October is one of the warmer months of the year in Chatham, with average highs near 15.6°C and lows around 7.7°C (mean 11.7°C). It is about average for rainfall, averaging 59 mm of rainfall and 76% relative humidity across the period.
October is one of the warmer months of the year in Chatham. Across 45 years of records, the warmest October in Chatham was 2021 — when the month averaged 16°C — while the coldest were 1987 and 1988 at 8.1°C. Typical October days reach 15.6°C with nights near 7.7°C. The long-term trend is warming, about 0.9°C per decade.
October is about average for rainfall in Chatham, averaging 59 mm of rainfall. The wettest October on record was 2012 with 132 mm, while the driest was 2005 at 19 mm.
Relative humidity in Chatham during October averages 76%. The most humid October was 1986 at 84%, and the least humid was 2024 at 68%.
October receives about 2.8 kWh/m²/day of solar energy in Chatham. The sunniest Octobers were 2024 and 2025 at 3.4 kWh/m²/day, and the cloudiest was 2009 at 2.4.
Average wind speed in Chatham during October is 3.9 m/s. The windiest Octobers were 2012 and 2015 at 4.6 m/s, while the calmest was 1984 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.0°C | 11.0°C | 11.6°C | 12.6°C | 13.5°C | +3.5°C |
| Avg High | 14.0°C | 15.3°C | 15.5°C | 16.3°C | 17.5°C | +3.5°C |
| Avg Low | 6.1°C | 6.8°C | 7.8°C | 8.8°C | 9.5°C | +3.4°C |
| Avg Rain | 82 mm | 49 mm | 46 mm | 71 mm | 41 mm | -41 mm |
October temperatures in Chatham have risen by about 3.4°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -2.9°C (1988) to a record high of 30.2°C (2007).
Rainfall in October is about average for rainfall, averaging 59 mm, with a wettest year of 132 mm.
A good time to visit Chatham
October is a good time to visit Chatham, with days averaging 15.6°C and nights around 7.7°C (mean 11.7°C, warmer than Chatham's yearly average) and moderate rainfall. August and July are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 18.4°C | 14.2°C | 10.0°C | 28.6°C | 3.4°C | 59 mm | 71% | 3.9 m/s | 3.4 |
| 2024 | 18.6°C | 14.1°C | 9.6°C | 25.4°C | 5.6°C | 30 mm | 68% | 3.5 m/s | 3.4 |
| 2023 | 16.8°C | 13.2°C | 9.7°C | 27.6°C | -1.3°C | 49 mm | 75% | 4 m/s | 2.5 |
| 2022 | 16.4°C | 12.1°C | 7.9°C | 24.0°C | 3.4°C | 25 mm | 70% | 4 m/s | 3.2 |
| 2021 🔥 | 19.6°C | 16.0°C | 12.4°C | 25.9°C | 6.6°C | 46 mm | 79% | 3.7 m/s | 2.5 |
| 2020 | 15.4°C | 11.5°C | 7.5°C | 23.7°C | 0.5°C | 37 mm | 73% | 4.2 m/s | 2.7 |
| 2019 | 16.7°C | 13.0°C | 9.2°C | 27.0°C | 2.6°C | 85 mm | 79% | 4.1 m/s | 2.8 |
| 2018 | 15.1°C | 11.2°C | 7.3°C | 26.3°C | 0.9°C | 86 mm | 80% | 4.3 m/s | 2.6 |
| 2017 | 18.2°C | 14.4°C | 10.7°C | 25.6°C | 3.1°C | 70 mm | 77% | 4.1 m/s | 2.8 |
| 2016 | 17.8°C | 14.0°C | 10.1°C | 25.1°C | 2.4°C | 34 mm | 76% | 3.9 m/s | 3 |
| 2015 | 16.0°C | 12.3°C | 8.5°C | 22.1°C | 2.3°C | 60 mm | 75% | 4.6 m/s | 2.8 |
| 2014 | 15.6°C | 11.8°C | 8.0°C | 22.7°C | 3.6°C | 61 mm | 79% | 4 m/s | 2.6 |
| 2013 | 16.5°C | 12.8°C | 9.2°C | 25.2°C | 1.1°C | 61 mm | 79% | 3.8 m/s | 3 |
| 2012 🌧️ | 15.0°C | 11.6°C | 8.1°C | 22.3°C | 3.6°C | 132 mm | 79% | 4.6 m/s | 2.5 |
| 2011 | 15.9°C | 12.2°C | 8.5°C | 24.8°C | 2.8°C | 80 mm | 78% | 3.8 m/s | 2.7 |
| 2010 | 16.5°C | 12.5°C | 8.5°C | 23.1°C | 2.5°C | 37 mm | 72% | 4.2 m/s | 3.2 |
| 2009 | 14.1°C | 10.4°C | 6.8°C | 19.5°C | 0.3°C | 49 mm | 76% | 4.2 m/s | 2.4 |
| 2008 | 15.2°C | 11.3°C | 7.4°C | 24.5°C | -0.2°C | 20 mm | 71% | 4.1 m/s | 3.2 |
| 2007 | 19.6°C | 15.8°C | 11.9°C | 30.2°C | 3.7°C | 33 mm | 75% | 4.1 m/s | 3 |
| 2006 | 13.9°C | 10.0°C | 6.1°C | 23.8°C | 1.2°C | 49 mm | 78% | 4.5 m/s | 2.6 |
| 2005 | 16.7°C | 12.9°C | 9.2°C | 26.4°C | 3.8°C | 19 mm | 77% | 3.6 m/s | 3 |
| 2004 | 16.4°C | 12.7°C | 9.0°C | 23.3°C | 3.7°C | 31 mm | 76% | 4 m/s | 2.8 |
| 2003 | 14.0°C | 10.1°C | 6.1°C | 23.4°C | 0.4°C | 43 mm | 77% | 3.6 m/s | 2.9 |
| 2002 | 13.8°C | 9.9°C | 6.0°C | 25.9°C | -0.3°C | 38 mm | 75% | 3.5 m/s | 2.7 |
| 2001 | 14.3°C | 10.7°C | 7.2°C | 22.8°C | 0.9°C | 100 mm | 78% | 4.5 m/s | 2.6 |
| 2000 | 16.7°C | 12.5°C | 8.3°C | 23.3°C | 1.4°C | 80 mm | 79% | 3.5 m/s | 2.9 |
| 1999 | 14.8°C | 10.7°C | 6.7°C | 21.6°C | 2.1°C | 50 mm | 74% | 3.9 m/s | 3 |
| 1998 | 16.9°C | 12.7°C | 8.5°C | 23.3°C | 4.0°C | 41 mm | 74% | 3.8 m/s | 3.2 |
| 1997 | 16.3°C | 12.0°C | 7.6°C | 27.2°C | -1.0°C | 29 mm | 72% | 3.8 m/s | 3.1 |
| 1996 | 14.8°C | 10.6°C | 6.3°C | 21.7°C | -0.5°C | 45 mm | 79% | 4.1 m/s | 2.7 |
| 1995 | 15.9°C | 11.6°C | 7.4°C | 24.0°C | 2.6°C | 59 mm | 76% | 4.5 m/s | 2.6 |
| 1994 | 16.0°C | 11.8°C | 7.6°C | 21.9°C | 2.8°C | 31 mm | 74% | 3.5 m/s | 3 |
| 1993 | 13.8°C | 9.2°C | 4.6°C | 22.3°C | -1.1°C | 45 mm | 76% | 4 m/s | 2.8 |
| 1992 | 13.6°C | 9.4°C | 5.2°C | 21.9°C | -0.6°C | 46 mm | 77% | 3.7 m/s | 2.8 |
| 1991 | 15.5°C | 11.7°C | 7.8°C | 24.3°C | -0.1°C | 66 mm | 73% | 4 m/s | 2.8 |
| 1990 | 15.0°C | 10.8°C | 6.6°C | 23.8°C | -0.4°C | 76 mm | 77% | 4.2 m/s | 2.9 |
| 1989 | 15.2°C | 10.6°C | 6.0°C | 22.5°C | 0.1°C | 35 mm | 78% | 3.8 m/s | 2.9 |
| 1988 | 11.5°C | 8.1°C | 4.8°C | 25.0°C | -2.9°C | 124 mm | 76% | 4.3 m/s | 2.7 |
| 1987 ❄️ | 12.0°C | 8.1°C | 4.2°C | 17.7°C | 0.9°C | 98 mm | 78% | 3.7 m/s | 2.9 |
| 1986 | 14.4°C | 10.6°C | 6.9°C | 19.9°C | -0.3°C | 88 mm | 84% | 3.5 m/s | 2.6 |
| 1985 | 14.4°C | 10.6°C | 6.8°C | 19.4°C | 1.5°C | 106 mm | 78% | 3.5 m/s | 2.7 |
| 1984 | 16.1°C | 12.0°C | 7.8°C | 20.6°C | 2.4°C | 39 mm | 81% | 2.9 m/s | 2.9 |
| 1983 | 14.2°C | 10.3°C | 6.4°C | 22.3°C | -1.4°C | 95 mm | 79% | 3.8 m/s | — |
| 1982 | 15.5°C | 11.0°C | 6.5°C | 23.2°C | 0.3°C | 37 mm | 76% | 3.3 m/s | — |
| 1981 | 12.4°C | 8.8°C | 5.2°C | 18.7°C | -2.8°C | 114 mm | 80% | 4.1 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 15.6°C with lows near 7.7°C (mean 11.7°C), based on 45 years of NASA POWER data.
October averages 59 mm of rainfall in Chatham, about average for rainfall. The wettest on record was 132 mm in 2012.
The hottest October reached 30.2°C in 2007. The coldest dipped to -2.9°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 3.4°C. Daytime highs moved from 14.5°C to 18°C and overnight lows from 6.5°C to 9.9°C over the same span.
October is one of the warmer months of the year in Chatham and about average for rainfall, so plan for around 15.6°C daytime highs and 7.7°C at night.
Not quite — October is the 7th coolest month in Chatham, averaging 11.7°C.
For October in Chatham, pack warm layers and a jacket for chilly mornings, with typical highs of 15.6°C and lows of 7.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 76% — quite humid.
Average wind speed in October is 3.9 m/s. The windiest October on record averaged 4.6 m/s (2012).
The wettest October on record was 2012 with 132 mm. On average, October sees 59 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 October, 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 October specifically, along with year-by-year records and how the month has changed over the decades.
