Climateby Month

Springfield, IL climate by month

NOAA 1991-2020 normals · 600 ft elevation

Springfield has warm and oppressively humid summers and cold and snowy winters. Highs peak at 87°F in July and fall to 36°F in January. Wet days are spread through the year, from about 7 to 13 a month. Normal snowfall is about 22 in a year. By our comfort score the best months are April and May.

Warmest month
87°F
July normal high
Coldest month
20°F
January normal low
Wet days a year
115
38.0 in of precipitation
Snow a year
21.8 in
normal snowfall

How warm is Springfield?

Normal highs range from 36°F in January to 87°F in July.

20°40°60°80°100° January: normal high 36°F (2°C), low 20°F (-7°C) 36° 20° February: normal high 41°F (5°C), low 24°F (-4°C) March: normal high 53°F (12°C), low 33°F (1°C) April: normal high 66°F (19°C), low 43°F (6°C) May: normal high 76°F (24°C), low 54°F (12°C) June: normal high 84°F (29°C), low 63°F (17°C) July: normal high 87°F (31°C), low 66°F (19°C) 87° 66° August: normal high 85°F (29°C), low 64°F (18°C) September: normal high 80°F (27°C), low 56°F (13°C) October: normal high 67°F (19°C), low 45°F (7°C) November: normal high 53°F (12°C), low 34°F (1°C) December: normal high 41°F (5°C), low 25°F (-4°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Springfield?

May has the most wet days (about 13); the year brings about 38 in of precipitation.

January: 10 wet days February: 9 wet days March: 11 wet days April: 12 wet days May: 13 wet days 13 June: 11 wet days July: 9 wet days August: 8 wet days September: 7 wet days 7 October: 9 wet days November: 9 wet days December: 9 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 21.8 in a year, most of it in January.

January: 6.7 in of snow 6.7 February: 6.1 in of snow March: 3.1 in of snow April: 0.3 in of snow May: 0.0 in of snow 0.0 June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.1 in of snow November: 1.2 in of snow December: 4.3 in of snow JFMAMJJASOND

How humid is Springfield?

Muggy days peak in July, at about 20 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 3 muggy days June: 13 muggy days July: 20 muggy days 20 August: 17 muggy days September: 5 muggy days October: 1 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Abraham Lincoln Capital Airport, 3.7 mi NW of the city center.

How much daylight?

Daylight ranges from about 9.4 hours in December to 14.9 hours in June.

January: 9.7 hours of daylight February: 10.7 hours of daylight March: 12.0 hours of daylight April: 13.3 hours of daylight May: 14.4 hours of daylight June: 14.9 hours of daylight 14.9 July: 14.7 hours of daylight August: 13.7 hours of daylight September: 12.4 hours of daylight October: 11.1 hours of daylight November: 10.0 hours of daylight December: 9.4 hours of daylight 9.4 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Springfield, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 36°F20°F 2.0 in10 6.7 in 0 9.7 h
February 41°F24°F 1.9 in9 6.1 in 0 10.7 h
March 53°F33°F 2.8 in11 3.1 in 0 12.0 h
April 66°F43°F 4.0 in12 0.3 in 0 13.3 h
May 76°F54°F 4.5 in13 0.0 in 3 14.4 h
June 84°F63°F 4.6 in11 0.0 in 13 14.9 h
July 87°F66°F 3.9 in9 0.0 in 20 14.7 h
August 85°F64°F 3.4 in8 0.0 in 17 13.7 h
September 80°F56°F 2.9 in7 0.0 in 5 12.4 h
October 67°F45°F 3.3 in9 0.1 in 1 11.1 h
November 53°F34°F 2.7 in9 1.2 in 0 10.0 h
December 41°F25°F 2.1 in9 4.3 in 0 9.4 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Springfield

By our comfort score, the best months are April and May.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 300521
Feb 361415
Mar 51666
Apr 661370
May 681381
Jun 57677
Jul 52259
Aug 53457
Sep 631254
Oct 621360
Nov 46565
Dec 321516

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Springfield

The last spring frost typically comes around Apr 14, and the first fall frost around Oct 20, leaving 187 frost-free days in a typical year.

Frost and freeze dates for Springfield
Typical date1 year in 10
Last spring frost (32°F)Apr 14after Apr 29
First fall frost (32°F)Oct 20before Oct 5
Last hard freeze (28°F)Apr 3after Apr 18
First hard freeze (28°F)Oct 30before Oct 16
Frost-free season187 daysunder 165 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Springfield Capital Airport (USW00093822), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Illinois.

Hottest and coldest readings, 1991-2020

The highest reading was 104°F (July 7, 2012, and 1 other day); the lowest was -21°F (January 5, 1999).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Springfield

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Springfield Capital Airport (USW00093822), 3.7 mi NW of the city center, 594 ft . NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Abraham Lincoln Capital Airport (724390-93822), 3.7 mi NW of the city center, 590 ft . Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error