July is one of the warmer months of the year in Chatham, with average highs near 26.7°C and lows around 17.6°C (mean 22.2°C). It is a relatively wet time of year, averaging 69 mm of rainfall and 72% relative humidity across the period.
July is one of the warmer months of the year in Chatham. Across 45 years of records, the warmest July in Chatham was 2020 — when the month averaged 25.3°C — while the coldest was 1984 at 18.7°C. Typical July days reach 26.7°C with nights near 17.6°C. The long-term trend is warming, about 0.7°C per decade.
July is a relatively wet time of year in Chatham, averaging 69 mm of rainfall. The wettest July on record was 1992 with 167 mm, while the driest was 2001 at 23 mm.
Relative humidity in Chatham during July averages 72%. The most humid July was 1983 at 80%, and the least humid was 2007 at 63%.
July receives about 6.1 kWh/m²/day of solar energy in Chatham. The sunniest Julys were 2002 and 2020 at 6.6 kWh/m²/day, and the cloudiest were 2000, 2004 and 2013, among others at 5.6.
Average wind speed in Chatham during July is 2.8 m/s. The windiest Julys were 1992, 2006 and 2021, among others at 3.2 m/s, while the calmest was 1989 at 2.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.8°C | 21.9°C | 21.9°C | 22.8°C | 24.0°C | +3.2°C |
| Avg High | 25.3°C | 26.7°C | 26.5°C | 27.1°C | 28.7°C | +3.4°C |
| Avg Low | 16.2°C | 17.1°C | 17.3°C | 18.5°C | 19.3°C | +3.1°C |
| Avg Rain | 81 mm | 57 mm | 68 mm | 82 mm | 51 mm | -30 mm |
July temperatures in Chatham have risen by about 3.6°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 7.9°C (1983) to a record high of 35.3°C (1988).
Rainfall in July is a relatively wet time of year, averaging 69 mm, with a wettest year of 167 mm.
One of the best times to visit Chatham
July is one of the best times to visit Chatham. Expect days averaging 26.7°C and nights around 17.6°C (mean 22.2°C) — warmer than Chatham's yearly average — with moderate rainfall (69 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 | 29.6°C | 24.8°C | 20.0°C | 33.4°C | 14.8°C | 33 mm | 66% | 2.6 m/s | 6.1 |
| 2024 | 28.0°C | 23.5°C | 19.0°C | 31.0°C | 12.1°C | 56 mm | 69% | 2.4 m/s | 6 |
| 2023 | 28.0°C | 23.4°C | 18.8°C | 31.5°C | 16.0°C | 78 mm | 69% | 2.5 m/s | 5.8 |
| 2022 | 29.0°C | 24.0°C | 19.0°C | 32.3°C | 14.8°C | 32 mm | 63% | 3 m/s | 6.3 |
| 2021 | 27.6°C | 22.9°C | 18.3°C | 31.8°C | 13.3°C | 52 mm | 69% | 3.2 m/s | 5.7 |
| 2020 🔥 | 30.2°C | 25.3°C | 20.5°C | 34.1°C | 17.0°C | 53 mm | 67% | 2.6 m/s | 6.6 |
| 2019 | 27.4°C | 23.2°C | 19.1°C | 30.8°C | 14.8°C | 95 mm | 78% | 2.7 m/s | 6.5 |
| 2018 | 26.7°C | 22.7°C | 18.7°C | 30.9°C | 12.6°C | 89 mm | 75% | 2.6 m/s | 6.4 |
| 2017 | 26.0°C | 21.9°C | 17.8°C | 29.9°C | 14.0°C | 78 mm | 78% | 2.6 m/s | 6.1 |
| 2016 | 28.4°C | 23.9°C | 19.4°C | 32.6°C | 12.4°C | 61 mm | 70% | 2.7 m/s | 6.2 |
| 2015 | 25.6°C | 21.1°C | 16.6°C | 30.3°C | 11.8°C | 78 mm | 75% | 2.4 m/s | 6.3 |
| 2014 | 24.2°C | 20.1°C | 16.0°C | 28.4°C | 11.8°C | 95 mm | 75% | 3 m/s | 6 |
| 2013 | 25.6°C | 22.0°C | 18.3°C | 31.5°C | 13.0°C | 93 mm | 80% | 2.7 m/s | 5.6 |
| 2012 | 28.7°C | 24.2°C | 19.7°C | 34.2°C | 15.4°C | 98 mm | 70% | 2.5 m/s | 6.4 |
| 2011 | 29.1°C | 24.6°C | 20.2°C | 33.1°C | 15.3°C | 66 mm | 71% | 2.6 m/s | 6.5 |
| 2010 | 28.8°C | 24.2°C | 19.6°C | 32.9°C | 12.0°C | 72 mm | 69% | 2.9 m/s | 6.4 |
| 2009 | 24.3°C | 20.1°C | 16.0°C | 26.8°C | 12.5°C | 58 mm | 73% | 2.8 m/s | 5.7 |
| 2008 | 26.8°C | 22.4°C | 18.0°C | 29.8°C | 11.4°C | 71 mm | 73% | 3 m/s | 6.5 |
| 2007 | 27.1°C | 22.2°C | 17.3°C | 32.9°C | 11.7°C | 37 mm | 63% | 2.8 m/s | 6.2 |
| 2006 | 28.0°C | 23.6°C | 19.2°C | 32.7°C | 13.0°C | 125 mm | 74% | 3.2 m/s | 6 |
| 2005 | 29.3°C | 24.3°C | 19.4°C | 33.1°C | 14.4°C | 63 mm | 66% | 2.6 m/s | 6.4 |
| 2004 | 25.3°C | 21.1°C | 16.8°C | 29.3°C | 13.3°C | 86 mm | 75% | 2.9 m/s | 5.6 |
| 2003 | 25.9°C | 21.2°C | 16.5°C | 29.6°C | 12.5°C | 56 mm | 71% | 2.9 m/s | 6 |
| 2002 | 28.5°C | 23.1°C | 17.7°C | 32.2°C | 13.0°C | 44 mm | 66% | 2.7 m/s | 6.6 |
| 2001 | 25.7°C | 20.7°C | 15.8°C | 31.6°C | 9.2°C | 23 mm | 69% | 2.8 m/s | 6.5 |
| 2000 | 24.0°C | 20.1°C | 16.2°C | 26.8°C | 12.5°C | 118 mm | 76% | 2.7 m/s | 5.6 |
| 1999 | 28.4°C | 23.7°C | 18.9°C | 32.2°C | 12.2°C | 61 mm | 71% | 3.1 m/s | 6.2 |
| 1998 | 28.0°C | 23.1°C | 18.2°C | 32.0°C | 13.6°C | 65 mm | 64% | 2.9 m/s | 6.3 |
| 1997 | 27.4°C | 22.2°C | 17.1°C | 31.9°C | 11.1°C | 35 mm | 67% | 3 m/s | 6.2 |
| 1996 | 25.4°C | 20.3°C | 15.2°C | 29.4°C | 11.2°C | 47 mm | 68% | 3 m/s | 6.2 |
| 1995 | 27.2°C | 22.6°C | 17.9°C | 34.8°C | 11.9°C | 35 mm | 72% | 3.1 m/s | 5.8 |
| 1994 | 26.3°C | 21.8°C | 17.2°C | 30.3°C | 12.6°C | 47 mm | 72% | 2.8 m/s | 5.9 |
| 1993 | 27.2°C | 22.5°C | 17.9°C | 31.1°C | 13.4°C | 41 mm | 72% | 3.1 m/s | 5.8 |
| 1992 🌧️ | 23.5°C | 19.1°C | 14.7°C | 27.0°C | 10.2°C | 167 mm | 78% | 3.2 m/s | 6 |
| 1991 | 27.8°C | 22.8°C | 17.7°C | 32.8°C | 12.5°C | 25 mm | 64% | 2.9 m/s | 6.4 |
| 1990 | 25.7°C | 21.0°C | 16.3°C | 31.8°C | 12.6°C | 47 mm | 70% | 3.2 m/s | 5.8 |
| 1989 | 25.4°C | 21.2°C | 16.9°C | 29.6°C | 12.3°C | 69 mm | 77% | 2.2 m/s | 6 |
| 1988 | 29.0°C | 23.8°C | 18.5°C | 35.3°C | 10.1°C | 88 mm | 64% | 2.3 m/s | 6.2 |
| 1987 | 25.8°C | 21.6°C | 17.4°C | 30.0°C | 11.8°C | 84 mm | 80% | 2.7 m/s | 6.3 |
| 1986 | 24.4°C | 20.1°C | 15.8°C | 28.6°C | 10.7°C | 74 mm | 80% | 2.9 m/s | 6.4 |
| 1985 | 23.2°C | 19.0°C | 14.7°C | 26.1°C | 9.1°C | 91 mm | 78% | 2.9 m/s | 6.4 |
| 1984 ❄️ | 23.3°C | 18.7°C | 14.1°C | 26.9°C | 8.8°C | 66 mm | 78% | 2.6 m/s | 5.6 |
| 1983 | 25.4°C | 20.8°C | 16.3°C | 29.0°C | 7.9°C | 108 mm | 80% | 2.7 m/s | — |
| 1982 | 25.0°C | 20.2°C | 15.4°C | 28.1°C | 9.2°C | 58 mm | 77% | 2.4 m/s | — |
| 1981 | 26.2°C | 21.6°C | 17.0°C | 30.1°C | 11.5°C | 87 mm | 71% | 2.7 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 26.7°C with lows near 17.6°C (mean 22.2°C), based on 45 years of NASA POWER data.
July averages 69 mm of rainfall in Chatham, a relatively wet time of year. The wettest on record was 167 mm in 1992.
The hottest July reached 35.3°C in 1988. The coldest dipped to 7.9°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 3.6°C. Daytime highs moved from 24.6°C to 28.4°C and overnight lows from 15.5°C to 19°C over the same span.
July is one of the warmer months of the year in Chatham and a relatively wet time of year, so plan for around 26.7°C daytime highs and 17.6°C at night.
Not quite — July is the 12th coolest month in Chatham, averaging 22.2°C.
For July in Chatham, pack light layers you can adjust through the day, with typical highs of 26.7°C and lows of 17.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 72% — moderately humid.
Average wind speed in July is 2.8 m/s. The windiest July on record averaged 3.2 m/s (1990).
The wettest July on record was 1992 with 167 mm. On average, July sees 69 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 Chatham 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.
