October is one of the warmer months of the year in Chatham, with average highs near 12.3°C and lows around 3.2°C (mean 7.8°C). It is about average for rainfall, averaging 79 mm of rainfall and 81% 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 2022 — when the month averaged 11.5°C — while the coldest was 1993 at 4.7°C. Typical October days reach 12.3°C with nights near 3.2°C. The long-term trend is warming, about 0.8°C per decade.
October is about average for rainfall in Chatham, averaging 79 mm of rainfall. The wettest October on record was 2006 with 181 mm, while the driest was 1997 at 25 mm.
Relative humidity in Chatham during October averages 81%. The most humid October was 2005 at 88%, and the least humid was 1985 at 76%.
October receives about 2.3 kWh/m²/day of solar energy in Chatham. The sunniest October was 2022 at 2.8 kWh/m²/day, and the cloudiest was 1991 at 1.9.
Average wind speed in Chatham during October is 0.4 m/s. The windiest October was 1998 at 0.5 m/s, while the calmest were 2022, 2023 and 2025, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.5°C | 6.9°C | 7.8°C | 8.3°C | 10.1°C | +3.6°C |
| Avg High | 11.2°C | 11.4°C | 12.2°C | 12.8°C | 15.2°C | +4°C |
| Avg Low | 1.8°C | 2.4°C | 3.4°C | 3.8°C | 5.1°C | +3.3°C |
| Avg Rain | 73 mm | 91 mm | 105 mm | 65 mm | 49 mm | -24 mm |
October temperatures in Chatham have risen by about 4°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -5.8°C (2020) to a record high of 29.4°C (2025).
Rainfall in October is about average for rainfall, averaging 79 mm, with a wettest year of 181 mm.
A good time to visit Chatham
October is a good time to visit Chatham, with days averaging 12.3°C and nights around 3.2°C (mean 7.8°C, warmer than Chatham's yearly average) and moderate rainfall. July and August 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 | 15.7°C | 10.6°C | 5.4°C | 29.4°C | 0.3°C | 38 mm | 77% | 0.3 m/s | 2.4 |
| 2024 | 14.5°C | 9.6°C | 4.7°C | 23.2°C | -3.9°C | 43 mm | 77% | 0.4 m/s | 2.5 |
| 2023 | 15.6°C | 11.0°C | 6.4°C | 25.4°C | -4.5°C | 45 mm | 83% | 0.3 m/s | 2.1 |
| 2022 🔥 | 17.4°C | 11.5°C | 5.7°C | 22.7°C | -0.4°C | 36 mm | 77% | 0.3 m/s | 2.8 |
| 2021 | 15.6°C | 10.8°C | 6.1°C | 23.7°C | 2.0°C | 39 mm | 81% | 0.3 m/s | 2.3 |
| 2020 | 12.2°C | 7.3°C | 2.5°C | 22.2°C | -5.8°C | 94 mm | 78% | 0.4 m/s | 2.4 |
| 2019 | 12.7°C | 8.3°C | 3.9°C | 16.5°C | -2.4°C | 52 mm | 82% | 0.4 m/s | 2.4 |
| 2018 | 9.5°C | 5.3°C | 1.2°C | 19.7°C | -5.6°C | 74 mm | 79% | 0.4 m/s | 2.2 |
| 2017 | 16.6°C | 11.1°C | 5.7°C | 23.2°C | -0.8°C | 46 mm | 77% | 0.4 m/s | 2.6 |
| 2016 | 13.8°C | 9.0°C | 4.2°C | 24.1°C | -2.6°C | 59 mm | 81% | 0.4 m/s | 2.5 |
| 2015 | 10.9°C | 6.0°C | 1.2°C | 18.5°C | -4.6°C | 39 mm | 79% | 0.4 m/s | 2.5 |
| 2014 | 13.9°C | 9.6°C | 5.4°C | 20.9°C | -1.7°C | 61 mm | 82% | 0.4 m/s | 2.3 |
| 2013 | 13.1°C | 8.3°C | 3.4°C | 22.7°C | -5.0°C | 30 mm | 80% | 0.4 m/s | 2.7 |
| 2012 | 12.8°C | 8.5°C | 4.3°C | 20.2°C | -3.6°C | 119 mm | 84% | 0.4 m/s | 2.2 |
| 2011 | 12.3°C | 8.6°C | 5.0°C | 25.2°C | -2.8°C | 72 mm | 84% | 0.4 m/s | 2.2 |
| 2010 | 11.9°C | 7.8°C | 3.6°C | 25.3°C | -3.9°C | 94 mm | 81% | 0.4 m/s | 2.4 |
| 2009 | 8.9°C | 5.0°C | 1.2°C | 17.2°C | -4.4°C | 127 mm | 84% | 0.4 m/s | 2.1 |
| 2008 | 12.0°C | 7.6°C | 3.2°C | 16.9°C | -5.0°C | 91 mm | 84% | 0.4 m/s | 2.5 |
| 2007 | 14.1°C | 9.3°C | 4.5°C | 22.5°C | -3.4°C | 80 mm | 81% | 0.4 m/s | 2.5 |
| 2006 🌧️ | 11.4°C | 7.4°C | 3.3°C | 20.4°C | -3.2°C | 181 mm | 85% | 0.4 m/s | 2.3 |
| 2005 | 12.6°C | 8.9°C | 5.2°C | 23.8°C | -2.6°C | 168 mm | 88% | 0.4 m/s | 2 |
| 2004 | 13.5°C | 8.9°C | 4.4°C | 21.9°C | -4.1°C | 52 mm | 82% | 0.4 m/s | 2.3 |
| 2003 | 12.5°C | 8.0°C | 3.6°C | 24.8°C | -3.4°C | 143 mm | 80% | 0.4 m/s | 2.3 |
| 2002 | 10.4°C | 5.9°C | 1.3°C | 24.7°C | -4.4°C | 51 mm | 77% | 0.4 m/s | 2.5 |
| 2001 | 14.4°C | 9.3°C | 4.2°C | 24.5°C | -3.4°C | 53 mm | 78% | 0.4 m/s | 2.5 |
| 2000 | 11.7°C | 7.4°C | 3.0°C | 20.7°C | -4.4°C | 105 mm | 82% | 0.4 m/s | 2.1 |
| 1999 | 10.4°C | 6.0°C | 1.5°C | 17.2°C | -5.1°C | 80 mm | 81% | 0.4 m/s | 2.2 |
| 1998 | 10.2°C | 6.5°C | 2.9°C | 16.6°C | -3.8°C | 138 mm | 84% | 0.5 m/s | 2.1 |
| 1997 | 11.2°C | 6.5°C | 1.7°C | 20.3°C | -3.8°C | 25 mm | 76% | 0.4 m/s | 2.3 |
| 1996 | 10.5°C | 6.0°C | 1.5°C | 20.7°C | -3.7°C | 92 mm | 81% | 0.4 m/s | 2.4 |
| 1995 | 14.1°C | 9.5°C | 4.9°C | 22.1°C | -3.2°C | 88 mm | 82% | 0.4 m/s | 2.1 |
| 1994 | 13.4°C | 8.3°C | 3.3°C | 22.2°C | -2.5°C | 29 mm | 76% | 0.4 m/s | 2.6 |
| 1993 ❄️ | 9.5°C | 4.7°C | -0.1°C | 16.3°C | -5.3°C | 92 mm | 80% | 0.4 m/s | 2.2 |
| 1992 | 11.1°C | 6.5°C | 1.9°C | 19.5°C | -4.4°C | 122 mm | 79% | 0.4 m/s | 2.1 |
| 1991 | 12.1°C | 7.8°C | 3.5°C | 18.5°C | -2.4°C | 108 mm | 88% | 0.4 m/s | 1.9 |
| 1990 | 11.9°C | 7.6°C | 3.3°C | 20.2°C | -4.7°C | 133 mm | 85% | 0.4 m/s | 2 |
| 1989 | 12.4°C | 7.4°C | 2.3°C | 20.1°C | -2.8°C | 46 mm | 82% | 0.4 m/s | 2.5 |
| 1988 | 9.8°C | 5.6°C | 1.4°C | 23.5°C | -4.1°C | 139 mm | 84% | 0.4 m/s | 2.2 |
| 1987 | 12.0°C | 7.1°C | 2.3°C | 18.4°C | -3.8°C | 90 mm | 84% | 0.4 m/s | 2.6 |
| 1986 | 10.2°C | 5.3°C | 0.3°C | 16.1°C | -5.0°C | 35 mm | 82% | 0.4 m/s | 2.3 |
| 1985 | 11.6°C | 7.0°C | 2.3°C | 19.9°C | -5.0°C | 46 mm | 76% | 0.4 m/s | 2.4 |
| 1984 | 11.6°C | 6.7°C | 1.7°C | 17.3°C | -3.6°C | 43 mm | 81% | 0.4 m/s | 2.4 |
| 1983 | 11.7°C | 7.2°C | 2.7°C | 23.6°C | -3.3°C | 48 mm | 80% | 0.4 m/s | — |
| 1982 | 11.9°C | 6.9°C | 2.0°C | 19.0°C | -4.6°C | 38 mm | 84% | 0.4 m/s | — |
| 1981 | 10.0°C | 5.7°C | 1.4°C | 15.1°C | -4.8°C | 176 mm | 87% | 0.4 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 12.3°C with lows near 3.2°C (mean 7.8°C), based on 45 years of NASA POWER data.
October averages 79 mm of rainfall in Chatham, about average for rainfall. The wettest on record was 181 mm in 2006.
The hottest October reached 29.4°C in 2025. The coldest dipped to -5.8°C in 2020.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 4°C. Daytime highs moved from 11.4°C to 15.8°C and overnight lows from 2°C to 5.7°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 12.3°C daytime highs and 3.2°C at night.
Not quite — October is the 7th coolest month in Chatham, averaging 7.8°C.
For October in Chatham, pack warm layers and a jacket for chilly mornings, with typical highs of 12.3°C and lows of 3.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 81% — quite humid.
Average wind speed in October is 0.4 m/s. The windiest October on record averaged 0.5 m/s (1998).
The wettest October on record was 2006 with 181 mm. On average, October sees 79 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.
