Norman weather in September: Norman, Oklahoma: normal highs, lows, rain and records for September
Norman in September has a normal high of 84°F and a normal low of 62°F, a daily mean of 73°F, falling from 89°F on the 1st to 79°F by the 30th. Measurable precipitation falls on 7 days in a normal September, 3.68 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 17°C, 93 mm of precipitation in September.
- NOAA stationNorman (3 mi SSE)
- Station IDUSC00346386
- Location35.18°N 97.44°W
- Elevation1,128 ft (344 m)
- Population131,010
- Jan 50° 28°
- Feb 54° 31°
- Mar 63° 40°
- Apr 71° 48°
- May 79° 58°
- Jun 87° 67°
- Jul 93° 71°
- Aug 92° 70°
- Sep 84° 62°
- Oct 74° 50°
- Nov 62° 39°
- Dec 52° 31°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Norman in September?
The normal high is 84°F and the normal low 62°F, for a daily mean of 73.2°F. September is 8.0°F cooler than August and 11.2°F warmer than October. September is the 4th warmest month of the year in Norman and the 4th wettest. Across the month the normal high falls 10°F, from 89°F on September 1 to 79°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 70°F and 76°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 25%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 89°F | 67°F | 25% | 16% |
| September 8 | 87°F | 65°F | 25% | 16% |
| September 15 | 84°F | 63°F | 25% | 17% |
| September 22 | 82°F | 60°F | 24% | 16% |
| September 30 | 79°F | 57°F | 23% | 16% |
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 | 89°F | 67°F | 25% | 16% | 13 h |
| September 2 | 89°F | 67°F | 25% | 17% | 12 h 50 min |
| September 3 | 88°F | 67°F | 25% | 17% | 12 h 50 min |
| September 4 | 88°F | 66°F | 25% | 17% | 12 h 50 min |
| September 5 | 88°F | 66°F | 25% | 17% | 12 h 50 min |
| September 6 | 87°F | 66°F | 25% | 17% | 12 h 50 min |
| September 7 | 87°F | 65°F | 25% | 16% | 12 h 40 min |
| September 8 | 87°F | 65°F | 25% | 16% | 12 h 40 min |
| September 9 | 86°F | 65°F | 24% | 16% | 12 h 40 min |
| September 10 | 86°F | 64°F | 24% | 16% | 12 h 40 min |
| September 11 | 86°F | 64°F | 24% | 16% | 12 h 40 min |
| September 12 | 85°F | 64°F | 24% | 16% | 12 h 30 min |
| September 13 | 85°F | 63°F | 24% | 17% | 12 h 30 min |
| September 14 | 85°F | 63°F | 25% | 17% | 12 h 30 min |
| September 15 | 84°F | 63°F | 25% | 17% | 12 h 30 min |
| September 16 | 84°F | 62°F | 25% | 17% | 12 h 20 min |
| September 17 | 84°F | 62°F | 25% | 17% | 12 h 20 min |
| September 18 | 83°F | 61°F | 25% | 17% | 12 h 20 min |
| September 19 | 83°F | 61°F | 24% | 17% | 12 h 20 min |
| September 20 | 83°F | 61°F | 24% | 17% | 12 h 20 min |
| September 21 | 82°F | 60°F | 24% | 16% | 12 h 10 min |
| September 22 | 82°F | 60°F | 24% | 16% | 12 h 10 min |
| September 23 | 82°F | 59°F | 24% | 16% | 12 h 10 min |
| September 24 | 81°F | 59°F | 24% | 16% | 12 h 10 min |
| September 25 | 81°F | 59°F | 24% | 16% | 12 h 10 min |
| September 26 | 81°F | 58°F | 24% | 16% | 12 h |
| September 27 | 80°F | 58°F | 23% | 16% | 12 h |
| September 28 | 80°F | 57°F | 23% | 16% | 12 h |
| September 29 | 80°F | 57°F | 23% | 16% | 12 h |
| September 30 | 79°F | 57°F | 23% | 16% | 11 h 50 min |
- Normal high
- 84°FSeptember average
- Normal low
- 62°FSeptember average
- Precipitation
- 3.68 inmonth total
- Days with precipitation
- 70.01 inch or more
- Days at 90°F or more
- 9
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 29
- Days at 80°F or more
- 23
- Sunshine
- 84%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00346386; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Norman in September?
On a given September day the chance of 0.01 inch or more is 24% on average, highest around September 2 (25%). In all, 3.68 in falls on 7 days of a normal September, 1 of them with an inch or more.
In a normal September in Norman, 9 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00346386.
What are the records for September in Norman?
The warmest September temperature on this station's record (since 1894) is 107°F, on September 3, 1939; the coldest is 32°F, on September 26, 1912. The wettest September brought 11.02 in (1923).
The September mean against the 1991-2020 normal of 73.2°F: 2023 77.6°F (+4.4), 2024 74.8°F (+1.6), 2025 74.7°F (+1.5), 2026 84.6°F (+11.4). 4 of 4 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 77.6°F | +4.4°F | 1.49 in |
| 2024 | 74.8°F | +1.6°F | 2.57 in |
| 2025 | 74.7°F | +1.5°F | 0.55 in |
| 2026 | 84.6°F | +11.4°F | 0.13 in |
Source: records: ACIS, station USC00346386; recent months: ACIS, station USC00346386. Records and recent months use complete months only.
How does September in Norman compare across Oklahoma?
Across the 134 places PlainClimate covers in Oklahoma, September normal highs run from 82°F in Arnett to 89°F in Grandfield; Norman's is 84°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.