July is one of the cooler months of the year in New Plymouth, with average highs near 11.9°C and lows around 7.1°C (mean 9.5°C). It is a relatively wet time of year, averaging 129 mm of rainfall and 88% relative humidity across the period.
July is one of the cooler months of the year in New Plymouth. Across 45 years of records, the warmest July in New Plymouth was 1998 — when the month averaged 11.4°C — while the coldest were 1983 and 1991 at 8.3°C. Typical July days reach 11.9°C with nights near 7.1°C. The long-term trend is warming, about 0.2°C per decade.
July is a relatively wet time of year in New Plymouth, averaging 129 mm of rainfall. The wettest July on record was 2025 with 259 mm, while the driest was 1983 at 46 mm.
Relative humidity in New Plymouth during July averages 88%. The most humid July was 1996 at 91%, and the least humid was 2000 at 85%.
July receives about 1.9 kWh/m²/day of solar energy in New Plymouth. The sunniest Julys were 2003, 2004 and 2010, among others at 2.1 kWh/m²/day, and the cloudiest were 1984, 1998 and 2008 at 1.6.
Average wind speed in New Plymouth during July is 4.2 m/s. The windiest July was 2016 at 5.3 m/s, while the calmest was 1993 at 3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.2°C | 9.2°C | 9.4°C | 9.5°C | 10.3°C | +1.1°C |
| Avg High | 11.7°C | 11.5°C | 12.0°C | 11.9°C | 12.5°C | +0.8°C |
| Avg Low | 6.7°C | 7.0°C | 6.9°C | 7.2°C | 8.1°C | +1.4°C |
| Avg Rain | 113 mm | 150 mm | 107 mm | 126 mm | 160 mm | +47 mm |
July temperatures in New Plymouth have risen by about 0.9°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 0.7°C (2001) to a record high of 16.7°C (1998).
Rainfall in July is a relatively wet time of year, averaging 129 mm, with a wettest year of 259 mm.
A quieter season to visit New Plymouth
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting New Plymouth. That said, July — with days averaging 11.9°C and nights around 7.1°C (mean 9.5°C) and higher rainfall (129 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 🌧️ | 12.6°C | 10.1°C | 7.6°C | 16.2°C | 2.7°C | 259 mm | 89% | 4 m/s | 1.9 |
| 2024 | 12.4°C | 10.0°C | 7.6°C | 13.9°C | 3.8°C | 118 mm | 90% | 3.6 m/s | 1.9 |
| 2023 | 12.3°C | 10.4°C | 8.4°C | 13.8°C | 4.9°C | 91 mm | 88% | 4.9 m/s | 1.9 |
| 2022 | 12.9°C | 11.0°C | 9.2°C | 16.1°C | 3.9°C | 226 mm | 89% | 5 m/s | 1.8 |
| 2021 | 12.5°C | 10.2°C | 7.8°C | 15.8°C | 2.2°C | 127 mm | 88% | 4.3 m/s | 2 |
| 2020 | 12.4°C | 10.1°C | 7.8°C | 15.6°C | 4.4°C | 140 mm | 87% | 4 m/s | 1.9 |
| 2019 | 13.1°C | 10.8°C | 8.6°C | 15.2°C | 4.7°C | 222 mm | 90% | 4.2 m/s | 1.8 |
| 2018 | 12.0°C | 10.1°C | 8.2°C | 14.1°C | 4.8°C | 163 mm | 88% | 4.1 m/s | 2 |
| 2017 | 11.5°C | 9.5°C | 7.5°C | 15.1°C | 3.0°C | 183 mm | 89% | 4.3 m/s | 1.8 |
| 2016 | 12.3°C | 9.9°C | 7.6°C | 15.2°C | 3.3°C | 136 mm | 85% | 5.3 m/s | 2 |
| 2015 | 11.1°C | 8.7°C | 6.2°C | 13.4°C | 1.9°C | 124 mm | 89% | 4.3 m/s | 1.9 |
| 2014 | 11.7°C | 8.9°C | 6.2°C | 15.1°C | 2.6°C | 50 mm | 86% | 4.5 m/s | 2 |
| 2013 | 12.2°C | 10.2°C | 8.2°C | 14.9°C | 4.5°C | 57 mm | 88% | 3.7 m/s | 1.8 |
| 2012 | 12.0°C | 9.4°C | 6.7°C | 14.6°C | 1.6°C | 159 mm | 88% | 3.9 m/s | 1.9 |
| 2011 | 11.5°C | 9.0°C | 6.6°C | 14.8°C | 2.3°C | 114 mm | 87% | 4.8 m/s | 1.9 |
| 2010 | 11.6°C | 8.8°C | 6.1°C | 13.9°C | 1.2°C | 55 mm | 87% | 3.6 m/s | 2.1 |
| 2009 | 11.3°C | 8.7°C | 6.1°C | 13.8°C | 1.9°C | 105 mm | 88% | 4.2 m/s | 1.9 |
| 2008 | 11.8°C | 9.7°C | 7.7°C | 15.2°C | 2.8°C | 202 mm | 88% | 5.1 m/s | 1.6 |
| 2007 | 12.2°C | 9.8°C | 7.4°C | 14.8°C | 2.6°C | 143 mm | 88% | 4.7 m/s | 1.7 |
| 2006 | 12.0°C | 9.3°C | 6.7°C | 14.5°C | 2.5°C | 112 mm | 88% | 4 m/s | 2 |
| 2005 | 12.5°C | 10.3°C | 8.1°C | 14.7°C | 3.4°C | 108 mm | 89% | 4.4 m/s | 1.7 |
| 2004 | 11.3°C | 8.5°C | 5.7°C | 13.5°C | 1.2°C | 90 mm | 88% | 4.1 m/s | 2.1 |
| 2003 | 11.6°C | 8.7°C | 5.8°C | 13.7°C | 2.2°C | 96 mm | 85% | 3.8 m/s | 2.1 |
| 2002 | 12.0°C | 9.9°C | 7.8°C | 13.9°C | 3.5°C | 98 mm | 88% | 4.8 m/s | 1.7 |
| 2001 | 11.6°C | 8.5°C | 5.5°C | 13.6°C | 0.7°C | 59 mm | 86% | 3.5 m/s | 2 |
| 2000 | 13.8°C | 10.8°C | 7.8°C | 16.1°C | 3.6°C | 63 mm | 85% | 4.7 m/s | 2 |
| 1999 | 12.2°C | 9.9°C | 7.6°C | 16.3°C | 3.1°C | 97 mm | 87% | 4 m/s | 1.9 |
| 1998 🔥 | 13.8°C | 11.4°C | 9.1°C | 16.7°C | 5.4°C | 176 mm | 89% | 4.7 m/s | 1.6 |
| 1997 | 11.1°C | 8.6°C | 6.2°C | 13.2°C | 2.3°C | 47 mm | 86% | 3.7 m/s | 1.9 |
| 1996 | 11.4°C | 9.1°C | 6.9°C | 14.1°C | 2.5°C | 164 mm | 91% | 3.9 m/s | 1.8 |
| 1995 | 10.4°C | 8.5°C | 6.6°C | 12.9°C | 2.0°C | 199 mm | 88% | 4.7 m/s | 1.8 |
| 1994 | 10.7°C | 8.6°C | 6.6°C | 13.5°C | 1.3°C | 192 mm | 88% | 4.5 m/s | 1.8 |
| 1993 | 11.4°C | 8.8°C | 6.3°C | 14.9°C | 2.7°C | 74 mm | 89% | 3 m/s | 2 |
| 1992 | 11.4°C | 9.4°C | 7.4°C | 14.3°C | 3.6°C | 250 mm | 90% | 5 m/s | 1.8 |
| 1991 | 10.9°C | 8.3°C | 5.7°C | 13.1°C | 1.8°C | 139 mm | 89% | 3.7 m/s | 1.9 |
| 1990 | 11.8°C | 9.6°C | 7.4°C | 13.5°C | 2.3°C | 162 mm | 89% | 4.3 m/s | 1.9 |
| 1989 | 11.6°C | 8.7°C | 5.7°C | 14.3°C | 2.0°C | 141 mm | 85% | 3.1 m/s | 2.1 |
| 1988 | 12.1°C | 9.9°C | 7.7°C | 14.5°C | 3.6°C | 166 mm | 88% | 4.8 m/s | 1.9 |
| 1987 | 11.5°C | 9.0°C | 6.4°C | 13.9°C | 2.8°C | 59 mm | 86% | 3.7 m/s | 1.9 |
| 1986 | 11.2°C | 8.5°C | 5.8°C | 12.9°C | 0.8°C | 127 mm | 85% | 4.1 m/s | 2 |
| 1985 | 12.4°C | 10.4°C | 8.5°C | 15.5°C | 5.1°C | 125 mm | 88% | 4.6 m/s | 1.9 |
| 1984 | 12.3°C | 10.0°C | 7.7°C | 14.8°C | 3.8°C | 131 mm | 90% | 4.3 m/s | 1.6 |
| 1983 ❄️ | 11.1°C | 8.3°C | 5.6°C | 14.4°C | 0.9°C | 46 mm | 88% | 3.9 m/s | — |
| 1982 | 11.4°C | 8.6°C | 5.7°C | 14.2°C | 1.3°C | 66 mm | 85% | 4.2 m/s | — |
| 1981 | 11.7°C | 9.5°C | 7.4°C | 14.6°C | 3.1°C | 156 mm | 89% | 4.9 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 11.9°C with lows near 7.1°C (mean 9.5°C), based on 45 years of NASA POWER data.
July averages 129 mm of rainfall in New Plymouth, a relatively wet time of year. The wettest on record was 259 mm in 2025.
The hottest July reached 16.7°C in 1998. The coldest dipped to 0.7°C in 2001.
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 11.8°C to 12.5°C and overnight lows from 7°C to 8.1°C over the same span.
July is one of the cooler months of the year in New Plymouth and a relatively wet time of year, so plan for around 11.9°C daytime highs and 7.1°C at night.
Yes — July is the coldest month of the year in New Plymouth, averaging 9.5°C.
For July in New Plymouth, pack warm layers and a jacket for chilly mornings, with typical highs of 11.9°C and lows of 7.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 88% — quite humid.
Average wind speed in July is 4.2 m/s. The windiest July on record averaged 5.3 m/s (2016).
The wettest July on record was 2025 with 259 mm. On average, July sees 129 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 New Plymouth 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.
