Owatonna weather in September: Owatonna, Minnesota: normal highs, lows, rain and records for September
Owatonna 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, 3.80 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 11°C, 97 mm of precipitation in September.
- NOAA stationOwatonna
- Station IDUSC00216287
- Location44.10°N 93.23°W
- Elevation1,140 ft (348 m)
- Population26,626
- Jan 22° 5°
- Feb 27° 9°
- Mar 40° 22°
- Apr 55° 34°
- May 68° 47°
- Jun 78° 58°
- Jul 82° 62°
- Aug 79° 60°
- Sep 73° 51°
- Oct 59° 38°
- Nov 42° 25°
- Dec 28° 13°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Owatonna in September?
The normal high is 73°F and the normal low 51°F, for a daily mean of 62.1°F. September is 7.4°F cooler than August and 13.8°F warmer than October. September is the 4th warmest month of the year in Owatonna 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 3.2°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 30%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 77°F | 57°F | 30% | 19% |
| September 8 | 76°F | 55°F | 29% | 19% |
| September 15 | 73°F | 52°F | 29% | 19% |
| September 22 | 71°F | 49°F | 30% | 19% |
| September 30 | 67°F | 45°F | 29% | 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 | 57°F | 30% | 19% | 13 h 20 min |
| September 2 | 77°F | 57°F | 30% | 19% | 13 h 10 min |
| September 3 | 77°F | 56°F | 30% | 19% | 13 h 10 min |
| September 4 | 77°F | 56°F | 30% | 19% | 13 h 10 min |
| September 5 | 76°F | 56°F | 30% | 19% | 13 h |
| September 6 | 76°F | 55°F | 29% | 19% | 13 h |
| September 7 | 76°F | 55°F | 29% | 19% | 13 h |
| September 8 | 76°F | 55°F | 29% | 19% | 13 h |
| September 9 | 75°F | 54°F | 29% | 19% | 12 h 50 min |
| September 10 | 75°F | 54°F | 29% | 19% | 12 h 50 min |
| September 11 | 75°F | 54°F | 29% | 19% | 12 h 50 min |
| September 12 | 74°F | 53°F | 29% | 19% | 12 h 40 min |
| September 13 | 74°F | 53°F | 29% | 19% | 12 h 40 min |
| September 14 | 74°F | 52°F | 29% | 19% | 12 h 40 min |
| September 15 | 73°F | 52°F | 29% | 19% | 12 h 40 min |
| September 16 | 73°F | 52°F | 29% | 19% | 12 h 30 min |
| September 17 | 73°F | 51°F | 29% | 19% | 12 h 30 min |
| September 18 | 72°F | 51°F | 30% | 19% | 12 h 30 min |
| September 19 | 72°F | 50°F | 30% | 19% | 12 h 20 min |
| September 20 | 72°F | 50°F | 30% | 19% | 12 h 20 min |
| September 21 | 71°F | 49°F | 30% | 19% | 12 h 20 min |
| September 22 | 71°F | 49°F | 30% | 19% | 12 h 10 min |
| September 23 | 70°F | 48°F | 30% | 19% | 12 h 10 min |
| September 24 | 70°F | 48°F | 30% | 19% | 12 h 10 min |
| September 25 | 69°F | 47°F | 29% | 19% | 12 h 10 min |
| September 26 | 69°F | 47°F | 29% | 19% | 12 h |
| September 27 | 69°F | 47°F | 29% | 19% | 12 h |
| September 28 | 68°F | 46°F | 29% | 19% | 12 h |
| September 29 | 68°F | 46°F | 29% | 19% | 11 h 50 min |
| September 30 | 67°F | 45°F | 29% | 19% | 11 h 50 min |
- Normal high
- 73°FSeptember average
- Normal low
- 51°FSeptember average
- Precipitation
- 3.80 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
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00216287; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Owatonna in September?
On a given September day the chance of 0.01 inch or more is 29% on average, highest around September 1 (30%). In all, 3.80 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Owatonna, 1 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00216287.
What are the records for September in Owatonna?
The warmest September temperature on this station's record (since 1961) is 98°F, on September 7, 1978; the coldest is 23°F, on September 22, 1974. The wettest September brought 12.54 in (2010).
The September mean against the 1991-2020 normal of 62.1°F: 2021 64.0°F (+1.9), 2022 62.9°F (+0.8), 2023 67.2°F (+5.1), 2025 65.6°F (+3.5), 2026 65.6°F (+3.5). 5 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 64.0°F | +1.9°F | 2.11 in |
| 2022 | 62.9°F | +0.8°F | 0.98 in |
| 2023 | 67.2°F | +5.1°F | 2.82 in |
| 2025 | 65.6°F | +3.5°F | 1.37 in |
| 2026 | 65.6°F | +3.5°F | 5.11 in |
Source: records: ACIS, station USC00216287; recent months: ACIS, station USC00216287. Records and recent months use complete months only.
How does September in Owatonna compare across Minnesota?
Across the 129 places PlainClimate covers in Minnesota, September normal highs run from 62°F in Lutsen to 76°F in Milan; Owatonna's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.