Effingham weather in September: Effingham, Illinois: normal highs, lows, rain and records for September
Effingham in September has a normal high of 81°F and a normal low of 56°F, a daily mean of 68°F, falling from 85°F on the 1st to 76°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 2.89 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 13°C, 73 mm of precipitation in September.
- 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 September?
The normal high is 81°F and the normal low 56°F, for a daily mean of 68.4°F. September is 7.0°F cooler than August and 12.0°F warmer than October. September is the 4th warmest month of the year in Effingham and the 10th wettest. Across the month the normal high falls 9°F, from 85°F on September 1 to 76°F on September 30. From one year to the next September's mean temperature typically moves about 3.0°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 65°F and 71°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 |
|---|---|---|---|---|
| September 1 | 85°F | 61°F | 26% | 17% |
| September 8 | 84°F | 58°F | 25% | 17% |
| September 15 | 82°F | 56°F | 25% | 16% |
| September 22 | 79°F | 53°F | 26% | 16% |
| September 30 | 76°F | 50°F | 26% | 16% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 85°F | 61°F | 26% | 17% | 13 h 10 min |
| September 2 | 85°F | 60°F | 26% | 17% | 13 h |
| September 3 | 85°F | 60°F | 25% | 17% | 13 h |
| September 4 | 85°F | 60°F | 25% | 17% | 13 h |
| September 5 | 84°F | 59°F | 25% | 17% | 13 h |
| September 6 | 84°F | 59°F | 25% | 17% | 12 h 50 min |
| September 7 | 84°F | 59°F | 25% | 17% | 12 h 50 min |
| September 8 | 84°F | 58°F | 25% | 17% | 12 h 50 min |
| September 9 | 83°F | 58°F | 26% | 17% | 12 h 50 min |
| September 10 | 83°F | 58°F | 25% | 17% | 12 h 40 min |
| September 11 | 83°F | 57°F | 25% | 17% | 12 h 40 min |
| September 12 | 83°F | 57°F | 25% | 17% | 12 h 40 min |
| September 13 | 82°F | 57°F | 25% | 16% | 12 h 40 min |
| September 14 | 82°F | 56°F | 25% | 16% | 12 h 30 min |
| September 15 | 82°F | 56°F | 25% | 16% | 12 h 30 min |
| September 16 | 81°F | 55°F | 25% | 16% | 12 h 30 min |
| September 17 | 81°F | 55°F | 25% | 16% | 12 h 30 min |
| September 18 | 81°F | 55°F | 25% | 16% | 12 h 20 min |
| September 19 | 80°F | 54°F | 26% | 16% | 12 h 20 min |
| September 20 | 80°F | 54°F | 26% | 16% | 12 h 20 min |
| September 21 | 80°F | 53°F | 26% | 16% | 12 h 20 min |
| September 22 | 79°F | 53°F | 26% | 16% | 12 h 10 min |
| September 23 | 79°F | 53°F | 26% | 16% | 12 h 10 min |
| September 24 | 79°F | 52°F | 26% | 16% | 12 h 10 min |
| September 25 | 78°F | 52°F | 26% | 16% | 12 h 10 min |
| September 26 | 78°F | 51°F | 26% | 16% | 12 h |
| September 27 | 77°F | 51°F | 26% | 16% | 12 h |
| September 28 | 77°F | 51°F | 26% | 16% | 12 h |
| September 29 | 77°F | 50°F | 26% | 16% | 12 h |
| September 30 | 76°F | 50°F | 26% | 16% | 11 h 50 min |
- Normal high
- 81°FSeptember average
- Normal low
- 56°FSeptember average
- Precipitation
- 2.89 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 5
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 27
- Days at 80°F or more
- 17
- Sunshine
- 81%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 September?
On a given September day the chance of 0.01 inch or more is 26% on average, highest around September 26 (26%). In all, 2.89 in falls on 8 days of a normal September, 1 of them with an inch or more.
In a normal September in Effingham, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00112687.
What are the records for September in Effingham?
The warmest September temperature on this station's record (since 1892) is 105°F, on September 5, 1954; the coldest is 24°F, on September 30, 1899. The wettest September brought 13.64 in (1911).
Source: records: ACIS, station USC00112687. Records and recent months use complete months only.
How does September in Effingham compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, September normal highs run from 72°F in Barrington to 84°F in Anna; Effingham's is 81°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.