Racine weather in September: Racine, Wisconsin: normal highs, lows, rain and records for September
Racine in September has a normal high of 73°F and a normal low of 55°F, a daily mean of 64°F, falling from 77°F on the 1st to 68°F by the 30th. Measurable precipitation falls on 11 days in a normal September, 3.23 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 13°C, 82 mm of precipitation in September.
- NOAA stationRacine Batten Airport
- Station IDUSW00094818
- Location42.76°N 87.81°W
- Elevation674 ft (205 m)
- From the center2 miles
- Population78,057
- Jan 31° 16°
- Feb 34° 19°
- Mar 43° 28°
- Apr 54° 37°
- May 66° 46°
- Jun 76° 57°
- Jul 81° 63°
- Aug 80° 63°
- Sep 73° 55°
- Oct 61° 43°
- Nov 47° 32°
- Dec 36° 22°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Racine in September?
The normal high is 73°F and the normal low 55°F, for a daily mean of 64.0°F. September is 7.1°F cooler than August and 11.9°F warmer than October. September is the 4th warmest month of the year in Racine and the 5th wettest. Across the month the normal high falls 9°F, from 77°F on September 1 to 68°F on September 30. From one year to the next September's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 62°F and 66°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 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 77°F | 60°F | 33% | 19% |
| September 8 | 75°F | 58°F | 34% | 19% |
| September 15 | 73°F | 56°F | 35% | 19% |
| September 22 | 71°F | 53°F | 35% | 19% |
| September 30 | 68°F | 50°F | 36% | 19% |
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 | 77°F | 60°F | 33% | 19% | 13 h 10 min |
| September 2 | 77°F | 60°F | 34% | 19% | 13 h 10 min |
| September 3 | 77°F | 60°F | 34% | 19% | 13 h 10 min |
| September 4 | 76°F | 59°F | 34% | 19% | 13 h 10 min |
| September 5 | 76°F | 59°F | 34% | 19% | 13 h |
| September 6 | 76°F | 59°F | 34% | 19% | 13 h |
| September 7 | 76°F | 58°F | 34% | 19% | 13 h |
| September 8 | 75°F | 58°F | 34% | 19% | 12 h 50 min |
| September 9 | 75°F | 58°F | 34% | 19% | 12 h 50 min |
| September 10 | 75°F | 57°F | 35% | 19% | 12 h 50 min |
| September 11 | 75°F | 57°F | 35% | 19% | 12 h 50 min |
| September 12 | 74°F | 57°F | 35% | 19% | 12 h 40 min |
| September 13 | 74°F | 56°F | 35% | 19% | 12 h 40 min |
| September 14 | 74°F | 56°F | 35% | 19% | 12 h 40 min |
| September 15 | 73°F | 56°F | 35% | 19% | 12 h 30 min |
| September 16 | 73°F | 55°F | 35% | 18% | 12 h 30 min |
| September 17 | 73°F | 55°F | 35% | 18% | 12 h 30 min |
| September 18 | 72°F | 54°F | 35% | 19% | 12 h 30 min |
| September 19 | 72°F | 54°F | 35% | 19% | 12 h 20 min |
| September 20 | 72°F | 54°F | 35% | 19% | 12 h 20 min |
| September 21 | 71°F | 53°F | 35% | 19% | 12 h 20 min |
| September 22 | 71°F | 53°F | 35% | 19% | 12 h 10 min |
| September 23 | 70°F | 52°F | 35% | 19% | 12 h 10 min |
| September 24 | 70°F | 52°F | 36% | 19% | 12 h 10 min |
| September 25 | 70°F | 52°F | 36% | 19% | 12 h 10 min |
| September 26 | 69°F | 51°F | 36% | 19% | 12 h |
| September 27 | 69°F | 51°F | 36% | 19% | 12 h |
| September 28 | 68°F | 50°F | 36% | 19% | 12 h |
| September 29 | 68°F | 50°F | 36% | 19% | 11 h 50 min |
| September 30 | 68°F | 50°F | 36% | 19% | 11 h 50 min |
- Normal high
- 73°FSeptember average
- Normal low
- 55°FSeptember average
- Precipitation
- 3.23 inmonth total
- Days with precipitation
- 110.01 inch or more
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 20
- Days at 80°F or more
- 7
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094818; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Racine in September?
On a given September day the chance of 0.01 inch or more is 35% on average, highest around September 28 (36%). In all, 3.23 in falls on 11 days of a normal September, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094818.
What are the records for September in Racine?
The warmest September temperature on this station's record (since 1998) is 96°F, on September 10, 2013; the coldest is 37°F, on September 30, 2003. The wettest September brought 9.91 in (2022).
The September mean against the 1991-2020 normal of 64.0°F: 2021 67.2°F (+3.2), 2022 64.8°F (+0.8), 2023 67.0°F (+3.0), 2024 67.9°F (+3.9), 2025 64.7°F (+0.7). 5 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 67.2°F | +3.2°F | 0.95 in |
| 2022 | 64.8°F | +0.8°F | 9.91 in |
| 2023 | 67.0°F | +3.0°F | 4.52 in |
| 2024 | 67.9°F | +3.9°F | 2.10 in |
| 2025 | 64.7°F | +0.7°F | 2.14 in |
Source: records: ACIS, station USW00094818; recent months: ACIS, station USW00094818. Records and recent months use complete months only.
How does September in Racine compare across Wisconsin?
Across the 165 places PlainClimate covers in Wisconsin, September normal highs run from 64°F in Laona to 77°F in West Allis; Racine's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.