Omaha weather in September: Omaha, Nebraska: normal highs, lows, rain and records for September
Omaha in September has a normal high of 79°F and a normal low of 56°F, a daily mean of 68°F, falling from 83°F on the 1st to 74°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 2.96 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 13°C, 75 mm of precipitation in September.
- NOAA stationOmaha Eppley Airfield
- Station IDUSW00014942
- Location41.31°N 95.90°W
- Elevation982 ft (299 m)
- From the center9 miles
- Population489,265
- Jan 34° 15°
- Feb 39° 19°
- Mar 52° 30°
- Apr 64° 41°
- May 75° 53°
- Jun 84° 63°
- Jul 88° 68°
- Aug 86° 66°
- Sep 79° 56°
- Oct 66° 43°
- Nov 50° 30°
- Dec 38° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Omaha in September?
The normal high is 79°F and the normal low 56°F, for a daily mean of 67.6°F. September is 8.1°F cooler than August and 13.2°F warmer than October. September is the 4th warmest month of the year in Omaha and the 6th wettest. Across the month the normal high falls 9°F, from 83°F on September 1 to 74°F on September 30. From one year to the next September's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 65°F and 71°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 | 83°F | 62°F | 27% | 17% |
| September 8 | 82°F | 59°F | 27% | 17% |
| September 15 | 80°F | 56°F | 27% | 17% |
| September 22 | 77°F | 54°F | 26% | 17% |
| September 30 | 74°F | 50°F | 25% | 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 | 83°F | 62°F | 27% | 17% | 13 h 10 min |
| September 2 | 83°F | 61°F | 27% | 17% | 13 h 10 min |
| September 3 | 83°F | 61°F | 27% | 17% | 13 h |
| September 4 | 83°F | 61°F | 27% | 17% | 13 h |
| September 5 | 82°F | 60°F | 27% | 17% | 13 h |
| September 6 | 82°F | 60°F | 27% | 17% | 13 h |
| September 7 | 82°F | 60°F | 27% | 17% | 12 h 50 min |
| September 8 | 82°F | 59°F | 27% | 17% | 12 h 50 min |
| September 9 | 81°F | 59°F | 27% | 17% | 12 h 50 min |
| September 10 | 81°F | 58°F | 27% | 17% | 12 h 50 min |
| September 11 | 81°F | 58°F | 27% | 17% | 12 h 40 min |
| September 12 | 81°F | 58°F | 27% | 17% | 12 h 40 min |
| September 13 | 80°F | 57°F | 27% | 16% | 12 h 40 min |
| September 14 | 80°F | 57°F | 27% | 16% | 12 h 40 min |
| September 15 | 80°F | 56°F | 27% | 17% | 12 h 30 min |
| September 16 | 79°F | 56°F | 26% | 17% | 12 h 30 min |
| September 17 | 79°F | 56°F | 26% | 17% | 12 h 30 min |
| September 18 | 79°F | 55°F | 26% | 17% | 12 h 20 min |
| September 19 | 78°F | 55°F | 26% | 17% | 12 h 20 min |
| September 20 | 78°F | 54°F | 26% | 17% | 12 h 20 min |
| September 21 | 78°F | 54°F | 26% | 17% | 12 h 20 min |
| September 22 | 77°F | 54°F | 26% | 17% | 12 h 10 min |
| September 23 | 77°F | 53°F | 26% | 16% | 12 h 10 min |
| September 24 | 76°F | 53°F | 26% | 16% | 12 h 10 min |
| September 25 | 76°F | 52°F | 26% | 16% | 12 h 10 min |
| September 26 | 75°F | 52°F | 26% | 16% | 12 h |
| September 27 | 75°F | 52°F | 26% | 16% | 12 h |
| September 28 | 75°F | 51°F | 25% | 16% | 12 h |
| September 29 | 74°F | 51°F | 25% | 16% | 11 h 50 min |
| September 30 | 74°F | 50°F | 25% | 16% | 11 h 50 min |
- Normal high
- 79°FSeptember average
- Normal low
- 56°FSeptember average
- Precipitation
- 2.96 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 25
- Days at 80°F or more
- 15
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014942; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Omaha in September?
On a given September day the chance of 0.01 inch or more is 26% on average, highest around September 1 (27%). In all, 2.96 in falls on 8 days of a normal September, 1 of them with an inch or more.
In a normal September in Omaha, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014942.
How humid and windy is Omaha in September?
At 3 p.m. the normal temperature is 71°F with 43% relative humidity and a dew point of 48°F; at 6 a.m. it is 52°F with 83% humidity. The wind averages 9.4 mph, most often from the south-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. | 52°F | 47°F | 83% | 7.7 mph | 56% |
| 9 a.m. | 59°F | 49°F | 70% | 9.8 mph | 59% |
| noon | 68°F | 49°F | 51% | 12.2 mph | 49% |
| 3 p.m. | 71°F | 48°F | 43% | 12.5 mph | 61% |
| 6 p.m. | 67°F | 48°F | 51% | 9.3 mph | 57% |
| 9 p.m. | 59°F | 49°F | 68% | 8.1 mph | 71% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014942. 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 Omaha?
The warmest September temperature on Omaha's official record (since 1871) is 104°F, on September 6, 1939; the coldest is 28°F, on September 29, 1984. The wettest September brought 13.75 in (1965).
The September mean against the 1991-2020 normal of 67.6°F: 2021 71.0°F (+3.4), 2022 68.9°F (+1.3), 2023 70.8°F (+3.3), 2024 70.5°F (+2.9), 2025 69.9°F (+2.3), 2026 72.9°F (+5.3). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.0°F | +3.4°F | 2.35 in |
| 2022 | 68.9°F | +1.3°F | 1.55 in |
| 2023 | 70.8°F | +3.3°F | 1.35 in |
| 2024 | 70.5°F | +2.9°F | 0.09 in |
| 2025 | 69.9°F | +2.3°F | 1.47 in |
| 2026 | 72.9°F | +5.3°F | 11.92 in |
Source: records: ACIS, NWS threaded record OMAthr; recent months: ACIS, station USW00014942. Records and recent months use complete months only.
How does September in Omaha compare across Nebraska?
Across the 137 places PlainClimate covers in Nebraska, September normal highs run from 74°F in Harrison to 83°F in Beaver City; Omaha's is 79°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.