Springfield weather in August: Springfield, Illinois: normal highs, lows, rain and records for August
Springfield in August has a normal high of 85°F and a normal low of 64°F, a daily mean of 75°F, falling from 86°F on the 1st to 84°F by the 31st. Measurable precipitation falls on 8 days in a normal August, 3.37 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 18°C, 86 mm of precipitation in August.
- 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 August?
The normal high is 85°F and the normal low 64°F, for a daily mean of 74.9°F. August is 1.6°F cooler than July and 6.9°F warmer than September. August is the 2nd warmest month of the year in Springfield and the 5th wettest. Across the month the normal high falls 2°F, from 86°F on August 1 to 84°F on August 31. From one year to the next August's mean temperature typically moves about 2.5°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 72°F and 77°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 27%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 86°F | 66°F | 27% | 17% |
| August 8 | 86°F | 66°F | 27% | 16% |
| August 15 | 86°F | 65°F | 26% | 17% |
| August 22 | 85°F | 64°F | 26% | 16% |
| August 31 | 84°F | 62°F | 25% | 16% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 86°F | 66°F | 27% | 17% | 14 h 20 min |
| August 2 | 86°F | 66°F | 27% | 17% | 14 h 20 min |
| August 3 | 86°F | 66°F | 27% | 17% | 14 h 10 min |
| August 4 | 86°F | 66°F | 27% | 17% | 14 h 10 min |
| August 5 | 86°F | 66°F | 27% | 16% | 14 h 10 min |
| August 6 | 86°F | 66°F | 27% | 16% | 14 h 10 min |
| August 7 | 86°F | 66°F | 27% | 16% | 14 h |
| August 8 | 86°F | 66°F | 27% | 16% | 14 h |
| August 9 | 86°F | 65°F | 26% | 16% | 14 h |
| August 10 | 86°F | 65°F | 26% | 16% | 14 h |
| August 11 | 86°F | 65°F | 26% | 16% | 14 h |
| August 12 | 86°F | 65°F | 26% | 17% | 13 h 50 min |
| August 13 | 86°F | 65°F | 26% | 17% | 13 h 50 min |
| August 14 | 86°F | 65°F | 26% | 17% | 13 h 50 min |
| August 15 | 86°F | 65°F | 26% | 17% | 13 h 50 min |
| August 16 | 86°F | 65°F | 26% | 17% | 13 h 50 min |
| August 17 | 85°F | 65°F | 26% | 17% | 13 h 40 min |
| August 18 | 85°F | 64°F | 26% | 17% | 13 h 40 min |
| August 19 | 85°F | 64°F | 26% | 17% | 13 h 40 min |
| August 20 | 85°F | 64°F | 26% | 16% | 13 h 40 min |
| August 21 | 85°F | 64°F | 26% | 16% | 13 h 30 min |
| August 22 | 85°F | 64°F | 26% | 16% | 13 h 30 min |
| August 23 | 85°F | 64°F | 26% | 16% | 13 h 30 min |
| August 24 | 85°F | 63°F | 26% | 16% | 13 h 30 min |
| August 25 | 85°F | 63°F | 25% | 16% | 13 h 20 min |
| August 26 | 85°F | 63°F | 25% | 16% | 13 h 20 min |
| August 27 | 85°F | 63°F | 25% | 16% | 13 h 20 min |
| August 28 | 85°F | 62°F | 25% | 16% | 13 h 20 min |
| August 29 | 84°F | 62°F | 25% | 16% | 13 h 10 min |
| August 30 | 84°F | 62°F | 25% | 16% | 13 h 10 min |
| August 31 | 84°F | 62°F | 25% | 16% | 13 h 10 min |
- Normal high
- 85°FAugust average
- Normal low
- 64°FAugust average
- Precipitation
- 3.37 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 7
- Daylight
- 14 h 20 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 26
- 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 August?
On a given August day the chance of 0.01 inch or more is 26% on average, highest around August 1 (27%). In all, 3.37 in falls on 8 days of a normal August, 1 of them with an inch or more.
In a normal August in Springfield, 7 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093822.
How humid and windy is Springfield in August?
At 3 p.m. the normal temperature is 83°F with 51% relative humidity and a dew point of 63°F; at 6 a.m. it is 65°F with 90% humidity. The wind averages 6.4 mph, most often from the south in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 65°F | 61°F | 90% | 4.8 mph | 70% |
| 9 a.m. | 75°F | 64°F | 69% | 7.1 mph | 74% |
| noon | 81°F | 64°F | 55% | 8.2 mph | 69% |
| 3 p.m. | 83°F | 63°F | 51% | 8.5 mph | 67% |
| 6 p.m. | 78°F | 64°F | 62% | 6.4 mph | 78% |
| 9 p.m. | 70°F | 64°F | 80% | 5.4 mph | 82% |
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 August in Springfield?
The warmest August temperature on Springfield's official record (since 1879) is 108°F, on August 9, 1934; the coldest is 43°F, on August 13, 1964. The wettest August brought 10.82 in (2016).
The August mean against the 1991-2020 normal of 74.9°F: 2021 76.3°F (+1.4), 2022 74.6°F (−0.3), 2023 73.7°F (−1.2), 2024 73.9°F (−1.0), 2025 73.1°F (−1.8), 2026 75.5°F (+0.6). 2 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 76.3°F | +1.4°F | 5.69 in |
| 2022 | 74.6°F | −0.3°F | 5.39 in |
| 2023 | 73.7°F | −1.2°F | 6.25 in |
| 2024 | 73.9°F | −1.0°F | 3.76 in |
| 2025 | 73.1°F | −1.8°F | 0.16 in |
| 2026 | 75.5°F | +0.6°F | 3.50 in |
Source: records: ACIS, NWS threaded record SPIthr; recent months: ACIS, station USW00093822. Records and recent months use complete months only.
How does August in Springfield compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, August normal highs run from 79°F in Barrington to 89°F in Anna; Springfield's is 85°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.