September is one of the warmer months of the year in Tulsa, with average highs near 30°C and lows around 17.3°C (mean 23.7°C). It is about average for rainfall, averaging 104 mm of rainfall and 66% relative humidity across the period.
September is one of the warmer months of the year in Tulsa. Across 45 years of records, the warmest September in Tulsa was 1998 — when the month averaged 27.6°C — while the coldest was 1989 at 20.5°C. Typical September days reach 30°C with nights near 17.3°C. The long-term trend is warming, about 0.5°C per decade.
September is about average for rainfall in Tulsa, averaging 104 mm of rainfall. The wettest September on record was 1986 with 329 mm, while the driest was 2024 at 19 mm.
Relative humidity in Tulsa during September averages 66%. The most humid September was 2009 at 80%, and the least humid was 2000 at 45%.
September receives about 4.9 kWh/m²/day of solar energy in Tulsa. The sunniest September was 2004 at 5.7 kWh/m²/day, and the cloudiest was 1986 at 4.
Average wind speed in Tulsa during September is 2.1 m/s. The windiest September was 1984 at 2.8 m/s, while the calmest was 2025 at 1.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.2°C | 22.8°C | 23.1°C | 24.4°C | 25.0°C | +1.8°C |
| Avg High | 29.6°C | 29.0°C | 29.6°C | 30.6°C | 31.8°C | +2.2°C |
| Avg Low | 16.9°C | 16.6°C | 16.7°C | 18.3°C | 18.2°C | +1.3°C |
| Avg Rain | 115 mm | 147 mm | 96 mm | 87 mm | 57 mm | -58 mm |
September temperatures in Tulsa have risen by about 1.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 2.4°C (1984) to a record high of 43.9°C (1998).
Rainfall in September is about average for rainfall, averaging 104 mm, with a wettest year of 329 mm.
One of the best times to visit Tulsa
September is one of the best times to visit Tulsa. Expect days averaging 30°C and nights around 17.3°C (mean 23.7°C) — warmer than Tulsa's yearly average — with higher rainfall (104 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 30.8°C | 24.4°C | 18.1°C | 36.0°C | 12.0°C | 51 mm | 68% | 1.5 m/s | 4.8 |
| 2024 | 32.0°C | 24.8°C | 17.5°C | 38.5°C | 11.2°C | 19 mm | 59% | 1.8 m/s | 5.3 |
| 2023 | 32.9°C | 25.9°C | 18.9°C | 38.7°C | 14.9°C | 107 mm | 61% | 2 m/s | 5.2 |
| 2022 | 33.4°C | 25.9°C | 18.4°C | 39.4°C | 11.6°C | 31 mm | 52% | 2 m/s | 5.6 |
| 2021 | 33.6°C | 26.5°C | 19.4°C | 38.3°C | 11.1°C | 40 mm | 56% | 2.3 m/s | 5.4 |
| 2020 | 28.2°C | 22.4°C | 16.6°C | 33.7°C | 7.7°C | 92 mm | 75% | 1.9 m/s | 4.6 |
| 2019 | 31.6°C | 26.6°C | 21.6°C | 34.6°C | 18.3°C | 115 mm | 75% | 2.1 m/s | 5.1 |
| 2018 | 30.0°C | 24.5°C | 19.0°C | 36.7°C | 9.0°C | 97 mm | 74% | 2 m/s | 4.3 |
| 2017 | 30.7°C | 24.2°C | 17.7°C | 35.3°C | 11.1°C | 33 mm | 64% | 2 m/s | 5.1 |
| 2016 | 31.5°C | 25.2°C | 18.9°C | 36.4°C | 10.2°C | 62 mm | 67% | 2.1 m/s | 5.4 |
| 2015 | 29.5°C | 24.0°C | 18.4°C | 35.0°C | 11.2°C | 67 mm | 73% | 2 m/s | 5.2 |
| 2014 | 30.3°C | 24.1°C | 17.9°C | 36.5°C | 9.5°C | 86 mm | 68% | 2.3 m/s | 4.8 |
| 2013 | 32.4°C | 25.2°C | 18.0°C | 38.3°C | 9.7°C | 65 mm | 59% | 2 m/s | 5.3 |
| 2012 | 31.4°C | 24.5°C | 17.7°C | 41.7°C | 11.7°C | 86 mm | 62% | 2 m/s | 4.9 |
| 2011 | 29.5°C | 22.4°C | 15.4°C | 40.5°C | 9.1°C | 87 mm | 54% | 2.2 m/s | 5.3 |
| 2010 | 29.4°C | 23.7°C | 18.0°C | 35.9°C | 8.7°C | 175 mm | 72% | 2.4 m/s | 5.1 |
| 2009 | 26.1°C | 21.0°C | 15.9°C | 31.2°C | 7.3°C | 223 mm | 80% | 2 m/s | 4.3 |
| 2008 | 26.6°C | 21.3°C | 15.9°C | 32.9°C | 9.5°C | 140 mm | 79% | 2 m/s | 4.7 |
| 2007 | 28.5°C | 23.2°C | 17.9°C | 33.2°C | 12.2°C | 143 mm | 77% | 2 m/s | 4.6 |
| 2006 | 28.3°C | 21.5°C | 14.8°C | 34.4°C | 8.7°C | 99 mm | 63% | 2.1 m/s | 5.1 |
| 2005 | 33.1°C | 26.3°C | 19.5°C | 37.2°C | 9.4°C | 53 mm | 62% | 2.1 m/s | 5.3 |
| 2004 | 31.4°C | 24.1°C | 16.8°C | 35.7°C | 11.8°C | 27 mm | 58% | 2.1 m/s | 5.7 |
| 2003 | 26.3°C | 20.6°C | 14.9°C | 30.9°C | 7.9°C | 83 mm | 74% | 2.1 m/s | 4.7 |
| 2002 | 32.4°C | 25.0°C | 17.7°C | 37.4°C | 10.4°C | 35 mm | 58% | 2 m/s | 5.3 |
| 2001 | 29.3°C | 22.5°C | 15.8°C | 35.2°C | 6.7°C | 90 mm | 65% | 1.9 m/s | 5.1 |
| 2000 | 33.5°C | 25.7°C | 17.9°C | 43.9°C | 6.2°C | 66 mm | 45% | 2.3 m/s | 5.4 |
| 1999 | 28.4°C | 21.9°C | 15.4°C | 37.5°C | 6.5°C | 130 mm | 63% | 2.2 m/s | 4.5 |
| 1998 🔥 | 33.7°C | 27.6°C | 21.6°C | 43.9°C | 16.6°C | 157 mm | 61% | 2.1 m/s | 5.1 |
| 1997 | 29.9°C | 23.4°C | 17.0°C | 35.7°C | 11.4°C | 94 mm | 68% | 2.1 m/s | 4.9 |
| 1996 | 28.2°C | 21.8°C | 15.4°C | 34.8°C | 5.7°C | 203 mm | 68% | 1.9 m/s | 4.4 |
| 1995 | 28.0°C | 21.9°C | 15.8°C | 39.8°C | 3.2°C | 121 mm | 67% | 2.1 m/s | 4.1 |
| 1994 | 28.6°C | 22.1°C | 15.5°C | 34.1°C | 7.8°C | 68 mm | 67% | 2 m/s | 4.8 |
| 1993 | 26.8°C | 20.6°C | 14.3°C | 32.7°C | 5.9°C | 241 mm | 74% | 2.2 m/s | 4.7 |
| 1992 | 27.2°C | 21.4°C | 15.6°C | 31.6°C | 5.9°C | 154 mm | 76% | 2.2 m/s | 4.9 |
| 1991 | 26.8°C | 21.6°C | 16.4°C | 34.5°C | 6.1°C | 146 mm | 73% | 2 m/s | 4.5 |
| 1990 | 31.9°C | 25.5°C | 19.1°C | 40.6°C | 6.9°C | 152 mm | 63% | 1.8 m/s | 4.8 |
| 1989 ❄️ | 26.6°C | 20.5°C | 14.5°C | 35.6°C | 2.4°C | 108 mm | 70% | 2.1 m/s | 4.4 |
| 1988 | 30.6°C | 23.5°C | 16.5°C | 37.4°C | 11.6°C | 137 mm | 64% | 2 m/s | 4.8 |
| 1987 | 28.5°C | 22.3°C | 16.1°C | 34.4°C | 8.6°C | 108 mm | 69% | 1.7 m/s | 4.9 |
| 1986 🌧️ | 28.5°C | 23.9°C | 19.3°C | 31.5°C | 11.6°C | 329 mm | 78% | 2.7 m/s | 4 |
| 1985 | 29.6°C | 23.5°C | 17.4°C | 41.1°C | 4.8°C | 119 mm | 63% | 2.7 m/s | 4.8 |
| 1984 | 29.4°C | 22.7°C | 16.1°C | 37.2°C | 2.4°C | 93 mm | 57% | 2.8 m/s | 4.6 |
| 1983 | 32.0°C | 24.9°C | 17.8°C | 39.0°C | 4.4°C | 47 mm | 53% | 2.6 m/s | — |
| 1982 | 30.8°C | 23.9°C | 17.1°C | 37.8°C | 7.2°C | 47 mm | 58% | 2.3 m/s | — |
| 1981 | 30.2°C | 23.5°C | 16.9°C | 34.2°C | 7.6°C | 49 mm | 64% | 2.2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 30°C with lows near 17.3°C (mean 23.7°C), based on 45 years of NASA POWER data.
September averages 104 mm of rainfall in Tulsa, about average for rainfall. The wettest on record was 329 mm in 1986.
The hottest September reached 43.9°C in 1998. The coldest dipped to 2.4°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.8°C. Daytime highs moved from 30.4°C to 32.5°C and overnight lows from 17.1°C to 18.5°C over the same span.
September is one of the warmer months of the year in Tulsa and about average for rainfall, so plan for around 30°C daytime highs and 17.3°C at night.
Not quite — September is the 9th coolest month in Tulsa, averaging 23.7°C.
For September in Tulsa, pack light, breathable clothing and sun protection, with typical highs of 30°C and lows of 17.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 66% — moderately humid.
Average wind speed in September is 2.1 m/s. The windiest September on record averaged 2.8 m/s (1984).
The wettest September on record was 1986 with 329 mm. On average, September sees 104 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Tulsa behaves each September, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for September specifically, along with year-by-year records and how the month has changed over the decades.
