September is one of the warmer months of the year in Little Rock, with average highs near 31.5°C and lows around 17.7°C (mean 24.6°C). It is one of the drier months, averaging 77 mm of rainfall and 65% relative humidity across the period.
September is one of the warmer months of the year in Little Rock. Across 45 years of records, the warmest September in Little Rock was 2019 — when the month averaged 28.9°C — while the coldest was 2008 at 22°C. Typical September days reach 31.5°C with nights near 17.7°C. The long-term trend is warming, about 0.3°C per decade.
September is one of the drier months in Little Rock, averaging 77 mm of rainfall. The wettest September on record was 2008 with 221 mm, while the driest was 2017 at 8 mm.
Relative humidity in Little Rock during September averages 65%. The most humid September was 2009 at 83%, and the least humid was 1999 at 48%.
September receives about 4.9 kWh/m²/day of solar energy in Little Rock. The sunniest September was 2022 at 5.6 kWh/m²/day, and the cloudiest was 2009 at 4.
Average wind speed in Little Rock during September is 0.4 m/s. The windiest Septembers were 2000 and 2008 at 0.5 m/s, while the calmest were 2019, 2022 and 2023, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.2°C | 24.4°C | 24.2°C | 25.4°C | 25.2°C | +1°C |
| Avg High | 31.2°C | 31.6°C | 30.8°C | 32.2°C | 32.1°C | +0.9°C |
| Avg Low | 17.2°C | 17.3°C | 17.5°C | 18.6°C | 18.4°C | +1.2°C |
| Avg Rain | 75 mm | 73 mm | 108 mm | 59 mm | 67 mm | -7 mm |
September temperatures in Little Rock have risen by about 2.1°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 5.4°C (1989) to a record high of 43.2°C (2000).
Rainfall in September is one of the drier months, averaging 77 mm, with a wettest year of 221 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°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 Little Rock
September is one of the best times to visit Little Rock. Expect days averaging 31.5°C and nights around 17.7°C (mean 24.6°C) — warmer than Little Rock's yearly average — with moderate rainfall (77 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 | 32.6°C | 25.7°C | 18.8°C | 37.6°C | 11.3°C | 85 mm | 66% | 0.4 m/s | 5 |
| 2024 | 31.7°C | 25.2°C | 18.7°C | 37.8°C | 11.5°C | 42 mm | 63% | 0.4 m/s | 4.3 |
| 2023 | 34.5°C | 26.7°C | 18.9°C | 40.0°C | 14.2°C | 39 mm | 57% | 0.3 m/s | 5 |
| 2022 | 33.3°C | 25.6°C | 18.0°C | 39.4°C | 10.1°C | 41 mm | 59% | 0.3 m/s | 5.6 |
| 2021 | 32.8°C | 25.6°C | 18.5°C | 37.6°C | 10.9°C | 41 mm | 65% | 0.4 m/s | 5 |
| 2020 | 27.8°C | 22.6°C | 17.4°C | 33.0°C | 8.9°C | 155 mm | 83% | 0.4 m/s | 4.3 |
| 2019 🔥 | 35.9°C | 28.9°C | 22.0°C | 40.3°C | 19.1°C | 26 mm | 64% | 0.3 m/s | 5.3 |
| 2018 | 30.3°C | 24.9°C | 19.5°C | 37.3°C | 13.5°C | 189 mm | 80% | 0.3 m/s | 4.2 |
| 2017 | 31.8°C | 24.7°C | 17.7°C | 36.5°C | 10.5°C | 8 mm | 64% | 0.4 m/s | 5.3 |
| 2016 | 31.7°C | 25.4°C | 19.1°C | 34.7°C | 12.1°C | 44 mm | 73% | 0.4 m/s | 5.5 |
| 2015 | 33.3°C | 25.9°C | 18.5°C | 38.4°C | 10.6°C | 20 mm | 59% | 0.3 m/s | 5.1 |
| 2014 | 32.0°C | 25.2°C | 18.4°C | 37.6°C | 10.9°C | 28 mm | 66% | 0.4 m/s | 4.9 |
| 2013 | 33.6°C | 26.2°C | 18.8°C | 39.5°C | 11.5°C | 75 mm | 59% | 0.4 m/s | 5.2 |
| 2012 | 29.3°C | 23.3°C | 17.3°C | 40.1°C | 8.6°C | 130 mm | 78% | 0.4 m/s | 4.9 |
| 2011 | 30.7°C | 23.0°C | 15.4°C | 38.8°C | 10.7°C | 33 mm | 59% | 0.4 m/s | 5.2 |
| 2010 | 33.2°C | 26.0°C | 18.9°C | 38.3°C | 10.6°C | 34 mm | 61% | 0.4 m/s | 5.1 |
| 2009 | 27.3°C | 22.4°C | 17.4°C | 33.9°C | 8.6°C | 202 mm | 83% | 0.4 m/s | 4 |
| 2008 ❄️ 🌧️ | 27.2°C | 22.0°C | 16.7°C | 32.6°C | 11.4°C | 221 mm | 82% | 0.5 m/s | 4.6 |
| 2007 | 30.6°C | 24.5°C | 18.4°C | 34.9°C | 11.1°C | 147 mm | 73% | 0.3 m/s | 4.6 |
| 2006 | 29.7°C | 22.5°C | 15.3°C | 35.9°C | 6.3°C | 123 mm | 66% | 0.4 m/s | 5.2 |
| 2005 | 33.9°C | 26.9°C | 20.0°C | 40.1°C | 8.5°C | 121 mm | 61% | 0.4 m/s | 5.2 |
| 2004 | 32.7°C | 25.1°C | 17.4°C | 35.9°C | 11.6°C | 9 mm | 55% | 0.4 m/s | 5.5 |
| 2003 | 29.9°C | 23.2°C | 16.5°C | 34.4°C | 7.3°C | 82 mm | 67% | 0.4 m/s | 5.1 |
| 2002 | 32.7°C | 25.7°C | 18.7°C | 37.6°C | 10.5°C | 69 mm | 62% | 0.4 m/s | 4.9 |
| 2001 | 30.4°C | 23.5°C | 16.6°C | 34.4°C | 8.5°C | 45 mm | 63% | 0.4 m/s | 5.1 |
| 2000 | 33.1°C | 25.7°C | 18.3°C | 43.2°C | 7.4°C | 59 mm | 51% | 0.5 m/s | 5 |
| 1999 | 32.3°C | 24.5°C | 16.7°C | 38.2°C | 8.4°C | 41 mm | 48% | 0.4 m/s | 5.4 |
| 1998 | 33.8°C | 27.0°C | 20.3°C | 41.0°C | 15.3°C | 111 mm | 62% | 0.4 m/s | 5 |
| 1997 | 32.6°C | 25.0°C | 17.4°C | 37.6°C | 11.1°C | 68 mm | 59% | 0.4 m/s | 5 |
| 1996 | 30.1°C | 23.1°C | 16.2°C | 35.7°C | 7.3°C | 132 mm | 67% | 0.4 m/s | 4.7 |
| 1995 | 31.7°C | 24.4°C | 17.0°C | 41.0°C | 7.4°C | 39 mm | 55% | 0.4 m/s | 4.3 |
| 1994 | 30.5°C | 22.7°C | 14.9°C | 35.5°C | 6.0°C | 76 mm | 68% | 0.3 m/s | 5.2 |
| 1993 | 32.1°C | 24.3°C | 16.5°C | 38.4°C | 9.7°C | 46 mm | 61% | 0.4 m/s | 4.8 |
| 1992 | 30.8°C | 23.8°C | 16.8°C | 37.1°C | 7.1°C | 60 mm | 66% | 0.4 m/s | 4.6 |
| 1991 | 29.3°C | 23.3°C | 17.2°C | 36.1°C | 6.6°C | 63 mm | 72% | 0.3 m/s | 4.7 |
| 1990 | 33.0°C | 26.2°C | 19.5°C | 41.5°C | 7.2°C | 95 mm | 64% | 0.3 m/s | 4.6 |
| 1989 | 28.3°C | 22.1°C | 16.0°C | 35.6°C | 5.4°C | 97 mm | 74% | 0.4 m/s | 4.3 |
| 1988 | 32.6°C | 25.5°C | 18.4°C | 37.1°C | 9.6°C | 104 mm | 65% | 0.4 m/s | 4.5 |
| 1987 | 32.3°C | 25.0°C | 17.6°C | 37.5°C | 11.7°C | 111 mm | 59% | 0.4 m/s | 4.8 |
| 1986 | 32.6°C | 26.2°C | 19.8°C | 35.5°C | 14.3°C | 54 mm | 68% | 0.4 m/s | 4.5 |
| 1985 | 30.2°C | 23.4°C | 16.6°C | 38.8°C | 6.7°C | 98 mm | 66% | 0.4 m/s | 4.5 |
| 1984 | 29.3°C | 22.6°C | 15.9°C | 36.5°C | 5.9°C | 91 mm | 68% | 0.4 m/s | 4.9 |
| 1983 | 32.7°C | 25.1°C | 17.6°C | 37.6°C | 7.4°C | 41 mm | 55% | 0.4 m/s | — |
| 1982 | 31.3°C | 23.8°C | 16.4°C | 37.0°C | 6.6°C | 38 mm | 63% | 0.4 m/s | — |
| 1981 | 31.3°C | 23.8°C | 16.3°C | 36.2°C | 7.0°C | 40 mm | 62% | 0.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 31.5°C with lows near 17.7°C (mean 24.6°C), based on 45 years of NASA POWER data.
September averages 77 mm of rainfall in Little Rock, one of the drier months. The wettest on record was 221 mm in 2008.
The hottest September reached 43.2°C in 2000. The coldest dipped to 5.4°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2.1°C. Daytime highs moved from 31°C to 33°C and overnight lows from 16.6°C to 18.6°C over the same span.
September is one of the warmer months of the year in Little Rock and one of the drier months, so plan for around 31.5°C daytime highs and 17.7°C at night.
Not quite — September is the 9th coolest month in Little Rock, averaging 24.6°C.
For September in Little Rock, pack light, breathable clothing and sun protection, with typical highs of 31.5°C and lows of 17.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 65% — moderately humid.
Average wind speed in September is 0.4 m/s. The windiest September on record averaged 0.5 m/s (2000).
The wettest September on record was 2008 with 221 mm. On average, September sees 77 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 Little Rock 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.
