October is one of the cooler months of the year in Blenheim, with average highs near 14.4°C and lows around 5.8°C (mean 10.1°C). It is about average for rainfall, averaging 72 mm of rainfall and 83% relative humidity across the period.
October is one of the cooler months of the year in Blenheim. Across 45 years of records, the warmest October in Blenheim was 2001 — when the month averaged 11.6°C — while the coldest were 1982 and 2009 at 8.5°C. Typical October days reach 14.4°C with nights near 5.8°C. The long-term October temperature trend is broadly flat.
October is about average for rainfall in Blenheim, averaging 72 mm of rainfall. The wettest October on record was 1998 with 128 mm, while the driest was 2002 at 28 mm.
Relative humidity in Blenheim during October averages 83%. The most humid October was 1992 at 87%, and the least humid was 2002 at 75%.
October receives about 5 kWh/m²/day of solar energy in Blenheim. The sunniest October was 2010 at 5.7 kWh/m²/day, and the cloudiest was 1998 at 4.3.
Average wind speed in Blenheim during October is 2.5 m/s. The windiest October was 1988 at 3.5 m/s, while the calmest was 1986 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.1°C | 10.1°C | 9.9°C | 10.2°C | 10.4°C | +0.3°C |
| Avg High | 14.3°C | 14.3°C | 14.4°C | 14.6°C | 14.5°C | +0.2°C |
| Avg Low | 5.9°C | 5.8°C | 5.4°C | 5.8°C | 6.3°C | +0.4°C |
| Avg Rain | 80 mm | 68 mm | 73 mm | 69 mm | 71 mm | -10 mm |
October temperatures in Blenheim have risen by about 0.5°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -0.6°C (2007) to a record high of 22.7°C (2012).
Rainfall in October is about average for rainfall, averaging 72 mm, with a wettest year of 128 mm.
A good time to visit Blenheim
October is a good time to visit Blenheim, with days averaging 14.4°C and nights around 5.8°C (mean 10.1°C, cooler than Blenheim's yearly average) and moderate 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 | 14.6°C | 10.4°C | 6.2°C | 18.5°C | 2.8°C | 77 mm | 83% | 3.2 m/s | 5.1 |
| 2024 | 14.5°C | 10.6°C | 6.7°C | 19.1°C | 1.8°C | 118 mm | 85% | 2.4 m/s | 4.7 |
| 2023 | 15.1°C | 10.5°C | 5.8°C | 18.3°C | 1.0°C | 48 mm | 82% | 2.5 m/s | 5.6 |
| 2022 | 13.5°C | 9.5°C | 5.5°C | 18.2°C | -0.5°C | 38 mm | 84% | 2.5 m/s | 5.1 |
| 2021 | 14.5°C | 10.7°C | 7.0°C | 18.0°C | 1.9°C | 79 mm | 86% | 2.2 m/s | 5 |
| 2020 | 14.8°C | 10.7°C | 6.6°C | 18.7°C | 0.9°C | 64 mm | 84% | 2.5 m/s | 4.7 |
| 2019 | 13.9°C | 9.7°C | 5.5°C | 19.3°C | 1.5°C | 80 mm | 84% | 2.5 m/s | 5.2 |
| 2018 | 15.0°C | 10.7°C | 6.3°C | 19.1°C | 0.5°C | 65 mm | 84% | 2.1 m/s | 5.3 |
| 2017 | 15.3°C | 11.0°C | 6.6°C | 20.2°C | 3.2°C | 84 mm | 85% | 2 m/s | 5.1 |
| 2016 | 14.4°C | 10.2°C | 6.1°C | 18.3°C | 1.6°C | 118 mm | 84% | 2.4 m/s | 5.3 |
| 2015 | 15.3°C | 10.5°C | 5.7°C | 19.1°C | 2.8°C | 34 mm | 81% | 2.4 m/s | 5.5 |
| 2014 | 15.0°C | 10.1°C | 5.2°C | 19.7°C | 0.5°C | 34 mm | 80% | 2.5 m/s | 5.4 |
| 2013 | 14.7°C | 10.4°C | 6.1°C | 19.6°C | 0.9°C | 89 mm | 84% | 2.8 m/s | 4.7 |
| 2012 | 14.2°C | 9.7°C | 5.1°C | 22.7°C | 1.0°C | 45 mm | 80% | 2.8 m/s | 5.1 |
| 2011 | 14.0°C | 10.0°C | 6.1°C | 19.4°C | 0.4°C | 108 mm | 85% | 2.3 m/s | 4.4 |
| 2010 | 14.0°C | 9.5°C | 5.0°C | 17.3°C | 1.4°C | 34 mm | 82% | 2.5 m/s | 5.7 |
| 2009 | 13.1°C | 8.5°C | 4.0°C | 16.8°C | 1.0°C | 117 mm | 81% | 2.4 m/s | 5 |
| 2008 | 14.8°C | 10.0°C | 5.3°C | 19.1°C | 1.1°C | 46 mm | 82% | 2.3 m/s | 5.1 |
| 2007 | 13.7°C | 9.2°C | 4.6°C | 18.9°C | -0.6°C | 96 mm | 79% | 3.3 m/s | 5.3 |
| 2006 | 13.8°C | 9.5°C | 5.1°C | 19.3°C | 0.9°C | 92 mm | 81% | 3.1 m/s | 5 |
| 2005 | 14.3°C | 10.2°C | 6.0°C | 18.2°C | 1.4°C | 56 mm | 81% | 2.2 m/s | 5.4 |
| 2004 | 14.2°C | 10.0°C | 5.8°C | 18.9°C | 0.4°C | 70 mm | 84% | 2.4 m/s | 4.6 |
| 2003 | 14.0°C | 9.8°C | 5.6°C | 19.8°C | 0.8°C | 81 mm | 83% | 2.3 m/s | 5 |
| 2002 | 14.5°C | 9.2°C | 4.0°C | 19.5°C | 0.7°C | 28 mm | 75% | 2.5 m/s | 5.5 |
| 2001 🔥 | 15.9°C | 11.6°C | 7.3°C | 21.8°C | 2.7°C | 112 mm | 82% | 2.4 m/s | 4.5 |
| 2000 | 15.2°C | 10.5°C | 5.9°C | 19.5°C | 1.0°C | 32 mm | 79% | 2.9 m/s | 4.9 |
| 1999 | 15.6°C | 11.4°C | 7.1°C | 21.0°C | 1.8°C | 45 mm | 83% | 2.5 m/s | 4.9 |
| 1998 🌧️ | 14.2°C | 10.4°C | 6.7°C | 16.9°C | 0.9°C | 128 mm | 84% | 3.3 m/s | 4.3 |
| 1997 | 15.4°C | 10.3°C | 5.2°C | 21.4°C | 0.6°C | 34 mm | 79% | 2.2 m/s | 5.5 |
| 1996 | 14.7°C | 10.4°C | 6.2°C | 18.2°C | 3.2°C | 55 mm | 83% | 2.5 m/s | 4.9 |
| 1995 | 14.0°C | 9.9°C | 5.9°C | 17.8°C | -0.2°C | 83 mm | 85% | 2.2 m/s | 5 |
| 1994 | 13.8°C | 9.1°C | 4.4°C | 19.2°C | 0.8°C | 70 mm | 83% | 2.1 m/s | 5.5 |
| 1993 | 14.8°C | 10.4°C | 6.1°C | 17.4°C | 1.2°C | 47 mm | 82% | 2.6 m/s | 5.2 |
| 1992 | 12.2°C | 8.8°C | 5.4°C | 18.6°C | 0.6°C | 113 mm | 87% | 2.6 m/s | 4.4 |
| 1991 | 13.9°C | 9.4°C | 4.8°C | 17.2°C | 1.0°C | 35 mm | 81% | 2.5 m/s | 5.4 |
| 1990 | 14.7°C | 10.4°C | 6.1°C | 18.5°C | 0.9°C | 69 mm | 83% | 2.2 m/s | 5.5 |
| 1989 | 14.6°C | 10.9°C | 7.1°C | 18.2°C | 1.4°C | 116 mm | 85% | 2.6 m/s | 4.8 |
| 1988 | 14.2°C | 10.2°C | 6.1°C | 17.4°C | 2.1°C | 72 mm | 83% | 3.5 m/s | 4.5 |
| 1987 | 14.4°C | 10.4°C | 6.4°C | 18.9°C | 1.2°C | 86 mm | 84% | 2.3 m/s | 4.8 |
| 1986 | 14.5°C | 10.5°C | 6.4°C | 18.5°C | 3.1°C | 122 mm | 86% | 1.9 m/s | 4.5 |
| 1985 | 14.1°C | 9.4°C | 4.7°C | 18.7°C | 1.6°C | 58 mm | 81% | 2.2 m/s | 5.4 |
| 1984 | 14.9°C | 10.2°C | 5.5°C | 20.2°C | 1.2°C | 34 mm | 79% | 2.7 m/s | 5.2 |
| 1983 | 14.1°C | 10.4°C | 6.7°C | 19.7°C | 2.0°C | 91 mm | 84% | 2.5 m/s | — |
| 1982 ❄️ | 13.1°C | 8.5°C | 3.9°C | 18.3°C | 0.6°C | 39 mm | 79% | 2.5 m/s | — |
| 1981 | 14.9°C | 10.4°C | 5.9°C | 20.1°C | 1.6°C | 105 mm | 83% | 2.8 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 14.4°C with lows near 5.8°C (mean 10.1°C), based on 45 years of NASA POWER data.
October averages 72 mm of rainfall in Blenheim, about average for rainfall. The wettest on record was 128 mm in 1998.
The hottest October reached 22.7°C in 2012. The coldest dipped to -0.6°C in 2007.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 0.5°C. Daytime highs moved from 14.2°C to 14.4°C and overnight lows from 5.3°C to 6.2°C over the same span.
October is one of the cooler months of the year in Blenheim and about average for rainfall, so plan for around 14.4°C daytime highs and 5.8°C at night.
Not quite — October is the 6th coolest month in Blenheim, averaging 10.1°C.
For October in Blenheim, pack warm layers and a jacket for chilly mornings, with typical highs of 14.4°C and lows of 5.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 83% — quite humid.
Average wind speed in October is 2.5 m/s. The windiest October on record averaged 3.5 m/s (1988).
The wettest October on record was 1998 with 128 mm. On average, October sees 72 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 Blenheim 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.
