Kankakee weather in August: Kankakee, Illinois: normal highs, lows, rain and records for August
Kankakee in August has a normal high of 83°F and a normal low of 63°F, a daily mean of 73°F, falling from 84°F on the 1st to 82°F by the 31st. Measurable precipitation falls on 9 days in a normal August, 3.85 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 17°C, 98 mm of precipitation in August.
- NOAA stationKankakee Metro Wastewater
- Station IDUSC00114603
- Location41.13°N 87.89°W
- Elevation600 ft (183 m)
- Population23,535
- Jan 33° 16°
- Feb 37° 20°
- Mar 49° 29°
- Apr 61° 39°
- May 73° 51°
- Jun 82° 61°
- Jul 85° 65°
- Aug 83° 63°
- Sep 78° 55°
- Oct 65° 43°
- Nov 50° 32°
- Dec 38° 22°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Kankakee in August?
The normal high is 83°F and the normal low 63°F, for a daily mean of 73.1°F. August is 1.7°F cooler than July and 6.6°F warmer than September. August is the 2nd warmest month of the year in Kankakee and the 5th wettest. Across the month the normal high falls 2°F, from 84°F on August 1 to 82°F on August 31. From one year to the next August's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 71°F and 76°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 28%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 84°F | 64°F | 28% | 18% |
| August 8 | 84°F | 64°F | 27% | 18% |
| August 15 | 83°F | 63°F | 27% | 18% |
| August 22 | 83°F | 63°F | 27% | 18% |
| August 31 | 82°F | 61°F | 26% | 18% |
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 | 28% | 18% | 14 h 20 min |
| August 2 | 84°F | 64°F | 28% | 18% | 14 h 20 min |
| August 3 | 84°F | 64°F | 28% | 18% | 14 h 20 min |
| August 4 | 84°F | 64°F | 28% | 18% | 14 h 20 min |
| August 5 | 84°F | 64°F | 28% | 18% | 14 h 20 min |
| August 6 | 84°F | 64°F | 27% | 18% | 14 h 10 min |
| August 7 | 84°F | 64°F | 27% | 18% | 14 h 10 min |
| August 8 | 84°F | 64°F | 27% | 18% | 14 h 10 min |
| August 9 | 84°F | 64°F | 27% | 18% | 14 h 10 min |
| August 10 | 84°F | 64°F | 27% | 18% | 14 h |
| August 11 | 84°F | 64°F | 27% | 18% | 14 h |
| August 12 | 84°F | 64°F | 27% | 18% | 14 h |
| August 13 | 83°F | 64°F | 27% | 18% | 14 h |
| August 14 | 83°F | 64°F | 27% | 18% | 13 h 50 min |
| August 15 | 83°F | 63°F | 27% | 18% | 13 h 50 min |
| August 16 | 83°F | 63°F | 27% | 18% | 13 h 50 min |
| August 17 | 83°F | 63°F | 27% | 18% | 13 h 50 min |
| August 18 | 83°F | 63°F | 27% | 18% | 13 h 50 min |
| August 19 | 83°F | 63°F | 27% | 18% | 13 h 40 min |
| August 20 | 83°F | 63°F | 27% | 18% | 13 h 40 min |
| August 21 | 83°F | 63°F | 27% | 18% | 13 h 40 min |
| August 22 | 83°F | 63°F | 27% | 18% | 13 h 40 min |
| August 23 | 83°F | 62°F | 27% | 18% | 13 h 30 min |
| August 24 | 83°F | 62°F | 27% | 18% | 13 h 30 min |
| August 25 | 83°F | 62°F | 27% | 18% | 13 h 30 min |
| August 26 | 83°F | 62°F | 26% | 18% | 13 h 30 min |
| August 27 | 83°F | 62°F | 26% | 18% | 13 h 20 min |
| August 28 | 82°F | 61°F | 26% | 18% | 13 h 20 min |
| August 29 | 82°F | 61°F | 26% | 18% | 13 h 20 min |
| August 30 | 82°F | 61°F | 26% | 18% | 13 h 10 min |
| August 31 | 82°F | 61°F | 26% | 18% | 13 h 10 min |
- Normal high
- 83°FAugust average
- Normal low
- 63°FAugust average
- Precipitation
- 3.85 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 5
- 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
- 23
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00114603; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Kankakee in August?
On a given August day the chance of 0.01 inch or more is 27% on average, highest around August 1 (28%). In all, 3.85 in falls on 9 days of a normal August, 1 of them with an inch or more.
In a normal August in Kankakee, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00114603.
What are the records for August in Kankakee?
The August mean against the 1991-2020 normal of 73.1°F: 2021 75.4°F (+2.3), 2022 73.0°F (−0.1), 2023 72.1°F (−1.0), 2024 72.4°F (−0.7), 2025 71.9°F (−1.2), 2026 73.2°F (+0.1). 2 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.4°F | +2.3°F | 3.33 in |
| 2022 | 73.0°F | −0.1°F | 2.23 in |
| 2023 | 72.1°F | −1.0°F | 3.40 in |
| 2024 | 72.4°F | −0.7°F | 3.63 in |
| 2025 | 71.9°F | −1.2°F | 3.64 in |
| 2026 | 73.2°F | +0.1°F | 6.84 in |
Source: recent months: ACIS, station USC00114603. Records and recent months use complete months only.
How does August in Kankakee 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; Kankakee's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.