January (1.54").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in February
Sullivan, IL
- Average snowfall days in February: 6 days
The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in February /
Average sunshine in February
Sullivan, IL
- Average daylight in February: 10h and 4min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in February: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in February
Sullivan, IL
- Average sunshine days in February: 16.7 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in February
Sullivan, IL
- Average UV index in February: 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 February
Sullivan, IL
- Average cloud cover in February: 54
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in February
Sullivan, IL
- Average visibility in February: 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).
Sullivan, Illinois, USA
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