Wisconsin Dells weather in September: Wisconsin Dells, Wisconsin: normal highs, lows, rain and records for September
Wisconsin Dells in September has a normal high of 73°F and a normal low of 49°F, a daily mean of 61°F, falling from 78°F on the 1st to 67°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 3.84 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 9°C, 98 mm of precipitation in September.
- NOAA stationWisconsin Dells
- Station IDUSC00479319
- Location43.61°N 89.77°W
- Elevation835 ft (255 m)
- Population3,157
- Jan 26° 8°
- Feb 31° 11°
- Mar 43° 22°
- Apr 57° 33°
- May 69° 45°
- Jun 79° 56°
- Jul 83° 60°
- Aug 81° 57°
- Sep 73° 49°
- Oct 60° 37°
- Nov 44° 26°
- Dec 32° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Wisconsin Dells in September?
The normal high is 73°F and the normal low 49°F, for a daily mean of 60.9°F. September is 8.0°F cooler than August and 12.7°F warmer than October. September is the 4th warmest month of the year in Wisconsin Dells and the 6th wettest. Across the month the normal high falls 11°F, from 78°F on September 1 to 67°F on September 30. From one year to the next September's mean temperature typically moves about 2.9°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 58°F and 64°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 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 78°F | 54°F | 30% | 21% |
| September 8 | 76°F | 52°F | 31% | 21% |
| September 15 | 74°F | 49°F | 32% | 22% |
| September 22 | 71°F | 46°F | 32% | 21% |
| September 30 | 67°F | 43°F | 32% | 21% |
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 | 78°F | 54°F | 30% | 21% | 13 h 20 min |
| September 2 | 78°F | 54°F | 30% | 21% | 13 h 10 min |
| September 3 | 77°F | 53°F | 30% | 21% | 13 h 10 min |
| September 4 | 77°F | 53°F | 31% | 21% | 13 h 10 min |
| September 5 | 77°F | 53°F | 31% | 21% | 13 h |
| September 6 | 77°F | 52°F | 31% | 21% | 13 h |
| September 7 | 76°F | 52°F | 31% | 21% | 13 h |
| September 8 | 76°F | 52°F | 31% | 21% | 13 h |
| September 9 | 76°F | 51°F | 31% | 21% | 12 h 50 min |
| September 10 | 75°F | 51°F | 31% | 21% | 12 h 50 min |
| September 11 | 75°F | 51°F | 31% | 21% | 12 h 50 min |
| September 12 | 75°F | 50°F | 31% | 21% | 12 h 40 min |
| September 13 | 74°F | 50°F | 31% | 22% | 12 h 40 min |
| September 14 | 74°F | 49°F | 31% | 22% | 12 h 40 min |
| September 15 | 74°F | 49°F | 32% | 22% | 12 h 30 min |
| September 16 | 73°F | 49°F | 32% | 22% | 12 h 30 min |
| September 17 | 73°F | 48°F | 32% | 22% | 12 h 30 min |
| September 18 | 72°F | 48°F | 32% | 22% | 12 h 30 min |
| September 19 | 72°F | 47°F | 32% | 22% | 12 h 20 min |
| September 20 | 72°F | 47°F | 32% | 21% | 12 h 20 min |
| September 21 | 71°F | 47°F | 32% | 21% | 12 h 20 min |
| September 22 | 71°F | 46°F | 32% | 21% | 12 h 10 min |
| September 23 | 70°F | 46°F | 32% | 21% | 12 h 10 min |
| September 24 | 70°F | 45°F | 32% | 21% | 12 h 10 min |
| September 25 | 70°F | 45°F | 32% | 21% | 12 h 10 min |
| September 26 | 69°F | 44°F | 32% | 21% | 12 h |
| September 27 | 69°F | 44°F | 32% | 21% | 12 h |
| September 28 | 68°F | 44°F | 32% | 21% | 12 h |
| September 29 | 68°F | 43°F | 32% | 21% | 11 h 50 min |
| September 30 | 67°F | 43°F | 32% | 21% | 11 h 50 min |
- Normal high
- 73°FSeptember average
- Normal low
- 49°FSeptember average
- Precipitation
- 3.84 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 1
- Nights at 32°F or colder
- 1
- Daylight
- 13 h 20 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 20
- Days at 80°F or more
- 9
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00479319; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Wisconsin Dells in September?
On a given September day the chance of 0.01 inch or more is 31% on average, highest around September 19 (32%). In all, 3.84 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Wisconsin Dells, 1 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00479319.
What are the records for September in Wisconsin Dells?
The warmest September temperature on this station's record (since 1922) is 101°F, on September 7, 1922; the coldest is 24°F, on September 28, 1942. The wettest September brought 12.82 in (1965).
The September mean against the 1991-2020 normal of 60.9°F: 2021 61.6°F (+0.7), 2022 61.3°F (+0.4), 2023 64.9°F (+4.0), 2024 63.7°F (+2.8), 2025 62.5°F (+1.6). 5 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 61.6°F | +0.7°F | 1.65 in |
| 2022 | 61.3°F | +0.4°F | 3.35 in |
| 2023 | 64.9°F | +4.0°F | 1.96 in |
| 2024 | 63.7°F | +2.8°F | 2.45 in |
| 2025 | 62.5°F | +1.6°F | 2.41 in |
Source: records: ACIS, station USC00479319; recent months: ACIS, station USC00479319. Records and recent months use complete months only.
How does September in Wisconsin Dells 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; Wisconsin Dells's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Wisconsin Dells in August81°F by day, 57°F at night
- Wisconsin Dells in October60°F by day, 37°F at night
- Wisconsin Dells through the yearEvery month, frost dates, records and recent years
- Wisconsin in SeptemberThe statewide normal and the warmest and coolest places
- West Allis: Wisconsin's warmest Septembernormal high 77°F