February weather forecast
Decatur, IL

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Weather in February

The winter in February, hovering a touch above January's chilling norms, retains Decatur's freezing aura but brings some respite with the temperature rising slightly. The slight dip in snowfall to 1.73" (44mm) makes way for marginally friendlier conditions outdoors. Nonetheless, the campaign of layered clothing continues, complimented by survival essentials against the freezing winds, now a tad steadier than before. The days are imperceptibly lengthening, applying subtle hints of the eventual onset of spring. The subtle rise in temperature marks a slow but steady transition from the peak winters.

Temperature

Decatur registers an average high-temperature of a still wintry 37.8°F (3.2°C) with the arrival of February, showing minor deviation from the preceding month. Throughout February, Decatur witnesses a nighttime temperature average of 25.2°F (-3.8°C).

Humidity

In February, the average relative humidity in Decatur is 79%.

Rainfall

February and December are months with the least rain when the rain falls for 5.8 days and typically aggregates up to 0.87" (22mm) of rain.

Snowfall

January through April, November and December are months with snowfall. In February, it is snowing for 5.9 days. Throughout February, 1.73" (44mm) of snow is accumulated. Throughout the year, there are 23.1 snowfall days, and 5.67" (144mm) of snow is accumulated.

Daylight

In Decatur, the average length of the day in February is 10h and 43min.
On the first day of February in Decatur, Illinois, sunrise is at 7:03 am and sunset at 5:14 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 5:47 pm CST.

Sunshine

In Decatur, the average sunshine in February is 4.3h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: A daily maximum UV index of 2 in February translates into the following instructions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
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Frequently asked questions

Is February cold in Decatur?

An average high-temperature, in February, in Decatur, is 37.8°F (3.2°C) and the average low-temperature is 25.2°F (-3.8°C).

What is the average humidity in February in Decatur?

The average relative humidity in February in Decatur, Illinois, is 79%.

What is the driest month in Decatur?

February and December are months with the least rain when the rain falls for 5.8 days and typically aggregates up to 0.87" (22mm) of rain.

How many days does it rain in February in Decatur?

In Decatur, in February, it is raining for 5.8 days, with typically 0.87" (22mm) of accumulated precipitation.

How much does it snow in Decatur in February?

In Decatur, Illinois, during February, snow falls for 5.9 days and regularly aggregates up to 1.73" (44mm) of snow.

How many hours of daylight does Decatur have in February?

In February, the average day length is 10h and 43min.

When are sunrise and sunset in February in Decatur?

On the first day of February in Decatur, sunrise is at 7:03 am and sunset at 5:14 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 5:47 pm CST.

How long on average sun shines in February in Decatur?

In February, the average sunshine duration in Decatur, Illinois, is 4.3h.

When is the lowest UV index in Decatur?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Decatur, Illinois.

How high is the UV index in February in Decatur?

The average daily maximum UV index in February in Decatur, Illinois, is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFebruaryMAMJJASOND
Jan
February
Mar
Average high temperature
32.9°F 0.5°C
37.8°F 3.2°C
50.5°F 10.3°C
Average low temperature
21.2°F -6°C
25.2°F -3.8°C
35.6°F 2°C
Average pressure
30.15" 766mmHg
30.12" 765mmHg
30.08" 764mmHg
Average wind speed
10.7mph 17.2km/h
10.6mph 17.1km/h
10.3mph 16.6km/h
Average max. wind speed
11.4mph 18.3km/h
11.2mph 18km/h
11mph 17.7km/h
Average wind speed gusts
16.7mph 26.9km/h
16.5mph 26.6km/h
15.9mph 25.6km/h
Average humidity
79%
79%
75%
Average rainfall
1.06" 27mm
0.87" 22mm
1.3" 33mm
Average rainfall days
6.3
5.8
11.6
Average snowfall
1.85" 47mm
1.73" 44mm
0.98" 25mm
Average snowfall days
7.2
5.9
2.6
Average daylight
9h 4min
10h 4min
12h 0min
Average sunshine
4h 1min
4h 2min
6h 2min
Average sunshine days
19.5
16.7
16.4
Average UV index
2
2
3
Average cloud cover
56%
54%
47%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in February
Decatur, IL

Average temperature in February - Decatur, IL
  • Average high temperature in February: 37.8°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.9°F).

  • Average low temperature in February: 25.2°F

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

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Average pressure in February
Decatur, IL

Average pressure in February - Decatur, IL
  • Average pressure in February: 30.12"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in February
Decatur, IL

Average wind speed in February - Decatur, 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).

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Average humidity in February
Decatur, IL

Average humidity in February - Decatur, 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%).

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Average rainfall in February
Decatur, IL

Average rainfall in February - Decatur, IL
  • Average rainfall in February: 0.87"

The wettest month (with the highest rainfall) is May (2.01").
The driest months (with the least rainfall) are February and December (0.87").

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Average rainfall days in February
Decatur, IL

Average rainfall days in February - Decatur, IL
  • Average rainfall days in February: 5.8 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (5.8 days).

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Average snowfall in February
Decatur, IL

Average snowfall in February - Decatur, IL
  • Average snowfall in February: 1.73"

The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in February
Decatur, IL

Average snowfall days in February - Decatur, IL
  • Average snowfall days in February: 5.9 days

The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in February /
Average sunshine in February
Decatur, IL

Average daylight in February / Average sunshine in February - Decatur, IL
  • Average daylight in February: 10h 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 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).

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Average sunshine days in February
Decatur, IL

Average sunshine days in February - Decatur, IL
  • Average sunshine days in February: 16.7 days

The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.5 days).

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Average UV index in February
Decatur, IL

Average UV index in February - Decatur, 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).

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Average cloud cover in February
Decatur, IL

Average cloud cover in February - Decatur, 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 September (Cloud cover 29).

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Average visibility in February
Decatur, IL

Average visibility in February - Decatur, 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).

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Decatur, Illinois, USA

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