Springfield weather in September: Springfield, Illinois: normal highs, lows, rain and records for September
Springfield in September has a normal high of 80°F and a normal low of 56°F, a daily mean of 68°F, falling from 84°F on the 1st to 75°F by the 30th. Measurable precipitation falls on 7 days in a normal September, 2.88 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 13°C, 73 mm of precipitation in September.
- NOAA stationSpringfield Abraham Lincoln Capital Airport
- Station IDUSW00093822
- Location39.84°N 89.68°W
- Elevation594 ft (181 m)
- From the center4 miles
- Population112,949
- Jan 36° 20°
- Feb 41° 24°
- Mar 53° 33°
- Apr 66° 43°
- May 76° 54°
- Jun 84° 63°
- Jul 87° 66°
- Aug 85° 64°
- Sep 80° 56°
- Oct 67° 45°
- Nov 53° 34°
- Dec 41° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Springfield in September?
The normal high is 80°F and the normal low 56°F, for a daily mean of 68.0°F. September is 6.9°F cooler than August and 12.0°F warmer than October. September is the 4th warmest month of the year in Springfield and the 7th wettest. Across the month the normal high falls 9°F, from 84°F on September 1 to 75°F on September 30. From one year to the next September's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 65°F and 71°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 26%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 84°F | 61°F | 25% | 16% |
| September 8 | 83°F | 59°F | 25% | 16% |
| September 15 | 81°F | 56°F | 25% | 16% |
| September 22 | 78°F | 53°F | 25% | 16% |
| September 30 | 75°F | 50°F | 26% | 16% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 84°F | 61°F | 25% | 16% | 13 h 10 min |
| September 2 | 84°F | 61°F | 25% | 16% | 13 h |
| September 3 | 84°F | 61°F | 25% | 16% | 13 h |
| September 4 | 84°F | 60°F | 25% | 16% | 13 h |
| September 5 | 83°F | 60°F | 25% | 16% | 13 h |
| September 6 | 83°F | 60°F | 25% | 16% | 12 h 50 min |
| September 7 | 83°F | 59°F | 25% | 16% | 12 h 50 min |
| September 8 | 83°F | 59°F | 25% | 16% | 12 h 50 min |
| September 9 | 82°F | 58°F | 25% | 16% | 12 h 50 min |
| September 10 | 82°F | 58°F | 25% | 16% | 12 h 40 min |
| September 11 | 82°F | 58°F | 25% | 16% | 12 h 40 min |
| September 12 | 82°F | 57°F | 25% | 16% | 12 h 40 min |
| September 13 | 81°F | 57°F | 25% | 16% | 12 h 40 min |
| September 14 | 81°F | 57°F | 25% | 16% | 12 h 30 min |
| September 15 | 81°F | 56°F | 25% | 16% | 12 h 30 min |
| September 16 | 80°F | 56°F | 25% | 16% | 12 h 30 min |
| September 17 | 80°F | 55°F | 25% | 16% | 12 h 30 min |
| September 18 | 80°F | 55°F | 25% | 16% | 12 h 20 min |
| September 19 | 79°F | 55°F | 25% | 16% | 12 h 20 min |
| September 20 | 79°F | 54°F | 25% | 16% | 12 h 20 min |
| September 21 | 79°F | 54°F | 25% | 16% | 12 h 20 min |
| September 22 | 78°F | 53°F | 25% | 16% | 12 h 10 min |
| September 23 | 78°F | 53°F | 25% | 16% | 12 h 10 min |
| September 24 | 78°F | 52°F | 25% | 16% | 12 h 10 min |
| September 25 | 77°F | 52°F | 25% | 16% | 12 h 10 min |
| September 26 | 77°F | 52°F | 25% | 16% | 12 h |
| September 27 | 76°F | 51°F | 26% | 16% | 12 h |
| September 28 | 76°F | 51°F | 26% | 16% | 12 h |
| September 29 | 76°F | 51°F | 26% | 16% | 11 h 50 min |
| September 30 | 75°F | 50°F | 26% | 16% | 11 h 50 min |
- Normal high
- 80°FSeptember average
- Normal low
- 56°FSeptember average
- Precipitation
- 2.88 inmonth total
- Days with precipitation
- 70.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 26
- Days at 80°F or more
- 16
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093822; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Springfield in September?
On a given September day the chance of 0.01 inch or more is 25% on average, highest around September 30 (26%). In all, 2.88 in falls on 7 days of a normal September, 1 of them with an inch or more.
In a normal September in Springfield, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093822.
How humid and windy is Springfield in September?
At 3 p.m. the normal temperature is 73°F with 43% relative humidity and a dew point of 49°F; at 6 a.m. it is 53°F with 86% humidity. The wind averages 7.5 mph, most often from the west-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 53°F | 49°F | 86% | 5.9 mph | 72% |
| 9 a.m. | 63°F | 52°F | 66% | 8.6 mph | 71% |
| noon | 71°F | 50°F | 48% | 9.8 mph | 69% |
| 3 p.m. | 73°F | 49°F | 43% | 9.9 mph | 71% |
| 6 p.m. | 65°F | 51°F | 59% | 6.5 mph | 76% |
| 9 p.m. | 59°F | 50°F | 73% | 6.6 mph | 78% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093822. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Springfield?
The warmest September temperature on Springfield's official record (since 1879) is 102°F, on September 1, 2011; the coldest is 31°F, on September 30, 1899. The wettest September brought 15.16 in (1926).
The September mean against the 1991-2020 normal of 68.0°F: 2021 69.9°F (+1.9), 2022 67.0°F (−1.0), 2023 69.1°F (+1.1), 2024 68.5°F (+0.5), 2025 69.2°F (+1.2), 2026 74.3°F (+6.3). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 69.9°F | +1.9°F | 3.84 in |
| 2022 | 67.0°F | −1.0°F | 3.70 in |
| 2023 | 69.1°F | +1.1°F | 1.98 in |
| 2024 | 68.5°F | +0.5°F | 1.66 in |
| 2025 | 69.2°F | +1.2°F | 0.56 in |
| 2026 | 74.3°F | +6.3°F | 1.71 in |
Source: records: ACIS, NWS threaded record SPIthr; recent months: ACIS, station USW00093822. Records and recent months use complete months only.
How does September in Springfield compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, September normal highs run from 72°F in Barrington to 84°F in Anna; Springfield's is 80°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.