July is one of the cooler months of the year in Greymouth, with average highs near 9.5°C and lows around 5°C (mean 7.3°C). It is about average for rainfall, averaging 165 mm of rainfall and 87% relative humidity across the period.
July is one of the cooler months of the year in Greymouth. Across 45 years of records, the warmest July in Greymouth was 1998 — when the month averaged 8.6°C — while the coldest was 1995 at 4.8°C. Typical July days reach 9.5°C with nights near 5°C. The long-term trend is warming, about 0.3°C per decade.
July is about average for rainfall in Greymouth, averaging 165 mm of rainfall. The wettest July on record was 2022 with 322 mm, while the driest was 2001 at 31 mm.
Relative humidity in Greymouth during July averages 87%. The most humid July was 2018 at 91%, and the least humid was 2001 at 80%.
July receives about 1.6 kWh/m²/day of solar energy in Greymouth. The sunniest Julys were 1989, 2001 and 2004 at 1.8 kWh/m²/day, and the cloudiest was 1984 at 1.1.
Average wind speed in Greymouth during July is 1.3 m/s. The windiest July was 2016 at 1.7 m/s, while the calmest was 1993 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.0°C | 6.9°C | 7.1°C | 7.5°C | 8.1°C | +1.1°C |
| Avg High | 9.3°C | 9.1°C | 9.4°C | 9.8°C | 10.2°C | +0.9°C |
| Avg Low | 4.8°C | 4.6°C | 4.8°C | 5.3°C | 6.0°C | +1.2°C |
| Avg Rain | 162 mm | 179 mm | 111 mm | 181 mm | 204 mm | +42 mm |
July temperatures in Greymouth have risen by about 0.9°C between 1981–1985 and 2021–2025.
July has ranged from a record low of -0.7°C (2007) to a record high of 14°C (1998).
Rainfall in July is about average for rainfall, averaging 165 mm, with a wettest year of 322 mm.
A quieter season to visit Greymouth
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Greymouth. That said, July — with days averaging 9.5°C and nights around 5°C (mean 7.3°C) and higher rainfall (165 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 | 10.6°C | 8.5°C | 6.4°C | 13.5°C | 3.2°C | 227 mm | 89% | 1.3 m/s | 1.6 |
| 2024 | 10.4°C | 8.1°C | 5.7°C | 12.3°C | 1.6°C | 150 mm | 87% | 1.2 m/s | 1.7 |
| 2023 | 10.2°C | 8.2°C | 6.2°C | 12.3°C | 2.7°C | 159 mm | 88% | 1.5 m/s | 1.6 |
| 2022 🌧️ | 9.4°C | 7.6°C | 5.7°C | 12.6°C | 2.6°C | 322 mm | 89% | 1.5 m/s | 1.3 |
| 2021 | 10.4°C | 8.2°C | 6.0°C | 13.7°C | 2.0°C | 207 mm | 89% | 1.4 m/s | 1.5 |
| 2020 | 10.0°C | 7.9°C | 5.8°C | 12.7°C | 1.2°C | 161 mm | 88% | 1.4 m/s | 1.5 |
| 2019 | 10.7°C | 8.5°C | 6.4°C | 13.4°C | 3.4°C | 310 mm | 91% | 1.3 m/s | 1.4 |
| 2018 | 10.1°C | 8.2°C | 6.3°C | 12.9°C | 2.8°C | 234 mm | 91% | 1.4 m/s | 1.3 |
| 2017 | 9.2°C | 6.8°C | 4.5°C | 12.1°C | 0.2°C | 214 mm | 88% | 1.2 m/s | 1.6 |
| 2016 | 9.8°C | 7.6°C | 5.5°C | 13.2°C | 1.8°C | 230 mm | 86% | 1.7 m/s | 1.5 |
| 2015 | 9.0°C | 6.6°C | 4.3°C | 13.4°C | 0.2°C | 203 mm | 88% | 1.3 m/s | 1.7 |
| 2014 | 9.8°C | 7.3°C | 4.8°C | 12.6°C | 0.7°C | 105 mm | 84% | 1.4 m/s | 1.7 |
| 2013 | 10.2°C | 8.4°C | 6.6°C | 12.2°C | 1.0°C | 163 mm | 89% | 1.3 m/s | 1.4 |
| 2012 | 10.5°C | 8.0°C | 5.6°C | 13.2°C | 0.8°C | 136 mm | 86% | 1.3 m/s | 1.7 |
| 2011 | 9.1°C | 6.9°C | 4.7°C | 11.7°C | 0.4°C | 114 mm | 85% | 1.6 m/s | 1.5 |
| 2010 | 9.5°C | 7.0°C | 4.5°C | 12.1°C | 0.5°C | 105 mm | 87% | 1.1 m/s | 1.7 |
| 2009 | 8.4°C | 6.4°C | 4.5°C | 11.5°C | 0.3°C | 190 mm | 89% | 1.4 m/s | 1.5 |
| 2008 | 9.4°C | 7.2°C | 5.1°C | 11.9°C | 0.6°C | 203 mm | 87% | 1.5 m/s | 1.4 |
| 2007 | 9.0°C | 6.8°C | 4.6°C | 12.5°C | -0.7°C | 84 mm | 85% | 1.3 m/s | 1.7 |
| 2006 | 9.2°C | 7.2°C | 5.3°C | 12.1°C | 1.7°C | 116 mm | 86% | 1.4 m/s | 1.5 |
| 2005 | 10.4°C | 8.3°C | 6.1°C | 13.1°C | 2.6°C | 151 mm | 90% | 1.3 m/s | 1.4 |
| 2004 | 9.1°C | 6.3°C | 3.5°C | 11.6°C | 0.7°C | 108 mm | 85% | 1.2 m/s | 1.8 |
| 2003 | 9.1°C | 6.6°C | 4.2°C | 12.9°C | 0.5°C | 83 mm | 85% | 1.3 m/s | 1.7 |
| 2002 | 9.6°C | 7.2°C | 4.8°C | 12.0°C | 0.9°C | 62 mm | 85% | 1.2 m/s | 1.6 |
| 2001 | 9.2°C | 6.4°C | 3.6°C | 11.8°C | 1.1°C | 31 mm | 80% | 1.1 m/s | 1.8 |
| 2000 | 10.9°C | 8.4°C | 5.8°C | 13.5°C | 1.7°C | 85 mm | 86% | 1.4 m/s | 1.7 |
| 1999 | 10.0°C | 7.7°C | 5.3°C | 12.6°C | 1.2°C | 146 mm | 86% | 1.2 m/s | 1.5 |
| 1998 🔥 | 10.9°C | 8.6°C | 6.3°C | 14.0°C | 3.0°C | 191 mm | 88% | 1.4 m/s | 1.5 |
| 1997 | 9.0°C | 6.8°C | 4.6°C | 12.0°C | 0.8°C | 80 mm | 86% | 1.3 m/s | 1.5 |
| 1996 | 8.5°C | 6.1°C | 3.7°C | 10.9°C | 0.5°C | 124 mm | 85% | 1.3 m/s | 1.6 |
| 1995 ❄️ | 6.5°C | 4.8°C | 3.0°C | 9.4°C | -0.3°C | 313 mm | 89% | 1.5 m/s | 1.5 |
| 1994 | 8.6°C | 6.4°C | 4.2°C | 11.6°C | 0.4°C | 199 mm | 87% | 1.5 m/s | 1.5 |
| 1993 | 10.1°C | 7.7°C | 5.3°C | 12.7°C | 0.7°C | 105 mm | 86% | 1 m/s | 1.7 |
| 1992 | 8.9°C | 6.9°C | 4.9°C | 11.7°C | 0.8°C | 252 mm | 88% | 1.5 m/s | 1.5 |
| 1991 | 8.7°C | 6.3°C | 3.8°C | 10.7°C | 0.7°C | 165 mm | 87% | 1.2 m/s | 1.6 |
| 1990 | 10.0°C | 7.6°C | 5.2°C | 12.2°C | 1.5°C | 214 mm | 87% | 1.3 m/s | 1.6 |
| 1989 | 9.3°C | 6.7°C | 4.2°C | 11.7°C | 0.6°C | 111 mm | 82% | 1.2 m/s | 1.8 |
| 1988 | 9.7°C | 7.6°C | 5.6°C | 12.4°C | 1.6°C | 261 mm | 88% | 1.5 m/s | 1.4 |
| 1987 | 9.5°C | 6.9°C | 4.4°C | 11.9°C | 1.2°C | 106 mm | 86% | 1.3 m/s | 1.7 |
| 1986 | 8.3°C | 6.2°C | 4.1°C | 10.9°C | 1.0°C | 155 mm | 86% | 1.4 m/s | 1.6 |
| 1985 | 9.8°C | 7.8°C | 5.7°C | 12.4°C | 2.6°C | 174 mm | 87% | 1.4 m/s | 1.6 |
| 1984 | 10.1°C | 8.0°C | 5.9°C | 12.8°C | 2.1°C | 187 mm | 88% | 1.3 m/s | 1.1 |
| 1983 | 9.3°C | 6.8°C | 4.4°C | 12.5°C | 0.8°C | 181 mm | 86% | 1.2 m/s | — |
| 1982 | 9.0°C | 6.4°C | 3.9°C | 12.4°C | 1.0°C | 116 mm | 85% | 1.4 m/s | — |
| 1981 | 9.0°C | 6.9°C | 4.9°C | 12.8°C | 1.2°C | 170 mm | 88% | 1.3 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 9.5°C with lows near 5°C (mean 7.3°C), based on 45 years of NASA POWER data.
July averages 165 mm of rainfall in Greymouth, about average for rainfall. The wettest on record was 322 mm in 2022.
The hottest July reached 14°C in 1998. The coldest dipped to -0.7°C in 2007.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 0.9°C. Daytime highs moved from 9.4°C to 10.2°C and overnight lows from 5°C to 6°C over the same span.
July is one of the cooler months of the year in Greymouth and about average for rainfall, so plan for around 9.5°C daytime highs and 5°C at night.
Yes — July is the coldest month of the year in Greymouth, averaging 7.3°C.
For July in Greymouth, pack warm layers and a jacket for chilly mornings, with typical highs of 9.5°C and lows of 5°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 87% — quite humid.
Average wind speed in July is 1.3 m/s. The windiest July on record averaged 1.7 m/s (2016).
The wettest July on record was 2022 with 322 mm. On average, July sees 165 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 Greymouth 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.
