July is one of the warmer months of the year in Nelson, with average highs near 18.3°C and lows around 11.1°C (mean 14.7°C). It is about average for rainfall, averaging 90 mm of rainfall and 84% relative humidity across the period.
July is one of the warmer months of the year in Nelson. Across 45 years of records, the warmest July in Nelson was 2006 — when the month averaged 17.1°C — while the coldest was 1993 at 12.9°C. Typical July days reach 18.3°C with nights near 11.1°C. The long-term trend is warming, about 0.2°C per decade.
July is about average for rainfall in Nelson, averaging 90 mm of rainfall. The wettest July on record was 2009 with 176 mm, while the driest was 1984 at 27 mm.
Relative humidity in Nelson during July averages 84%. The most humid July was 2012 at 88%, and the least humid was 2006 at 81%.
July receives about 4.9 kWh/m²/day of solar energy in Nelson. The sunniest July was 2006 at 6 kWh/m²/day, and the cloudiest was 2010 at 4.1.
Average wind speed in Nelson during July is 3.1 m/s. The windiest July was 1988 at 4 m/s, while the calmest was 2021 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.4°C | 14.6°C | 14.6°C | 14.9°C | 15.2°C | +0.8°C |
| Avg High | 18.0°C | 18.3°C | 18.1°C | 18.5°C | 18.7°C | +0.7°C |
| Avg Low | 10.8°C | 10.8°C | 11.1°C | 11.2°C | 11.7°C | +0.9°C |
| Avg Rain | 76 mm | 74 mm | 100 mm | 102 mm | 104 mm | +28 mm |
July temperatures in Nelson have risen by about 0.8°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 5.6°C (1990) to a record high of 30.8°C (2022).
Rainfall in July is about average for rainfall, averaging 90 mm, with a wettest year of 176 mm.
One of the best times to visit Nelson
July is one of the best times to visit Nelson. Expect days averaging 18.3°C and nights around 11.1°C (mean 14.7°C) — warmer than Nelson's yearly average — with higher rainfall (90 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 19.8°C | 16.1°C | 12.4°C | 24.8°C | 8.7°C | 88 mm | 84% | 2.8 m/s | 5 |
| 2024 | 18.2°C | 14.6°C | 11.0°C | 23.7°C | 8.3°C | 83 mm | 84% | 2.5 m/s | 4.5 |
| 2023 | 17.5°C | 14.5°C | 11.4°C | 22.4°C | 8.8°C | 174 mm | 85% | 3.7 m/s | 4.6 |
| 2022 | 19.7°C | 16.1°C | 12.4°C | 30.8°C | 9.3°C | 64 mm | 82% | 2.9 m/s | 5 |
| 2021 | 20.1°C | 16.3°C | 12.5°C | 26.2°C | 9.7°C | 85 mm | 84% | 2.1 m/s | 5.2 |
| 2020 | 16.7°C | 13.6°C | 10.4°C | 26.6°C | 7.4°C | 129 mm | 86% | 3.6 m/s | 4.2 |
| 2019 | 19.5°C | 16.0°C | 12.4°C | 27.5°C | 7.0°C | 128 mm | 85% | 2.9 m/s | 4.8 |
| 2018 | 21.0°C | 16.5°C | 12.0°C | 24.7°C | 9.5°C | 60 mm | 81% | 2.3 m/s | 5.4 |
| 2017 | 17.7°C | 14.3°C | 10.8°C | 22.5°C | 8.2°C | 120 mm | 85% | 3.2 m/s | 5 |
| 2016 | 17.7°C | 14.4°C | 11.0°C | 26.1°C | 7.6°C | 98 mm | 86% | 3.3 m/s | 4.7 |
| 2015 | 17.2°C | 13.6°C | 10.0°C | 26.4°C | 7.3°C | 97 mm | 84% | 3.3 m/s | 4.7 |
| 2014 | 19.7°C | 15.7°C | 11.8°C | 24.0°C | 9.2°C | 69 mm | 82% | 2.7 m/s | 5.3 |
| 2013 | 20.7°C | 16.4°C | 12.1°C | 25.7°C | 8.5°C | 82 mm | 83% | 2.4 m/s | 5.6 |
| 2012 | 16.7°C | 13.6°C | 10.6°C | 20.9°C | 6.9°C | 133 mm | 88% | 3 m/s | 4.2 |
| 2011 | 17.4°C | 13.5°C | 9.7°C | 21.1°C | 6.4°C | 87 mm | 83% | 2.5 m/s | 5.1 |
| 2010 | 17.8°C | 14.6°C | 11.5°C | 21.2°C | 7.1°C | 143 mm | 86% | 3.6 m/s | 4.1 |
| 2009 🌧️ | 17.7°C | 14.5°C | 11.4°C | 25.4°C | 8.7°C | 176 mm | 86% | 3.5 m/s | 4.7 |
| 2008 | 18.2°C | 14.8°C | 11.4°C | 23.6°C | 7.2°C | 121 mm | 86% | 3.6 m/s | 4.6 |
| 2007 | 16.4°C | 13.5°C | 10.6°C | 19.2°C | 7.9°C | 164 mm | 87% | 3.5 m/s | 4.5 |
| 2006 🔥 | 21.6°C | 17.1°C | 12.6°C | 26.0°C | 7.5°C | 36 mm | 81% | 2.7 m/s | 6 |
| 2005 | 18.5°C | 15.0°C | 11.5°C | 26.0°C | 9.2°C | 70 mm | 85% | 2.9 m/s | 4.7 |
| 2004 | 16.9°C | 13.7°C | 10.5°C | 22.4°C | 7.3°C | 91 mm | 85% | 3 m/s | 4.6 |
| 2003 | 18.9°C | 15.5°C | 12.0°C | 24.6°C | 9.1°C | 99 mm | 86% | 3.3 m/s | 4.6 |
| 2002 | 16.9°C | 13.6°C | 10.2°C | 23.2°C | 7.4°C | 100 mm | 87% | 2.6 m/s | 4.5 |
| 2001 | 18.3°C | 14.7°C | 11.2°C | 24.1°C | 7.1°C | 60 mm | 84% | 3.2 m/s | 5 |
| 2000 | 17.2°C | 13.5°C | 9.9°C | 23.2°C | 6.1°C | 82 mm | 85% | 2.7 m/s | 5 |
| 1999 | 19.3°C | 15.2°C | 11.1°C | 24.4°C | 6.0°C | 58 mm | 84% | 3.1 m/s | 5.6 |
| 1998 | 16.6°C | 13.6°C | 10.5°C | 20.3°C | 7.8°C | 108 mm | 87% | 3.8 m/s | 4.6 |
| 1997 | 18.6°C | 14.8°C | 11.0°C | 22.5°C | 7.3°C | 87 mm | 84% | 2.8 m/s | 5.2 |
| 1996 | 17.5°C | 13.8°C | 10.2°C | 22.4°C | 6.4°C | 63 mm | 83% | 3 m/s | 5.1 |
| 1995 | 19.9°C | 16.1°C | 12.2°C | 25.6°C | 9.3°C | 59 mm | 83% | 3.3 m/s | 5.2 |
| 1994 | 19.5°C | 15.2°C | 10.9°C | 23.1°C | 7.7°C | 57 mm | 83% | 2.4 m/s | 5.3 |
| 1993 ❄️ | 15.8°C | 12.9°C | 9.9°C | 19.3°C | 6.1°C | 99 mm | 86% | 3.9 m/s | 4.6 |
| 1992 | 17.6°C | 14.0°C | 10.4°C | 21.2°C | 7.1°C | 83 mm | 83% | 3.3 m/s | 4.6 |
| 1991 | 19.4°C | 15.6°C | 11.8°C | 24.0°C | 9.6°C | 71 mm | 85% | 3.5 m/s | 4.7 |
| 1990 | 18.7°C | 14.5°C | 10.3°C | 23.1°C | 5.6°C | 56 mm | 81% | 3.4 m/s | 5.3 |
| 1989 | 19.8°C | 15.8°C | 11.8°C | 24.8°C | 9.0°C | 37 mm | 82% | 2.9 m/s | 5.4 |
| 1988 | 15.8°C | 13.0°C | 10.2°C | 19.0°C | 8.0°C | 171 mm | 86% | 4 m/s | 4.7 |
| 1987 | 17.4°C | 13.9°C | 10.5°C | 22.8°C | 7.2°C | 108 mm | 84% | 3.3 m/s | 4.6 |
| 1986 | 16.6°C | 13.3°C | 9.9°C | 22.2°C | 6.9°C | 76 mm | 85% | 3.3 m/s | 4.3 |
| 1985 | 17.2°C | 13.9°C | 10.7°C | 23.1°C | 8.0°C | 111 mm | 86% | 3.4 m/s | 4.5 |
| 1984 | 19.0°C | 14.8°C | 10.6°C | 23.4°C | 6.5°C | 27 mm | 81% | 2.6 m/s | 5.5 |
| 1983 | 21.0°C | 16.9°C | 12.8°C | 26.8°C | 8.4°C | 43 mm | 84% | 2.2 m/s | — |
| 1982 | 18.8°C | 14.6°C | 10.3°C | 23.3°C | 8.3°C | 39 mm | 83% | 2.9 m/s | — |
| 1981 | 16.6°C | 13.5°C | 10.3°C | 20.0°C | 7.1°C | 74 mm | 86% | 3.3 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 18.3°C with lows near 11.1°C (mean 14.7°C), based on 45 years of NASA POWER data.
July averages 90 mm of rainfall in Nelson, about average for rainfall. The wettest on record was 176 mm in 2009.
The hottest July reached 30.8°C in 2022. The coldest dipped to 5.6°C in 1990.
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 18.5°C to 19.1°C and overnight lows from 10.9°C to 11.9°C over the same span.
July is one of the warmer months of the year in Nelson and about average for rainfall, so plan for around 18.3°C daytime highs and 11.1°C at night.
Not quite — July is the 12th coolest month in Nelson, averaging 14.7°C.
For July in Nelson, pack light layers you can adjust through the day, with typical highs of 18.3°C and lows of 11.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 84% — quite humid.
Average wind speed in July is 3.1 m/s. The windiest July on record averaged 4 m/s (1988).
The wettest July on record was 2009 with 176 mm. On average, July sees 90 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 Nelson 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.
