July is one of the cooler months of the year in Westport, with average highs near 8.1°C and lows around 2.5°C (mean 5.3°C). It is about average for rainfall, averaging 155 mm of rainfall and 91% relative humidity across the period.
July is one of the cooler months of the year in Westport. Across 45 years of records, the warmest July in Westport was 1998 — when the month averaged 6.9°C — while the coldest was 1995 at 3°C. Typical July days reach 8.1°C with nights near 2.5°C. The long-term trend is warming, about 0.3°C per decade.
July is about average for rainfall in Westport, averaging 155 mm of rainfall. The wettest July on record was 1995 with 302 mm, while the driest was 2001 at 29 mm.
Relative humidity in Westport during July averages 91%. The most humid July was 2018 at 96%, and the least humid was 2001 at 86%.
July receives about 1.6 kWh/m²/day of solar energy in Westport. The sunniest Julys were 2000 and 2001 at 1.9 kWh/m²/day, and the cloudiest was 1984 at 1.3.
Average wind speed in Westport during July is 0.4 m/s. The windiest Julys were 2016, 2023 and 2025, among others at 0.5 m/s, while the calmest were 2021, 2022 and 2024, among others at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.1°C | 4.9°C | 5.2°C | 5.6°C | 6.1°C | +1°C |
| Avg High | 7.9°C | 7.7°C | 8.0°C | 8.3°C | 8.7°C | +0.8°C |
| Avg Low | 2.3°C | 2.1°C | 2.3°C | 2.9°C | 3.5°C | +1.2°C |
| Avg Rain | 160 mm | 174 mm | 111 mm | 161 mm | 181 mm | +21 mm |
July temperatures in Westport have risen by about 0.8°C between 1981–1985 and 2021–2025.
July has ranged from a record low of -3.4°C (2007) to a record high of 13.5°C (1998).
Rainfall in July is about average for rainfall, averaging 155 mm, with a wettest year of 302 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, July — with days averaging 8.1°C and nights around 2.5°C (mean 5.3°C) and higher rainfall (155 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 | 9.3°C | 6.7°C | 4.0°C | 12.4°C | -0.6°C | 229 mm | 92% | 0.5 m/s | 1.7 |
| 2024 | 9.0°C | 6.1°C | 3.2°C | 11.2°C | -2.0°C | 141 mm | 92% | 0.4 m/s | 1.7 |
| 2023 | 8.5°C | 6.0°C | 3.6°C | 11.4°C | -0.8°C | 155 mm | 93% | 0.5 m/s | 1.7 |
| 2022 | 8.2°C | 5.9°C | 3.7°C | 11.5°C | -0.9°C | 274 mm | 94% | 0.4 m/s | 1.5 |
| 2021 | 8.8°C | 6.0°C | 3.3°C | 13.3°C | -1.5°C | 158 mm | 93% | 0.4 m/s | 1.5 |
| 2020 | 8.5°C | 5.8°C | 3.1°C | 11.4°C | -2.1°C | 128 mm | 93% | 0.4 m/s | 1.6 |
| 2019 | 9.2°C | 6.8°C | 4.4°C | 12.8°C | -0.7°C | 246 mm | 95% | 0.4 m/s | 1.6 |
| 2018 | 8.4°C | 6.3°C | 4.2°C | 12.1°C | 0.3°C | 202 mm | 96% | 0.4 m/s | 1.5 |
| 2017 | 7.7°C | 4.9°C | 2.0°C | 11.4°C | -3.4°C | 180 mm | 92% | 0.4 m/s | 1.7 |
| 2016 | 8.3°C | 5.7°C | 3.2°C | 12.3°C | -1.3°C | 196 mm | 91% | 0.5 m/s | 1.6 |
| 2015 | 7.5°C | 4.6°C | 1.6°C | 12.1°C | -3.2°C | 163 mm | 93% | 0.5 m/s | 1.7 |
| 2014 | 8.2°C | 5.1°C | 2.1°C | 11.7°C | -2.2°C | 115 mm | 90% | 0.5 m/s | 1.7 |
| 2013 | 8.7°C | 6.5°C | 4.3°C | 11.9°C | -2.4°C | 148 mm | 93% | 0.4 m/s | 1.7 |
| 2012 | 9.2°C | 6.2°C | 3.3°C | 12.5°C | -2.1°C | 135 mm | 90% | 0.4 m/s | 1.7 |
| 2011 | 7.4°C | 4.7°C | 2.0°C | 11.1°C | -2.6°C | 135 mm | 91% | 0.5 m/s | 1.5 |
| 2010 | 8.1°C | 5.0°C | 1.8°C | 11.2°C | -2.8°C | 94 mm | 91% | 0.4 m/s | 1.8 |
| 2009 | 7.2°C | 4.6°C | 2.0°C | 10.8°C | -2.9°C | 195 mm | 93% | 0.4 m/s | 1.6 |
| 2008 | 8.0°C | 5.3°C | 2.5°C | 11.1°C | -3.2°C | 196 mm | 91% | 0.5 m/s | 1.6 |
| 2007 | 7.9°C | 5.1°C | 2.3°C | 11.3°C | -3.4°C | 92 mm | 90% | 0.4 m/s | 1.7 |
| 2006 | 7.8°C | 5.3°C | 2.9°C | 11.5°C | -2.0°C | 109 mm | 91% | 0.4 m/s | 1.6 |
| 2005 | 8.6°C | 6.2°C | 3.9°C | 12.9°C | -0.5°C | 154 mm | 95% | 0.4 m/s | 1.4 |
| 2004 | 7.7°C | 4.4°C | 1.1°C | 10.3°C | -3.2°C | 117 mm | 90% | 0.4 m/s | 1.8 |
| 2003 | 7.4°C | 4.5°C | 1.5°C | 12.2°C | -2.4°C | 83 mm | 90% | 0.5 m/s | 1.8 |
| 2002 | 8.2°C | 5.3°C | 2.4°C | 10.9°C | -1.8°C | 59 mm | 89% | 0.4 m/s | 1.7 |
| 2001 | 7.6°C | 4.2°C | 0.7°C | 10.6°C | -2.7°C | 29 mm | 86% | 0.5 m/s | 1.9 |
| 2000 | 9.8°C | 6.7°C | 3.5°C | 12.2°C | -1.1°C | 78 mm | 90% | 0.4 m/s | 1.9 |
| 1999 | 8.4°C | 5.3°C | 2.3°C | 11.6°C | -2.7°C | 125 mm | 92% | 0.4 m/s | 1.6 |
| 1998 🔥 | 9.9°C | 6.9°C | 4.0°C | 13.5°C | -0.6°C | 190 mm | 91% | 0.4 m/s | 1.7 |
| 1997 | 7.5°C | 4.7°C | 1.8°C | 10.4°C | -3.1°C | 55 mm | 91% | 0.4 m/s | 1.6 |
| 1996 | 7.3°C | 4.2°C | 1.1°C | 10.3°C | -3.1°C | 130 mm | 90% | 0.4 m/s | 1.7 |
| 1995 ❄️ 🌧️ | 5.1°C | 3.0°C | 0.8°C | 8.3°C | -2.4°C | 302 mm | 94% | 0.4 m/s | 1.6 |
| 1994 | 7.1°C | 4.5°C | 1.9°C | 10.9°C | -2.8°C | 194 mm | 92% | 0.5 m/s | 1.6 |
| 1993 | 8.7°C | 5.6°C | 2.5°C | 12.0°C | -2.4°C | 99 mm | 91% | 0.5 m/s | 1.6 |
| 1992 | 7.2°C | 4.9°C | 2.5°C | 10.6°C | -2.2°C | 255 mm | 93% | 0.4 m/s | 1.6 |
| 1991 | 7.2°C | 4.3°C | 1.5°C | 9.8°C | -1.9°C | 168 mm | 91% | 0.4 m/s | 1.6 |
| 1990 | 8.4°C | 5.5°C | 2.7°C | 11.0°C | -2.2°C | 225 mm | 92% | 0.4 m/s | 1.6 |
| 1989 | 7.8°C | 4.6°C | 1.5°C | 10.6°C | -2.6°C | 117 mm | 86% | 0.5 m/s | 1.8 |
| 1988 | 8.3°C | 5.8°C | 3.3°C | 11.9°C | -2.1°C | 266 mm | 92% | 0.5 m/s | 1.6 |
| 1987 | 7.9°C | 4.9°C | 1.9°C | 11.3°C | -1.8°C | 101 mm | 91% | 0.4 m/s | 1.6 |
| 1986 | 6.9°C | 4.1°C | 1.3°C | 10.4°C | -2.2°C | 150 mm | 90% | 0.5 m/s | 1.7 |
| 1985 | 8.4°C | 5.9°C | 3.3°C | 11.7°C | -0.7°C | 161 mm | 92% | 0.4 m/s | 1.6 |
| 1984 | 8.5°C | 6.1°C | 3.7°C | 11.2°C | -1.4°C | 183 mm | 92% | 0.4 m/s | 1.3 |
| 1983 | 7.8°C | 4.7°C | 1.6°C | 11.6°C | -2.7°C | 176 mm | 90% | 0.5 m/s | — |
| 1982 | 7.8°C | 4.6°C | 1.3°C | 11.4°C | -2.9°C | 106 mm | 90% | 0.5 m/s | — |
| 1981 | 7.6°C | 5.0°C | 2.4°C | 11.7°C | -2.8°C | 179 mm | 92% | 0.4 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 8.1°C with lows near 2.5°C (mean 5.3°C), based on 45 years of NASA POWER data.
July averages 155 mm of rainfall in Westport, about average for rainfall. The wettest on record was 302 mm in 1995.
The hottest July reached 13.5°C in 1998. The coldest dipped to -3.4°C in 2007.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 0.8°C. Daytime highs moved from 8°C to 8.8°C and overnight lows from 2.5°C to 3.6°C over the same span.
July is one of the cooler months of the year in Westport and about average for rainfall, so plan for around 8.1°C daytime highs and 2.5°C at night.
Yes — July is the coldest month of the year in Westport, averaging 5.3°C.
For July in Westport, pack warm layers and a jacket for chilly mornings, with typical highs of 8.1°C and lows of 2.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 91% — quite humid.
Average wind speed in July is 0.4 m/s. The windiest July on record averaged 0.5 m/s (1982).
The wettest July on record was 1995 with 302 mm. On average, July sees 155 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 July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.
