September is one of the cooler months of the year in Stratford, with average highs near 13.6°C and lows around 7.7°C (mean 10.7°C). It is about average for rainfall, averaging 103 mm of rainfall and 86% relative humidity across the period.
September is one of the cooler months of the year in Stratford. Across 45 years of records, the warmest September in Stratford was 2005 — when the month averaged 11.9°C — while the coldest was 1992 at 8.6°C. Typical September days reach 13.6°C with nights near 7.7°C. The long-term September temperature trend is broadly flat.
September is about average for rainfall in Stratford, averaging 103 mm of rainfall. The wettest September on record was 2010 with 226 mm, while the driest was 2001 at 20 mm.
Relative humidity in Stratford during September averages 86%. The most humid September was 1995 at 89%, and the least humid was 1985 at 82%.
September receives about 3.7 kWh/m²/day of solar energy in Stratford. The sunniest September was 1985 at 4.2 kWh/m²/day, and the cloudiest was 2016 at 3.2.
Average wind speed in Stratford during September is 4.4 m/s. The windiest September was 2010 at 5.5 m/s, while the calmest was 1989 at 3.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.8°C | 10.1°C | 10.8°C | 10.7°C | 10.8°C | 0°C |
| Avg High | 13.9°C | 12.9°C | 14.0°C | 13.4°C | 13.7°C | -0.2°C |
| Avg Low | 7.8°C | 7.2°C | 7.7°C | 7.9°C | 8.0°C | +0.2°C |
| Avg Rain | 88 mm | 116 mm | 85 mm | 111 mm | 119 mm | +31 mm |
September temperatures in Stratford have stayed relatively stable across the record.
September has ranged from a record low of 0.8°C (2009) to a record high of 19.7°C (1988).
Rainfall in September is about average for rainfall, averaging 103 mm, with a wettest year of 226 mm.
A quieter season to visit Stratford
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Stratford. That said, September — with days averaging 13.6°C and nights around 7.7°C (mean 10.7°C) and higher rainfall (103 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 13.8°C | 11.0°C | 8.2°C | 16.8°C | 2.9°C | 107 mm | 85% | 5.2 m/s | 3.6 |
| 2024 | 13.7°C | 11.0°C | 8.3°C | 17.2°C | 4.4°C | 108 mm | 86% | 4.6 m/s | 3.7 |
| 2023 | 14.6°C | 11.4°C | 8.3°C | 17.6°C | 4.1°C | 132 mm | 87% | 4.7 m/s | 3.8 |
| 2022 | 13.8°C | 10.9°C | 8.0°C | 17.4°C | 2.9°C | 113 mm | 87% | 3.8 m/s | 3.5 |
| 2021 | 12.9°C | 10.0°C | 7.2°C | 15.6°C | 3.6°C | 138 mm | 86% | 4.7 m/s | 3.8 |
| 2020 | 13.2°C | 10.5°C | 7.8°C | 16.4°C | 1.5°C | 116 mm | 85% | 5.1 m/s | 3.8 |
| 2019 | 13.5°C | 10.5°C | 7.6°C | 17.6°C | 4.1°C | 131 mm | 87% | 4.3 m/s | 3.7 |
| 2018 | 13.3°C | 10.6°C | 7.8°C | 17.8°C | 4.5°C | 45 mm | 86% | 4.4 m/s | 4 |
| 2017 | 13.4°C | 11.0°C | 8.6°C | 16.4°C | 5.6°C | 130 mm | 87% | 4.6 m/s | 3.5 |
| 2016 | 14.1°C | 11.4°C | 8.7°C | 17.5°C | 5.3°C | 110 mm | 87% | 4.3 m/s | 3.2 |
| 2015 | 12.3°C | 9.6°C | 6.9°C | 15.6°C | 3.8°C | 82 mm | 86% | 4.5 m/s | 3.8 |
| 2014 | 14.0°C | 11.0°C | 8.0°C | 16.8°C | 4.1°C | 116 mm | 86% | 4.3 m/s | 3.9 |
| 2013 | 13.7°C | 10.9°C | 8.2°C | 16.8°C | 2.2°C | 116 mm | 85% | 5.1 m/s | 3.7 |
| 2012 | 13.6°C | 10.6°C | 7.6°C | 17.6°C | 2.9°C | 87 mm | 83% | 4.9 m/s | 3.7 |
| 2011 | 13.0°C | 10.0°C | 7.0°C | 16.8°C | 3.8°C | 72 mm | 85% | 3.9 m/s | 4 |
| 2010 🌧️ | 13.4°C | 11.0°C | 8.6°C | 16.4°C | 4.9°C | 226 mm | 86% | 5.5 m/s | 3.3 |
| 2009 | 14.0°C | 10.3°C | 6.7°C | 15.9°C | 0.8°C | 101 mm | 86% | 3.6 m/s | 3.9 |
| 2008 | 13.8°C | 10.8°C | 7.8°C | 16.6°C | 2.9°C | 76 mm | 87% | 4.1 m/s | 3.8 |
| 2007 | 13.9°C | 10.7°C | 7.4°C | 19.7°C | 2.0°C | 48 mm | 85% | 3.7 m/s | 3.7 |
| 2006 | 14.0°C | 11.3°C | 8.5°C | 16.9°C | 3.4°C | 36 mm | 87% | 4.1 m/s | 3.6 |
| 2005 🔥 | 15.3°C | 11.9°C | 8.5°C | 19.4°C | 4.2°C | 87 mm | 85% | 3.6 m/s | 3.9 |
| 2004 | 12.6°C | 9.5°C | 6.5°C | 14.4°C | 2.1°C | 102 mm | 85% | 4.8 m/s | 3.6 |
| 2003 | 14.0°C | 11.2°C | 8.4°C | 17.7°C | 4.6°C | 178 mm | 86% | 5.2 m/s | 3.4 |
| 2002 | 13.8°C | 11.1°C | 8.4°C | 15.9°C | 3.1°C | 115 mm | 84% | 5.2 m/s | 3.4 |
| 2001 | 14.6°C | 11.1°C | 7.6°C | 16.6°C | 3.9°C | 20 mm | 83% | 3.6 m/s | 3.9 |
| 2000 | 13.6°C | 10.5°C | 7.4°C | 16.7°C | 3.1°C | 86 mm | 85% | 4.2 m/s | 3.6 |
| 1999 | 14.4°C | 11.0°C | 7.5°C | 17.1°C | 2.5°C | 68 mm | 85% | 3.8 m/s | 3.9 |
| 1998 | 14.3°C | 11.1°C | 7.9°C | 17.3°C | 3.8°C | 77 mm | 85% | 4.3 m/s | 3.8 |
| 1997 | 12.9°C | 9.7°C | 6.4°C | 15.8°C | 1.3°C | 75 mm | 85% | 4.1 m/s | 3.7 |
| 1996 | 14.3°C | 11.1°C | 7.9°C | 19.7°C | 2.6°C | 122 mm | 88% | 3.9 m/s | 3.6 |
| 1995 | 13.1°C | 10.4°C | 7.8°C | 16.9°C | 2.4°C | 154 mm | 89% | 4 m/s | 3.5 |
| 1994 | 11.8°C | 9.4°C | 7.0°C | 14.0°C | 4.2°C | 171 mm | 88% | 4.5 m/s | 3.7 |
| 1993 | 11.8°C | 9.1°C | 6.4°C | 16.6°C | 3.0°C | 124 mm | 85% | 4.3 m/s | 3.7 |
| 1992 ❄️ | 11.0°C | 8.6°C | 6.2°C | 14.6°C | 2.3°C | 174 mm | 89% | 3.9 m/s | 3.9 |
| 1991 | 13.0°C | 10.5°C | 8.0°C | 16.3°C | 3.3°C | 115 mm | 88% | 4.2 m/s | 3.7 |
| 1990 | 12.4°C | 9.6°C | 6.8°C | 14.9°C | 3.4°C | 75 mm | 86% | 3.8 m/s | 4.1 |
| 1989 | 15.3°C | 11.4°C | 7.5°C | 19.6°C | 2.0°C | 39 mm | 85% | 3.3 m/s | 4 |
| 1988 | 14.2°C | 11.5°C | 8.8°C | 19.7°C | 3.6°C | 111 mm | 88% | 4.7 m/s | 3.3 |
| 1987 | 13.5°C | 10.8°C | 8.2°C | 16.7°C | 4.5°C | 94 mm | 84% | 4.8 m/s | 3.7 |
| 1986 | 13.1°C | 10.4°C | 7.6°C | 16.4°C | 2.2°C | 104 mm | 87% | 4.5 m/s | 3.8 |
| 1985 | 14.7°C | 10.9°C | 7.2°C | 18.0°C | 3.0°C | 62 mm | 82% | 4.2 m/s | 4.2 |
| 1984 | 13.8°C | 10.5°C | 7.1°C | 17.0°C | 4.3°C | 63 mm | 84% | 4.1 m/s | 3.9 |
| 1983 | 14.0°C | 11.3°C | 8.5°C | 16.6°C | 4.1°C | 134 mm | 86% | 4.9 m/s | — |
| 1982 | 13.5°C | 10.2°C | 6.9°C | 16.5°C | 2.2°C | 88 mm | 85% | 4 m/s | — |
| 1981 | 13.3°C | 10.6°C | 8.0°C | 15.6°C | 3.4°C | 98 mm | 85% | 5.3 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 13.6°C with lows near 7.7°C (mean 10.7°C), based on 45 years of NASA POWER data.
September averages 103 mm of rainfall in Stratford, about average for rainfall. The wettest on record was 226 mm in 2010.
The hottest September reached 19.7°C in 1988. The coldest dipped to 0.8°C in 2009.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 7.5°C to 8°C while daytime highs eased from 13.9°C to 13.8°C, narrowing the gap between day and night.
September is one of the cooler months of the year in Stratford and about average for rainfall, so plan for around 13.6°C daytime highs and 7.7°C at night.
Not quite — September is the 4th coolest month in Stratford, averaging 10.7°C.
For September in Stratford, pack warm layers and a jacket for chilly mornings, with typical highs of 13.6°C and lows of 7.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 86% — quite humid.
Average wind speed in September is 4.4 m/s. The windiest September on record averaged 5.5 m/s (2010).
The wettest September on record was 2010 with 226 mm. On average, September sees 103 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 Stratford 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.
