Mankato weather in September: Mankato, Minnesota: normal highs, lows, rain and records for September
Mankato in September has a normal high of 74°F and a normal low of 50°F, a daily mean of 62°F, falling from 78°F on the 1st to 68°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 3.30 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 10°C, 84 mm of precipitation in September.
- NOAA stationMankato
- Station IDUSC00215073
- Location44.15°N 94.02°W
- Elevation850 ft (259 m)
- Population46,459
- Jan 24° 6°
- Feb 29° 9°
- Mar 41° 22°
- Apr 57° 34°
- May 69° 47°
- Jun 79° 58°
- Jul 82° 62°
- Aug 80° 59°
- Sep 74° 50°
- Oct 60° 37°
- Nov 43° 25°
- Dec 29° 13°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Mankato in September?
The normal high is 74°F and the normal low 50°F, for a daily mean of 61.9°F. September is 7.6°F cooler than August and 13.3°F warmer than October. September is the 4th warmest month of the year in Mankato and the 6th wettest. Across the month the normal high falls 10°F, from 78°F on September 1 to 68°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 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 27%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 78°F | 56°F | 26% | 18% |
| September 8 | 76°F | 53°F | 26% | 17% |
| September 15 | 74°F | 51°F | 26% | 18% |
| September 22 | 72°F | 47°F | 27% | 19% |
| September 30 | 68°F | 44°F | 27% | 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 | 26% | 18% | 13 h 20 min |
| September 2 | 78°F | 56°F | 26% | 18% | 13 h 10 min |
| September 3 | 78°F | 55°F | 26% | 17% | 13 h 10 min |
| September 4 | 77°F | 55°F | 26% | 17% | 13 h 10 min |
| September 5 | 77°F | 55°F | 26% | 17% | 13 h 10 min |
| September 6 | 77°F | 54°F | 26% | 17% | 13 h |
| September 7 | 77°F | 54°F | 26% | 17% | 13 h |
| September 8 | 76°F | 53°F | 26% | 17% | 13 h |
| September 9 | 76°F | 53°F | 26% | 18% | 12 h 50 min |
| September 10 | 76°F | 53°F | 26% | 18% | 12 h 50 min |
| September 11 | 76°F | 52°F | 26% | 18% | 12 h 50 min |
| September 12 | 75°F | 52°F | 26% | 18% | 12 h 40 min |
| September 13 | 75°F | 51°F | 26% | 18% | 12 h 40 min |
| September 14 | 75°F | 51°F | 26% | 18% | 12 h 40 min |
| September 15 | 74°F | 51°F | 26% | 18% | 12 h 40 min |
| September 16 | 74°F | 50°F | 26% | 18% | 12 h 30 min |
| September 17 | 74°F | 50°F | 26% | 18% | 12 h 30 min |
| September 18 | 73°F | 49°F | 27% | 18% | 12 h 30 min |
| September 19 | 73°F | 49°F | 27% | 19% | 12 h 20 min |
| September 20 | 72°F | 48°F | 27% | 19% | 12 h 20 min |
| September 21 | 72°F | 48°F | 27% | 19% | 12 h 20 min |
| September 22 | 72°F | 47°F | 27% | 19% | 12 h 10 min |
| September 23 | 71°F | 47°F | 27% | 19% | 12 h 10 min |
| September 24 | 71°F | 46°F | 27% | 19% | 12 h 10 min |
| September 25 | 70°F | 46°F | 27% | 19% | 12 h 10 min |
| September 26 | 70°F | 46°F | 27% | 19% | 12 h |
| September 27 | 69°F | 45°F | 27% | 19% | 12 h |
| September 28 | 69°F | 45°F | 27% | 19% | 12 h |
| September 29 | 68°F | 44°F | 27% | 19% | 11 h 50 min |
| September 30 | 68°F | 44°F | 27% | 19% | 11 h 50 min |
- Normal high
- 74°FSeptember average
- Normal low
- 50°FSeptember average
- Precipitation
- 3.30 inmonth total
- Days with precipitation
- 80.01 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
- 19
- Days at 80°F or more
- 8
- Sunshine
- 78%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00215073; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Mankato in September?
On a given September day the chance of 0.01 inch or more is 26% on average, highest around September 23 (27%). In all, 3.30 in falls on 8 days of a normal September, 1 of them with an inch or more.
In a normal September in Mankato, 1 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00215073.
What are the records for September in Mankato?
The warmest September temperature on this station's record (since 1954) is 99°F, on September 7, 1978; the coldest is 23°F, on September 27, 1984. The wettest September brought 9.98 in (1942).
Source: records: ACIS, station USC00215073. Records and recent months use complete months only.
How does September in Mankato 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; Mankato's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.