July is one of the warmer months of the year in Nelson, with average highs near 21.5°C and lows around 9.5°C (mean 15.5°C). It is one of the drier months, averaging 45 mm of rainfall and 64% 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 2021 — when the month averaged 19.7°C — while the coldest was 1993 at 11.1°C. Typical July days reach 21.5°C with nights near 9.5°C. The long-term trend is warming, about 0.6°C per decade.
July is one of the drier months in Nelson, averaging 45 mm of rainfall. The wettest July on record was 1993 with 127 mm, while the driest was 1985 at 3 mm.
Relative humidity in Nelson during July averages 64%. The most humid July was 1993 at 77%, and the least humid was 2003 at 49%.
July receives about 6.5 kWh/m²/day of solar energy in Nelson. The sunniest Julys were 1985 and 2017 at 7.5 kWh/m²/day, and the cloudiest was 1993 at 4.9.
Average wind speed in Nelson during July is 0.3 m/s. The windiest July was 2003 at 0.4 m/s, while the calmest were 1982, 1983 and 1993 at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.4°C | 14.8°C | 16.5°C | 15.4°C | 16.9°C | +2.5°C |
| Avg High | 20.5°C | 20.6°C | 22.9°C | 21.2°C | 22.9°C | +2.4°C |
| Avg Low | 8.4°C | 9.0°C | 10.1°C | 9.6°C | 10.8°C | +2.4°C |
| Avg Rain | 54 mm | 57 mm | 29 mm | 42 mm | 45 mm | -9 mm |
July temperatures in Nelson have risen by about 3°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 1°C (1981) to a record high of 32.3°C (1994).
Rainfall in July is one of the drier months, averaging 45 mm, with a wettest year of 127 mm.
One of the best times to visit Nelson
July is one of the best times to visit Nelson. Expect days averaging 21.5°C and nights around 9.5°C (mean 15.5°C) — warmer than Nelson's yearly average — with moderate rainfall (45 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 | 21.0°C | 15.4°C | 9.8°C | 29.9°C | 4.7°C | 64 mm | 73% | 0.3 m/s | 6.1 |
| 2024 | 24.4°C | 18.2°C | 11.9°C | 31.0°C | 5.4°C | 21 mm | 64% | 0.3 m/s | 6.8 |
| 2023 | 22.9°C | 16.5°C | 10.0°C | 29.1°C | 5.3°C | 71 mm | 63% | 0.3 m/s | 6.8 |
| 2022 | 22.8°C | 17.2°C | 11.6°C | 31.2°C | 5.3°C | 41 mm | 68% | 0.3 m/s | 6.7 |
| 2021 🔥 | 26.3°C | 19.7°C | 13.0°C | 31.2°C | 5.4°C | 21 mm | 57% | 0.3 m/s | 7.2 |
| 2020 | 19.9°C | 14.1°C | 8.4°C | 28.5°C | 3.0°C | 51 mm | 71% | 0.3 m/s | 6.4 |
| 2019 | 19.4°C | 14.1°C | 8.9°C | 26.7°C | 3.4°C | 83 mm | 73% | 0.3 m/s | 5.6 |
| 2018 | 21.8°C | 15.6°C | 9.5°C | 28.6°C | 3.2°C | 27 mm | 65% | 0.3 m/s | 7 |
| 2017 | 23.1°C | 17.0°C | 11.0°C | 29.3°C | 4.7°C | 11 mm | 61% | 0.3 m/s | 7.5 |
| 2016 | 19.0°C | 13.8°C | 8.5°C | 26.8°C | 5.0°C | 55 mm | 74% | 0.3 m/s | 5.7 |
| 2015 | 21.7°C | 16.0°C | 10.3°C | 29.6°C | 3.9°C | 41 mm | 66% | 0.3 m/s | 6.4 |
| 2014 | 22.9°C | 16.9°C | 10.9°C | 31.3°C | 3.6°C | 29 mm | 65% | 0.3 m/s | 6.8 |
| 2013 | 22.2°C | 16.0°C | 9.8°C | 29.6°C | 5.0°C | 21 mm | 63% | 0.3 m/s | 7.4 |
| 2012 | 22.3°C | 16.5°C | 10.7°C | 28.6°C | 3.4°C | 69 mm | 68% | 0.3 m/s | 6.3 |
| 2011 | 18.9°C | 13.1°C | 7.3°C | 23.9°C | 1.3°C | 53 mm | 69% | 0.3 m/s | 6.1 |
| 2010 | 20.9°C | 14.8°C | 8.8°C | 26.8°C | 3.1°C | 31 mm | 61% | 0.3 m/s | 6.2 |
| 2009 | 22.9°C | 16.4°C | 9.8°C | 28.7°C | 3.1°C | 58 mm | 59% | 0.3 m/s | 6.5 |
| 2008 | 22.1°C | 15.8°C | 9.5°C | 27.1°C | 1.9°C | 19 mm | 57% | 0.3 m/s | 6.7 |
| 2007 | 25.1°C | 18.6°C | 12.1°C | 31.1°C | 6.3°C | 12 mm | 56% | 0.3 m/s | 7.2 |
| 2006 | 23.6°C | 17.5°C | 11.5°C | 31.0°C | 3.7°C | 27 mm | 60% | 0.3 m/s | 7 |
| 2005 | 21.0°C | 14.8°C | 8.5°C | 27.7°C | 4.4°C | 36 mm | 63% | 0.3 m/s | 6.7 |
| 2004 | 23.1°C | 16.7°C | 10.2°C | 29.8°C | 2.5°C | 32 mm | 60% | 0.3 m/s | 6.4 |
| 2003 | 24.8°C | 17.9°C | 11.0°C | 31.9°C | 3.4°C | 4 mm | 49% | 0.4 m/s | 7.4 |
| 2002 | 23.0°C | 16.6°C | 10.1°C | 31.1°C | 2.3°C | 34 mm | 56% | 0.3 m/s | 6.8 |
| 2001 | 22.0°C | 15.7°C | 9.5°C | 29.8°C | 4.6°C | 30 mm | 54% | 0.3 m/s | 6.4 |
| 2000 | 20.9°C | 14.9°C | 8.8°C | 28.3°C | 2.0°C | 32 mm | 62% | 0.3 m/s | 6.5 |
| 1999 | 18.5°C | 12.8°C | 7.1°C | 25.8°C | 2.1°C | 40 mm | 67% | 0.3 m/s | 6.4 |
| 1998 | 23.2°C | 17.8°C | 12.3°C | 30.0°C | 7.4°C | 84 mm | 67% | 0.3 m/s | 6.3 |
| 1997 | 19.3°C | 13.9°C | 8.6°C | 25.3°C | 4.5°C | 74 mm | 71% | 0.3 m/s | 6.4 |
| 1996 | 21.6°C | 15.3°C | 9.0°C | 27.6°C | 2.8°C | 35 mm | 64% | 0.3 m/s | 6.8 |
| 1995 | 21.0°C | 15.1°C | 9.2°C | 26.7°C | 5.2°C | 38 mm | 62% | 0.3 m/s | 5.8 |
| 1994 | 23.9°C | 17.3°C | 10.8°C | 32.3°C | 3.2°C | 14 mm | 55% | 0.3 m/s | 6.8 |
| 1993 ❄️ 🌧️ | 16.3°C | 11.1°C | 5.8°C | 23.9°C | 2.5°C | 127 mm | 77% | 0.2 m/s | 4.9 |
| 1992 | 20.1°C | 14.4°C | 8.6°C | 28.7°C | 4.2°C | 64 mm | 66% | 0.3 m/s | 5.8 |
| 1991 | 20.6°C | 14.8°C | 8.9°C | 25.5°C | 2.5°C | 41 mm | 65% | 0.3 m/s | 6.2 |
| 1990 | 21.9°C | 15.7°C | 9.5°C | 28.5°C | 3.8°C | 54 mm | 67% | 0.3 m/s | 6.3 |
| 1989 | 22.3°C | 15.5°C | 8.8°C | 30.5°C | 3.7°C | 34 mm | 59% | 0.3 m/s | 6.8 |
| 1988 | 22.0°C | 15.1°C | 8.3°C | 29.6°C | 1.1°C | 23 mm | 56% | 0.3 m/s | 6 |
| 1987 | 20.8°C | 15.0°C | 9.1°C | 28.0°C | 3.6°C | 76 mm | 64% | 0.3 m/s | 5.4 |
| 1986 | 17.5°C | 12.1°C | 6.7°C | 24.8°C | 2.5°C | 58 mm | 68% | 0.3 m/s | 5.4 |
| 1985 | 25.4°C | 18.1°C | 10.9°C | 31.1°C | 6.2°C | 3 mm | 50% | 0.3 m/s | 7.5 |
| 1984 | 21.4°C | 15.1°C | 8.9°C | 27.9°C | 3.0°C | 15 mm | 65% | 0.3 m/s | 6.5 |
| 1983 | 17.8°C | 12.5°C | 7.2°C | 28.2°C | 3.9°C | 109 mm | 76% | 0.2 m/s | — |
| 1982 | 18.5°C | 13.2°C | 8.0°C | 26.6°C | 1.0°C | 81 mm | 73% | 0.2 m/s | — |
| 1981 | 18.7°C | 13.1°C | 7.4°C | 24.3°C | 1.0°C | 86 mm | 72% | 0.3 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 21.5°C with lows near 9.5°C (mean 15.5°C), based on 45 years of NASA POWER data.
July averages 45 mm of rainfall in Nelson, one of the drier months. The wettest on record was 127 mm in 1993.
The hottest July reached 32.3°C in 1994. The coldest dipped to 1°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 3°C. Daytime highs moved from 20.4°C to 23.5°C and overnight lows from 8.5°C to 11.3°C over the same span.
July is one of the warmer months of the year in Nelson and one of the drier months, so plan for around 21.5°C daytime highs and 9.5°C at night.
Not quite — July is the 12th coolest month in Nelson, averaging 15.5°C.
For July in Nelson, pack light layers you can adjust through the day, with typical highs of 21.5°C and lows of 9.5°C.
Relative humidity in July averages 64% — moderately humid.
Average wind speed in July is 0.3 m/s. The windiest July on record averaged 0.4 m/s (2003).
The wettest July on record was 1993 with 127 mm. On average, July sees 45 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.
