August is one of the cooler months of the year in Westport, with average highs near 9°C and lows around 3.1°C (mean 6.1°C). It is about average for rainfall, averaging 160 mm of rainfall and 90% relative humidity across the period.
August is one of the cooler months of the year in Westport. Across 45 years of records, the warmest August in Westport was 2013 — when the month averaged 7.7°C — while the coldest were 1992 and 2004 at 4.2°C. Typical August days reach 9°C with nights near 3.1°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Westport, averaging 160 mm of rainfall. The wettest August on record was 1992 with 476 mm, while the driest was 2011 at 48 mm.
Relative humidity in Westport during August averages 90%. The most humid August was 1994 at 94%, and the least humid was 1986 at 85%.
August receives about 2.4 kWh/m²/day of solar energy in Westport. The sunniest August was 2025 at 2.8 kWh/m²/day, and the cloudiest was 2008 at 2.1.
Average wind speed in Westport during August is 0.4 m/s. The windiest Augusts were 1992, 2004 and 2009, among others at 0.5 m/s, while the calmest was 1987 at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.1°C | 5.5°C | 6.1°C | 6.4°C | 6.6°C | +0.5°C |
| Avg High | 9.3°C | 8.3°C | 9.0°C | 9.3°C | 9.5°C | +0.2°C |
| Avg Low | 3.0°C | 2.5°C | 3.2°C | 3.4°C | 3.7°C | +0.7°C |
| Avg Rain | 133 mm | 209 mm | 138 mm | 147 mm | 178 mm | +45 mm |
August temperatures in Westport have risen by about 0.5°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -4.3°C (2016) to a record high of 14.9°C (2005).
Rainfall in August is about average for rainfall, averaging 160 mm, with a wettest year of 476 mm.
A quieter season to visit Westport
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Westport. That said, August — with days averaging 9°C and nights around 3.1°C (mean 6.1°C) and higher rainfall (160 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 | 9.5°C | 5.9°C | 2.2°C | 11.8°C | -1.5°C | 95 mm | 88% | 0.4 m/s | 2.8 |
| 2024 | 9.4°C | 6.7°C | 4.1°C | 12.6°C | -1.5°C | 220 mm | 93% | 0.4 m/s | 2.2 |
| 2023 | 8.8°C | 5.7°C | 2.6°C | 11.8°C | -2.1°C | 127 mm | 90% | 0.4 m/s | 2.7 |
| 2022 | 10.2°C | 7.3°C | 4.4°C | 14.3°C | -2.1°C | 275 mm | 91% | 0.4 m/s | 2.2 |
| 2021 | 9.0°C | 6.3°C | 3.7°C | 12.2°C | -2.5°C | 211 mm | 92% | 0.4 m/s | 2.6 |
| 2020 | 10.0°C | 7.5°C | 4.9°C | 12.6°C | -1.6°C | 139 mm | 92% | 0.4 m/s | 2.5 |
| 2019 | 8.2°C | 5.8°C | 3.4°C | 12.9°C | -1.7°C | 201 mm | 93% | 0.4 m/s | 2.4 |
| 2018 | 10.0°C | 7.3°C | 4.5°C | 12.9°C | -1.4°C | 163 mm | 91% | 0.4 m/s | 2.6 |
| 2017 | 10.0°C | 7.1°C | 4.1°C | 13.4°C | -1.4°C | 179 mm | 91% | 0.4 m/s | 2.4 |
| 2016 | 8.3°C | 5.2°C | 2.1°C | 13.1°C | -4.3°C | 96 mm | 90% | 0.4 m/s | 2.5 |
| 2015 | 8.6°C | 5.6°C | 2.6°C | 12.8°C | -3.4°C | 193 mm | 92% | 0.4 m/s | 2.3 |
| 2014 | 9.5°C | 5.9°C | 2.2°C | 13.5°C | -2.2°C | 98 mm | 88% | 0.4 m/s | 2.5 |
| 2013 🔥 | 10.4°C | 7.7°C | 5.1°C | 13.6°C | -0.4°C | 150 mm | 91% | 0.4 m/s | 2.3 |
| 2012 | 9.8°C | 6.9°C | 4.1°C | 13.4°C | -0.2°C | 141 mm | 91% | 0.4 m/s | 2.4 |
| 2011 | 8.6°C | 5.6°C | 2.6°C | 12.6°C | -3.5°C | 48 mm | 90% | 0.4 m/s | 2.5 |
| 2010 | 9.9°C | 6.7°C | 3.5°C | 13.5°C | -2.8°C | 200 mm | 90% | 0.4 m/s | 2.4 |
| 2009 | 10.3°C | 7.5°C | 4.6°C | 13.8°C | 0.4°C | 226 mm | 91% | 0.5 m/s | 2.3 |
| 2008 | 7.9°C | 5.2°C | 2.6°C | 13.3°C | -2.7°C | 132 mm | 91% | 0.4 m/s | 2.1 |
| 2007 | 8.5°C | 6.1°C | 3.7°C | 11.9°C | -1.8°C | 128 mm | 92% | 0.4 m/s | 2.3 |
| 2006 | 8.0°C | 5.4°C | 2.7°C | 11.7°C | -2.1°C | 114 mm | 91% | 0.4 m/s | 2.4 |
| 2005 | 10.0°C | 7.4°C | 4.8°C | 14.9°C | 1.1°C | 120 mm | 92% | 0.4 m/s | 2.4 |
| 2004 | 7.5°C | 4.2°C | 0.9°C | 11.0°C | -3.7°C | 125 mm | 88% | 0.5 m/s | 2.6 |
| 2003 | 9.5°C | 6.1°C | 2.8°C | 12.0°C | -0.7°C | 127 mm | 88% | 0.4 m/s | 2.5 |
| 2002 | 9.4°C | 6.2°C | 3.1°C | 12.4°C | -0.8°C | 114 mm | 89% | 0.4 m/s | 2.5 |
| 2001 | 9.5°C | 6.5°C | 3.4°C | 12.6°C | -3.8°C | 169 mm | 90% | 0.4 m/s | 2.4 |
| 2000 | 9.5°C | 6.2°C | 3.0°C | 12.8°C | -2.0°C | 120 mm | 89% | 0.4 m/s | 2.2 |
| 1999 | 9.2°C | 6.0°C | 2.7°C | 13.9°C | -2.7°C | 148 mm | 90% | 0.4 m/s | 2.5 |
| 1998 | 8.8°C | 5.7°C | 2.6°C | 12.9°C | -2.2°C | 142 mm | 88% | 0.4 m/s | 2.3 |
| 1997 | 8.5°C | 5.4°C | 2.2°C | 12.2°C | -2.6°C | 123 mm | 88% | 0.4 m/s | 2.3 |
| 1996 | 7.9°C | 4.9°C | 1.8°C | 10.6°C | -2.7°C | 220 mm | 91% | 0.4 m/s | 2.3 |
| 1995 | 8.3°C | 5.3°C | 2.2°C | 11.3°C | -2.5°C | 247 mm | 90% | 0.4 m/s | 2.5 |
| 1994 | 7.9°C | 5.7°C | 3.5°C | 10.8°C | -0.9°C | 212 mm | 94% | 0.4 m/s | 2.5 |
| 1993 | 8.3°C | 5.0°C | 1.6°C | 10.8°C | -3.1°C | 88 mm | 88% | 0.4 m/s | 2.5 |
| 1992 ❄️ 🌧️ | 6.7°C | 4.2°C | 1.6°C | 10.7°C | -3.6°C | 476 mm | 93% | 0.5 m/s | 2.3 |
| 1991 | 8.8°C | 6.4°C | 4.0°C | 14.7°C | -1.6°C | 260 mm | 93% | 0.5 m/s | 2.2 |
| 1990 | 9.0°C | 6.1°C | 3.1°C | 12.4°C | -2.2°C | 174 mm | 89% | 0.4 m/s | 2.2 |
| 1989 | 10.3°C | 6.7°C | 3.1°C | 13.2°C | -2.3°C | 173 mm | 86% | 0.4 m/s | 2.5 |
| 1988 | 8.8°C | 6.2°C | 3.7°C | 12.4°C | -2.9°C | 158 mm | 90% | 0.4 m/s | 2.3 |
| 1987 | 10.0°C | 7.5°C | 5.0°C | 13.3°C | 2.4°C | 157 mm | 92% | 0.3 m/s | 2.4 |
| 1986 | 8.5°C | 5.0°C | 1.4°C | 12.3°C | -2.4°C | 77 mm | 85% | 0.4 m/s | 2.5 |
| 1985 | 9.0°C | 5.6°C | 2.3°C | 11.4°C | -2.4°C | 166 mm | 89% | 0.5 m/s | 2.7 |
| 1984 | 9.9°C | 6.7°C | 3.5°C | 13.6°C | -3.2°C | 153 mm | 88% | 0.4 m/s | 2.3 |
| 1983 | 9.7°C | 6.5°C | 3.3°C | 13.1°C | -2.3°C | 130 mm | 89% | 0.4 m/s | — |
| 1982 | 8.8°C | 6.2°C | 3.7°C | 11.1°C | -0.6°C | 111 mm | 91% | 0.4 m/s | — |
| 1981 | 8.4°C | 4.7°C | 1.1°C | 10.7°C | -2.7°C | 71 mm | 87% | 0.4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 9°C with lows near 3.1°C (mean 6.1°C), based on 45 years of NASA POWER data.
August averages 160 mm of rainfall in Westport, about average for rainfall. The wettest on record was 476 mm in 1992.
The hottest August reached 14.9°C in 2005. The coldest dipped to -4.3°C in 2016.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.5°C. Daytime highs moved from 9.2°C to 9.4°C and overnight lows from 2.8°C to 3.4°C over the same span.
August is one of the cooler months of the year in Westport and about average for rainfall, so plan for around 9°C daytime highs and 3.1°C at night.
Not quite — August is the 2nd coolest month in Westport, averaging 6.1°C.
For August in Westport, pack warm layers and a jacket for chilly mornings, with typical highs of 9°C and lows of 3.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 90% — quite humid.
Average wind speed in August is 0.4 m/s. The windiest August on record averaged 0.5 m/s (1985).
The wettest August on record was 1992 with 476 mm. On average, August sees 160 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 Westport 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.
