September is one of the warmer months of the year in Springdale, with average highs near 28.7°C and lows around 15.9°C (mean 22.3°C). It is about average for rainfall, averaging 105 mm of rainfall and 67% relative humidity across the period.
September is one of the warmer months of the year in Springdale. Across 45 years of records, the warmest September in Springdale was 1998 — when the month averaged 26°C — while the coldest were 1993 and 2006 at 19.7°C. Typical September days reach 28.7°C with nights near 15.9°C. The long-term trend is warming, about 0.5°C per decade.
September is about average for rainfall in Springdale, averaging 105 mm of rainfall. The wettest September on record was 1986 with 302 mm, while the driest was 2017 at 16 mm.
Relative humidity in Springdale during September averages 67%. The most humid September was 2009 at 82%, and the least humid was 2000 at 49%.
September receives about 4.9 kWh/m²/day of solar energy in Springdale. The sunniest September was 2004 at 5.7 kWh/m²/day, and the cloudiest was 1986 at 3.8.
Average wind speed in Springdale during September is 0.5 m/s. The windiest Septembers were 2010, 2011 and 2021, among others at 0.6 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.8°C | 21.6°C | 21.9°C | 23.1°C | 23.4°C | +1.6°C |
| Avg High | 28.2°C | 27.9°C | 28.4°C | 29.4°C | 30.2°C | +2°C |
| Avg Low | 15.3°C | 15.2°C | 15.5°C | 16.8°C | 16.7°C | +1.4°C |
| Avg Rain | 110 mm | 139 mm | 107 mm | 86 mm | 71 mm | -38 mm |
September temperatures in Springdale have risen by about 1.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 1.2°C (1984) to a record high of 42.1°C (2000).
Rainfall in September is about average for rainfall, averaging 105 mm, with a wettest year of 302 mm.
One of the best times to visit Springdale
September is one of the best times to visit Springdale. Expect days averaging 28.7°C and nights around 15.9°C (mean 22.3°C) — warmer than Springdale's yearly average — with higher rainfall (105 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 | 29.4°C | 23.2°C | 17.1°C | 34.8°C | 11.6°C | 130 mm | 68% | 0.5 m/s | 4.8 |
| 2024 | 30.5°C | 23.3°C | 16.2°C | 36.4°C | 9.5°C | 20 mm | 62% | 0.5 m/s | 5 |
| 2023 | 31.3°C | 24.3°C | 17.2°C | 36.9°C | 13.1°C | 115 mm | 63% | 0.5 m/s | 5.3 |
| 2022 | 30.9°C | 23.6°C | 16.3°C | 36.2°C | 8.4°C | 29 mm | 59% | 0.5 m/s | 5.6 |
| 2021 | 31.7°C | 24.7°C | 17.6°C | 35.9°C | 10.2°C | 52 mm | 60% | 0.6 m/s | 5.5 |
| 2020 | 27.2°C | 21.4°C | 15.6°C | 30.9°C | 6.7°C | 81 mm | 77% | 0.5 m/s | 4.7 |
| 2019 | 31.2°C | 25.8°C | 20.5°C | 35.8°C | 18.3°C | 110 mm | 73% | 0.5 m/s | 5.1 |
| 2018 | 28.7°C | 23.2°C | 17.6°C | 34.8°C | 9.0°C | 70 mm | 76% | 0.5 m/s | 4.5 |
| 2017 | 29.8°C | 23.0°C | 16.2°C | 34.1°C | 10.0°C | 16 mm | 63% | 0.5 m/s | 5.3 |
| 2016 | 30.3°C | 23.8°C | 17.3°C | 34.4°C | 9.4°C | 69 mm | 69% | 0.5 m/s | 5.4 |
| 2015 | 29.9°C | 23.6°C | 17.3°C | 34.8°C | 10.5°C | 57 mm | 67% | 0.5 m/s | 5.2 |
| 2014 | 28.5°C | 22.4°C | 16.4°C | 34.1°C | 9.3°C | 96 mm | 72% | 0.5 m/s | 4.8 |
| 2013 | 31.3°C | 24.0°C | 16.6°C | 36.7°C | 9.1°C | 66 mm | 61% | 0.5 m/s | 5.3 |
| 2012 | 29.5°C | 23.0°C | 16.5°C | 39.4°C | 9.6°C | 88 mm | 66% | 0.5 m/s | 4.8 |
| 2011 | 27.4°C | 20.5°C | 13.6°C | 37.4°C | 7.2°C | 88 mm | 59% | 0.6 m/s | 5 |
| 2010 | 27.7°C | 22.1°C | 16.5°C | 33.3°C | 8.8°C | 204 mm | 75% | 0.6 m/s | 5 |
| 2009 | 24.6°C | 19.8°C | 15.0°C | 29.7°C | 6.5°C | 233 mm | 82% | 0.5 m/s | 4.1 |
| 2008 | 25.7°C | 20.4°C | 15.2°C | 32.4°C | 7.6°C | 173 mm | 81% | 0.6 m/s | 4.7 |
| 2007 | 28.0°C | 22.4°C | 16.9°C | 34.4°C | 11.1°C | 146 mm | 75% | 0.5 m/s | 4.7 |
| 2006 | 26.2°C | 19.7°C | 13.2°C | 32.1°C | 5.4°C | 116 mm | 68% | 0.6 m/s | 5 |
| 2005 | 31.9°C | 25.1°C | 18.2°C | 36.2°C | 8.5°C | 71 mm | 64% | 0.5 m/s | 5.1 |
| 2004 | 30.4°C | 23.0°C | 15.7°C | 34.8°C | 11.0°C | 22 mm | 57% | 0.5 m/s | 5.7 |
| 2003 | 26.1°C | 20.1°C | 14.1°C | 30.1°C | 6.0°C | 83 mm | 72% | 0.5 m/s | 5.1 |
| 2002 | 31.2°C | 23.8°C | 16.5°C | 36.2°C | 9.1°C | 35 mm | 59% | 0.5 m/s | 5.3 |
| 2001 | 28.0°C | 21.2°C | 14.4°C | 35.1°C | 4.9°C | 103 mm | 65% | 0.5 m/s | 5.1 |
| 2000 | 31.8°C | 23.9°C | 16.0°C | 42.1°C | 4.2°C | 84 mm | 49% | 0.6 m/s | 5.3 |
| 1999 | 27.9°C | 20.9°C | 13.9°C | 36.0°C | 5.1°C | 106 mm | 61% | 0.6 m/s | 4.7 |
| 1998 🔥 | 32.1°C | 26.0°C | 19.8°C | 41.4°C | 14.5°C | 155 mm | 63% | 0.5 m/s | 5 |
| 1997 | 28.5°C | 21.9°C | 15.3°C | 34.0°C | 9.4°C | 97 mm | 68% | 0.6 m/s | 4.9 |
| 1996 | 27.2°C | 20.5°C | 13.9°C | 33.9°C | 4.1°C | 207 mm | 69% | 0.5 m/s | 4.5 |
| 1995 | 27.6°C | 21.1°C | 14.7°C | 37.7°C | 2.6°C | 109 mm | 63% | 0.6 m/s | 4.1 |
| 1994 | 27.7°C | 20.8°C | 14.0°C | 33.0°C | 5.7°C | 56 mm | 67% | 0.5 m/s | 4.9 |
| 1993 ❄️ | 26.0°C | 19.7°C | 13.5°C | 32.2°C | 5.2°C | 234 mm | 74% | 0.6 m/s | 4.6 |
| 1992 | 26.8°C | 20.6°C | 14.5°C | 32.7°C | 4.4°C | 148 mm | 74% | 0.6 m/s | 4.7 |
| 1991 | 25.3°C | 20.2°C | 15.0°C | 32.5°C | 5.7°C | 136 mm | 76% | 0.5 m/s | 4.5 |
| 1990 | 30.4°C | 24.1°C | 17.7°C | 38.7°C | 6.5°C | 145 mm | 64% | 0.5 m/s | 4.7 |
| 1989 | 26.0°C | 19.9°C | 13.7°C | 35.0°C | 1.6°C | 101 mm | 71% | 0.5 m/s | 4.3 |
| 1988 | 29.4°C | 22.5°C | 15.6°C | 35.2°C | 10.4°C | 132 mm | 66% | 0.5 m/s | 4.8 |
| 1987 | 27.5°C | 21.1°C | 14.7°C | 33.3°C | 7.7°C | 104 mm | 69% | 0.5 m/s | 4.8 |
| 1986 🌧️ | 27.4°C | 22.6°C | 17.9°C | 31.4°C | 11.1°C | 302 mm | 79% | 0.6 m/s | 3.8 |
| 1985 | 28.0°C | 21.7°C | 15.5°C | 39.4°C | 4.1°C | 107 mm | 65% | 0.6 m/s | 4.5 |
| 1984 | 27.7°C | 21.0°C | 14.4°C | 35.5°C | 1.2°C | 117 mm | 63% | 0.6 m/s | 4.6 |
| 1983 | 30.2°C | 23.0°C | 15.8°C | 36.5°C | 4.3°C | 41 mm | 55% | 0.6 m/s | — |
| 1982 | 29.2°C | 22.2°C | 15.1°C | 35.2°C | 5.2°C | 36 mm | 61% | 0.5 m/s | — |
| 1981 | 28.7°C | 21.9°C | 15.1°C | 32.7°C | 5.0°C | 47 mm | 65% | 0.5 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 28.7°C with lows near 15.9°C (mean 22.3°C), based on 45 years of NASA POWER data.
September averages 105 mm of rainfall in Springdale, about average for rainfall. The wettest on record was 302 mm in 1986.
The hottest September reached 42.1°C in 2000. The coldest dipped to 1.2°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 28.8°C to 30.8°C and overnight lows from 15.2°C to 16.9°C over the same span.
September is one of the warmer months of the year in Springdale and about average for rainfall, so plan for around 28.7°C daytime highs and 15.9°C at night.
Not quite — September is the 9th coolest month in Springdale, averaging 22.3°C.
For September in Springdale, pack light layers you can adjust through the day, with typical highs of 28.7°C and lows of 15.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 67% — moderately humid.
Average wind speed in September is 0.5 m/s. The windiest September on record averaged 0.6 m/s (1983).
The wettest September on record was 1986 with 302 mm. On average, September sees 105 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 Springdale 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.
