Madison weather in September: Madison, Wisconsin: normal highs, lows, rain and records for September
Madison in September has a normal high of 73°F and a normal low of 51°F, a daily mean of 62°F, falling from 78°F on the 1st to 67°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 3.43 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 11°C, 87 mm of precipitation in September.
- NOAA stationMadison Dane County Regional Airport
- Station IDUSW00014837
- Location43.14°N 89.35°W
- Elevation866 ft (264 m)
- From the center6 miles
- Population285,300
- Jan 27° 12°
- Feb 31° 15°
- Mar 44° 25°
- Apr 57° 36°
- May 69° 47°
- Jun 79° 57°
- Jul 82° 62°
- Aug 80° 60°
- Sep 73° 51°
- Oct 60° 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 Madison in September?
The normal high is 73°F and the normal low 51°F, for a daily mean of 62.0°F. September is 7.7°F cooler than August and 12.3°F warmer than October. September is the 4th warmest month of the year in Madison 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 3.0°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 33%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 78°F | 56°F | 29% | 19% |
| September 8 | 76°F | 54°F | 30% | 19% |
| September 15 | 73°F | 51°F | 31% | 19% |
| September 22 | 71°F | 49°F | 32% | 19% |
| September 30 | 67°F | 45°F | 33% | 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 | 78°F | 56°F | 29% | 19% | 13 h 10 min |
| September 2 | 77°F | 56°F | 29% | 19% | 13 h 10 min |
| September 3 | 77°F | 56°F | 30% | 19% | 13 h 10 min |
| September 4 | 77°F | 55°F | 30% | 19% | 13 h 10 min |
| September 5 | 77°F | 55°F | 30% | 19% | 13 h |
| September 6 | 76°F | 55°F | 30% | 19% | 13 h |
| September 7 | 76°F | 54°F | 30% | 19% | 13 h |
| September 8 | 76°F | 54°F | 30% | 19% | 12 h 50 min |
| September 9 | 76°F | 54°F | 30% | 19% | 12 h 50 min |
| September 10 | 75°F | 53°F | 30% | 19% | 12 h 50 min |
| September 11 | 75°F | 53°F | 31% | 19% | 12 h 50 min |
| September 12 | 75°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 | 51°F | 31% | 19% | 12 h 30 min |
| September 16 | 73°F | 51°F | 31% | 19% | 12 h 30 min |
| September 17 | 73°F | 51°F | 31% | 19% | 12 h 30 min |
| September 18 | 72°F | 50°F | 31% | 19% | 12 h 30 min |
| September 19 | 72°F | 50°F | 32% | 19% | 12 h 20 min |
| September 20 | 72°F | 49°F | 32% | 19% | 12 h 20 min |
| September 21 | 71°F | 49°F | 32% | 19% | 12 h 20 min |
| September 22 | 71°F | 49°F | 32% | 19% | 12 h 10 min |
| September 23 | 70°F | 48°F | 32% | 19% | 12 h 10 min |
| September 24 | 70°F | 48°F | 32% | 19% | 12 h 10 min |
| September 25 | 69°F | 47°F | 32% | 19% | 12 h 10 min |
| September 26 | 69°F | 47°F | 32% | 19% | 12 h |
| September 27 | 68°F | 47°F | 32% | 19% | 12 h |
| September 28 | 68°F | 46°F | 32% | 19% | 12 h |
| September 29 | 68°F | 46°F | 33% | 19% | 11 h 50 min |
| September 30 | 67°F | 45°F | 33% | 19% | 11 h 50 min |
- Normal high
- 73°FSeptember average
- Normal low
- 51°FSeptember average
- Precipitation
- 3.43 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 10 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 USW00014837; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Madison in September?
On a given September day the chance of 0.01 inch or more is 31% on average, highest around September 30 (33%). In all, 3.43 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Madison, 1 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014837.
How humid and windy is Madison in September?
At 3 p.m. the normal temperature is 65°F with 51% relative humidity and a dew point of 47°F; at 6 a.m. it is 49°F with 87% humidity. The wind averages 7.1 mph, most often from the southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 49°F | 45°F | 87% | 5.3 mph | 49% |
| 9 a.m. | 57°F | 48°F | 71% | 8.6 mph | 54% |
| noon | 63°F | 47°F | 56% | 10.1 mph | 41% |
| 3 p.m. | 65°F | 47°F | 51% | 9.7 mph | 51% |
| 6 p.m. | 59°F | 47°F | 66% | 6.2 mph | 51% |
| 9 p.m. | 54°F | 47°F | 76% | 5.9 mph | 62% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014837. 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 Madison?
The warmest September temperature on Madison's official record (since 1869) is 99°F, on September 1, 1953; the coldest is 25°F, on September 29, 1949. The wettest September brought 10.69 in (1915).
The September mean against the 1991-2020 normal of 62.0°F: 2021 64.5°F (+2.5), 2022 63.1°F (+1.1), 2023 66.5°F (+4.5), 2024 65.9°F (+3.9), 2025 65.0°F (+3.0), 2026 64.7°F (+2.7). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 64.5°F | +2.5°F | 2.34 in |
| 2022 | 63.1°F | +1.1°F | 4.03 in |
| 2023 | 66.5°F | +4.5°F | 2.92 in |
| 2024 | 65.9°F | +3.9°F | 5.16 in |
| 2025 | 65.0°F | +3.0°F | 1.37 in |
| 2026 | 64.7°F | +2.7°F | 3.61 in |
Source: records: ACIS, NWS threaded record MSNthr; recent months: ACIS, station USW00014837. Records and recent months use complete months only.
How does September in Madison 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; Madison's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.