Champaign weather in August: Champaign, Illinois: normal highs, lows, rain and records for August
Champaign in August has a normal high of 84°F and a normal low of 62°F, a daily mean of 73°F, falling from 84°F on the 1st to 83°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 3.12 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 17°C, 79 mm of precipitation in August.
- NOAA stationChampaign Willard Airport
- Station IDUSW00094870
- Location40.04°N 88.28°W
- Elevation754 ft (230 m)
- From the center5 miles
- Population91,961
- Jan 34° 18°
- Feb 39° 22°
- Mar 52° 31°
- Apr 65° 41°
- May 76° 52°
- Jun 84° 62°
- Jul 85° 64°
- Aug 84° 62°
- Sep 79° 55°
- Oct 67° 43°
- Nov 52° 32°
- Dec 39° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Champaign in August?
The normal high is 84°F and the normal low 62°F, for a daily mean of 72.8°F. August is 1.9°F cooler than July and 5.8°F warmer than September. August is the 2nd warmest month of the year in Champaign and the 5th wettest. Across the month the normal high falls 1°F, from 84°F on August 1 to 83°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 70°F and 75°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 34%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 84°F | 64°F | 33% | 17% |
| August 8 | 84°F | 63°F | 33% | 17% |
| August 15 | 84°F | 63°F | 34% | 17% |
| August 22 | 83°F | 61°F | 33% | 17% |
| August 31 | 83°F | 60°F | 32% | 17% |
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 | 84°F | 64°F | 33% | 17% | 14 h 20 min |
| August 2 | 84°F | 64°F | 33% | 17% | 14 h 20 min |
| August 3 | 84°F | 64°F | 33% | 17% | 14 h 10 min |
| August 4 | 84°F | 64°F | 33% | 17% | 14 h 10 min |
| August 5 | 84°F | 64°F | 33% | 17% | 14 h 10 min |
| August 6 | 84°F | 63°F | 33% | 17% | 14 h 10 min |
| August 7 | 84°F | 63°F | 33% | 17% | 14 h 10 min |
| August 8 | 84°F | 63°F | 33% | 17% | 14 h |
| August 9 | 84°F | 63°F | 33% | 17% | 14 h |
| August 10 | 84°F | 63°F | 33% | 17% | 14 h |
| August 11 | 84°F | 63°F | 33% | 17% | 14 h |
| August 12 | 84°F | 63°F | 33% | 17% | 13 h 50 min |
| August 13 | 84°F | 63°F | 33% | 17% | 13 h 50 min |
| August 14 | 84°F | 63°F | 33% | 17% | 13 h 50 min |
| August 15 | 84°F | 63°F | 34% | 17% | 13 h 50 min |
| August 16 | 84°F | 62°F | 33% | 17% | 13 h 50 min |
| August 17 | 84°F | 62°F | 33% | 17% | 13 h 40 min |
| August 18 | 83°F | 62°F | 33% | 17% | 13 h 40 min |
| August 19 | 83°F | 62°F | 33% | 17% | 13 h 40 min |
| August 20 | 83°F | 62°F | 33% | 17% | 13 h 40 min |
| August 21 | 83°F | 62°F | 33% | 17% | 13 h 30 min |
| August 22 | 83°F | 61°F | 33% | 17% | 13 h 30 min |
| August 23 | 83°F | 61°F | 33% | 17% | 13 h 30 min |
| August 24 | 83°F | 61°F | 33% | 17% | 13 h 30 min |
| August 25 | 83°F | 61°F | 33% | 17% | 13 h 20 min |
| August 26 | 83°F | 61°F | 32% | 17% | 13 h 20 min |
| August 27 | 83°F | 60°F | 32% | 17% | 13 h 20 min |
| August 28 | 83°F | 60°F | 32% | 17% | 13 h 20 min |
| August 29 | 83°F | 60°F | 32% | 17% | 13 h 10 min |
| August 30 | 83°F | 60°F | 32% | 17% | 13 h 10 min |
| August 31 | 83°F | 60°F | 32% | 17% | 13 h 10 min |
- Normal high
- 84°FAugust average
- Normal low
- 62°FAugust average
- Precipitation
- 3.12 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 4
- 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
- 24
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094870; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Champaign in August?
On a given August day the chance of 0.01 inch or more is 33% on average, highest around August 15 (34%). In all, 3.12 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in Champaign, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094870.
What are the records for August in Champaign?
The warmest August temperature on this station's record (since 1997) is 97°F, on August 2, 2012; the coldest is 44°F, on August 28, 2005. The wettest August brought 7.68 in (2026).
The August mean against the 1991-2020 normal of 72.8°F: 2021 75.3°F (+2.5), 2022 73.1°F (+0.3), 2023 73.2°F (+0.4), 2024 73.2°F (+0.4), 2025 73.5°F (+0.7), 2026 73.1°F (+0.3). 6 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.3°F | +2.5°F | 3.53 in |
| 2022 | 73.1°F | +0.3°F | 4.11 in |
| 2023 | 73.2°F | +0.4°F | 3.87 in |
| 2024 | 73.2°F | +0.4°F | 4.98 in |
| 2025 | 73.5°F | +0.7°F | 1.01 in |
| 2026 | 73.1°F | +0.3°F | 7.68 in |
Source: records: ACIS, station USW00094870; recent months: ACIS, station USW00094870. Records and recent months use complete months only.
How does August in Champaign 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; Champaign's is 84°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.