August is one of the cooler months of the year in Seymour, with average highs near 13.3°C and lows around 3.4°C (mean 8.4°C). It is a relatively wet time of year, averaging 63 mm of rainfall and 84% relative humidity across the period.
August is one of the cooler months of the year in Seymour. Across 45 years of records, the warmest August in Seymour was 2024 — when the month averaged 11.3°C — while the coldest was 1992 at 6.6°C. Typical August days reach 13.3°C with nights near 3.4°C. The long-term trend is warming, about 0.3°C per decade.
August is a relatively wet time of year in Seymour, averaging 63 mm of rainfall. The wettest Augusts on record were 1981 and 1985 with 134 mm, while the driest was 2014 at 13 mm.
Relative humidity in Seymour during August averages 84%. The most humid August was 1989 at 90%, and the least humid was 1982 at 74%.
August receives about 2.7 kWh/m²/day of solar energy in Seymour. The sunniest Augusts were 2006 and 2014 at 3.1 kWh/m²/day, and the cloudiest were 2001, 2010 and 2022, among others at 2.4.
Average wind speed in Seymour during August is 2.2 m/s. The windiest August was 1991 at 2.9 m/s, while the calmest were 2000, 2006 and 2011, among others at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.1°C | 7.8°C | 8.5°C | 8.4°C | 9.4°C | +1.3°C |
| Avg High | 12.9°C | 12.6°C | 13.7°C | 13.2°C | 14.6°C | +1.7°C |
| Avg Low | 3.4°C | 3.0°C | 3.3°C | 3.5°C | 4.2°C | +0.8°C |
| Avg Rain | 83 mm | 70 mm | 58 mm | 57 mm | 40 mm | -43 mm |
August temperatures in Seymour have risen by about 1.4°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -2.2°C (2003) to a record high of 23.2°C (1982).
Rainfall in August is a relatively wet time of year, averaging 63 mm, with a wettest year of 134 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
A quieter season to visit Seymour
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Seymour. That said, August — with days averaging 13.3°C and nights around 3.4°C (mean 8.4°C) and moderate rainfall (63 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 | 14.6°C | 9.0°C | 3.4°C | 19.4°C | -0.7°C | 39 mm | 80% | 2.1 m/s | 3 |
| 2024 🔥 | 16.6°C | 11.3°C | 6.0°C | 21.4°C | 0.2°C | 27 mm | 78% | 2.2 m/s | 2.8 |
| 2023 | 15.4°C | 9.9°C | 4.3°C | 19.2°C | 0.8°C | 25 mm | 82% | 1.9 m/s | 2.7 |
| 2022 | 13.6°C | 9.0°C | 4.5°C | 17.6°C | 0.7°C | 77 mm | 85% | 2.3 m/s | 2.4 |
| 2021 | 14.4°C | 9.2°C | 3.9°C | 19.9°C | 0.2°C | 22 mm | 82% | 2.2 m/s | 2.8 |
| 2020 | 12.8°C | 7.9°C | 3.1°C | 17.2°C | -0.3°C | 49 mm | 85% | 2.3 m/s | 2.8 |
| 2019 | 13.6°C | 8.1°C | 2.5°C | 17.5°C | 0.0°C | 35 mm | 80% | 2.4 m/s | 2.8 |
| 2018 | 13.4°C | 8.2°C | 3.0°C | 17.7°C | -2.0°C | 30 mm | 75% | 2.7 m/s | 2.8 |
| 2017 | 13.1°C | 8.2°C | 3.3°C | 17.7°C | -1.1°C | 52 mm | 81% | 2.4 m/s | 2.7 |
| 2016 | 13.4°C | 8.7°C | 3.9°C | 18.2°C | 0.4°C | 76 mm | 84% | 2.2 m/s | 2.8 |
| 2015 | 12.9°C | 8.0°C | 3.1°C | 17.6°C | -1.2°C | 33 mm | 82% | 2.2 m/s | 2.5 |
| 2014 | 13.8°C | 8.7°C | 3.5°C | 18.7°C | -1.2°C | 13 mm | 84% | 1.9 m/s | 3.1 |
| 2013 | 13.0°C | 8.8°C | 4.6°C | 19.0°C | 0.6°C | 91 mm | 87% | 2.6 m/s | 2.5 |
| 2012 | 12.3°C | 7.9°C | 3.4°C | 16.7°C | 0.0°C | 68 mm | 86% | 2.6 m/s | 2.6 |
| 2011 | 14.7°C | 9.7°C | 4.6°C | 20.7°C | 0.6°C | 61 mm | 83% | 1.8 m/s | 2.9 |
| 2010 | 11.5°C | 7.4°C | 3.3°C | 15.0°C | -0.2°C | 117 mm | 88% | 2.5 m/s | 2.4 |
| 2009 | 14.4°C | 9.3°C | 4.2°C | 17.9°C | -1.0°C | 54 mm | 81% | 2.6 m/s | 2.6 |
| 2008 | 12.1°C | 7.3°C | 2.5°C | 16.1°C | -0.9°C | 66 mm | 85% | 2.2 m/s | 2.5 |
| 2007 | 14.4°C | 9.1°C | 3.8°C | 21.4°C | 0.3°C | 24 mm | 83% | 2.2 m/s | 2.9 |
| 2006 | 15.2°C | 9.2°C | 3.2°C | 20.2°C | 1.0°C | 22 mm | 77% | 1.8 m/s | 3.1 |
| 2005 | 13.7°C | 8.4°C | 3.1°C | 18.7°C | -1.2°C | 88 mm | 84% | 2.5 m/s | 2.7 |
| 2004 | 13.5°C | 8.5°C | 3.6°C | 19.0°C | 0.3°C | 66 mm | 83% | 2.1 m/s | 2.8 |
| 2003 | 11.9°C | 7.1°C | 2.4°C | 15.2°C | -2.2°C | 94 mm | 85% | 2.5 m/s | 2.6 |
| 2002 | 14.4°C | 8.9°C | 3.4°C | 17.4°C | 0.0°C | 30 mm | 78% | 2.1 m/s | 2.9 |
| 2001 | 13.8°C | 8.5°C | 3.3°C | 19.1°C | 1.5°C | 73 mm | 79% | 2.6 m/s | 2.4 |
| 2000 | 13.1°C | 8.3°C | 3.6°C | 16.7°C | -0.4°C | 59 mm | 84% | 1.8 m/s | 2.6 |
| 1999 | 14.0°C | 9.2°C | 4.4°C | 19.8°C | 0.1°C | 100 mm | 87% | 2.3 m/s | 2.6 |
| 1998 | 14.2°C | 9.2°C | 4.2°C | 18.2°C | 1.0°C | 34 mm | 84% | 1.9 m/s | 2.9 |
| 1997 | 12.6°C | 7.4°C | 2.2°C | 16.4°C | -1.2°C | 71 mm | 82% | 2.2 m/s | 2.6 |
| 1996 | 11.8°C | 7.7°C | 3.6°C | 15.7°C | 0.9°C | 76 mm | 89% | 2.3 m/s | 2.4 |
| 1995 | 13.1°C | 8.0°C | 2.9°C | 19.5°C | -0.1°C | 34 mm | 88% | 2 m/s | 3 |
| 1994 | 12.7°C | 7.1°C | 1.5°C | 19.3°C | -1.4°C | 21 mm | 81% | 1.9 m/s | 2.9 |
| 1993 | 14.1°C | 8.8°C | 3.4°C | 18.3°C | -1.3°C | 87 mm | 84% | 2.1 m/s | 2.8 |
| 1992 ❄️ | 11.2°C | 6.6°C | 2.0°C | 15.8°C | -1.2°C | 99 mm | 87% | 2.4 m/s | 2.6 |
| 1991 | 11.6°C | 7.2°C | 2.9°C | 15.7°C | -0.2°C | 86 mm | 88% | 2.9 m/s | 2.4 |
| 1990 | 11.1°C | 7.0°C | 3.0°C | 15.7°C | -1.0°C | 88 mm | 90% | 2.6 m/s | 2.6 |
| 1989 | 11.0°C | 6.7°C | 2.3°C | 14.2°C | -0.9°C | 97 mm | 90% | 2 m/s | 2.5 |
| 1988 | 13.1°C | 8.5°C | 3.9°C | 17.9°C | 0.8°C | 48 mm | 87% | 2.2 m/s | 2.6 |
| 1987 | 12.9°C | 8.4°C | 3.8°C | 15.8°C | 0.5°C | 47 mm | 88% | 2.1 m/s | 2.7 |
| 1986 | 12.8°C | 7.8°C | 2.8°C | 16.8°C | -0.5°C | 69 mm | 86% | 2 m/s | 3 |
| 1985 | 11.8°C | 7.3°C | 2.8°C | 15.9°C | -1.9°C | 134 mm | 86% | 2.2 m/s | 2.5 |
| 1984 | 12.4°C | 8.3°C | 4.2°C | 16.8°C | 2.4°C | 117 mm | 88% | 2.7 m/s | 2.4 |
| 1983 | 13.1°C | 8.5°C | 4.0°C | 17.0°C | 0.1°C | 79 mm | 88% | 2.2 m/s | — |
| 1982 | 17.0°C | 10.2°C | 3.4°C | 23.2°C | 0.4°C | 17 mm | 74% | 1.8 m/s | — |
| 1981 🌧️ | 11.6°C | 7.3°C | 3.1°C | 14.9°C | -0.8°C | 134 mm | 89% | 2.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 13.3°C with lows near 3.4°C (mean 8.4°C), based on 45 years of NASA POWER data.
August averages 63 mm of rainfall in Seymour, a relatively wet time of year. The wettest on record was 134 mm in 1981.
The hottest August reached 23.2°C in 1982. The coldest dipped to -2.2°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.4°C. Daytime highs moved from 13.2°C to 14.9°C and overnight lows from 3.5°C to 4.4°C over the same span.
August is one of the cooler months of the year in Seymour and a relatively wet time of year, so plan for around 13.3°C daytime highs and 3.4°C at night.
Not quite — August is the 3rd coolest month in Seymour, averaging 8.4°C.
For August in Seymour, pack warm layers and a jacket for chilly mornings, with typical highs of 13.3°C and lows of 3.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 84% — quite humid.
Average wind speed in August is 2.2 m/s. The windiest August on record averaged 2.9 m/s (1991).
The wettest August on record was 1981 with 134 mm. On average, August sees 63 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 Seymour behaves each August, 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 August specifically, along with year-by-year records and how the month has changed over the decades.
