October is one of the cooler months of the year in Hamilton, with average highs near 16.6°C and lows around 10°C (mean 13.3°C). It is about average for rainfall, averaging 97 mm of rainfall and 81% relative humidity across the period.
October is one of the cooler months of the year in Hamilton. Across 45 years of records, the warmest October in Hamilton was 2001 — when the month averaged 15°C — while the coldest were 1982, 2002 and 2009 at 11.8°C. Typical October days reach 16.6°C with nights near 10°C. The long-term October temperature trend is broadly flat.
October is about average for rainfall in Hamilton, averaging 97 mm of rainfall. The wettest October on record was 2025 with 185 mm, while the driest was 1984 at 29 mm.
Relative humidity in Hamilton during October averages 81%. The most humid October was 2025 at 85%, and the least humid was 1985 at 78%.
October receives about 4.8 kWh/m²/day of solar energy in Hamilton. The sunniest Octobers were 2002 and 2018 at 5.3 kWh/m²/day, and the cloudiest were 1995 and 2025 at 4.2.
Average wind speed in Hamilton during October is 4.5 m/s. The windiest October was 1998 at 5.8 m/s, while the calmest was 2018 at 3.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.3°C | 13.1°C | 13.1°C | 13.3°C | 14.1°C | +0.8°C |
| Avg High | 16.6°C | 16.4°C | 16.4°C | 16.6°C | 17.3°C | +0.7°C |
| Avg Low | 10.0°C | 9.8°C | 9.8°C | 10.0°C | 10.8°C | +0.8°C |
| Avg Rain | 95 mm | 99 mm | 101 mm | 75 mm | 128 mm | +32 mm |
October temperatures in Hamilton have risen by about 1°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 3.1°C (2003) to a record high of 23°C (1983).
Rainfall in October is about average for rainfall, averaging 97 mm, with a wettest year of 185 mm.
A good time to visit Hamilton
October is a good time to visit Hamilton, with days averaging 16.6°C and nights around 10°C (mean 13.3°C, cooler than Hamilton's yearly average) and higher rainfall. February and January 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 🌧️ | 16.9°C | 14.2°C | 11.5°C | 20.0°C | 8.5°C | 185 mm | 85% | 4.9 m/s | 4.2 |
| 2024 | 17.0°C | 13.8°C | 10.5°C | 20.4°C | 6.7°C | 129 mm | 81% | 4.2 m/s | 4.8 |
| 2023 | 17.2°C | 13.9°C | 10.5°C | 21.5°C | 4.0°C | 75 mm | 82% | 4.3 m/s | 4.9 |
| 2022 | 17.2°C | 13.9°C | 10.6°C | 21.1°C | 5.2°C | 164 mm | 81% | 3.6 m/s | 4.8 |
| 2021 | 17.2°C | 14.0°C | 10.9°C | 21.9°C | 5.0°C | 131 mm | 83% | 4.1 m/s | 4.8 |
| 2020 | 18.1°C | 14.5°C | 10.9°C | 21.2°C | 5.8°C | 83 mm | 82% | 3.4 m/s | 4.9 |
| 2019 | 16.2°C | 13.1°C | 10.0°C | 19.9°C | 6.3°C | 81 mm | 82% | 4.8 m/s | 4.7 |
| 2018 | 17.2°C | 13.4°C | 9.7°C | 20.8°C | 5.6°C | 67 mm | 81% | 3.3 m/s | 5.3 |
| 2017 | 16.5°C | 13.7°C | 10.8°C | 20.2°C | 5.8°C | 91 mm | 84% | 4.5 m/s | 4.5 |
| 2016 | 16.7°C | 13.4°C | 10.1°C | 19.9°C | 6.3°C | 89 mm | 82% | 4.4 m/s | 5 |
| 2015 | 16.4°C | 13.3°C | 10.1°C | 18.8°C | 6.3°C | 36 mm | 82% | 4.6 m/s | 5 |
| 2014 | 16.6°C | 13.2°C | 9.8°C | 20.0°C | 4.4°C | 74 mm | 81% | 4.6 m/s | 4.7 |
| 2013 | 16.8°C | 13.5°C | 10.2°C | 20.8°C | 5.2°C | 59 mm | 82% | 4.6 m/s | 4.9 |
| 2012 | 15.9°C | 12.6°C | 9.4°C | 21.7°C | 4.5°C | 84 mm | 80% | 5 m/s | 4.9 |
| 2011 | 17.0°C | 13.7°C | 10.4°C | 20.9°C | 7.3°C | 139 mm | 84% | 4.1 m/s | 4.4 |
| 2010 | 16.8°C | 13.0°C | 9.1°C | 21.0°C | 5.5°C | 34 mm | 78% | 4.1 m/s | 5.2 |
| 2009 | 15.2°C | 11.8°C | 8.5°C | 18.8°C | 4.5°C | 119 mm | 81% | 4.7 m/s | 4.7 |
| 2008 | 16.1°C | 13.2°C | 10.3°C | 19.1°C | 6.4°C | 83 mm | 81% | 4.9 m/s | 4.6 |
| 2007 | 16.1°C | 13.0°C | 9.9°C | 18.4°C | 4.9°C | 74 mm | 80% | 5.4 m/s | 4.9 |
| 2006 | 15.5°C | 12.5°C | 9.5°C | 18.3°C | 4.4°C | 114 mm | 81% | 5.1 m/s | 4.4 |
| 2005 | 17.6°C | 14.2°C | 10.9°C | 21.5°C | 8.1°C | 159 mm | 79% | 3.7 m/s | 4.8 |
| 2004 | 16.0°C | 12.9°C | 9.8°C | 19.7°C | 3.9°C | 110 mm | 83% | 4.6 m/s | 4.5 |
| 2003 | 16.6°C | 12.9°C | 9.2°C | 20.5°C | 3.1°C | 115 mm | 80% | 4.1 m/s | 4.9 |
| 2002 | 15.3°C | 11.8°C | 8.4°C | 17.8°C | 3.2°C | 66 mm | 78% | 4.8 m/s | 5.3 |
| 2001 🔥 | 18.4°C | 15.0°C | 11.6°C | 21.1°C | 5.4°C | 111 mm | 82% | 4.4 m/s | 4.4 |
| 2000 | 17.1°C | 13.6°C | 10.0°C | 20.1°C | 3.6°C | 58 mm | 80% | 4.8 m/s | 5.1 |
| 1999 | 18.0°C | 14.3°C | 10.6°C | 21.8°C | 4.4°C | 38 mm | 80% | 3.8 m/s | 4.8 |
| 1998 | 17.2°C | 14.3°C | 11.4°C | 21.3°C | 7.3°C | 180 mm | 81% | 5.8 m/s | 4.8 |
| 1997 | 16.2°C | 13.0°C | 9.7°C | 20.7°C | 7.1°C | 78 mm | 82% | 4.9 m/s | 4.8 |
| 1996 | 16.5°C | 13.2°C | 9.9°C | 19.5°C | 6.8°C | 74 mm | 81% | 4.4 m/s | 4.8 |
| 1995 | 15.9°C | 12.9°C | 9.8°C | 19.8°C | 5.8°C | 118 mm | 84% | 4.3 m/s | 4.2 |
| 1994 | 15.4°C | 12.0°C | 8.6°C | 20.1°C | 3.2°C | 121 mm | 82% | 4.8 m/s | 4.6 |
| 1993 | 16.7°C | 13.0°C | 9.4°C | 19.0°C | 6.5°C | 36 mm | 80% | 4.3 m/s | 4.7 |
| 1992 | 15.5°C | 11.9°C | 8.3°C | 18.2°C | 5.0°C | 159 mm | 82% | 4.1 m/s | 4.7 |
| 1991 | 15.5°C | 12.5°C | 9.4°C | 19.2°C | 5.2°C | 98 mm | 82% | 4.5 m/s | 5.1 |
| 1990 | 17.2°C | 14.0°C | 10.8°C | 21.5°C | 6.6°C | 89 mm | 83% | 3.9 m/s | 5 |
| 1989 | 17.0°C | 14.2°C | 11.4°C | 20.8°C | 6.1°C | 158 mm | 83% | 5.1 m/s | 4.6 |
| 1988 | 16.2°C | 13.3°C | 10.5°C | 19.4°C | 5.2°C | 103 mm | 83% | 5.4 m/s | 4.7 |
| 1987 | 16.8°C | 13.7°C | 10.5°C | 20.1°C | 6.0°C | 102 mm | 82% | 4.2 m/s | 4.5 |
| 1986 | 16.8°C | 13.6°C | 10.5°C | 19.8°C | 8.2°C | 86 mm | 81% | 4 m/s | 4.8 |
| 1985 | 17.2°C | 13.1°C | 9.0°C | 22.0°C | 5.4°C | 65 mm | 78% | 3.9 m/s | 5.2 |
| 1984 | 16.4°C | 12.7°C | 9.0°C | 21.2°C | 3.4°C | 29 mm | 79% | 4.5 m/s | 5.2 |
| 1983 | 17.2°C | 14.0°C | 10.8°C | 23.0°C | 5.8°C | 166 mm | 83% | 4.2 m/s | — |
| 1982 ❄️ | 15.0°C | 11.8°C | 8.5°C | 18.9°C | 4.9°C | 86 mm | 79% | 4.9 m/s | — |
| 1981 | 17.0°C | 13.3°C | 9.7°C | 19.6°C | 3.9°C | 65 mm | 81% | 4.3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 16.6°C with lows near 10°C (mean 13.3°C), based on 45 years of NASA POWER data.
October averages 97 mm of rainfall in Hamilton, about average for rainfall. The wettest on record was 185 mm in 2025.
The hottest October reached 23°C in 1983. The coldest dipped to 3.1°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1°C. Daytime highs moved from 16.6°C to 17.1°C and overnight lows from 9.4°C to 10.8°C over the same span.
October is one of the cooler months of the year in Hamilton and about average for rainfall, so plan for around 16.6°C daytime highs and 10°C at night.
Not quite — October is the 6th coolest month in Hamilton, averaging 13.3°C.
For October in Hamilton, pack light layers you can adjust through the day, with typical highs of 16.6°C and lows of 10°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 81% — quite humid.
Average wind speed in October is 4.5 m/s. The windiest October on record averaged 5.8 m/s (1998).
The wettest October on record was 2025 with 185 mm. On average, October sees 97 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 Hamilton 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.
