September is one of the warmer months of the year in Sanford, with average highs near 30°C and lows around 22.7°C (mean 26.4°C). It is a relatively wet time of year, averaging 172 mm of rainfall and 83% relative humidity across the period.
September is one of the warmer months of the year in Sanford. Across 45 years of records, the warmest September in Sanford was 2023 — when the month averaged 27.7°C — while the coldest was 2001 at 25°C. Typical September days reach 30°C with nights near 22.7°C. The long-term trend is warming, about 0.3°C per decade.
September is a relatively wet time of year in Sanford, averaging 172 mm of rainfall. The wettest September on record was 2004 with 406 mm, while the driest was 2018 at 63 mm.
Relative humidity in Sanford during September averages 83%. The most humid September was 2004 at 88%, and the least humid was 1990 at 73%.
September receives about 4.9 kWh/m²/day of solar energy in Sanford. The sunniest September was 2019 at 5.5 kWh/m²/day, and the cloudiest was 1998 at 4.1.
Average wind speed in Sanford during September is 1.7 m/s. The windiest September was 2004 at 3.3 m/s, while the calmest were 1987, 2015 and 2021 at 1.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.8°C | 26.4°C | 26.2°C | 26.7°C | 27.0°C | +1.2°C |
| Avg High | 29.3°C | 30.0°C | 29.7°C | 30.5°C | 30.7°C | +1.4°C |
| Avg Low | 22.3°C | 22.7°C | 22.7°C | 22.9°C | 23.3°C | +1°C |
| Avg Rain | 165 mm | 152 mm | 189 mm | 152 mm | 219 mm | +54 mm |
September temperatures in Sanford have risen by about 1.7°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 13.7°C (1981) to a record high of 35.8°C (1999).
Rainfall in September is a relatively wet time of year, averaging 172 mm, with a wettest year of 406 mm.
A good time to visit Sanford
September is a good time to visit Sanford, with days averaging 30°C and nights around 22.7°C (mean 26.4°C, warmer than Sanford's yearly average) and higher rainfall. April and October are marginally more temperate, but September still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 30.4°C | 26.7°C | 23.0°C | 33.6°C | 19.8°C | 167 mm | 84% | 1.7 m/s | 4.9 |
| 2024 | 31.1°C | 27.6°C | 24.0°C | 32.8°C | 21.9°C | 228 mm | 86% | 1.7 m/s | 4.6 |
| 2023 🔥 | 32.0°C | 27.7°C | 23.3°C | 35.4°C | 18.2°C | 190 mm | 77% | 1.5 m/s | 5.3 |
| 2022 | 30.4°C | 26.7°C | 23.1°C | 33.4°C | 15.2°C | 383 mm | 85% | 1.6 m/s | 4.6 |
| 2021 | 30.2°C | 26.5°C | 22.8°C | 32.5°C | 19.8°C | 131 mm | 84% | 1.3 m/s | 5 |
| 2020 | 30.0°C | 26.8°C | 23.6°C | 33.6°C | 16.0°C | 212 mm | 86% | 1.8 m/s | 4.7 |
| 2019 | 31.1°C | 27.0°C | 22.9°C | 34.0°C | 19.7°C | 90 mm | 78% | 2.4 m/s | 5.5 |
| 2018 | 30.7°C | 27.3°C | 23.8°C | 33.2°C | 22.5°C | 63 mm | 85% | 1.5 m/s | 5.2 |
| 2017 | 29.9°C | 26.5°C | 23.1°C | 32.3°C | 20.8°C | 347 mm | 86% | 1.9 m/s | 4.9 |
| 2016 | 30.6°C | 26.9°C | 23.2°C | 32.8°C | 20.3°C | 165 mm | 84% | 1.6 m/s | 4.9 |
| 2015 | 29.8°C | 26.4°C | 23.1°C | 32.9°C | 18.4°C | 164 mm | 87% | 1.3 m/s | 4.7 |
| 2014 | 29.8°C | 26.3°C | 22.8°C | 34.2°C | 20.3°C | 247 mm | 85% | 1.4 m/s | 4.5 |
| 2013 | 30.4°C | 26.4°C | 22.5°C | 33.4°C | 20.4°C | 121 mm | 82% | 1.6 m/s | 5.1 |
| 2012 | 29.8°C | 26.0°C | 22.2°C | 32.1°C | 17.8°C | 107 mm | 83% | 1.5 m/s | 5 |
| 2011 | 31.5°C | 27.1°C | 22.8°C | 34.6°C | 20.2°C | 120 mm | 78% | 1.4 m/s | 5.3 |
| 2010 | 31.8°C | 27.4°C | 23.0°C | 34.7°C | 19.9°C | 99 mm | 75% | 1.8 m/s | 5.3 |
| 2009 | 29.5°C | 26.1°C | 22.6°C | 31.2°C | 14.9°C | 119 mm | 86% | 1.5 m/s | 5 |
| 2008 | 29.3°C | 25.9°C | 22.4°C | 32.0°C | 17.0°C | 102 mm | 86% | 2 m/s | 5.2 |
| 2007 | 30.2°C | 26.7°C | 23.2°C | 33.8°C | 20.6°C | 230 mm | 83% | 1.8 m/s | 4.8 |
| 2006 | 30.9°C | 26.6°C | 22.2°C | 33.5°C | 17.5°C | 117 mm | 78% | 1.4 m/s | 5.3 |
| 2005 | 30.2°C | 26.5°C | 22.8°C | 32.4°C | 19.6°C | 143 mm | 83% | 2.1 m/s | 5 |
| 2004 🌧️ | 29.0°C | 26.3°C | 23.5°C | 31.0°C | 20.5°C | 406 mm | 88% | 3.3 m/s | 4.5 |
| 2003 | 29.1°C | 25.6°C | 22.0°C | 31.8°C | 18.5°C | 108 mm | 87% | 1.7 m/s | 4.8 |
| 2002 | 30.1°C | 26.8°C | 23.4°C | 32.1°C | 21.3°C | 134 mm | 88% | 1.7 m/s | 4.8 |
| 2001 ❄️ | 28.2°C | 25.0°C | 21.7°C | 31.4°C | 15.3°C | 320 mm | 87% | 1.7 m/s | 4.4 |
| 2000 | 30.0°C | 26.5°C | 23.0°C | 33.5°C | 20.7°C | 212 mm | 84% | 1.9 m/s | 4.7 |
| 1999 | 30.3°C | 26.2°C | 22.1°C | 35.8°C | 17.4°C | 216 mm | 81% | 2 m/s | 4.8 |
| 1998 | 29.5°C | 26.5°C | 23.4°C | 33.5°C | 20.1°C | 202 mm | 85% | 2.1 m/s | 4.1 |
| 1997 | 30.3°C | 26.3°C | 22.4°C | 33.1°C | 19.8°C | 113 mm | 80% | 1.8 m/s | 5.2 |
| 1996 | 30.8°C | 26.6°C | 22.4°C | 32.8°C | 18.4°C | 116 mm | 79% | 1.6 m/s | 5.1 |
| 1995 | 29.7°C | 26.3°C | 22.8°C | 31.3°C | 19.5°C | 153 mm | 86% | 1.4 m/s | 5.2 |
| 1994 | 28.4°C | 25.3°C | 22.1°C | 31.9°C | 19.5°C | 207 mm | 88% | 1.5 m/s | 4.5 |
| 1993 | 30.5°C | 26.8°C | 23.1°C | 33.4°C | 17.8°C | 122 mm | 80% | 1.5 m/s | 4.9 |
| 1992 | 28.9°C | 26.0°C | 23.0°C | 31.3°C | 19.7°C | 170 mm | 88% | 1.7 m/s | 4.7 |
| 1991 | 29.6°C | 26.1°C | 22.6°C | 31.9°C | 15.4°C | 147 mm | 85% | 1.9 m/s | 5.3 |
| 1990 | 31.8°C | 27.4°C | 22.9°C | 35.0°C | 18.8°C | 73 mm | 73% | 1.8 m/s | 5.1 |
| 1989 | 30.3°C | 26.7°C | 23.2°C | 32.9°C | 20.7°C | 164 mm | 83% | 1.7 m/s | 5.1 |
| 1988 | 29.6°C | 26.3°C | 23.1°C | 31.7°C | 20.9°C | 190 mm | 86% | 1.9 m/s | 4.7 |
| 1987 | 30.4°C | 26.5°C | 22.6°C | 34.2°C | 19.2°C | 180 mm | 79% | 1.3 m/s | 4.5 |
| 1986 | 30.2°C | 26.4°C | 22.6°C | 32.6°C | 20.8°C | 80 mm | 82% | 1.5 m/s | 5.2 |
| 1985 | 28.3°C | 25.2°C | 22.1°C | 31.1°C | 20.2°C | 189 mm | 86% | 2 m/s | 4.9 |
| 1984 | 28.7°C | 25.1°C | 21.6°C | 32.1°C | 16.9°C | 192 mm | 82% | 2.4 m/s | 4.9 |
| 1983 | 28.5°C | 25.3°C | 22.1°C | 31.6°C | 18.0°C | 134 mm | 84% | 1.6 m/s | — |
| 1982 | 28.7°C | 25.4°C | 22.1°C | 33.3°C | 18.0°C | 231 mm | 87% | 1.5 m/s | — |
| 1981 | 29.2°C | 25.3°C | 21.4°C | 31.9°C | 13.7°C | 126 mm | 82% | 1.5 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 22.7°C (mean 26.4°C), based on 45 years of NASA POWER data.
September averages 172 mm of rainfall in Sanford, a relatively wet time of year. The wettest on record was 406 mm in 2004.
The hottest September reached 35.8°C in 1999. The coldest dipped to 13.7°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.7°C. Daytime highs moved from 28.7°C to 30.8°C and overnight lows from 21.9°C to 23.2°C over the same span.
September is one of the warmer months of the year in Sanford and a relatively wet time of year, so plan for around 30°C daytime highs and 22.7°C at night.
Not quite — September is the 9th coolest month in Sanford, averaging 26.4°C.
For September in Sanford, pack light, breathable clothing and sun protection, with typical highs of 30°C and lows of 22.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 83% — quite humid.
Average wind speed in September is 1.7 m/s. The windiest September on record averaged 3.3 m/s (2004).
The wettest September on record was 2004 with 406 mm. On average, September sees 172 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 Sanford 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.
