September is one of the warmer months of the year in Lawton, with average highs near 30.9°C and lows around 18.3°C (mean 24.6°C). It is about average for rainfall, averaging 80 mm of rainfall and 59% relative humidity across the period.
September is one of the warmer months of the year in Lawton. Across 45 years of records, the warmest September in Lawton was 1998 — when the month averaged 29.4°C — while the coldest were 1989 and 1991 at 21.2°C. Typical September days reach 30.9°C with nights near 18.3°C. The long-term trend is warming, about 0.5°C per decade.
September is about average for rainfall in Lawton, averaging 80 mm of rainfall. The wettest September on record was 1986 with 221 mm, while the driest was 1983 at 14 mm.
Relative humidity in Lawton during September averages 59%. The most humid September was 2018 at 78%, and the least humid was 2000 at 37%.
September receives about 5.3 kWh/m²/day of solar energy in Lawton. The sunniest September was 2022 at 6.1 kWh/m²/day, and the cloudiest was 1991 at 4.2.
Average wind speed in Lawton during September is 2.8 m/s. The windiest Septembers were 1983, 1984 and 1985 at 3.6 m/s, while the calmest was 1990 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.0°C | 24.2°C | 24.2°C | 25.4°C | 25.9°C | +1.9°C |
| Avg High | 30.3°C | 30.5°C | 30.8°C | 31.3°C | 32.5°C | +2.2°C |
| Avg Low | 17.7°C | 18.0°C | 17.7°C | 19.4°C | 19.2°C | +1.5°C |
| Avg Rain | 98 mm | 91 mm | 59 mm | 93 mm | 50 mm | -47 mm |
September temperatures in Lawton have risen by about 1.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 2.9°C (1985) to a record high of 44.3°C (2000).
Rainfall in September is about average for rainfall, averaging 80 mm, with a wettest year of 221 mm.
One of the best times to visit Lawton
September is one of the best times to visit Lawton. Expect days averaging 30.9°C and nights around 18.3°C (mean 24.6°C) — warmer than Lawton's yearly average — with higher rainfall (80 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 | 31.6°C | 25.3°C | 19.1°C | 35.0°C | 14.8°C | 44 mm | 61% | 2.2 m/s | 5.4 |
| 2024 | 33.0°C | 26.0°C | 19.0°C | 38.2°C | 14.5°C | 43 mm | 53% | 2.3 m/s | 5.5 |
| 2023 | 34.9°C | 28.1°C | 21.4°C | 43.7°C | 16.9°C | 58 mm | 52% | 2.8 m/s | 5.4 |
| 2022 | 34.1°C | 26.9°C | 19.7°C | 37.3°C | 14.1°C | 17 mm | 49% | 2.7 m/s | 6.1 |
| 2021 | 33.5°C | 26.7°C | 19.8°C | 38.0°C | 12.4°C | 30 mm | 51% | 2.8 m/s | 5.8 |
| 2020 | 27.9°C | 22.2°C | 16.4°C | 33.6°C | 8.1°C | 110 mm | 74% | 2.5 m/s | 4.9 |
| 2019 | 32.7°C | 27.6°C | 22.5°C | 36.8°C | 20.6°C | 79 mm | 67% | 2.8 m/s | 5.5 |
| 2018 | 28.3°C | 23.8°C | 19.2°C | 36.2°C | 8.9°C | 220 mm | 78% | 2.6 m/s | 4.4 |
| 2017 | 30.4°C | 24.4°C | 18.4°C | 36.9°C | 12.7°C | 109 mm | 62% | 2.7 m/s | 5 |
| 2016 | 30.0°C | 24.8°C | 19.6°C | 35.3°C | 9.7°C | 131 mm | 70% | 2.7 m/s | 5.3 |
| 2015 | 31.6°C | 25.9°C | 20.1°C | 36.5°C | 15.1°C | 42 mm | 63% | 2.8 m/s | 5.5 |
| 2014 | 31.0°C | 25.1°C | 19.2°C | 37.7°C | 10.4°C | 41 mm | 61% | 2.9 m/s | 5.1 |
| 2013 | 32.8°C | 26.3°C | 19.8°C | 40.9°C | 10.1°C | 58 mm | 53% | 2.7 m/s | 5.4 |
| 2012 | 32.4°C | 25.6°C | 18.9°C | 41.8°C | 13.6°C | 91 mm | 52% | 2.8 m/s | 5.1 |
| 2011 | 32.4°C | 24.8°C | 17.2°C | 40.5°C | 10.8°C | 36 mm | 41% | 3 m/s | 5.7 |
| 2010 | 31.0°C | 25.2°C | 19.3°C | 35.0°C | 8.6°C | 121 mm | 67% | 3.1 m/s | 5.6 |
| 2009 | 28.7°C | 22.9°C | 17.2°C | 37.1°C | 9.6°C | 114 mm | 66% | 2.8 m/s | 4.5 |
| 2008 | 29.6°C | 23.2°C | 16.8°C | 34.4°C | 10.5°C | 39 mm | 63% | 2.6 m/s | 5.4 |
| 2007 | 29.3°C | 23.9°C | 18.5°C | 33.0°C | 13.3°C | 49 mm | 75% | 2.6 m/s | 5.2 |
| 2006 | 29.5°C | 22.6°C | 15.8°C | 34.7°C | 10.8°C | 84 mm | 54% | 2.9 m/s | 5.5 |
| 2005 | 33.0°C | 26.2°C | 19.4°C | 35.7°C | 13.0°C | 74 mm | 57% | 2.7 m/s | 5.8 |
| 2004 | 31.7°C | 25.1°C | 18.6°C | 37.8°C | 12.7°C | 38 mm | 54% | 3 m/s | 5.6 |
| 2003 | 29.4°C | 23.0°C | 16.6°C | 33.9°C | 10.4°C | 38 mm | 60% | 3 m/s | 5 |
| 2002 | 32.1°C | 25.2°C | 18.3°C | 37.5°C | 11.3°C | 58 mm | 54% | 2.7 m/s | 5.6 |
| 2001 | 29.9°C | 23.4°C | 16.9°C | 35.7°C | 8.0°C | 76 mm | 62% | 2.5 m/s | 5.4 |
| 2000 | 34.6°C | 26.8°C | 19.0°C | 44.3°C | 6.4°C | 18 mm | 37% | 3.2 m/s | 6 |
| 1999 | 31.0°C | 24.2°C | 17.4°C | 37.5°C | 8.4°C | 61 mm | 51% | 3.1 m/s | 5.1 |
| 1998 🔥 | 36.2°C | 29.4°C | 22.6°C | 43.5°C | 17.5°C | 32 mm | 50% | 2.9 m/s | 5.4 |
| 1997 | 33.3°C | 26.6°C | 19.9°C | 38.7°C | 12.5°C | 55 mm | 54% | 3 m/s | 5.2 |
| 1996 | 27.4°C | 21.7°C | 16.0°C | 32.5°C | 6.2°C | 136 mm | 71% | 2.4 m/s | 4.9 |
| 1995 | 28.8°C | 23.1°C | 17.3°C | 40.8°C | 4.6°C | 147 mm | 66% | 2.7 m/s | 4.4 |
| 1994 | 30.5°C | 23.7°C | 16.9°C | 36.0°C | 7.3°C | 56 mm | 57% | 2.8 m/s | 5.4 |
| 1993 | 29.7°C | 22.9°C | 16.1°C | 34.5°C | 6.7°C | 110 mm | 60% | 3.1 m/s | 5.4 |
| 1992 | 29.9°C | 23.5°C | 17.1°C | 33.6°C | 9.9°C | 52 mm | 65% | 2.9 m/s | 5.5 |
| 1991 | 26.1°C | 21.2°C | 16.4°C | 32.6°C | 6.8°C | 182 mm | 76% | 2.6 m/s | 4.2 |
| 1990 | 31.7°C | 25.8°C | 19.8°C | 39.0°C | 9.6°C | 81 mm | 60% | 2.1 m/s | 5.1 |
| 1989 ❄️ | 27.6°C | 21.2°C | 14.8°C | 37.8°C | 3.0°C | 139 mm | 64% | 2.7 m/s | 5.3 |
| 1988 | 30.7°C | 23.8°C | 17.0°C | 37.7°C | 9.2°C | 184 mm | 61% | 2.6 m/s | 5.1 |
| 1987 | 29.6°C | 22.9°C | 16.2°C | 33.8°C | 9.8°C | 101 mm | 63% | 2.4 m/s | 5.4 |
| 1986 🌧️ | 29.0°C | 24.4°C | 19.7°C | 33.6°C | 11.4°C | 221 mm | 76% | 3.4 m/s | 4.3 |
| 1985 | 30.6°C | 24.7°C | 18.8°C | 39.5°C | 2.9°C | 106 mm | 55% | 3.6 m/s | 5.2 |
| 1984 | 30.7°C | 24.1°C | 17.4°C | 39.4°C | 3.2°C | 29 mm | 46% | 3.6 m/s | 4.9 |
| 1983 | 33.0°C | 26.1°C | 19.2°C | 38.5°C | 5.5°C | 14 mm | 48% | 3.6 m/s | — |
| 1982 | 30.6°C | 24.2°C | 17.9°C | 37.4°C | 9.0°C | 55 mm | 55% | 3.1 m/s | — |
| 1981 | 30.8°C | 24.7°C | 18.5°C | 35.7°C | 8.2°C | 32 mm | 58% | 2.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 30.9°C with lows near 18.3°C (mean 24.6°C), based on 45 years of NASA POWER data.
September averages 80 mm of rainfall in Lawton, about average for rainfall. The wettest on record was 221 mm in 1986.
The hottest September reached 44.3°C in 2000. The coldest dipped to 2.9°C in 1985.
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 31.1°C to 33.4°C and overnight lows from 18.4°C to 19.8°C over the same span.
September is one of the warmer months of the year in Lawton and about average for rainfall, so plan for around 30.9°C daytime highs and 18.3°C at night.
Not quite — September is the 9th coolest month in Lawton, averaging 24.6°C.
For September in Lawton, pack light, breathable clothing and sun protection, with typical highs of 30.9°C and lows of 18.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 59% — moderately humid.
Average wind speed in September is 2.8 m/s. The windiest September on record averaged 3.6 m/s (1983).
The wettest September on record was 1986 with 221 mm. On average, September sees 80 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 Lawton 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.
