Springfield, IL

Illinois · Records since 1879–2026

☁️ 80°F Feels like 83°
Currently in Springfield
As of 1:30 PM CDT

Records for September 11

🔥 Record High

98°F

September 11, 1936

+16° from 82° normal

❄ Record Low

39°F

September 11, 1917

-19° from 58° normal
🌞 Normal high: 82°F 🌑 Normal low: 58°F 1991–2020 normals

All-Time Records — Springfield

🔥
112°F
Hottest Day Ever
Jul 14, 1954
❄
-24°F
Coldest Day Ever
Feb 13, 1905
🌧
5.59"
Wettest Day Ever
Aug 12, 2016
☃
17.0"
Most Snow in One Day
Mar 24, 2013

First & Last Dates — Springfield

How early and how late each seasonal turning point has ever arrived, across the full period of record

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Range ever recorded Normal date (1991–2020)
239 days
Longest growing season
1945
147 days
Shortest growing season
2020
183 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 98°F September 11, 1936
2 96°F September 11, 1952
3 96°F September 11, 1933
4 95°F September 11, 1931
5 95°F September 11, 1897
6 94°F September 11, 2000
7 92°F September 11, 2013
8 92°F September 11, 2005
9 92°F September 11, 1947
10 92°F September 11, 1942

Top 5 Record Lows — September 11

# Temp Date
🥶 39°F September 11, 1917
2 42°F September 11, 1967
3 42°F September 11, 1940
4 43°F September 11, 1992
5 44°F September 11, 1970
About this data — Records are sourced from the NOAA Threadex dataset via RCC ACIS, a quality-controlled record for long-term climate stations. Threadex adjusts for station relocations and observation-time changes, making records comparable across all years since 1879–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Springfield

threshold: 94°F (90th percentile of historical Jun–Aug highs)
4.7
Avg heat wave length
days (historical)
99°
Avg peak temp
during heat waves
32
Dangerous nights 2026
Overnights ≥ 70°F
1
Heat waves 2026
so far

Days ≥ 90°F Per Year

1879–2026
25
2026 so far
31
Avg/year 1970–2025
32
Avg/year (last 10 complete)
70
Most in a year (1936)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Springfield

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jun 17, 1933 – Jul 2, 1933 16 101°F (Jun 30) 97°F 73°F
2 Jul 3, 1936 – Jul 17, 1936 15 110°F (Jul 14) 104°F 79°F
3 Aug 12, 1936 – Aug 26, 1936 15 106°F (Aug 18) 101°F 76°F
4 Jul 15, 1901 – Jul 28, 1901 14 107°F (Jul 22) 98°F 73°F
5 Jul 5, 1879 – Jul 16, 1879 12 102°F (Jul 11) 97°F 76°F
6 Jun 28, 2012 – Jul 7, 2012 10 104°F (Jul 6) 100°F 72°F
7 Aug 25, 1953 – Sep 3, 1953 10 99°F (Sep 1) 96°F 69°F
8 Jul 18, 1934 – Jul 26, 1934 9 107°F (Jul 24) 102°F 78°F
9 Jun 24, 1931 – Jul 2, 1931 9 102°F (Jun 29) 100°F 78°F
10 Jul 5, 1914 – Jul 13, 1914 9 101°F (Jul 11) 96°F 71°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

Nights where the overnight low exceeded the 1991–2020 normal low

48
2026 total
above-normal nights
43.9
Avg / summer
1970–2020
72
Most in a summer
1943

Above-Normal Summer Nights Per Year

Average June–August Low by Decade

Overnight lows · complete decades only

Precipitation

Annual totals and trend across the full period of record · see this year's standing →

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1879–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1879, annual totals have trended +0.17" per decade, about +2.5" across the record.

Heavy Rain Days Per Year (≥ 1.0")

Compare year-to-year changes in days with heavy rainfall (≥ 1.0")

This Year — 2026

How Springfield is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

134 of 253 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

34.12"
2026 YTD
Normal: 28.08"
+6.04"
0.48"
September so far
September normal: 2.88"
-2.40"
11
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Springfield is 6.04" ahead of the normal pace

Period Review — Jun 1 – Aug 31, 2026

Any window, evaluated against every other year on record — 92 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
74.9°F
Average temperature
71st-warmest of 147
+0.3°
vs. average
Normal: 74.6°F (1991–2020)

Average Temperature by Year — Jun 1 – Aug 31

1880–2026 · 2026 highlighted

Precipitation by Year — Jun 1 – Aug 31

1880–2025 · 2026 highlighted · trend +0.16" per decade (wetter since 1880)

Warmest Jun 1 – Aug 31 on Record

# Year Avg Temp
1 1936 81.0°F
2 1934 80.6°F
3 1933 78.8°F
4 1913 78.8°F
5 1914 78.6°F
6 1943 78.6°F
7 1901 78.1°F
8 1944 78.1°F
9 1983 78.1°F
10 1931 78.0°F

Coolest Jun 1 – Aug 31 on Record

# Year Avg Temp
1 2004 70.4°F
2 1915 70.7°F
3 1950 70.8°F
4 1904 71.4°F
5 1927 71.4°F
6 1889 71.5°F
7 1985 71.6°F
8 1992 71.6°F
9 1967 71.7°F
10 1883 71.8°F
About this data. Pick any start and end date and this becomes the same kind of review as the Month and Fall tabs, just for exactly the window you asked for — the generalized version of the same engine, evaluated across every year on record. Average temperature is the mean of each day's (high + low) / 2; precipitation is the sum of daily totals. A year missing more than about a fifth of the window's days is excluded from the temperature ranking; any missing day excludes a year from the precipitation ranking, since an unreported day is unreported rain. Ranges that cross from December into January aren't supported yet. Normals are the 1991–2020 mean for the same window.
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