September is one of the warmer months of the year in Oswestry, with average highs near 16.8°C and lows around 9.2°C (mean 13°C). It is about average for rainfall, averaging 76 mm of rainfall and 86% relative humidity across the period.
September is one of the warmer months of the year in Oswestry. Across 45 years of records, the warmest September in Oswestry was 2023 — when the month averaged 15.5°C — while the coldest was 1986 at 10.7°C. Typical September days reach 16.8°C with nights near 9.2°C. The long-term trend is warming, about 0.3°C per decade.
September is about average for rainfall in Oswestry, averaging 76 mm of rainfall. The wettest September on record was 2025 with 135 mm, while the driest was 1986 at 11 mm.
Relative humidity in Oswestry during September averages 86%. The most humid September was 1998 at 89%, and the least humid was 1991 at 80%.
September receives about 3 kWh/m²/day of solar energy in Oswestry. The sunniest Septembers were 1991, 2015 and 2020 at 3.4 kWh/m²/day, and the cloudiest were 2000, 2001 and 2024, among others at 2.5.
Average wind speed in Oswestry during September is 2.6 m/s. The windiest Septembers were 1983 and 2004 at 3.3 m/s, while the calmest was 2014 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.6°C | 12.6°C | 13.3°C | 12.9°C | 13.8°C | +1.2°C |
| Avg High | 16.3°C | 16.5°C | 17.1°C | 16.8°C | 17.7°C | +1.4°C |
| Avg Low | 8.9°C | 8.8°C | 9.5°C | 9.1°C | 9.9°C | +1°C |
| Avg Rain | 67 mm | 75 mm | 75 mm | 77 mm | 93 mm | +27 mm |
September temperatures in Oswestry have risen by about 1°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 2.8°C (1993) to a record high of 25.8°C (2023).
Rainfall in September is about average for rainfall, averaging 76 mm, with a wettest year of 135 mm.
One of the best times to visit Oswestry
September is one of the best times to visit Oswestry. Expect days averaging 16.8°C and nights around 9.2°C (mean 13°C) — warmer than Oswestry's yearly average — with moderate rainfall (76 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 | 13.0°C | 9.1°C | 21.0°C | 4.7°C | 135 mm | 85% | 2.8 m/s | 3 |
| 2024 | 16.5°C | 12.9°C | 9.2°C | 23.5°C | 4.7°C | 133 mm | 89% | 2.6 m/s | 2.5 |
| 2023 🔥 | 19.5°C | 15.5°C | 11.4°C | 25.8°C | 7.0°C | 90 mm | 86% | 2.4 m/s | 3 |
| 2022 | 17.4°C | 13.7°C | 10.0°C | 21.1°C | 6.9°C | 86 mm | 85% | 2.5 m/s | 3 |
| 2021 | 19.0°C | 15.0°C | 10.9°C | 25.2°C | 7.3°C | 66 mm | 87% | 2 m/s | 3 |
| 2020 | 17.1°C | 12.9°C | 8.7°C | 23.2°C | 3.5°C | 49 mm | 86% | 2.5 m/s | 3.4 |
| 2019 | 17.0°C | 13.3°C | 9.5°C | 21.0°C | 5.9°C | 122 mm | 86% | 2.7 m/s | 3.2 |
| 2018 | 16.5°C | 12.7°C | 8.9°C | 21.5°C | 3.1°C | 82 mm | 85% | 2.8 m/s | 2.9 |
| 2017 | 16.0°C | 12.5°C | 9.0°C | 20.6°C | 6.3°C | 109 mm | 88% | 2.7 m/s | 2.7 |
| 2016 | 18.3°C | 14.6°C | 10.8°C | 24.5°C | 7.3°C | 64 mm | 87% | 2.7 m/s | 3 |
| 2015 | 15.8°C | 11.7°C | 7.6°C | 19.0°C | 5.3°C | 49 mm | 86% | 2.2 m/s | 3.4 |
| 2014 | 18.3°C | 13.8°C | 9.3°C | 20.5°C | 7.0°C | 16 mm | 86% | 1.7 m/s | 3.2 |
| 2013 | 16.6°C | 12.7°C | 8.9°C | 21.7°C | 6.1°C | 48 mm | 87% | 2.5 m/s | 2.8 |
| 2012 | 15.3°C | 11.6°C | 7.9°C | 20.5°C | 4.0°C | 115 mm | 88% | 2.9 m/s | 3.1 |
| 2011 | 17.3°C | 13.7°C | 10.2°C | 23.0°C | 7.0°C | 68 mm | 86% | 3.2 m/s | 3 |
| 2010 | 16.4°C | 12.8°C | 9.2°C | 20.5°C | 3.2°C | 94 mm | 87% | 2.8 m/s | 2.9 |
| 2009 | 16.8°C | 12.9°C | 9.0°C | 21.7°C | 6.3°C | 38 mm | 87% | 2.5 m/s | 3.1 |
| 2008 | 16.1°C | 12.5°C | 8.9°C | 19.1°C | 5.7°C | 111 mm | 89% | 2.4 m/s | 2.8 |
| 2007 | 16.3°C | 12.9°C | 9.4°C | 19.9°C | 4.0°C | 63 mm | 88% | 2.7 m/s | 3.1 |
| 2006 | 19.3°C | 15.2°C | 11.0°C | 23.7°C | 6.7°C | 63 mm | 87% | 2.7 m/s | 3.2 |
| 2005 | 17.9°C | 14.0°C | 10.0°C | 24.0°C | 5.6°C | 83 mm | 86% | 2.5 m/s | 3.1 |
| 2004 | 17.1°C | 13.5°C | 9.9°C | 23.1°C | 7.1°C | 77 mm | 86% | 3.3 m/s | 3.2 |
| 2003 | 17.4°C | 13.2°C | 9.0°C | 21.6°C | 5.5°C | 66 mm | 86% | 1.9 m/s | 3.1 |
| 2002 | 17.1°C | 13.1°C | 9.2°C | 20.6°C | 6.2°C | 39 mm | 86% | 1.9 m/s | 3.1 |
| 2001 | 15.6°C | 12.4°C | 9.1°C | 19.1°C | 6.2°C | 72 mm | 88% | 3 m/s | 2.5 |
| 2000 | 17.0°C | 13.5°C | 9.9°C | 23.7°C | 4.9°C | 132 mm | 89% | 2.5 m/s | 2.5 |
| 1999 | 18.1°C | 14.2°C | 10.2°C | 23.5°C | 7.0°C | 118 mm | 87% | 2.5 m/s | 3.2 |
| 1998 | 17.0°C | 13.4°C | 9.8°C | 22.2°C | 6.0°C | 93 mm | 89% | 2.8 m/s | 3 |
| 1997 | 16.8°C | 12.9°C | 9.1°C | 19.8°C | 6.1°C | 36 mm | 86% | 2.8 m/s | 3 |
| 1996 | 16.8°C | 12.6°C | 8.5°C | 20.5°C | 5.4°C | 24 mm | 84% | 2.6 m/s | 3.1 |
| 1995 | 16.0°C | 12.5°C | 8.9°C | 19.1°C | 5.6°C | 87 mm | 85% | 2.5 m/s | 2.9 |
| 1994 | 14.6°C | 11.3°C | 8.0°C | 18.3°C | 4.5°C | 117 mm | 88% | 2.8 m/s | 2.9 |
| 1993 | 15.3°C | 11.5°C | 7.6°C | 21.3°C | 2.8°C | 80 mm | 86% | 2.7 m/s | 2.5 |
| 1992 | 15.7°C | 12.1°C | 8.5°C | 20.9°C | 5.9°C | 83 mm | 86% | 3 m/s | 3 |
| 1991 | 18.4°C | 13.8°C | 9.1°C | 24.6°C | 5.4°C | 44 mm | 80% | 2.5 m/s | 3.4 |
| 1990 | 15.8°C | 12.1°C | 8.5°C | 21.5°C | 4.2°C | 62 mm | 81% | 2.8 m/s | 2.9 |
| 1989 | 17.3°C | 13.4°C | 9.6°C | 21.5°C | 7.4°C | 37 mm | 84% | 2.5 m/s | 2.9 |
| 1988 | 15.5°C | 12.1°C | 8.8°C | 23.6°C | 4.4°C | 56 mm | 86% | 3.1 m/s | 2.6 |
| 1987 | 15.9°C | 12.2°C | 8.5°C | 19.9°C | 5.7°C | 71 mm | 86% | 2.6 m/s | 2.9 |
| 1986 ❄️ | 15.0°C | 10.7°C | 6.4°C | 19.2°C | 3.4°C | 11 mm | 84% | 2.1 m/s | 3.3 |
| 1985 | 17.3°C | 13.5°C | 9.7°C | 21.5°C | 6.5°C | 41 mm | 87% | 2.7 m/s | 3 |
| 1984 | 15.7°C | 12.6°C | 9.4°C | 23.0°C | 5.1°C | 112 mm | 84% | 3 m/s | 2.8 |
| 1983 | 16.0°C | 12.5°C | 9.1°C | 20.9°C | 5.7°C | 86 mm | 86% | 3.3 m/s | — |
| 1982 | 17.2°C | 13.0°C | 8.9°C | 23.5°C | 4.7°C | 83 mm | 87% | 2.5 m/s | — |
| 1981 | 16.8°C | 13.2°C | 9.5°C | 21.0°C | 6.2°C | 101 mm | 86% | 2.7 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 16.8°C with lows near 9.2°C (mean 13°C), based on 45 years of NASA POWER data.
September averages 76 mm of rainfall in Oswestry, about average for rainfall. The wettest on record was 135 mm in 2025.
The hottest September reached 25.8°C in 2023. The coldest dipped to 2.8°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1°C. Daytime highs moved from 16.6°C to 17.9°C and overnight lows from 9.3°C to 10.1°C over the same span.
September is one of the warmer months of the year in Oswestry and about average for rainfall, so plan for around 16.8°C daytime highs and 9.2°C at night.
Not quite — September is the 9th coolest month in Oswestry, averaging 13°C.
For September in Oswestry, pack light layers you can adjust through the day, with typical highs of 16.8°C and lows of 9.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 86% — quite humid.
Average wind speed in September is 2.6 m/s. The windiest September on record averaged 3.3 m/s (1983).
The wettest September on record was 2025 with 135 mm. On average, September sees 76 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 Oswestry 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.
