Jefferson City weather in September: Jefferson City, Missouri: normal highs, lows, rain and records for September
Jefferson City in September has a normal high of 80°F and a normal low of 57°F, a daily mean of 69°F, falling from 85°F on the 1st to 76°F by the 30th. Measurable precipitation falls on 11 days in a normal September, 3.73 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 14°C, 95 mm of precipitation in September.
- NOAA stationJefferson City Memorial Airport
- Station IDUSW00003963
- Location38.59°N 92.16°W
- Elevation573 ft (175 m)
- Population42,564
- Jan 41° 23°
- Feb 47° 26°
- Mar 58° 35°
- Apr 68° 45°
- May 77° 55°
- Jun 85° 65°
- Jul 89° 69°
- Aug 88° 66°
- Sep 80° 57°
- Oct 70° 46°
- Nov 57° 35°
- Dec 45° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Jefferson City in September?
The normal high is 80°F and the normal low 57°F, for a daily mean of 68.8°F. September is 8.1°F cooler than August and 11.2°F warmer than October. September is the 4th warmest month of the year in Jefferson City and the 4th wettest. Across the month the normal high falls 9°F, from 85°F on September 1 to 76°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 66°F and 72°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 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 85°F | 63°F | 35% | 18% |
| September 8 | 83°F | 60°F | 35% | 18% |
| September 15 | 81°F | 57°F | 35% | 17% |
| September 22 | 78°F | 55°F | 35% | 17% |
| September 30 | 76°F | 52°F | 35% | 17% |
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 | 85°F | 63°F | 35% | 18% | 13 h |
| September 2 | 85°F | 62°F | 35% | 18% | 13 h |
| September 3 | 84°F | 62°F | 35% | 18% | 13 h |
| September 4 | 84°F | 62°F | 35% | 18% | 13 h |
| September 5 | 84°F | 61°F | 35% | 18% | 12 h 50 min |
| September 6 | 83°F | 61°F | 35% | 18% | 12 h 50 min |
| September 7 | 83°F | 61°F | 35% | 18% | 12 h 50 min |
| September 8 | 83°F | 60°F | 35% | 18% | 12 h 50 min |
| September 9 | 83°F | 60°F | 35% | 18% | 12 h 40 min |
| September 10 | 82°F | 59°F | 35% | 18% | 12 h 40 min |
| September 11 | 82°F | 59°F | 35% | 17% | 12 h 40 min |
| September 12 | 82°F | 59°F | 35% | 17% | 12 h 40 min |
| September 13 | 81°F | 58°F | 35% | 17% | 12 h 30 min |
| September 14 | 81°F | 58°F | 35% | 17% | 12 h 30 min |
| September 15 | 81°F | 57°F | 35% | 17% | 12 h 30 min |
| September 16 | 80°F | 57°F | 35% | 17% | 12 h 30 min |
| September 17 | 80°F | 57°F | 35% | 17% | 12 h 20 min |
| September 18 | 80°F | 56°F | 35% | 17% | 12 h 20 min |
| September 19 | 79°F | 56°F | 35% | 17% | 12 h 20 min |
| September 20 | 79°F | 56°F | 35% | 17% | 12 h 20 min |
| September 21 | 79°F | 55°F | 35% | 17% | 12 h 20 min |
| September 22 | 78°F | 55°F | 35% | 17% | 12 h 10 min |
| September 23 | 78°F | 54°F | 35% | 17% | 12 h 10 min |
| September 24 | 78°F | 54°F | 35% | 16% | 12 h 10 min |
| September 25 | 77°F | 54°F | 35% | 16% | 12 h 10 min |
| September 26 | 77°F | 53°F | 35% | 16% | 12 h |
| September 27 | 77°F | 53°F | 35% | 16% | 12 h |
| September 28 | 76°F | 52°F | 35% | 17% | 12 h |
| September 29 | 76°F | 52°F | 35% | 17% | 12 h |
| September 30 | 76°F | 52°F | 35% | 17% | 11 h 50 min |
- Normal high
- 80°FSeptember average
- Normal low
- 57°FSeptember average
- Precipitation
- 3.73 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 28
- Days at 80°F or more
- 17
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003963; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Jefferson City in September?
On a given September day the chance of 0.01 inch or more is 35% on average, highest around September 16 (35%). In all, 3.73 in falls on 11 days of a normal September, 1 of them with an inch or more.
In a normal September in Jefferson City, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003963.
What are the records for September in Jefferson City?
The warmest September temperature on Jefferson City's official record (since 1894) is 107°F, on September 3, 1939; the coldest is 29°F, on September 30, 1899. The wettest September brought 12.83 in (1993).
The September mean against the 1991-2020 normal of 68.8°F: 2021 73.4°F (+4.6), 2022 70.2°F (+1.4), 2023 72.2°F (+3.4), 2024 71.2°F (+2.4), 2025 71.6°F (+2.8), 2026 77.7°F (+8.9). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 73.4°F | +4.6°F | 2.76 in |
| 2022 | 70.2°F | +1.4°F | 1.19 in |
| 2023 | 72.2°F | +3.4°F | 0.55 in |
| 2024 | 71.2°F | +2.4°F | 2.93 in |
| 2025 | 71.6°F | +2.8°F | 2.56 in |
| 2026 | 77.7°F | +8.9°F | 1.10 in |
Source: records: ACIS, NWS threaded record JEFthr; recent months: ACIS, station USW00003963. Records and recent months use complete months only.
How does September in Jefferson City compare across Missouri?
Across the 134 places PlainClimate covers in Missouri, September normal highs run from 76°F in Unionville to 85°F in Kennett; Jefferson City's is 80°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Jefferson City in August88°F by day, 66°F at night
- Jefferson City in October70°F by day, 46°F at night
- Jefferson City through the yearEvery month, frost dates, records and recent years
- Missouri in SeptemberThe statewide normal and the warmest and coolest places
- Kennett: Missouri's warmest Septembernormal high 85°F