September is one of the warmer months of the year in Palm Bay, with average highs near 29.4°C and lows around 24.7°C (mean 27.1°C). It is a relatively wet time of year, averaging 181 mm of rainfall and 82% relative humidity across the period.
September is one of the warmer months of the year in Palm Bay. Across 45 years of records, the warmest September in Palm Bay was 2024 — when the month averaged 28.6°C — while the coldest were 1984 and 2001 at 26.1°C. Typical September days reach 29.4°C with nights near 24.7°C. The long-term trend is warming, about 0.2°C per decade.
September is a relatively wet time of year in Palm Bay, averaging 181 mm of rainfall. The wettest September on record was 2004 with 420 mm, while the driest was 1988 at 69 mm.
Relative humidity in Palm Bay during September averages 82%. The most humid September was 1998 at 86%, and the least humid was 2010 at 76%.
September receives about 5 kWh/m²/day of solar energy in Palm Bay. The sunniest Septembers were 1986, 1989 and 2019 at 5.4 kWh/m²/day, and the cloudiest were 1994 and 2001 at 4.4.
Average wind speed in Palm Bay during September is 2.6 m/s. The windiest September was 2004 at 4.9 m/s, while the calmest were 1987 and 2015 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.7°C | 26.9°C | 26.9°C | 27.3°C | 27.7°C | +1°C |
| Avg High | 29.1°C | 29.1°C | 29.2°C | 29.7°C | 30.1°C | +1°C |
| Avg Low | 24.3°C | 24.6°C | 24.7°C | 24.9°C | 25.2°C | +0.9°C |
| Avg Rain | 156 mm | 191 mm | 194 mm | 164 mm | 209 mm | +54 mm |
September temperatures in Palm Bay have risen by about 1.4°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 17.6°C (2022) to a record high of 33.8°C (2010).
Rainfall in September is a relatively wet time of year, averaging 181 mm, with a wettest year of 420 mm.
A quieter season to visit Palm Bay
If your dates are flexible, the more temperate months of November and April tend to be the most comfortable for visiting Palm Bay. That said, September — with days averaging 29.4°C and nights around 24.7°C (mean 27.1°C) and higher rainfall (181 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 | 29.7°C | 27.5°C | 25.3°C | 31.1°C | 24.2°C | 173 mm | 84% | 2.5 m/s | 4.8 |
| 2024 🔥 | 31.1°C | 28.6°C | 26.0°C | 32.4°C | 24.5°C | 151 mm | 83% | 2.5 m/s | 4.8 |
| 2023 | 30.5°C | 27.9°C | 25.3°C | 32.4°C | 22.6°C | 217 mm | 79% | 2.1 m/s | 5.3 |
| 2022 | 30.1°C | 27.5°C | 24.8°C | 33.1°C | 17.6°C | 340 mm | 83% | 2.4 m/s | 5 |
| 2021 | 29.5°C | 27.0°C | 24.6°C | 30.7°C | 22.8°C | 127 mm | 83% | 2.1 m/s | 5.2 |
| 2020 | 29.6°C | 27.4°C | 25.2°C | 31.9°C | 20.9°C | 249 mm | 85% | 2.8 m/s | 5 |
| 2019 | 29.5°C | 27.2°C | 24.8°C | 31.6°C | 22.5°C | 73 mm | 81% | 4.2 m/s | 5.4 |
| 2018 | 29.8°C | 27.6°C | 25.4°C | 31.6°C | 24.1°C | 116 mm | 84% | 2.4 m/s | 5.3 |
| 2017 | 29.8°C | 27.5°C | 25.2°C | 31.3°C | 22.9°C | 279 mm | 83% | 2.9 m/s | 5 |
| 2016 | 29.9°C | 27.4°C | 25.0°C | 31.8°C | 23.0°C | 196 mm | 84% | 2.1 m/s | 5.1 |
| 2015 | 29.6°C | 27.3°C | 25.0°C | 31.7°C | 23.3°C | 167 mm | 84% | 1.9 m/s | 4.7 |
| 2014 | 29.5°C | 27.1°C | 24.7°C | 31.8°C | 22.9°C | 271 mm | 82% | 2.1 m/s | 4.7 |
| 2013 | 29.5°C | 27.1°C | 24.6°C | 31.2°C | 23.3°C | 142 mm | 80% | 2.5 m/s | 4.8 |
| 2012 | 29.1°C | 26.7°C | 24.2°C | 30.9°C | 23.4°C | 142 mm | 82% | 2.4 m/s | 5 |
| 2011 | 29.8°C | 27.3°C | 24.8°C | 31.3°C | 23.3°C | 121 mm | 81% | 2.2 m/s | 5.2 |
| 2010 | 30.8°C | 28.0°C | 25.2°C | 33.8°C | 21.4°C | 134 mm | 76% | 3 m/s | 5.3 |
| 2009 | 29.4°C | 27.1°C | 24.8°C | 30.4°C | 19.9°C | 164 mm | 83% | 2.3 m/s | 5.2 |
| 2008 | 28.8°C | 26.7°C | 24.6°C | 31.0°C | 20.6°C | 96 mm | 84% | 3 m/s | 5.1 |
| 2007 | 29.5°C | 27.3°C | 25.2°C | 31.0°C | 23.7°C | 188 mm | 82% | 2.7 m/s | 5.1 |
| 2006 | 29.6°C | 26.8°C | 24.0°C | 31.2°C | 19.9°C | 128 mm | 80% | 2.3 m/s | 5.3 |
| 2005 | 29.4°C | 27.1°C | 24.7°C | 31.1°C | 22.6°C | 153 mm | 82% | 3.2 m/s | 4.8 |
| 2004 🌧️ | 28.8°C | 26.9°C | 25.1°C | 30.3°C | 22.9°C | 420 mm | 86% | 4.9 m/s | 4.6 |
| 2003 | 28.8°C | 26.6°C | 24.4°C | 30.2°C | 22.5°C | 169 mm | 86% | 2.6 m/s | 4.8 |
| 2002 | 29.7°C | 27.4°C | 25.2°C | 31.0°C | 23.6°C | 116 mm | 85% | 2.5 m/s | 5.1 |
| 2001 | 28.3°C | 26.1°C | 23.9°C | 30.8°C | 19.9°C | 316 mm | 85% | 2.7 m/s | 4.4 |
| 2000 | 29.7°C | 27.3°C | 24.8°C | 31.7°C | 23.3°C | 186 mm | 82% | 2.8 m/s | 5.1 |
| 1999 | 29.3°C | 26.7°C | 24.1°C | 32.3°C | 21.5°C | 262 mm | 83% | 3.1 m/s | 4.8 |
| 1998 | 29.1°C | 27.0°C | 24.9°C | 32.4°C | 22.9°C | 251 mm | 86% | 2.9 m/s | 4.7 |
| 1997 | 29.0°C | 26.6°C | 24.2°C | 30.5°C | 21.5°C | 183 mm | 83% | 2.8 m/s | 5.1 |
| 1996 | 29.6°C | 27.0°C | 24.4°C | 31.1°C | 22.2°C | 106 mm | 80% | 2.5 m/s | 5.3 |
| 1995 | 29.3°C | 27.1°C | 24.8°C | 30.8°C | 22.4°C | 185 mm | 84% | 2.1 m/s | 5.1 |
| 1994 | 28.2°C | 26.2°C | 24.2°C | 30.6°C | 22.5°C | 244 mm | 86% | 2.4 m/s | 4.4 |
| 1993 | 29.5°C | 27.2°C | 24.9°C | 31.7°C | 22.6°C | 153 mm | 81% | 2.4 m/s | 5 |
| 1992 | 28.7°C | 26.7°C | 24.7°C | 30.4°C | 23.1°C | 173 mm | 85% | 2.5 m/s | 4.9 |
| 1991 | 29.0°C | 26.9°C | 24.8°C | 30.6°C | 19.5°C | 181 mm | 83% | 2.6 m/s | 5 |
| 1990 | 29.4°C | 27.1°C | 24.8°C | 31.1°C | 22.1°C | 176 mm | 81% | 2.7 m/s | 5.2 |
| 1989 | 29.8°C | 27.4°C | 25.0°C | 31.3°C | 23.3°C | 151 mm | 81% | 2.6 m/s | 5.4 |
| 1988 | 29.6°C | 27.1°C | 24.6°C | 31.2°C | 22.7°C | 69 mm | 82% | 2.9 m/s | 4.9 |
| 1987 | 29.9°C | 27.3°C | 24.7°C | 32.7°C | 22.9°C | 186 mm | 79% | 1.9 m/s | 4.8 |
| 1986 | 29.5°C | 27.0°C | 24.5°C | 30.8°C | 23.3°C | 127 mm | 80% | 2.2 m/s | 5.4 |
| 1985 | 28.2°C | 26.2°C | 24.1°C | 30.6°C | 22.3°C | 279 mm | 83% | 3.2 m/s | 4.9 |
| 1984 ❄️ | 28.6°C | 26.1°C | 23.6°C | 31.2°C | 20.7°C | 175 mm | 79% | 3.7 m/s | 4.8 |
| 1983 | 28.7°C | 26.5°C | 24.3°C | 31.3°C | 18.2°C | 117 mm | 81% | 2.7 m/s | — |
| 1982 | 28.7°C | 26.5°C | 24.4°C | 31.6°C | 20.9°C | 162 mm | 82% | 2.4 m/s | — |
| 1981 | 28.7°C | 26.3°C | 23.9°C | 30.4°C | 19.7°C | 138 mm | 80% | 2.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 29.4°C with lows near 24.7°C (mean 27.1°C), based on 45 years of NASA POWER data.
September averages 181 mm of rainfall in Palm Bay, a relatively wet time of year. The wettest on record was 420 mm in 2004.
The hottest September reached 33.8°C in 2010. The coldest dipped to 17.6°C in 2022.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.4°C. Daytime highs moved from 28.6°C to 30.2°C and overnight lows from 24.1°C to 25.2°C over the same span.
September is one of the warmer months of the year in Palm Bay and a relatively wet time of year, so plan for around 29.4°C daytime highs and 24.7°C at night.
Not quite — September is the 9th coolest month in Palm Bay, averaging 27.1°C.
For September in Palm Bay, pack light layers you can adjust through the day, with typical highs of 29.4°C and lows of 24.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 82% — quite humid.
Average wind speed in September is 2.6 m/s. The windiest September on record averaged 4.9 m/s (2004).
The wettest September on record was 2004 with 420 mm. On average, September sees 181 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 Palm Bay 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.
