St. Cloud weather in September: St. Cloud, Minnesota: normal highs, lows, rain and records for September
St. Cloud in September has a normal high of 71°F and a normal low of 48°F, a daily mean of 60°F, falling from 76°F on the 1st to 65°F by the 30th. Measurable precipitation falls on 10 days in a normal September, 3.01 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 9°C, 76 mm of precipitation in September.
- NOAA stationSt. Cloud Regional Airport
- Station IDUSW00014926
- Location45.54°N 94.05°W
- Elevation1,018 ft (310 m)
- Population72,145
- Jan 21° 3°
- Feb 26° 7°
- Mar 39° 20°
- Apr 54° 32°
- May 68° 45°
- Jun 77° 55°
- Jul 82° 59°
- Aug 79° 56°
- Sep 71° 48°
- Oct 56° 36°
- Nov 39° 23°
- Dec 26° 10°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is St. Cloud in September?
The normal high is 71°F and the normal low 48°F, for a daily mean of 59.5°F. September is 8.2°F cooler than August and 13.8°F warmer than October. September is the 4th warmest month of the year in St. Cloud and the 5th wettest. Across the month the normal high falls 11°F, from 76°F on September 1 to 65°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 57°F and 63°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 | 76°F | 53°F | 31% | 18% |
| September 8 | 74°F | 51°F | 32% | 18% |
| September 15 | 72°F | 48°F | 32% | 18% |
| September 22 | 69°F | 46°F | 33% | 19% |
| September 30 | 65°F | 42°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 | 76°F | 53°F | 31% | 18% | 13 h 20 min |
| September 2 | 76°F | 53°F | 31% | 18% | 13 h 20 min |
| September 3 | 76°F | 53°F | 31% | 18% | 13 h 10 min |
| September 4 | 75°F | 52°F | 31% | 18% | 13 h 10 min |
| September 5 | 75°F | 52°F | 31% | 18% | 13 h 10 min |
| September 6 | 75°F | 52°F | 32% | 18% | 13 h 10 min |
| September 7 | 75°F | 51°F | 32% | 18% | 13 h |
| September 8 | 74°F | 51°F | 32% | 18% | 13 h |
| September 9 | 74°F | 51°F | 32% | 18% | 13 h |
| September 10 | 73°F | 50°F | 32% | 18% | 12 h 50 min |
| September 11 | 73°F | 50°F | 32% | 18% | 12 h 50 min |
| September 12 | 73°F | 50°F | 32% | 18% | 12 h 50 min |
| September 13 | 72°F | 49°F | 32% | 18% | 12 h 40 min |
| September 14 | 72°F | 49°F | 32% | 18% | 12 h 40 min |
| September 15 | 72°F | 48°F | 32% | 18% | 12 h 40 min |
| September 16 | 71°F | 48°F | 33% | 18% | 12 h 30 min |
| September 17 | 71°F | 48°F | 33% | 19% | 12 h 30 min |
| September 18 | 70°F | 47°F | 33% | 19% | 12 h 30 min |
| September 19 | 70°F | 47°F | 33% | 19% | 12 h 20 min |
| September 20 | 69°F | 46°F | 33% | 19% | 12 h 20 min |
| September 21 | 69°F | 46°F | 33% | 19% | 12 h 20 min |
| September 22 | 69°F | 46°F | 33% | 19% | 12 h 10 min |
| September 23 | 68°F | 45°F | 33% | 19% | 12 h 10 min |
| September 24 | 68°F | 45°F | 33% | 19% | 12 h 10 min |
| September 25 | 67°F | 44°F | 33% | 19% | 12 h 10 min |
| September 26 | 67°F | 44°F | 33% | 19% | 12 h |
| September 27 | 66°F | 43°F | 33% | 19% | 12 h |
| September 28 | 66°F | 43°F | 33% | 19% | 12 h |
| September 29 | 65°F | 43°F | 33% | 19% | 11 h 50 min |
| September 30 | 65°F | 42°F | 33% | 19% | 11 h 50 min |
- Normal high
- 71°FSeptember average
- Normal low
- 48°FSeptember average
- Precipitation
- 3.01 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 1
- Nights at 32°F or colder
- 2
- Daylight
- 13 h 20 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 17
- Days at 80°F or more
- 7
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014926; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in St. Cloud in September?
On a given September day the chance of 0.01 inch or more is 32% on average, highest around September 21 (33%). In all, 3.01 in falls on 10 days of a normal September, 1 of them with an inch or more.
In a normal September in St. Cloud, 1 days reach 90°F and 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014926.
How humid and windy is St. Cloud in September?
At 3 p.m. the normal temperature is 63°F with 48% relative humidity and a dew point of 43°F; at 6 a.m. it is 45°F with 88% humidity. The wind averages 7.9 mph, most often from the west-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. | 45°F | 42°F | 88% | 6.0 mph | 70% |
| 9 a.m. | 53°F | 44°F | 72% | 9.3 mph | 62% |
| noon | 60°F | 43°F | 54% | 11.2 mph | 60% |
| 3 p.m. | 63°F | 43°F | 48% | 11.3 mph | 63% |
| 6 p.m. | 58°F | 44°F | 60% | 7.0 mph | 66% |
| 9 p.m. | 51°F | 44°F | 76% | 6.5 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014926. 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 St. Cloud?
The warmest September temperature on this station's record (since 1896) is 106°F, on September 10, 1931; the coldest is 18°F, on September 28, 1942. The wettest September brought 10.72 in (1926); the snowiest, 1.8 inches (1942).
The September mean against the 1991-2020 normal of 59.5°F: 2021 62.5°F (+3.0), 2022 62.0°F (+2.5), 2023 65.6°F (+6.1), 2024 67.0°F (+7.5), 2025 64.5°F (+5.0), 2026 63.7°F (+4.2). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 62.5°F | +3.0°F | 3.82 in |
| 2022 | 62.0°F | +2.5°F | 2.23 in |
| 2023 | 65.6°F | +6.1°F | 2.65 in |
| 2024 | 67.0°F | +7.5°F | 0.35 in |
| 2025 | 64.5°F | +5.0°F | 1.66 in |
| 2026 | 63.7°F | +4.2°F | 4.32 in |
Source: records: ACIS, station USW00014926; recent months: ACIS, station USW00014926. Records and recent months use complete months only.
How does September in St. Cloud 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; St. Cloud's is 71°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.