September is one of the warmer months of the year in Bideford, with average highs near 17°C and lows around 12.5°C (mean 14.8°C). It is about average for rainfall, averaging 85 mm of rainfall and 85% relative humidity across the period.
September is one of the warmer months of the year in Bideford. Across 45 years of records, the warmest September in Bideford was 2023 — when the month averaged 17.1°C — while the coldest was 1986 at 12.3°C. Typical September days reach 17°C with nights near 12.5°C. The long-term trend is warming, about 0.2°C per decade.
September is about average for rainfall in Bideford, averaging 85 mm of rainfall. The wettest September on record was 2024 with 160 mm, while the driest was 2014 at 14 mm.
Relative humidity in Bideford during September averages 85%. The most humid September was 1998 at 88%, and the least humid was 1990 at 80%.
September receives about 3.3 kWh/m²/day of solar energy in Bideford. The sunniest September was 2014 at 3.9 kWh/m²/day, and the cloudiest was 2000 at 2.7.
Average wind speed in Bideford during September is 4.5 m/s. The windiest September was 1983 at 5.6 m/s, while the calmest was 2014 at 3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.4°C | 14.4°C | 14.9°C | 14.7°C | 15.5°C | +1.1°C |
| Avg High | 16.6°C | 16.7°C | 17.2°C | 16.9°C | 17.8°C | +1.2°C |
| Avg Low | 12.1°C | 12.2°C | 12.7°C | 12.5°C | 13.2°C | +1.1°C |
| Avg Rain | 84 mm | 90 mm | 63 mm | 91 mm | 110 mm | +26 mm |
September temperatures in Bideford have risen by about 0.9°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 7.2°C (1986) to a record high of 24.5°C (2023).
Rainfall in September is about average for rainfall, averaging 85 mm, with a wettest year of 160 mm.
One of the best times to visit Bideford
September is one of the best times to visit Bideford. Expect days averaging 17°C and nights around 12.5°C (mean 14.8°C) — warmer than Bideford's yearly average — with higher rainfall (85 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 | 16.9°C | 14.8°C | 12.6°C | 19.7°C | 8.5°C | 130 mm | 84% | 5.1 m/s | 3.4 |
| 2024 🌧️ | 16.8°C | 14.7°C | 12.5°C | 22.1°C | 9.4°C | 160 mm | 87% | 4.3 m/s | 2.8 |
| 2023 🔥 | 19.5°C | 17.1°C | 14.6°C | 24.5°C | 11.3°C | 95 mm | 87% | 4.2 m/s | 3.2 |
| 2022 | 17.5°C | 15.4°C | 13.3°C | 21.6°C | 9.8°C | 103 mm | 84% | 4.5 m/s | 3.1 |
| 2021 | 18.6°C | 16.1°C | 13.6°C | 23.4°C | 11.4°C | 98 mm | 87% | 3.5 m/s | 3.1 |
| 2020 | 17.2°C | 14.8°C | 12.4°C | 21.5°C | 9.2°C | 72 mm | 85% | 4.3 m/s | 3.4 |
| 2019 | 17.3°C | 15.2°C | 13.1°C | 20.2°C | 10.2°C | 156 mm | 86% | 5.2 m/s | 3.4 |
| 2018 | 16.9°C | 14.6°C | 12.3°C | 21.1°C | 8.4°C | 85 mm | 83% | 4.6 m/s | 3.3 |
| 2017 | 16.2°C | 14.3°C | 12.5°C | 18.6°C | 10.5°C | 146 mm | 86% | 5.2 m/s | 3.2 |
| 2016 | 17.6°C | 15.6°C | 13.7°C | 21.5°C | 10.8°C | 101 mm | 88% | 4.7 m/s | 3.1 |
| 2015 | 15.8°C | 13.5°C | 11.2°C | 18.9°C | 9.0°C | 80 mm | 85% | 4.3 m/s | 3.7 |
| 2014 | 18.5°C | 15.8°C | 13.0°C | 21.1°C | 10.5°C | 14 mm | 85% | 3 m/s | 3.9 |
| 2013 | 17.2°C | 14.9°C | 12.6°C | 20.6°C | 10.7°C | 62 mm | 85% | 4.1 m/s | 3 |
| 2012 | 15.7°C | 13.8°C | 11.8°C | 19.5°C | 8.2°C | 87 mm | 85% | 4.7 m/s | 3.3 |
| 2011 | 17.1°C | 15.2°C | 13.2°C | 21.1°C | 11.2°C | 77 mm | 86% | 5.5 m/s | 3.1 |
| 2010 | 16.7°C | 14.4°C | 12.1°C | 19.5°C | 7.5°C | 96 mm | 86% | 4.5 m/s | 3.2 |
| 2009 | 16.8°C | 14.4°C | 12.1°C | 20.2°C | 10.2°C | 41 mm | 86% | 4.3 m/s | 3.4 |
| 2008 | 16.3°C | 14.2°C | 12.1°C | 18.0°C | 10.1°C | 98 mm | 85% | 4.3 m/s | 3.3 |
| 2007 | 16.9°C | 14.6°C | 12.3°C | 20.3°C | 7.6°C | 44 mm | 86% | 4.3 m/s | 3.6 |
| 2006 | 18.8°C | 16.5°C | 14.1°C | 21.3°C | 11.5°C | 50 mm | 87% | 4.8 m/s | 3.4 |
| 2005 | 17.8°C | 15.4°C | 13.0°C | 21.6°C | 9.3°C | 75 mm | 85% | 4.2 m/s | 3.4 |
| 2004 | 17.3°C | 15.2°C | 13.2°C | 22.6°C | 10.9°C | 63 mm | 85% | 5.4 m/s | 3.3 |
| 2003 | 17.5°C | 14.9°C | 12.3°C | 21.0°C | 8.7°C | 38 mm | 83% | 3.6 m/s | 3.5 |
| 2002 | 17.3°C | 14.7°C | 12.0°C | 20.4°C | 9.8°C | 32 mm | 85% | 3.5 m/s | 3.6 |
| 2001 | 16.1°C | 14.2°C | 12.3°C | 18.7°C | 10.0°C | 51 mm | 85% | 4.7 m/s | 3.3 |
| 2000 | 17.3°C | 15.3°C | 13.2°C | 22.1°C | 10.2°C | 139 mm | 88% | 4.5 m/s | 2.7 |
| 1999 | 17.8°C | 15.5°C | 13.2°C | 22.4°C | 10.2°C | 123 mm | 86% | 4.4 m/s | 3.3 |
| 1998 | 17.1°C | 15.1°C | 13.2°C | 20.3°C | 10.7°C | 107 mm | 88% | 5 m/s | 3.2 |
| 1997 | 17.7°C | 15.0°C | 12.3°C | 20.5°C | 10.8°C | 31 mm | 86% | 4.2 m/s | 3.2 |
| 1996 | 16.9°C | 14.2°C | 11.6°C | 19.6°C | 9.4°C | 40 mm | 83% | 4.4 m/s | 3.7 |
| 1995 | 16.3°C | 14.3°C | 12.3°C | 19.4°C | 10.0°C | 100 mm | 84% | 4.5 m/s | 3.5 |
| 1994 | 15.4°C | 13.5°C | 11.6°C | 18.3°C | 9.6°C | 137 mm | 86% | 4.7 m/s | 3 |
| 1993 | 15.5°C | 13.3°C | 11.1°C | 19.9°C | 9.0°C | 126 mm | 85% | 4.3 m/s | 3.3 |
| 1992 | 15.7°C | 13.7°C | 11.8°C | 18.8°C | 10.2°C | 92 mm | 86% | 4.9 m/s | 3.1 |
| 1991 | 18.2°C | 15.5°C | 12.9°C | 22.1°C | 10.3°C | 86 mm | 83% | 4.1 m/s | 3.6 |
| 1990 | 16.8°C | 14.3°C | 11.7°C | 21.2°C | 8.9°C | 58 mm | 80% | 4.2 m/s | 3.5 |
| 1989 | 17.6°C | 15.3°C | 12.9°C | 21.2°C | 10.7°C | 79 mm | 84% | 4.2 m/s | 3 |
| 1988 | 15.9°C | 13.8°C | 11.7°C | 21.6°C | 8.8°C | 74 mm | 86% | 5 m/s | 3.2 |
| 1987 | 16.8°C | 14.6°C | 12.4°C | 20.3°C | 8.1°C | 74 mm | 85% | 4.2 m/s | 3.4 |
| 1986 ❄️ | 14.9°C | 12.3°C | 9.8°C | 17.4°C | 7.2°C | 26 mm | 84% | 3.5 m/s | 3.4 |
| 1985 | 17.1°C | 14.8°C | 12.4°C | 20.6°C | 9.4°C | 56 mm | 87% | 4.3 m/s | 3.2 |
| 1984 | 16.2°C | 14.2°C | 12.2°C | 21.7°C | 9.9°C | 112 mm | 81% | 5 m/s | 3.3 |
| 1983 | 16.5°C | 14.4°C | 12.3°C | 20.4°C | 9.8°C | 102 mm | 85% | 5.6 m/s | — |
| 1982 | 17.4°C | 15.0°C | 12.6°C | 23.3°C | 9.1°C | 88 mm | 87% | 4 m/s | — |
| 1981 | 17.2°C | 15.0°C | 12.8°C | 20.8°C | 10.7°C | 142 mm | 84% | 4.6 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 17°C with lows near 12.5°C (mean 14.8°C), based on 45 years of NASA POWER data.
September averages 85 mm of rainfall in Bideford, about average for rainfall. The wettest on record was 160 mm in 2024.
The hottest September reached 24.5°C in 2023. The coldest dipped to 7.2°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.9°C. Daytime highs moved from 16.9°C to 17.9°C and overnight lows from 12.5°C to 13.3°C over the same span.
September is one of the warmer months of the year in Bideford and about average for rainfall, so plan for around 17°C daytime highs and 12.5°C at night.
Not quite — September is the 10th coolest month in Bideford, averaging 14.8°C.
For September in Bideford, pack light layers you can adjust through the day, with typical highs of 17°C and lows of 12.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 85% — quite humid.
Average wind speed in September is 4.5 m/s. The windiest September on record averaged 5.6 m/s (1983).
The wettest September on record was 2024 with 160 mm. On average, September sees 85 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 Bideford 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.
