Effingham weather in August: Effingham, Illinois: normal highs, lows, rain and records for August
Effingham in August has a normal high of 87°F and a normal low of 64°F, a daily mean of 75°F, falling from 88°F on the 1st to 86°F by the 31st. Measurable precipitation falls on 8 days in a normal August, 3.19 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 18°C, 81 mm of precipitation in August.
- NOAA stationEffingham (3 mi SW)
- Station IDUSC00112687
- Location39.12°N 88.62°W
- Elevation625 ft (191 m)
- From the center4 miles
- Population12,434
- Jan 37° 20°
- Feb 43° 23°
- Mar 54° 32°
- Apr 66° 42°
- May 76° 54°
- Jun 85° 63°
- Jul 89° 66°
- Aug 87° 64°
- Sep 81° 56°
- Oct 69° 44°
- Nov 54° 34°
- Dec 42° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Effingham in August?
The normal high is 87°F and the normal low 64°F, for a daily mean of 75.4°F. August is 1.8°F cooler than July and 7.0°F warmer than September. August is the 2nd warmest month of the year in Effingham and the 8th wettest. Across the month the normal high falls 2°F, from 88°F on August 1 to 86°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 73°F and 78°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 26%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 88°F | 65°F | 26% | 18% |
| August 8 | 88°F | 65°F | 26% | 17% |
| August 15 | 88°F | 64°F | 26% | 17% |
| August 22 | 87°F | 63°F | 26% | 17% |
| August 31 | 86°F | 61°F | 26% | 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 | 88°F | 65°F | 26% | 18% | 14 h 10 min |
| August 2 | 88°F | 65°F | 26% | 18% | 14 h 10 min |
| August 3 | 88°F | 65°F | 26% | 18% | 14 h 10 min |
| August 4 | 88°F | 65°F | 26% | 18% | 14 h 10 min |
| August 5 | 88°F | 65°F | 26% | 18% | 14 h 10 min |
| August 6 | 88°F | 65°F | 26% | 17% | 14 h |
| August 7 | 88°F | 65°F | 26% | 17% | 14 h |
| August 8 | 88°F | 65°F | 26% | 17% | 14 h |
| August 9 | 88°F | 65°F | 26% | 17% | 14 h |
| August 10 | 88°F | 65°F | 26% | 17% | 14 h |
| August 11 | 88°F | 65°F | 26% | 17% | 13 h 50 min |
| August 12 | 88°F | 65°F | 26% | 17% | 13 h 50 min |
| August 13 | 88°F | 64°F | 26% | 17% | 13 h 50 min |
| August 14 | 88°F | 64°F | 26% | 17% | 13 h 50 min |
| August 15 | 88°F | 64°F | 26% | 17% | 13 h 40 min |
| August 16 | 87°F | 64°F | 26% | 17% | 13 h 40 min |
| August 17 | 87°F | 64°F | 26% | 17% | 13 h 40 min |
| August 18 | 87°F | 64°F | 26% | 17% | 13 h 40 min |
| August 19 | 87°F | 64°F | 26% | 17% | 13 h 40 min |
| August 20 | 87°F | 63°F | 26% | 17% | 13 h 30 min |
| August 21 | 87°F | 63°F | 26% | 17% | 13 h 30 min |
| August 22 | 87°F | 63°F | 26% | 17% | 13 h 30 min |
| August 23 | 87°F | 63°F | 26% | 17% | 13 h 30 min |
| August 24 | 87°F | 63°F | 25% | 17% | 13 h 20 min |
| August 25 | 87°F | 62°F | 25% | 17% | 13 h 20 min |
| August 26 | 86°F | 62°F | 25% | 17% | 13 h 20 min |
| August 27 | 86°F | 62°F | 25% | 17% | 13 h 20 min |
| August 28 | 86°F | 62°F | 25% | 17% | 13 h 10 min |
| August 29 | 86°F | 62°F | 25% | 17% | 13 h 10 min |
| August 30 | 86°F | 61°F | 26% | 17% | 13 h 10 min |
| August 31 | 86°F | 61°F | 26% | 17% | 13 h 10 min |
- Normal high
- 87°FAugust average
- Normal low
- 64°FAugust average
- Precipitation
- 3.19 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 10
- Daylight
- 14 h 10 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 28
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00112687; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Effingham in August?
On a given August day the chance of 0.01 inch or more is 26% on average, highest around August 1 (26%). In all, 3.19 in falls on 8 days of a normal August, 1 of them with an inch or more.
In a normal August in Effingham, 10 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00112687.
What are the records for August in Effingham?
The warmest August temperature on this station's record (since 1892) is 110°F, on August 4, 1918; the coldest is 39°F, on August 31, 1915. The wettest August brought 10.25 in (1915).
Source: records: ACIS, station USC00112687. Records and recent months use complete months only.
How does August in Effingham 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; Effingham's is 87°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.