September is one of the warmer months of the year in Conway, with average highs near 30.7°C and lows around 17.6°C (mean 24.2°C). It is one of the drier months, averaging 81 mm of rainfall and 64% relative humidity across the period.
September is one of the warmer months of the year in Conway. Across 45 years of records, the warmest September in Conway was 2019 — when the month averaged 28°C — while the coldest was 2008 at 21.3°C. Typical September days reach 30.7°C with nights near 17.6°C. The long-term trend is warming, about 0.3°C per decade.
September is one of the drier months in Conway, averaging 81 mm of rainfall. The wettest September on record was 2009 with 227 mm, while the driest was 2017 at 6 mm.
Relative humidity in Conway during September averages 64%. The most humid September was 2020 at 83%, and the least humid was 1999 at 47%.
September receives about 4.8 kWh/m²/day of solar energy in Conway. The sunniest September was 2016 at 5.5 kWh/m²/day, and the cloudiest was 2009 at 3.8.
Average wind speed in Conway during September is 1.4 m/s. The windiest September was 2008 at 1.7 m/s, while the calmest was 2025 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.9°C | 24.0°C | 23.7°C | 24.8°C | 24.7°C | +0.8°C |
| Avg High | 30.7°C | 30.8°C | 30.1°C | 31.2°C | 31.1°C | +0.4°C |
| Avg Low | 17.1°C | 17.1°C | 17.3°C | 18.3°C | 18.2°C | +1.1°C |
| Avg Rain | 74 mm | 79 mm | 113 mm | 62 mm | 72 mm | -2 mm |
September temperatures in Conway have risen by about 1.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 4.6°C (1989) to a record high of 42.7°C (2000).
Rainfall in September is one of the drier months, averaging 81 mm, with a wettest year of 227 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.1°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
One of the best times to visit Conway
September is one of the best times to visit Conway. Expect days averaging 30.7°C and nights around 17.6°C (mean 24.2°C) — warmer than Conway's yearly average — with higher rainfall (81 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 | 31.2°C | 24.9°C | 18.7°C | 36.2°C | 11.7°C | 108 mm | 66% | 1 m/s | 5 |
| 2024 | 30.9°C | 24.6°C | 18.3°C | 37.2°C | 10.7°C | 44 mm | 63% | 1.5 m/s | 4.3 |
| 2023 | 33.6°C | 26.3°C | 18.9°C | 40.2°C | 14.4°C | 44 mm | 56% | 1.3 m/s | 5.2 |
| 2022 | 32.0°C | 24.9°C | 17.7°C | 38.6°C | 9.5°C | 38 mm | 59% | 1.3 m/s | 5.4 |
| 2021 | 32.3°C | 25.4°C | 18.5°C | 37.8°C | 10.6°C | 50 mm | 64% | 1.4 m/s | 5.1 |
| 2020 | 26.7°C | 21.8°C | 16.9°C | 31.0°C | 8.5°C | 151 mm | 83% | 1.3 m/s | 4.5 |
| 2019 🔥 | 34.4°C | 28.0°C | 21.6°C | 38.2°C | 18.2°C | 53 mm | 67% | 1.3 m/s | 5.1 |
| 2018 | 29.5°C | 24.5°C | 19.5°C | 35.6°C | 13.5°C | 170 mm | 79% | 1.3 m/s | 4.5 |
| 2017 | 31.0°C | 24.3°C | 17.5°C | 35.0°C | 10.7°C | 6 mm | 63% | 1.3 m/s | 5.4 |
| 2016 | 31.1°C | 25.1°C | 19.0°C | 34.3°C | 11.6°C | 45 mm | 71% | 1.2 m/s | 5.5 |
| 2015 | 31.8°C | 25.0°C | 18.3°C | 37.2°C | 10.2°C | 45 mm | 62% | 1.3 m/s | 5 |
| 2014 | 30.9°C | 24.5°C | 18.1°C | 37.1°C | 10.9°C | 31 mm | 66% | 1.2 m/s | 4.6 |
| 2013 | 32.9°C | 25.8°C | 18.7°C | 39.0°C | 11.0°C | 58 mm | 59% | 1.3 m/s | 5.2 |
| 2012 | 28.7°C | 22.9°C | 17.1°C | 38.8°C | 8.7°C | 118 mm | 75% | 1.3 m/s | 4.9 |
| 2011 | 29.9°C | 22.6°C | 15.3°C | 37.2°C | 10.0°C | 44 mm | 59% | 1.4 m/s | 4.9 |
| 2010 | 32.1°C | 25.2°C | 18.4°C | 36.6°C | 10.4°C | 50 mm | 62% | 1.5 m/s | 4.8 |
| 2009 🌧️ | 26.4°C | 21.7°C | 17.0°C | 31.9°C | 8.2°C | 227 mm | 83% | 1.5 m/s | 3.8 |
| 2008 ❄️ | 26.2°C | 21.3°C | 16.4°C | 32.2°C | 10.8°C | 212 mm | 82% | 1.7 m/s | 4.7 |
| 2007 | 29.1°C | 23.6°C | 18.2°C | 35.0°C | 11.1°C | 170 mm | 74% | 1.3 m/s | 4.5 |
| 2006 | 29.2°C | 22.2°C | 15.2°C | 35.2°C | 6.6°C | 118 mm | 64% | 1.5 m/s | 4.9 |
| 2005 | 33.4°C | 26.7°C | 20.1°C | 38.8°C | 8.8°C | 117 mm | 60% | 1.5 m/s | 5 |
| 2004 | 32.0°C | 24.6°C | 17.1°C | 35.5°C | 11.7°C | 6 mm | 54% | 1.4 m/s | 5.4 |
| 2003 | 28.9°C | 22.4°C | 15.9°C | 32.9°C | 7.1°C | 85 mm | 67% | 1.4 m/s | 5.1 |
| 2002 | 32.2°C | 25.4°C | 18.6°C | 37.0°C | 10.3°C | 74 mm | 61% | 1.5 m/s | 5 |
| 2001 | 30.4°C | 23.3°C | 16.3°C | 35.3°C | 7.8°C | 57 mm | 61% | 1.4 m/s | 5.1 |
| 2000 | 32.8°C | 25.5°C | 18.2°C | 42.7°C | 6.6°C | 61 mm | 50% | 1.6 m/s | 4.8 |
| 1999 | 31.8°C | 24.3°C | 16.8°C | 37.8°C | 8.7°C | 35 mm | 47% | 1.4 m/s | 5.3 |
| 1998 | 33.5°C | 27.0°C | 20.4°C | 41.1°C | 14.2°C | 94 mm | 60% | 1.5 m/s | 4.8 |
| 1997 | 31.8°C | 24.6°C | 17.4°C | 37.3°C | 10.9°C | 76 mm | 57% | 1.4 m/s | 4.8 |
| 1996 | 29.4°C | 22.7°C | 16.0°C | 35.9°C | 6.3°C | 149 mm | 66% | 1.4 m/s | 4.6 |
| 1995 | 30.6°C | 23.6°C | 16.6°C | 40.1°C | 6.1°C | 46 mm | 56% | 1.3 m/s | 4.1 |
| 1994 | 30.3°C | 22.7°C | 15.1°C | 34.9°C | 6.5°C | 59 mm | 64% | 1.3 m/s | 5.1 |
| 1993 | 30.9°C | 23.4°C | 16.0°C | 37.7°C | 9.1°C | 80 mm | 62% | 1.5 m/s | 4.6 |
| 1992 | 29.9°C | 23.2°C | 16.5°C | 36.4°C | 6.3°C | 76 mm | 67% | 1.4 m/s | 4.5 |
| 1991 | 27.8°C | 22.4°C | 17.0°C | 33.9°C | 6.8°C | 71 mm | 73% | 1.2 m/s | 4.6 |
| 1990 | 32.0°C | 25.8°C | 19.5°C | 40.6°C | 7.3°C | 105 mm | 64% | 1.2 m/s | 4.3 |
| 1989 | 27.9°C | 21.8°C | 15.7°C | 36.8°C | 4.6°C | 104 mm | 72% | 1.4 m/s | 4.3 |
| 1988 | 31.9°C | 25.0°C | 18.0°C | 36.9°C | 9.9°C | 119 mm | 64% | 1.4 m/s | 4.5 |
| 1987 | 31.5°C | 24.5°C | 17.4°C | 36.5°C | 10.9°C | 109 mm | 59% | 1.2 m/s | 4.7 |
| 1986 | 31.9°C | 25.7°C | 19.6°C | 34.9°C | 13.6°C | 49 mm | 68% | 1.4 m/s | 4.5 |
| 1985 | 29.6°C | 23.1°C | 16.6°C | 38.7°C | 6.8°C | 107 mm | 65% | 1.6 m/s | 4.5 |
| 1984 | 29.1°C | 22.4°C | 15.7°C | 35.7°C | 6.0°C | 91 mm | 66% | 1.6 m/s | 4.8 |
| 1983 | 32.4°C | 25.0°C | 17.6°C | 37.1°C | 7.6°C | 26 mm | 53% | 1.5 m/s | — |
| 1982 | 30.8°C | 23.7°C | 16.6°C | 36.6°C | 7.0°C | 33 mm | 61% | 1.4 m/s | — |
| 1981 | 31.0°C | 23.7°C | 16.4°C | 35.3°C | 7.3°C | 28 mm | 60% | 1.2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 30.7°C with lows near 17.6°C (mean 24.2°C), based on 45 years of NASA POWER data.
September averages 81 mm of rainfall in Conway, one of the drier months. The wettest on record was 227 mm in 2009.
The hottest September reached 42.7°C in 2000. The coldest dipped to 4.6°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.6°C. Daytime highs moved from 30.6°C to 32°C and overnight lows from 16.6°C to 18.4°C over the same span.
September is one of the warmer months of the year in Conway and one of the drier months, so plan for around 30.7°C daytime highs and 17.6°C at night.
Not quite — September is the 9th coolest month in Conway, averaging 24.2°C.
For September in Conway, pack light, breathable clothing and sun protection, with typical highs of 30.7°C and lows of 17.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 64% — moderately humid.
Average wind speed in September is 1.4 m/s. The windiest September on record averaged 1.7 m/s (2008).
The wettest September on record was 2009 with 227 mm. On average, September sees 81 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 Conway 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.
