Evansville weather in September: Evansville, Indiana: normal highs, lows, rain and records for September
Evansville in September has a normal high of 82°F and a normal low of 59°F, a daily mean of 70°F, falling from 86°F on the 1st to 77°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 3.31 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 15°C, 84 mm of precipitation in September.
- NOAA stationEvansville Regional Airport
- Station IDUSW00093817
- Location38.04°N 87.52°W
- Elevation400 ft (122 m)
- Population115,395
- Jan 42° 26°
- Feb 47° 28°
- Mar 57° 36°
- Apr 68° 46°
- May 77° 57°
- Jun 86° 65°
- Jul 89° 69°
- Aug 88° 67°
- Sep 82° 59°
- Oct 70° 47°
- Nov 56° 37°
- Dec 46° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Evansville in September?
The normal high is 82°F and the normal low 59°F, for a daily mean of 70.3°F. September is 7.0°F cooler than August and 11.7°F warmer than October. September is the 4th warmest month of the year in Evansville and the 10th wettest. Across the month the normal high falls 9°F, from 86°F on September 1 to 77°F on September 30. From one year to the next September's mean temperature typically moves about 2.8°F either way (NOAA's standard deviation), so roughly two Septembers 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 26%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 86°F | 64°F | 22% | 15% |
| September 8 | 84°F | 62°F | 23% | 15% |
| September 15 | 82°F | 59°F | 24% | 15% |
| September 22 | 80°F | 56°F | 25% | 16% |
| September 30 | 77°F | 53°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 | 86°F | 64°F | 22% | 15% | 13 h |
| September 2 | 86°F | 63°F | 22% | 15% | 13 h |
| September 3 | 86°F | 63°F | 22% | 15% | 13 h |
| September 4 | 85°F | 63°F | 22% | 15% | 13 h |
| September 5 | 85°F | 63°F | 23% | 15% | 12 h 50 min |
| September 6 | 85°F | 62°F | 23% | 15% | 12 h 50 min |
| September 7 | 85°F | 62°F | 23% | 15% | 12 h 50 min |
| September 8 | 84°F | 62°F | 23% | 15% | 12 h 50 min |
| September 9 | 84°F | 61°F | 23% | 15% | 12 h 40 min |
| September 10 | 84°F | 61°F | 23% | 15% | 12 h 40 min |
| September 11 | 84°F | 60°F | 23% | 15% | 12 h 40 min |
| September 12 | 83°F | 60°F | 23% | 15% | 12 h 40 min |
| September 13 | 83°F | 60°F | 23% | 15% | 12 h 30 min |
| September 14 | 83°F | 59°F | 24% | 15% | 12 h 30 min |
| September 15 | 82°F | 59°F | 24% | 15% | 12 h 30 min |
| September 16 | 82°F | 59°F | 24% | 15% | 12 h 30 min |
| September 17 | 82°F | 58°F | 24% | 16% | 12 h 20 min |
| September 18 | 81°F | 58°F | 24% | 16% | 12 h 20 min |
| September 19 | 81°F | 57°F | 25% | 16% | 12 h 20 min |
| September 20 | 81°F | 57°F | 25% | 16% | 12 h 20 min |
| September 21 | 80°F | 57°F | 25% | 16% | 12 h 10 min |
| September 22 | 80°F | 56°F | 25% | 16% | 12 h 10 min |
| September 23 | 80°F | 56°F | 25% | 16% | 12 h 10 min |
| September 24 | 79°F | 55°F | 25% | 16% | 12 h 10 min |
| September 25 | 79°F | 55°F | 25% | 16% | 12 h 10 min |
| September 26 | 78°F | 55°F | 25% | 16% | 12 h |
| September 27 | 78°F | 54°F | 26% | 16% | 12 h |
| September 28 | 78°F | 54°F | 26% | 16% | 12 h |
| September 29 | 77°F | 53°F | 26% | 16% | 12 h |
| September 30 | 77°F | 53°F | 26% | 16% | 11 h 50 min |
- Normal high
- 82°FSeptember average
- Normal low
- 59°FSeptember average
- Precipitation
- 3.31 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 6
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 28
- Days at 80°F or more
- 19
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093817; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Evansville in September?
On a given September day the chance of 0.01 inch or more is 24% on average, highest around September 27 (26%). In all, 3.31 in falls on 8 days of a normal September, 1 of them with an inch or more.
In a normal September in Evansville, 6 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093817.
How humid and windy is Evansville in September?
At 3 p.m. the normal temperature is 75°F with 44% relative humidity and a dew point of 52°F; at 6 a.m. it is 55°F with 88% humidity. The wind averages 5.6 mph, most often from the west in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 55°F | 52°F | 88% | 3.6 mph | 66% |
| 9 a.m. | 66°F | 54°F | 65% | 7.0 mph | 74% |
| noon | 73°F | 53°F | 49% | 9.0 mph | 61% |
| 3 p.m. | 75°F | 52°F | 44% | 9.0 mph | 72% |
| 6 p.m. | 68°F | 53°F | 60% | 4.5 mph | 73% |
| 9 p.m. | 61°F | 54°F | 76% | 3.9 mph | 78% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093817. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Evansville?
The warmest September temperature on Evansville's official record (since 1897) is 104°F, on September 6, 1925; the coldest is 31°F, on September 29, 1942. The wettest September brought 9.89 in (1945).
The September mean against the 1991-2020 normal of 70.3°F: 2021 71.3°F (+1.0), 2022 70.3°F (at normal), 2023 71.8°F (+1.5), 2024 73.5°F (+3.2), 2025 72.2°F (+1.9), 2026 76.6°F (+6.3). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.3°F | +1.0°F | 4.82 in |
| 2022 | 70.3°F | at normal | 6.13 in |
| 2023 | 71.8°F | +1.5°F | 1.01 in |
| 2024 | 73.5°F | +3.2°F | 4.45 in |
| 2025 | 72.2°F | +1.9°F | 4.50 in |
| 2026 | 76.6°F | +6.3°F | 2.21 in |
Source: records: ACIS, NWS threaded record EVVthr; recent months: ACIS, station USW00093817. Records and recent months use complete months only.
How does September in Evansville compare across Indiana?
Across the 99 places PlainClimate covers in Indiana, September normal highs run from 74°F in Angola to 82°F in English; Evansville's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.