Mitchell weather in September: Mitchell, South Dakota: normal highs, lows, rain and records for September
Mitchell in September has a normal high of 77°F and a normal low of 51°F, a daily mean of 64°F, falling from 81°F on the 1st to 71°F by the 30th. Measurable precipitation falls on 7 days in a normal September, 2.34 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 11°C, 59 mm of precipitation in September.
- NOAA stationMitchell Airport
- Station IDUSW00094950
- Location43.77°N 98.03°W
- Elevation1,303 ft (397 m)
- From the center3 miles
- Population15,621
- Jan 29° 9°
- Feb 33° 13°
- Mar 45° 24°
- Apr 59° 35°
- May 71° 48°
- Jun 81° 59°
- Jul 87° 64°
- Aug 84° 61°
- Sep 77° 51°
- Oct 62° 38°
- Nov 46° 24°
- Dec 32° 14°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Mitchell in September?
The normal high is 77°F and the normal low 51°F, for a daily mean of 63.9°F. September is 8.3°F cooler than August and 14.2°F warmer than October. September is the 4th warmest month of the year in Mitchell and the 5th wettest. Across the month the normal high falls 10°F, from 81°F on September 1 to 71°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 61°F and 67°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 26%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 81°F | 56°F | 26% | 13% |
| September 8 | 80°F | 54°F | 25% | 13% |
| September 15 | 78°F | 51°F | 24% | 13% |
| September 22 | 75°F | 49°F | 24% | 13% |
| September 30 | 71°F | 45°F | 23% | 13% |
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 | 81°F | 56°F | 26% | 13% | 13 h 20 min |
| September 2 | 81°F | 56°F | 25% | 13% | 13 h 10 min |
| September 3 | 81°F | 56°F | 25% | 13% | 13 h 10 min |
| September 4 | 81°F | 55°F | 25% | 13% | 13 h 10 min |
| September 5 | 81°F | 55°F | 25% | 13% | 13 h |
| September 6 | 80°F | 55°F | 25% | 13% | 13 h |
| September 7 | 80°F | 54°F | 25% | 13% | 13 h |
| September 8 | 80°F | 54°F | 25% | 13% | 13 h |
| September 9 | 80°F | 54°F | 25% | 13% | 12 h 50 min |
| September 10 | 79°F | 53°F | 25% | 13% | 12 h 50 min |
| September 11 | 79°F | 53°F | 25% | 13% | 12 h 50 min |
| September 12 | 79°F | 53°F | 25% | 13% | 12 h 40 min |
| September 13 | 78°F | 52°F | 24% | 13% | 12 h 40 min |
| September 14 | 78°F | 52°F | 24% | 13% | 12 h 40 min |
| September 15 | 78°F | 51°F | 24% | 13% | 12 h 30 min |
| September 16 | 77°F | 51°F | 24% | 13% | 12 h 30 min |
| September 17 | 77°F | 51°F | 24% | 13% | 12 h 30 min |
| September 18 | 76°F | 50°F | 24% | 13% | 12 h 30 min |
| September 19 | 76°F | 50°F | 24% | 13% | 12 h 20 min |
| September 20 | 75°F | 49°F | 24% | 13% | 12 h 20 min |
| September 21 | 75°F | 49°F | 24% | 13% | 12 h 20 min |
| September 22 | 75°F | 49°F | 24% | 13% | 12 h 10 min |
| September 23 | 74°F | 48°F | 24% | 13% | 12 h 10 min |
| September 24 | 74°F | 48°F | 24% | 13% | 12 h 10 min |
| September 25 | 73°F | 47°F | 23% | 13% | 12 h 10 min |
| September 26 | 73°F | 47°F | 23% | 13% | 12 h |
| September 27 | 72°F | 46°F | 23% | 13% | 12 h |
| September 28 | 72°F | 46°F | 23% | 13% | 12 h |
| September 29 | 71°F | 46°F | 23% | 13% | 11 h 50 min |
| September 30 | 71°F | 45°F | 23% | 13% | 11 h 50 min |
- Normal high
- 77°FSeptember average
- Normal low
- 51°FSeptember average
- Precipitation
- 2.34 inmonth total
- Days with precipitation
- 70.01 inch or more
- Days at 90°F or more
- 3
- 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
- 23
- Days at 80°F or more
- 13
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094950; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Mitchell in September?
On a given September day the chance of 0.01 inch or more is 24% on average, highest around September 1 (26%). In all, 2.34 in falls on 7 days of a normal September, 1 of them with an inch or more.
In a normal September in Mitchell, 3 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094950.
How humid and windy is Mitchell in September?
At 3 p.m. the normal temperature is 68°F with 40% relative humidity and a dew point of 43°F; at 6 a.m. it is 48°F with 81% humidity. The wind averages 9.9 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 48°F | 43°F | 81% | 8.2 mph | – |
| 9 a.m. | 55°F | 45°F | 67% | 10.7 mph | – |
| noon | 65°F | 44°F | 47% | 12.5 mph | – |
| 3 p.m. | 68°F | 43°F | 40% | 12.9 mph | – |
| 6 p.m. | 64°F | 44°F | 48% | 8.9 mph | – |
| 9 p.m. | 56°F | 44°F | 64% | 8.5 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094950. 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 Mitchell?
The warmest September temperature on Mitchell's official record (since 1893) is 106°F, on September 5, 1933; the coldest is 11°F, on September 29, 1899. The wettest September brought 7.63 in (2019).
The September mean against the 1991-2020 normal of 63.9°F: 2021 67.3°F (+3.4), 2022 67.0°F (+3.1), 2023 67.9°F (+4.0), 2024 69.2°F (+5.3), 2025 66.8°F (+2.9), 2026 67.9°F (+4.0). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 67.3°F | +3.4°F | 1.33 in |
| 2022 | 67.0°F | +3.1°F | 0.02 in |
| 2023 | 67.9°F | +4.0°F | 1.14 in |
| 2024 | 69.2°F | +5.3°F | 0.23 in |
| 2025 | 66.8°F | +2.9°F | 0.79 in |
| 2026 | 67.9°F | +4.0°F | 7.38 in |
Source: records: ACIS, NWS threaded record MHEthr; recent months: ACIS, station USW00094950. Records and recent months use complete months only.
How does September in Mitchell compare across South Dakota?
Across the 100 places PlainClimate covers in South Dakota, September normal highs run from 69°F in Custer to 82°F in Interior; Mitchell's is 77°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Mitchell in August84°F by day, 61°F at night
- Mitchell in October62°F by day, 38°F at night
- Mitchell through the yearEvery month, frost dates, records and recent years
- South Dakota in SeptemberThe statewide normal and the warmest and coolest places
- Interior: South Dakota's warmest Septembernormal high 82°F