September is one of the warmer months of the year in Saint Cloud, with average highs near 30°C and lows around 22.9°C (mean 26.5°C). It is a relatively wet time of year, averaging 173 mm of rainfall and 84% relative humidity across the period.
September is one of the warmer months of the year in Saint Cloud. Across 45 years of records, the warmest September in Saint Cloud was 2024 — when the month averaged 28.1°C — while the coldest was 2001 at 25.1°C. Typical September days reach 30°C with nights near 22.9°C. The long-term trend is warming, about 0.3°C per decade.
September is a relatively wet time of year in Saint Cloud, averaging 173 mm of rainfall. The wettest September on record was 2004 with 385 mm, while the driest was 2019 at 62 mm.
Relative humidity in Saint Cloud during September averages 84%. The most humid September was 1994 at 89%, and the least humid was 2010 at 75%.
September receives about 4.9 kWh/m²/day of solar energy in Saint Cloud. The sunniest September was 2019 at 5.5 kWh/m²/day, and the cloudiest was 1998 at 4.1.
Average wind speed in Saint Cloud during September is 2 m/s. The windiest September was 2004 at 3.7 m/s, while the calmest was 2015 at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.0°C | 26.3°C | 26.3°C | 26.8°C | 27.3°C | +1.3°C |
| Avg High | 29.6°C | 29.7°C | 29.8°C | 30.5°C | 31.0°C | +1.4°C |
| Avg Low | 22.4°C | 22.8°C | 22.9°C | 23.1°C | 23.6°C | +1.2°C |
| Avg Rain | 154 mm | 173 mm | 185 mm | 165 mm | 199 mm | +44 mm |
September temperatures in Saint Cloud have risen by about 1.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 14.4°C (1981) to a record high of 35°C (2023).
Rainfall in September is a relatively wet time of year, averaging 173 mm, with a wettest year of 385 mm.
A quieter season to visit Saint Cloud
If your dates are flexible, the more temperate months of April and November tend to be the most comfortable for visiting Saint Cloud. That said, September — with days averaging 30°C and nights around 22.9°C (mean 26.5°C) and higher rainfall (173 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 31.1°C | 27.3°C | 23.4°C | 33.7°C | 20.4°C | 117 mm | 83% | 1.8 m/s | 4.9 |
| 2024 🔥 | 31.7°C | 28.1°C | 24.5°C | 33.3°C | 22.5°C | 167 mm | 85% | 1.9 m/s | 4.6 |
| 2023 | 32.1°C | 27.8°C | 23.6°C | 35.0°C | 19.4°C | 203 mm | 78% | 1.5 m/s | 5.3 |
| 2022 | 30.6°C | 26.9°C | 23.2°C | 34.1°C | 15.7°C | 359 mm | 85% | 1.8 m/s | 4.6 |
| 2021 | 30.2°C | 26.6°C | 23.0°C | 32.0°C | 20.0°C | 162 mm | 84% | 1.5 m/s | 5 |
| 2020 | 30.1°C | 26.8°C | 23.6°C | 33.6°C | 17.0°C | 183 mm | 86% | 2.1 m/s | 4.7 |
| 2019 | 31.1°C | 27.1°C | 23.0°C | 33.0°C | 19.4°C | 62 mm | 80% | 3 m/s | 5.5 |
| 2018 | 30.6°C | 27.1°C | 23.7°C | 32.6°C | 22.8°C | 93 mm | 86% | 1.7 m/s | 5.2 |
| 2017 | 30.2°C | 26.8°C | 23.3°C | 32.2°C | 20.6°C | 317 mm | 86% | 2.3 m/s | 4.9 |
| 2016 | 30.4°C | 27.0°C | 23.5°C | 32.5°C | 21.6°C | 195 mm | 86% | 1.6 m/s | 4.9 |
| 2015 | 29.9°C | 26.6°C | 23.4°C | 31.9°C | 21.3°C | 159 mm | 87% | 1.4 m/s | 4.7 |
| 2014 | 30.1°C | 26.6°C | 23.0°C | 33.7°C | 21.5°C | 271 mm | 84% | 1.5 m/s | 4.5 |
| 2013 | 29.9°C | 26.3°C | 22.6°C | 31.7°C | 19.9°C | 144 mm | 84% | 1.8 m/s | 5.1 |
| 2012 | 29.5°C | 25.8°C | 22.2°C | 31.8°C | 19.9°C | 154 mm | 85% | 1.7 m/s | 5 |
| 2011 | 30.9°C | 26.9°C | 22.9°C | 32.8°C | 20.7°C | 133 mm | 82% | 1.6 m/s | 5.3 |
| 2010 | 32.1°C | 27.7°C | 23.3°C | 34.9°C | 19.7°C | 119 mm | 75% | 2.2 m/s | 5.3 |
| 2009 | 29.8°C | 26.4°C | 22.9°C | 31.4°C | 16.9°C | 149 mm | 86% | 1.6 m/s | 5 |
| 2008 | 29.4°C | 26.0°C | 22.6°C | 31.6°C | 17.4°C | 84 mm | 87% | 2.4 m/s | 5.2 |
| 2007 | 30.3°C | 26.8°C | 23.3°C | 32.4°C | 21.5°C | 177 mm | 83% | 2 m/s | 4.8 |
| 2006 | 30.3°C | 26.1°C | 22.0°C | 32.0°C | 16.6°C | 119 mm | 82% | 1.6 m/s | 5.3 |
| 2005 | 30.7°C | 26.9°C | 23.1°C | 33.0°C | 20.5°C | 113 mm | 82% | 2.4 m/s | 5 |
| 2004 🌧️ | 29.2°C | 26.4°C | 23.6°C | 31.4°C | 20.7°C | 385 mm | 89% | 3.7 m/s | 4.5 |
| 2003 | 29.2°C | 25.9°C | 22.5°C | 31.1°C | 19.7°C | 153 mm | 88% | 2 m/s | 4.8 |
| 2002 | 30.2°C | 26.8°C | 23.5°C | 32.0°C | 22.2°C | 147 mm | 88% | 1.9 m/s | 4.8 |
| 2001 ❄️ | 28.2°C | 25.1°C | 21.9°C | 30.9°C | 16.1°C | 348 mm | 89% | 1.9 m/s | 4.4 |
| 2000 | 30.4°C | 26.8°C | 23.1°C | 33.4°C | 21.2°C | 170 mm | 83% | 2.1 m/s | 4.7 |
| 1999 | 29.9°C | 26.2°C | 22.4°C | 33.6°C | 19.1°C | 209 mm | 84% | 2.3 m/s | 4.8 |
| 1998 | 29.7°C | 26.6°C | 23.6°C | 33.9°C | 20.1°C | 241 mm | 87% | 2.3 m/s | 4.1 |
| 1997 | 29.6°C | 25.9°C | 22.2°C | 31.0°C | 18.9°C | 159 mm | 85% | 2 m/s | 5.2 |
| 1996 | 31.0°C | 26.9°C | 22.7°C | 32.6°C | 19.2°C | 113 mm | 79% | 1.9 m/s | 5.1 |
| 1995 | 29.8°C | 26.4°C | 23.0°C | 31.0°C | 19.9°C | 167 mm | 87% | 1.5 m/s | 5.2 |
| 1994 | 28.5°C | 25.5°C | 22.5°C | 31.5°C | 20.0°C | 258 mm | 89% | 1.7 m/s | 4.5 |
| 1993 | 29.8°C | 26.4°C | 23.0°C | 33.0°C | 18.2°C | 152 mm | 84% | 1.7 m/s | 4.9 |
| 1992 | 29.0°C | 25.9°C | 22.9°C | 31.2°C | 20.8°C | 164 mm | 88% | 1.8 m/s | 4.7 |
| 1991 | 29.6°C | 26.1°C | 22.6°C | 31.3°C | 15.1°C | 137 mm | 87% | 2 m/s | 5.3 |
| 1990 | 30.3°C | 26.6°C | 22.9°C | 32.5°C | 18.1°C | 131 mm | 82% | 2 m/s | 5.1 |
| 1989 | 30.4°C | 26.8°C | 23.2°C | 32.4°C | 20.7°C | 170 mm | 84% | 1.9 m/s | 5.1 |
| 1988 | 30.0°C | 26.5°C | 23.0°C | 31.7°C | 19.4°C | 118 mm | 85% | 2.4 m/s | 4.7 |
| 1987 | 30.6°C | 26.8°C | 23.0°C | 34.6°C | 20.4°C | 193 mm | 80% | 1.5 m/s | 4.5 |
| 1986 | 30.3°C | 26.4°C | 22.6°C | 31.9°C | 21.2°C | 109 mm | 82% | 1.7 m/s | 5.2 |
| 1985 | 28.5°C | 25.3°C | 22.1°C | 31.0°C | 20.7°C | 207 mm | 87% | 2.4 m/s | 4.9 |
| 1984 | 29.5°C | 25.6°C | 21.8°C | 32.4°C | 18.8°C | 129 mm | 80% | 2.8 m/s | 4.9 |
| 1983 | 28.7°C | 25.5°C | 22.2°C | 31.7°C | 15.9°C | 125 mm | 85% | 2 m/s | — |
| 1982 | 28.9°C | 25.6°C | 22.2°C | 32.9°C | 17.1°C | 196 mm | 87% | 1.8 m/s | — |
| 1981 | 29.2°C | 25.4°C | 21.7°C | 31.4°C | 14.4°C | 143 mm | 83% | 1.8 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 30°C with lows near 22.9°C (mean 26.5°C), based on 45 years of NASA POWER data.
September averages 173 mm of rainfall in Saint Cloud, a relatively wet time of year. The wettest on record was 385 mm in 2004.
The hottest September reached 35°C in 2023. The coldest dipped to 14.4°C in 1981.
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 29°C to 31.1°C and overnight lows from 22°C to 23.5°C over the same span.
September is one of the warmer months of the year in Saint Cloud and a relatively wet time of year, so plan for around 30°C daytime highs and 22.9°C at night.
Not quite — September is the 9th coolest month in Saint Cloud, averaging 26.5°C.
For September in Saint Cloud, pack light, breathable clothing and sun protection, with typical highs of 30°C and lows of 22.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 84% — quite humid.
Average wind speed in September is 2 m/s. The windiest September on record averaged 3.7 m/s (2004).
The wettest September on record was 2004 with 385 mm. On average, September sees 173 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 Saint Cloud 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.
