Superior weather in September: Superior, Wisconsin: normal highs, lows, rain and records for September
Superior in September has a normal high of 67°F and a normal low of 50°F, a daily mean of 58°F, falling from 72°F on the 1st to 61°F by the 30th. Measurable precipitation falls on 10 days in a normal September, 3.39 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 19°C and low of 10°C, 86 mm of precipitation in September.
- NOAA stationSuperior
- Station IDUSC00478349
- Location46.73°N 92.07°W
- Elevation607 ft (185 m)
- Population26,620
- Jan 23° 6°
- Feb 27° 9°
- Mar 36° 21°
- Apr 46° 32°
- May 57° 41°
- Jun 67° 50°
- Jul 76° 58°
- Aug 75° 58°
- Sep 67° 50°
- Oct 53° 39°
- Nov 39° 26°
- Dec 27° 13°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Superior in September?
The normal high is 67°F and the normal low 50°F, for a daily mean of 58.4°F. September is 8.0°F cooler than August and 12.6°F warmer than October. September is the 3rd warmest month of the year in Superior and the 4th wettest. Across the month the normal high falls 11°F, from 72°F on September 1 to 61°F on September 30. From one year to the next September's mean temperature typically moves about 2.5°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 56°F and 61°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 | 72°F | 55°F | 32% | 22% |
| September 8 | 70°F | 53°F | 33% | 21% |
| September 15 | 67°F | 50°F | 32% | 21% |
| September 22 | 64°F | 48°F | 32% | 20% |
| September 30 | 61°F | 45°F | 32% | 20% |
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 | 72°F | 55°F | 32% | 22% | 13 h 20 min |
| September 2 | 71°F | 55°F | 33% | 22% | 13 h 20 min |
| September 3 | 71°F | 54°F | 33% | 21% | 13 h 20 min |
| September 4 | 71°F | 54°F | 33% | 21% | 13 h 10 min |
| September 5 | 70°F | 54°F | 33% | 21% | 13 h 10 min |
| September 6 | 70°F | 53°F | 33% | 21% | 13 h 10 min |
| September 7 | 70°F | 53°F | 33% | 21% | 13 h |
| September 8 | 70°F | 53°F | 33% | 21% | 13 h |
| September 9 | 69°F | 52°F | 33% | 21% | 13 h |
| September 10 | 69°F | 52°F | 33% | 21% | 12 h 50 min |
| September 11 | 69°F | 52°F | 33% | 21% | 12 h 50 min |
| September 12 | 68°F | 52°F | 33% | 21% | 12 h 50 min |
| September 13 | 68°F | 51°F | 33% | 21% | 12 h 40 min |
| September 14 | 68°F | 51°F | 33% | 21% | 12 h 40 min |
| September 15 | 67°F | 50°F | 32% | 21% | 12 h 40 min |
| September 16 | 67°F | 50°F | 32% | 20% | 12 h 30 min |
| September 17 | 66°F | 50°F | 32% | 20% | 12 h 30 min |
| September 18 | 66°F | 49°F | 32% | 20% | 12 h 30 min |
| September 19 | 66°F | 49°F | 33% | 20% | 12 h 30 min |
| September 20 | 65°F | 49°F | 33% | 20% | 12 h 20 min |
| September 21 | 65°F | 48°F | 32% | 20% | 12 h 20 min |
| September 22 | 64°F | 48°F | 32% | 20% | 12 h 20 min |
| September 23 | 64°F | 48°F | 32% | 20% | 12 h 10 min |
| September 24 | 63°F | 47°F | 32% | 20% | 12 h 10 min |
| September 25 | 63°F | 47°F | 32% | 20% | 12 h 10 min |
| September 26 | 63°F | 46°F | 32% | 20% | 12 h |
| September 27 | 62°F | 46°F | 32% | 20% | 12 h |
| September 28 | 62°F | 46°F | 32% | 20% | 12 h |
| September 29 | 61°F | 45°F | 32% | 20% | 11 h 50 min |
| September 30 | 61°F | 45°F | 32% | 20% | 11 h 50 min |
- Normal high
- 67°FSeptember average
- Normal low
- 50°FSeptember average
- Precipitation
- 3.39 inmonth total
- Days with precipitation
- 100.01 inch or more
- 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
- 11
- Days at 80°F or more
- 3
- Sunshine
- 72%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00478349; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Superior in September?
On a given September day the chance of 0.01 inch or more is 32% on average, highest around September 5 (33%). In all, 3.39 in falls on 10 days of a normal September, 1 of them with an inch or more.
In a normal September in Superior, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00478349.
What are the records for September in Superior?
The warmest September temperature on this station's record (since 1909) is 97°F, on September 8, 1976; the coldest is 19°F, on September 13, 1963. The wettest September brought 8.46 in (1991).
The September mean against the 1991-2020 normal of 58.4°F: 2021 61.8°F (+3.4), 2022 60.3°F (+1.9), 2023 63.1°F (+4.8), 2024 64.7°F (+6.3), 2025 59.9°F (+1.5), 2026 61.1°F (+2.7). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 61.8°F | +3.4°F | 2.20 in |
| 2022 | 60.3°F | +1.9°F | 2.15 in |
| 2023 | 63.1°F | +4.8°F | 7.66 in |
| 2024 | 64.7°F | +6.3°F | 0.70 in |
| 2025 | 59.9°F | +1.5°F | 1.48 in |
| 2026 | 61.1°F | +2.7°F | 3.33 in |
Source: records: ACIS, station USC00478349; recent months: ACIS, station USC00478349. Records and recent months use complete months only.
How does September in Superior 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; Superior's is 67°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.