September is one of the warmer months of the year in Leamington, with average highs near 21°C and lows around 15.4°C (mean 18.2°C). It is about average for rainfall, averaging 73 mm of rainfall and 76% relative humidity across the period.
September is one of the warmer months of the year in Leamington. Across 45 years of records, the warmest September in Leamington was 2016 — when the month averaged 21.4°C — while the coldest was 1984 at 14.2°C. Typical September days reach 21°C with nights near 15.4°C. The long-term trend is warming, about 1.3°C per decade.
September is about average for rainfall in Leamington, averaging 73 mm of rainfall. The wettest September on record was 1981 with 161 mm, while the driest was 1995 at 23 mm.
Relative humidity in Leamington during September averages 76%. The most humid September was 1986 at 84%, and the least humid was 2025 at 69%.
September receives about 4.2 kWh/m²/day of solar energy in Leamington. The sunniest Septembers were 1999, 2004 and 2025 at 4.8 kWh/m²/day, and the cloudiest was 1993 at 3.2.
Average wind speed in Leamington during September is 3.7 m/s. The windiest September was 2000 at 4.7 m/s, while the calmest was 2025 at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.9°C | 17.1°C | 18.6°C | 19.7°C | 20.2°C | +4.3°C |
| Avg High | 18.9°C | 20.0°C | 21.3°C | 22.3°C | 22.9°C | +4°C |
| Avg Low | 12.9°C | 14.1°C | 15.9°C | 17.1°C | 17.4°C | +4.5°C |
| Avg Rain | 92 mm | 68 mm | 77 mm | 75 mm | 45 mm | -47 mm |
September temperatures in Leamington have risen by about 4.9°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 5°C (1991) to a record high of 29.8°C (2011).
Rainfall in September is about average for rainfall, averaging 73 mm, with a wettest year of 161 mm.
One of the best times to visit Leamington
September is one of the best times to visit Leamington. Expect days averaging 21°C and nights around 15.4°C (mean 18.2°C) — warmer than Leamington's yearly average — with moderate rainfall (73 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 | 23.7°C | 20.7°C | 17.6°C | 27.1°C | 12.9°C | 27 mm | 69% | 2.7 m/s | 4.8 |
| 2024 | 23.6°C | 20.9°C | 18.1°C | 27.0°C | 11.7°C | 49 mm | 75% | 3.7 m/s | 4.4 |
| 2023 | 22.4°C | 20.0°C | 17.6°C | 28.8°C | 14.5°C | 37 mm | 74% | 3.1 m/s | 4 |
| 2022 | 22.6°C | 20.0°C | 17.4°C | 28.2°C | 11.6°C | 34 mm | 72% | 3.9 m/s | 4.1 |
| 2021 | 23.4°C | 20.5°C | 17.6°C | 27.9°C | 12.3°C | 77 mm | 72% | 4.5 m/s | 4.4 |
| 2020 | 21.9°C | 19.0°C | 16.2°C | 27.1°C | 10.9°C | 45 mm | 75% | 4.4 m/s | 4.3 |
| 2019 | 23.3°C | 20.8°C | 18.2°C | 26.9°C | 16.0°C | 59 mm | 78% | 3.7 m/s | 4 |
| 2018 | 23.4°C | 20.9°C | 18.5°C | 29.6°C | 11.0°C | 94 mm | 81% | 3.8 m/s | 3.8 |
| 2017 | 22.3°C | 19.7°C | 17.0°C | 28.3°C | 12.4°C | 31 mm | 77% | 3.3 m/s | 4.5 |
| 2016 🔥 | 23.8°C | 21.4°C | 19.1°C | 29.0°C | 15.6°C | 72 mm | 74% | 3.8 m/s | 4.4 |
| 2015 | 23.4°C | 20.9°C | 18.3°C | 28.1°C | 13.1°C | 73 mm | 76% | 3.7 m/s | 4.5 |
| 2014 | 21.3°C | 18.6°C | 15.9°C | 28.0°C | 10.0°C | 101 mm | 75% | 3.5 m/s | 4.3 |
| 2013 | 21.5°C | 18.8°C | 16.1°C | 29.2°C | 11.1°C | 43 mm | 75% | 3.9 m/s | 4.4 |
| 2012 | 21.4°C | 18.7°C | 16.0°C | 26.7°C | 9.0°C | 85 mm | 72% | 3.8 m/s | 4.4 |
| 2011 | 20.8°C | 18.4°C | 16.1°C | 29.8°C | 8.0°C | 124 mm | 81% | 4.1 m/s | 3.6 |
| 2010 | 21.6°C | 18.7°C | 15.8°C | 29.4°C | 11.7°C | 69 mm | 72% | 4.6 m/s | 4 |
| 2009 | 21.5°C | 19.3°C | 17.0°C | 24.9°C | 10.2°C | 46 mm | 75% | 3.8 m/s | 4.5 |
| 2008 | 22.1°C | 19.5°C | 16.9°C | 27.7°C | 14.0°C | 120 mm | 76% | 3.7 m/s | 4.3 |
| 2007 | 22.6°C | 19.9°C | 17.1°C | 27.7°C | 10.3°C | 56 mm | 73% | 3.6 m/s | 4.6 |
| 2006 | 20.2°C | 17.7°C | 15.2°C | 25.0°C | 9.1°C | 71 mm | 78% | 4.3 m/s | 3.5 |
| 2005 | 23.7°C | 20.8°C | 18.0°C | 27.2°C | 12.0°C | 83 mm | 72% | 3.9 m/s | 4.5 |
| 2004 | 22.7°C | 20.0°C | 17.4°C | 26.4°C | 12.5°C | 29 mm | 74% | 3.8 m/s | 4.8 |
| 2003 | 19.0°C | 16.3°C | 13.5°C | 23.3°C | 7.6°C | 120 mm | 79% | 3.8 m/s | 4.5 |
| 2002 | 22.2°C | 18.8°C | 15.4°C | 26.9°C | 11.1°C | 67 mm | 73% | 3.3 m/s | 4.7 |
| 2001 | 18.6°C | 15.7°C | 12.7°C | 23.3°C | 6.4°C | 75 mm | 76% | 3.8 m/s | 4.3 |
| 2000 | 20.8°C | 18.1°C | 15.3°C | 26.8°C | 9.8°C | 103 mm | 76% | 4.7 m/s | 4 |
| 1999 | 21.8°C | 18.5°C | 15.3°C | 26.1°C | 9.9°C | 63 mm | 69% | 3.8 m/s | 4.8 |
| 1998 | 23.5°C | 20.7°C | 17.8°C | 27.9°C | 12.7°C | 32 mm | 70% | 3.8 m/s | 4.6 |
| 1997 | 20.9°C | 18.1°C | 15.3°C | 24.5°C | 10.6°C | 57 mm | 76% | 4.1 m/s | 4.1 |
| 1996 | 19.6°C | 16.8°C | 14.0°C | 25.6°C | 8.9°C | 110 mm | 80% | 4 m/s | 3.8 |
| 1995 | 19.0°C | 15.9°C | 12.8°C | 25.7°C | 6.0°C | 23 mm | 72% | 3.5 m/s | 4.4 |
| 1994 | 19.8°C | 16.4°C | 13.0°C | 26.3°C | 9.2°C | 34 mm | 74% | 3.4 m/s | 4.4 |
| 1993 | 17.6°C | 15.1°C | 12.6°C | 23.9°C | 5.4°C | 108 mm | 78% | 3.9 m/s | 3.2 |
| 1992 | 18.8°C | 15.9°C | 13.0°C | 22.8°C | 6.3°C | 118 mm | 80% | 4.1 m/s | 4.2 |
| 1991 | 19.7°C | 16.7°C | 13.6°C | 26.6°C | 5.0°C | 32 mm | 71% | 3.5 m/s | 4.2 |
| 1990 | 19.6°C | 16.5°C | 13.4°C | 26.5°C | 6.6°C | 106 mm | 79% | 3.8 m/s | 4.1 |
| 1989 | 19.1°C | 16.4°C | 13.6°C | 25.1°C | 5.4°C | 98 mm | 80% | 3.6 m/s | 4.1 |
| 1988 | 20.0°C | 16.8°C | 13.7°C | 23.7°C | 9.8°C | 54 mm | 76% | 4 m/s | 4.1 |
| 1987 | 19.5°C | 16.9°C | 14.3°C | 23.4°C | 7.9°C | 72 mm | 81% | 3.2 m/s | 4.1 |
| 1986 | 18.8°C | 15.6°C | 12.4°C | 22.7°C | 7.7°C | 157 mm | 84% | 3.4 m/s | 3.9 |
| 1985 | 18.9°C | 15.9°C | 12.8°C | 23.7°C | 7.6°C | 58 mm | 79% | 3.4 m/s | 4.1 |
| 1984 ❄️ | 17.3°C | 14.2°C | 11.2°C | 23.6°C | 6.6°C | 74 mm | 78% | 3.4 m/s | 3.9 |
| 1983 | 19.4°C | 15.9°C | 12.5°C | 25.5°C | 6.4°C | 69 mm | 76% | 3.5 m/s | — |
| 1982 | 18.6°C | 15.3°C | 12.1°C | 24.1°C | 5.9°C | 89 mm | 80% | 2.9 m/s | — |
| 1981 🌧️ | 18.8°C | 16.3°C | 13.8°C | 24.0°C | 8.6°C | 161 mm | 80% | 4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 21°C with lows near 15.4°C (mean 18.2°C), based on 45 years of NASA POWER data.
September averages 73 mm of rainfall in Leamington, about average for rainfall. The wettest on record was 161 mm in 1981.
The hottest September reached 29.8°C in 2011. The coldest dipped to 5°C in 1991.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 4.9°C. Daytime highs moved from 18.6°C to 23.1°C and overnight lows from 12.5°C to 17.7°C over the same span.
September is one of the warmer months of the year in Leamington and about average for rainfall, so plan for around 21°C daytime highs and 15.4°C at night.
Not quite — September is the 9th coolest month in Leamington, averaging 18.2°C.
For September in Leamington, pack light layers you can adjust through the day, with typical highs of 21°C and lows of 15.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 76% — quite humid.
Average wind speed in September is 3.7 m/s. The windiest September on record averaged 4.7 m/s (2000).
The wettest September on record was 1981 with 161 mm. On average, September sees 73 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 Leamington 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.
