Galesburg weather in August: Galesburg, Illinois: normal highs, lows, rain and records for August
Galesburg in August has a normal high of 82°F and a normal low of 63°F, a daily mean of 73°F, falling from 83°F on the 1st to 81°F by the 31st. Measurable precipitation falls on 9 days in a normal August, 3.89 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 17°C, 99 mm of precipitation in August.
- NOAA stationGalesburg
- Station IDUSC00113320
- Location40.95°N 90.39°W
- Elevation761 ft (232 m)
- From the centerunder 1 mile
- Population29,289
- Jan 30° 14°
- Feb 35° 17°
- Mar 48° 28°
- Apr 61° 40°
- May 72° 52°
- Jun 81° 62°
- Jul 84° 65°
- Aug 82° 63°
- Sep 76° 55°
- Oct 63° 43°
- Nov 48° 30°
- Dec 35° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Galesburg in August?
The normal high is 82°F and the normal low 63°F, for a daily mean of 72.8°F. August is 1.9°F cooler than July and 7.3°F warmer than September. August is the 2nd warmest month of the year in Galesburg and the 4th wettest. Across the month the normal high falls 2°F, from 83°F on August 1 to 81°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 27%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 83°F | 65°F | 27% | 20% |
| August 8 | 83°F | 65°F | 27% | 20% |
| August 15 | 83°F | 64°F | 27% | 20% |
| August 22 | 82°F | 63°F | 26% | 20% |
| August 31 | 81°F | 61°F | 26% | 19% |
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 | 83°F | 65°F | 27% | 20% | 14 h 20 min |
| August 2 | 83°F | 65°F | 27% | 20% | 14 h 20 min |
| August 3 | 83°F | 65°F | 27% | 20% | 14 h 20 min |
| August 4 | 83°F | 65°F | 27% | 20% | 14 h 20 min |
| August 5 | 83°F | 65°F | 27% | 20% | 14 h 10 min |
| August 6 | 83°F | 65°F | 27% | 20% | 14 h 10 min |
| August 7 | 83°F | 65°F | 27% | 20% | 14 h 10 min |
| August 8 | 83°F | 65°F | 27% | 20% | 14 h 10 min |
| August 9 | 83°F | 65°F | 27% | 20% | 14 h 10 min |
| August 10 | 83°F | 65°F | 27% | 20% | 14 h |
| August 11 | 83°F | 64°F | 27% | 20% | 14 h |
| August 12 | 83°F | 64°F | 27% | 20% | 14 h |
| August 13 | 83°F | 64°F | 27% | 20% | 14 h |
| August 14 | 83°F | 64°F | 27% | 20% | 13 h 50 min |
| August 15 | 83°F | 64°F | 27% | 20% | 13 h 50 min |
| August 16 | 83°F | 64°F | 27% | 20% | 13 h 50 min |
| August 17 | 82°F | 64°F | 27% | 20% | 13 h 50 min |
| August 18 | 82°F | 64°F | 27% | 20% | 13 h 40 min |
| August 19 | 82°F | 63°F | 27% | 20% | 13 h 40 min |
| August 20 | 82°F | 63°F | 26% | 20% | 13 h 40 min |
| August 21 | 82°F | 63°F | 26% | 20% | 13 h 40 min |
| August 22 | 82°F | 63°F | 26% | 20% | 13 h 30 min |
| August 23 | 82°F | 63°F | 26% | 20% | 13 h 30 min |
| August 24 | 82°F | 62°F | 26% | 20% | 13 h 30 min |
| August 25 | 82°F | 62°F | 26% | 20% | 13 h 30 min |
| August 26 | 81°F | 62°F | 26% | 20% | 13 h 20 min |
| August 27 | 81°F | 62°F | 26% | 20% | 13 h 20 min |
| August 28 | 81°F | 61°F | 26% | 19% | 13 h 20 min |
| August 29 | 81°F | 61°F | 26% | 19% | 13 h 20 min |
| August 30 | 81°F | 61°F | 26% | 19% | 13 h 10 min |
| August 31 | 81°F | 61°F | 26% | 19% | 13 h 10 min |
- Normal high
- 82°FAugust average
- Normal low
- 63°FAugust average
- Precipitation
- 3.89 inmonth total
- Days with precipitation
- 90.01 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
- 22
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00113320; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Galesburg in August?
On a given August day the chance of 0.01 inch or more is 26% on average, highest around August 5 (27%). In all, 3.89 in falls on 9 days of a normal August, 1 of them with an inch or more.
In a normal August in Galesburg, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00113320.
What are the records for August in Galesburg?
The warmest August temperature on this station's record (since 1896) is 102°F, on August 18, 1936; the coldest is 41°F, on August 24, 1908. The wettest August brought 10.69 in (1977).
The August mean against the 1991-2020 normal of 72.8°F: 2021 74.8°F (+2.0), 2022 72.9°F (+0.1), 2023 72.5°F (−0.3), 2024 72.4°F (−0.4), 2025 72.3°F (−0.5), 2026 73.3°F (+0.5). 3 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 74.8°F | +2.0°F | 3.06 in |
| 2022 | 72.9°F | +0.1°F | 2.76 in |
| 2023 | 72.5°F | −0.3°F | 5.93 in |
| 2024 | 72.4°F | −0.4°F | 2.72 in |
| 2025 | 72.3°F | −0.5°F | 1.19 in |
| 2026 | 73.3°F | +0.5°F | 9.89 in |
Source: records: ACIS, station USC00113320; recent months: ACIS, station USC00113320. Records and recent months use complete months only.
How does August in Galesburg 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; Galesburg's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.