Fond du Lac weather in September: Fond du Lac, Wisconsin: normal highs, lows, rain and records for September
Fond du Lac in September has a normal high of 73°F and a normal low of 51°F, a daily mean of 62°F, falling from 77°F on the 1st to 67°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 2.86 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 11°C, 73 mm of precipitation in September.
- NOAA stationFond Du Lac County Airport
- Station IDUSW00004840
- Location43.77°N 88.49°W
- Elevation809 ft (247 m)
- From the center2 miles
- Population44,469
- Jan 27° 11°
- Feb 30° 14°
- Mar 42° 24°
- Apr 56° 35°
- May 68° 47°
- Jun 78° 57°
- Jul 82° 61°
- Aug 80° 59°
- Sep 73° 51°
- Oct 59° 40°
- Nov 45° 29°
- Dec 32° 18°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Fond du Lac in September?
The normal high is 73°F and the normal low 51°F, for a daily mean of 61.9°F. September is 7.5°F cooler than August and 12.4°F warmer than October. September is the 4th warmest month of the year in Fond du Lac and the 5th wettest. Across the month the normal high falls 10°F, from 77°F on September 1 to 67°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 59°F and 65°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 34%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 77°F | 56°F | 31% | 19% |
| September 8 | 75°F | 54°F | 31% | 19% |
| September 15 | 73°F | 52°F | 31% | 19% |
| September 22 | 70°F | 49°F | 33% | 19% |
| September 30 | 67°F | 46°F | 34% | 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 | 56°F | 31% | 19% | 13 h 20 min |
| September 2 | 77°F | 56°F | 31% | 19% | 13 h 10 min |
| September 3 | 77°F | 56°F | 31% | 19% | 13 h 10 min |
| September 4 | 76°F | 55°F | 31% | 19% | 13 h 10 min |
| September 5 | 76°F | 55°F | 31% | 19% | 13 h |
| September 6 | 76°F | 55°F | 31% | 19% | 13 h |
| September 7 | 76°F | 54°F | 31% | 19% | 13 h |
| September 8 | 75°F | 54°F | 31% | 19% | 13 h |
| September 9 | 75°F | 54°F | 31% | 19% | 12 h 50 min |
| September 10 | 75°F | 53°F | 31% | 19% | 12 h 50 min |
| September 11 | 74°F | 53°F | 31% | 19% | 12 h 50 min |
| September 12 | 74°F | 53°F | 31% | 19% | 12 h 40 min |
| September 13 | 74°F | 52°F | 31% | 19% | 12 h 40 min |
| September 14 | 74°F | 52°F | 31% | 19% | 12 h 40 min |
| September 15 | 73°F | 52°F | 31% | 19% | 12 h 30 min |
| September 16 | 73°F | 51°F | 32% | 19% | 12 h 30 min |
| September 17 | 72°F | 51°F | 32% | 19% | 12 h 30 min |
| September 18 | 72°F | 50°F | 32% | 19% | 12 h 30 min |
| September 19 | 72°F | 50°F | 32% | 19% | 12 h 20 min |
| September 20 | 71°F | 50°F | 32% | 19% | 12 h 20 min |
| September 21 | 71°F | 49°F | 33% | 19% | 12 h 20 min |
| September 22 | 70°F | 49°F | 33% | 19% | 12 h 10 min |
| September 23 | 70°F | 49°F | 33% | 19% | 12 h 10 min |
| September 24 | 70°F | 48°F | 33% | 19% | 12 h 10 min |
| September 25 | 69°F | 48°F | 33% | 19% | 12 h 10 min |
| September 26 | 69°F | 47°F | 33% | 19% | 12 h |
| September 27 | 68°F | 47°F | 34% | 19% | 12 h |
| September 28 | 68°F | 47°F | 34% | 19% | 12 h |
| September 29 | 67°F | 46°F | 34% | 19% | 11 h 50 min |
| September 30 | 67°F | 46°F | 34% | 19% | 11 h 50 min |
- Normal high
- 73°FSeptember average
- Normal low
- 51°FSeptember average
- Precipitation
- 2.86 inmonth total
- Days with precipitation
- 90.01 inch or more
- 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
- 8
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00004840; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Fond du Lac in September?
On a given September day the chance of 0.01 inch or more is 32% on average, highest around September 30 (34%). In all, 2.86 in falls on 9 days of a normal September, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00004840.
What are the records for September in Fond du Lac?
The warmest September temperature on this station's record (since 1996) is 95°F, on September 3, 2023; the coldest is 31°F, on September 28, 2012. The wettest September brought 5.59 in (2016).
The September mean against the 1991-2020 normal of 61.9°F: 2021 66.4°F (+4.5), 2022 62.6°F (+0.7), 2023 66.1°F (+4.2), 2024 64.4°F (+2.5), 2025 63.4°F (+1.5), 2026 62.9°F (+1.0). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 66.4°F | +4.5°F | 2.04 in |
| 2022 | 62.6°F | +0.7°F | 3.75 in |
| 2023 | 66.1°F | +4.2°F | 2.46 in |
| 2024 | 64.4°F | +2.5°F | 0.89 in |
| 2025 | 63.4°F | +1.5°F | 1.26 in |
| 2026 | 62.9°F | +1.0°F | 5.01 in |
Source: records: ACIS, station USW00004840; recent months: ACIS, station USW00004840. Records and recent months use complete months only.
How does September in Fond du Lac 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; Fond du Lac's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Fond du Lac in August80°F by day, 59°F at night
- Fond du Lac in October59°F by day, 40°F at night
- Fond du Lac 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