September is one of the warmer months of the year in Columbus, with average highs near 30.9°C and lows around 18.2°C (mean 24.5°C). It is one of the drier months, averaging 88 mm of rainfall and 71% relative humidity across the period.
September is one of the warmer months of the year in Columbus. Across 45 years of records, the warmest September in Columbus was 2019 — when the month averaged 28.4°C — while the coldest was 1983 at 22°C. Typical September days reach 30.9°C with nights near 18.2°C. The long-term trend is warming, about 0.4°C per decade.
September is one of the drier months in Columbus, averaging 88 mm of rainfall. The wettest September on record was 2024 with 262 mm, while the driest was 1984 at 19 mm.
Relative humidity in Columbus during September averages 71%. The most humid September was 2009 at 83%, and the least humid was 1990 at 56%.
September receives about 4.8 kWh/m²/day of solar energy in Columbus. The sunniest September was 2019 at 5.8 kWh/m²/day, and the cloudiest was 1988 at 3.7.
Average wind speed in Columbus during September is 0.2 m/s. The windiest Septembers were 2021, 2022 and 2024, among others at 0.3 m/s, while the calmest were 2018, 2023 and 2025, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.8°C | 24.7°C | 24.0°C | 25.5°C | 24.8°C | +1°C |
| Avg High | 30.2°C | 31.3°C | 30.0°C | 32.1°C | 31.2°C | +1°C |
| Avg Low | 17.5°C | 18.1°C | 18.1°C | 19.0°C | 18.4°C | +0.9°C |
| Avg Rain | 88 mm | 85 mm | 95 mm | 74 mm | 107 mm | +19 mm |
September temperatures in Columbus have risen by about 1.5°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 6.5°C (1983) to a record high of 39.7°C (2019).
Rainfall in September is one of the drier months, averaging 88 mm, with a wettest year of 262 mm.
One of the best times to visit Columbus
September is one of the best times to visit Columbus. Expect days averaging 30.9°C and nights around 18.2°C (mean 24.5°C) — warmer than Columbus's yearly average — with higher rainfall (88 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 | 33.5°C | 26.0°C | 18.6°C | 36.4°C | 15.3°C | 32 mm | 62% | 0.2 m/s | 5.4 |
| 2024 🌧️ | 31.3°C | 25.6°C | 19.8°C | 37.4°C | 16.9°C | 262 mm | 74% | 0.3 m/s | 4.1 |
| 2023 | 32.8°C | 25.7°C | 18.6°C | 37.4°C | 14.1°C | 37 mm | 66% | 0.2 m/s | 5 |
| 2022 | 30.4°C | 23.9°C | 17.3°C | 36.8°C | 9.8°C | 56 mm | 70% | 0.3 m/s | 5.1 |
| 2021 | 29.5°C | 23.7°C | 17.9°C | 35.8°C | 9.4°C | 95 mm | 78% | 0.3 m/s | 5 |
| 2020 | 29.5°C | 23.9°C | 18.4°C | 37.0°C | 8.8°C | 158 mm | 76% | 0.3 m/s | 4.5 |
| 2019 🔥 | 36.0°C | 28.4°C | 20.7°C | 39.7°C | 15.1°C | 19 mm | 58% | 0.3 m/s | 5.8 |
| 2018 | 33.6°C | 27.5°C | 21.4°C | 37.5°C | 19.3°C | 66 mm | 73% | 0.2 m/s | 5.1 |
| 2017 | 30.1°C | 23.6°C | 17.2°C | 34.1°C | 11.7°C | 105 mm | 72% | 0.3 m/s | 5.2 |
| 2016 | 33.6°C | 26.8°C | 20.0°C | 36.7°C | 11.2°C | 48 mm | 67% | 0.2 m/s | 5.3 |
| 2015 | 29.6°C | 23.9°C | 18.3°C | 37.5°C | 10.6°C | 110 mm | 76% | 0.2 m/s | 4.3 |
| 2014 | 31.8°C | 25.6°C | 19.5°C | 36.2°C | 13.2°C | 88 mm | 73% | 0.2 m/s | 4.4 |
| 2013 | 30.3°C | 24.4°C | 18.4°C | 34.1°C | 12.8°C | 51 mm | 78% | 0.2 m/s | 4.9 |
| 2012 | 31.2°C | 24.6°C | 17.9°C | 35.1°C | 10.0°C | 79 mm | 70% | 0.2 m/s | 4.9 |
| 2011 | 30.2°C | 23.8°C | 17.4°C | 36.5°C | 13.0°C | 104 mm | 70% | 0.3 m/s | 4.6 |
| 2010 | 34.4°C | 26.7°C | 19.1°C | 38.4°C | 12.4°C | 65 mm | 59% | 0.2 m/s | 5.7 |
| 2009 | 28.6°C | 23.8°C | 19.1°C | 32.3°C | 9.2°C | 148 mm | 83% | 0.2 m/s | 4.4 |
| 2008 | 29.5°C | 23.7°C | 17.9°C | 32.9°C | 10.2°C | 38 mm | 77% | 0.2 m/s | 5.1 |
| 2007 | 31.5°C | 25.1°C | 18.6°C | 36.3°C | 11.2°C | 71 mm | 70% | 0.3 m/s | 4.9 |
| 2006 | 30.3°C | 23.7°C | 17.1°C | 35.5°C | 9.9°C | 73 mm | 70% | 0.2 m/s | 4.8 |
| 2005 | 32.1°C | 25.5°C | 18.9°C | 35.3°C | 15.2°C | 21 mm | 72% | 0.2 m/s | 5.5 |
| 2004 | 28.1°C | 23.1°C | 18.2°C | 32.6°C | 12.4°C | 239 mm | 81% | 0.3 m/s | 4.3 |
| 2003 | 28.4°C | 22.5°C | 16.6°C | 32.7°C | 7.0°C | 66 mm | 79% | 0.2 m/s | 5.1 |
| 2002 | 32.1°C | 26.4°C | 20.7°C | 38.0°C | 17.7°C | 115 mm | 73% | 0.3 m/s | 4 |
| 2001 | 30.0°C | 23.2°C | 16.4°C | 34.4°C | 7.1°C | 69 mm | 67% | 0.3 m/s | 5.1 |
| 2000 | 29.5°C | 23.4°C | 17.3°C | 34.1°C | 9.7°C | 110 mm | 75% | 0.3 m/s | 4.3 |
| 1999 | 32.1°C | 24.3°C | 16.5°C | 38.4°C | 7.8°C | 49 mm | 57% | 0.3 m/s | 5 |
| 1998 | 31.3°C | 25.4°C | 19.4°C | 36.8°C | 14.2°C | 183 mm | 71% | 0.3 m/s | 4.5 |
| 1997 | 33.3°C | 25.8°C | 18.3°C | 38.0°C | 11.9°C | 83 mm | 62% | 0.3 m/s | 5 |
| 1996 | 30.0°C | 23.6°C | 17.3°C | 34.5°C | 12.2°C | 125 mm | 74% | 0.2 m/s | 4.6 |
| 1995 | 31.9°C | 25.0°C | 18.1°C | 35.6°C | 13.0°C | 66 mm | 69% | 0.2 m/s | 4.8 |
| 1994 | 27.6°C | 22.3°C | 16.9°C | 32.1°C | 10.8°C | 98 mm | 83% | 0.2 m/s | 4.8 |
| 1993 | 32.0°C | 25.1°C | 18.2°C | 35.9°C | 7.7°C | 70 mm | 68% | 0.3 m/s | 4.8 |
| 1992 | 29.5°C | 24.2°C | 18.9°C | 33.2°C | 12.1°C | 80 mm | 79% | 0.2 m/s | 4.3 |
| 1991 | 31.1°C | 24.5°C | 18.0°C | 37.0°C | 8.5°C | 65 mm | 72% | 0.2 m/s | 5.1 |
| 1990 | 34.1°C | 26.5°C | 18.9°C | 39.1°C | 8.3°C | 30 mm | 56% | 0.3 m/s | 5.1 |
| 1989 | 28.7°C | 23.2°C | 17.7°C | 33.5°C | 11.7°C | 134 mm | 79% | 0.2 m/s | 4.2 |
| 1988 | 29.1°C | 23.9°C | 18.8°C | 33.6°C | 13.4°C | 175 mm | 81% | 0.2 m/s | 3.7 |
| 1987 | 30.8°C | 24.4°C | 17.9°C | 34.4°C | 11.5°C | 62 mm | 70% | 0.2 m/s | 4.7 |
| 1986 | 31.2°C | 25.2°C | 19.3°C | 35.8°C | 15.3°C | 91 mm | 77% | 0.2 m/s | 4.5 |
| 1985 | 30.8°C | 24.0°C | 17.1°C | 35.5°C | 8.4°C | 61 mm | 67% | 0.2 m/s | 5.1 |
| 1984 | 31.0°C | 23.7°C | 16.4°C | 35.8°C | 10.7°C | 19 mm | 65% | 0.2 m/s | 5 |
| 1983 ❄️ | 27.7°C | 22.0°C | 16.4°C | 34.5°C | 6.5°C | 152 mm | 78% | 0.3 m/s | — |
| 1982 | 30.3°C | 23.7°C | 17.1°C | 35.4°C | 8.2°C | 60 mm | 68% | 0.2 m/s | — |
| 1981 | 31.9°C | 24.2°C | 16.5°C | 35.2°C | 7.9°C | 39 mm | 61% | 0.3 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 18.2°C (mean 24.5°C), based on 45 years of NASA POWER data.
September averages 88 mm of rainfall in Columbus, one of the drier months. The wettest on record was 262 mm in 2024.
The hottest September reached 39.7°C in 2019. The coldest dipped to 6.5°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.5°C. Daytime highs moved from 30.3°C to 31.5°C and overnight lows from 16.7°C to 18.4°C over the same span.
September is one of the warmer months of the year in Columbus and one of the drier months, so plan for around 30.9°C daytime highs and 18.2°C at night.
Not quite — September is the 9th coolest month in Columbus, averaging 24.5°C.
For September in Columbus, pack light, breathable clothing and sun protection, with typical highs of 30.9°C and lows of 18.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 71% — moderately humid.
Average wind speed in September is 0.2 m/s. The windiest September on record averaged 0.3 m/s (1981).
The wettest September on record was 2024 with 262 mm. On average, September sees 88 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 Columbus 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.
