Mundelein weather in August: Mundelein, Illinois: normal highs, lows, rain and records for August
Mundelein in August has a normal high of 81°F and a normal low of 61°F, a daily mean of 71°F, falling from 82°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 4.19 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 16°C, 106 mm of precipitation in August.
- NOAA stationMundelein (4 mi WSW)
- Station IDUSC00115961
- Location42.26°N 88.08°W
- Elevation840 ft (256 m)
- From the center3 miles
- Population32,641
- Jan 29° 14°
- Feb 33° 16°
- Mar 44° 26°
- Apr 57° 36°
- May 68° 47°
- Jun 78° 58°
- Jul 82° 62°
- Aug 81° 61°
- Sep 74° 53°
- Oct 61° 42°
- Nov 47° 30°
- Dec 34° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Mundelein in August?
The normal high is 81°F and the normal low 61°F, for a daily mean of 70.8°F. August is 1.4°F cooler than July and 7.5°F warmer than September. August is the 2nd warmest month of the year in Mundelein and the 3rd wettest. Across the month the normal high falls 3°F, from 82°F on August 1 to 79°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 68°F and 73°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 31%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 82°F | 62°F | 31% | 18% |
| August 8 | 81°F | 62°F | 31% | 18% |
| August 15 | 81°F | 61°F | 31% | 19% |
| August 22 | 80°F | 60°F | 31% | 19% |
| August 31 | 79°F | 58°F | 31% | 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 | 82°F | 62°F | 31% | 18% | 14 h 30 min |
| August 2 | 82°F | 62°F | 31% | 18% | 14 h 30 min |
| August 3 | 82°F | 62°F | 31% | 18% | 14 h 20 min |
| August 4 | 82°F | 62°F | 31% | 18% | 14 h 20 min |
| August 5 | 82°F | 62°F | 31% | 18% | 14 h 20 min |
| August 6 | 82°F | 62°F | 31% | 18% | 14 h 20 min |
| August 7 | 82°F | 62°F | 31% | 18% | 14 h 20 min |
| August 8 | 81°F | 62°F | 31% | 18% | 14 h 10 min |
| August 9 | 81°F | 62°F | 31% | 18% | 14 h 10 min |
| August 10 | 81°F | 62°F | 31% | 18% | 14 h 10 min |
| August 11 | 81°F | 62°F | 31% | 18% | 14 h 10 min |
| August 12 | 81°F | 62°F | 31% | 19% | 14 h |
| August 13 | 81°F | 62°F | 31% | 19% | 14 h |
| August 14 | 81°F | 61°F | 31% | 19% | 14 h |
| August 15 | 81°F | 61°F | 31% | 19% | 14 h |
| August 16 | 81°F | 61°F | 31% | 19% | 13 h 50 min |
| August 17 | 81°F | 61°F | 31% | 19% | 13 h 50 min |
| August 18 | 81°F | 61°F | 31% | 19% | 13 h 50 min |
| August 19 | 81°F | 61°F | 31% | 19% | 13 h 50 min |
| August 20 | 81°F | 61°F | 31% | 19% | 13 h 40 min |
| August 21 | 80°F | 61°F | 31% | 19% | 13 h 40 min |
| August 22 | 80°F | 60°F | 31% | 19% | 13 h 40 min |
| August 23 | 80°F | 60°F | 31% | 19% | 13 h 40 min |
| August 24 | 80°F | 60°F | 31% | 19% | 13 h 30 min |
| August 25 | 80°F | 60°F | 31% | 19% | 13 h 30 min |
| August 26 | 80°F | 60°F | 31% | 19% | 13 h 30 min |
| August 27 | 80°F | 59°F | 31% | 19% | 13 h 30 min |
| August 28 | 79°F | 59°F | 31% | 19% | 13 h 20 min |
| August 29 | 79°F | 59°F | 31% | 19% | 13 h 20 min |
| August 30 | 79°F | 59°F | 31% | 19% | 13 h 20 min |
| August 31 | 79°F | 58°F | 31% | 19% | 13 h 10 min |
- Normal high
- 81°FAugust average
- Normal low
- 61°FAugust average
- Precipitation
- 4.19 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 14 h 30 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 19
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00115961; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Mundelein in August?
On a given August day the chance of 0.01 inch or more is 31% on average, highest around August 17 (31%). In all, 4.19 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in Mundelein, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00115961.
What are the records for August in Mundelein?
The warmest August temperature on this station's record (since 1999) is 97°F, on August 22, 2003; the coldest is 45°F, on August 15, 2004. The wettest August brought 12.48 in (2007).
The August mean against the 1991-2020 normal of 70.8°F: 2021 73.1°F (+2.3), 2022 70.0°F (−0.8), 2023 70.4°F (−0.4). 1 of 3 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 73.1°F | +2.3°F | 3.36 in |
| 2022 | 70.0°F | −0.8°F | 4.23 in |
| 2023 | 70.4°F | −0.4°F | 1.79 in |
Source: records: ACIS, station USC00115961; recent months: ACIS, station USC00115961. Records and recent months use complete months only.
How does August in Mundelein 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; Mundelein's is 81°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.