October is one of the warmer months of the year in Harwich, with average highs near 14.8°C and lows around 9.2°C (mean 12°C). It is a relatively wet time of year, averaging 75 mm of rainfall and 86% relative humidity across the period.
October is one of the warmer months of the year in Harwich. Across 45 years of records, the warmest October in Harwich was 2022 — when the month averaged 14.2°C — while the coldest was 1992 at 9°C. Typical October days reach 14.8°C with nights near 9.2°C. The long-term trend is warming, about 0.4°C per decade.
October is a relatively wet time of year in Harwich, averaging 75 mm of rainfall. The wettest October on record was 2020 with 160 mm, while the driest was 1995 at 17 mm.
Relative humidity in Harwich during October averages 86%. The most humid October was 2001 at 90%, and the least humid was 2003 at 82%.
October receives about 1.9 kWh/m²/day of solar energy in Harwich. The sunniest Octobers were 2011, 2018 and 2022 at 2.2 kWh/m²/day, and the cloudiest were 1998 and 2000 at 1.4.
Average wind speed in Harwich during October is 4.5 m/s. The windiest October was 1998 at 6 m/s, while the calmest was 2007 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.5°C | 11.4°C | 12.1°C | 12.3°C | 13.0°C | +1.5°C |
| Avg High | 14.3°C | 14.1°C | 14.8°C | 15.1°C | 15.8°C | +1.5°C |
| Avg Low | 8.7°C | 8.6°C | 9.4°C | 9.6°C | 10.1°C | +1.4°C |
| Avg Rain | 76 mm | 61 mm | 77 mm | 71 mm | 100 mm | +24 mm |
October temperatures in Harwich have risen by about 2°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 0.5°C (1983) to a record high of 23.6°C (2011).
Rainfall in October is a relatively wet time of year, averaging 75 mm, with a wettest year of 160 mm.
A good time to visit Harwich
October is a good time to visit Harwich, with days averaging 14.8°C and nights around 9.2°C (mean 12°C, warmer than Harwich'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 | 15.2°C | 12.4°C | 9.5°C | 19.4°C | 4.0°C | 77 mm | 86% | 4.6 m/s | 1.7 |
| 2024 | 15.5°C | 12.7°C | 10.0°C | 18.8°C | 4.0°C | 61 mm | 88% | 3.8 m/s | 1.9 |
| 2023 | 16.7°C | 13.9°C | 11.1°C | 21.5°C | 5.0°C | 133 mm | 87% | 4 m/s | 2 |
| 2022 🔥 | 17.4°C | 14.2°C | 11.0°C | 19.4°C | 6.9°C | 53 mm | 86% | 4.2 m/s | 2.2 |
| 2021 | 15.8°C | 12.8°C | 9.7°C | 19.4°C | 5.5°C | 116 mm | 87% | 4.7 m/s | 1.9 |
| 2020 🌧️ | 14.3°C | 11.7°C | 9.2°C | 17.8°C | 6.0°C | 160 mm | 87% | 5.1 m/s | 1.6 |
| 2019 | 14.7°C | 11.8°C | 9.0°C | 19.1°C | 5.0°C | 108 mm | 86% | 4.5 m/s | 1.8 |
| 2018 | 15.5°C | 12.4°C | 9.2°C | 21.2°C | 4.0°C | 55 mm | 86% | 4.1 m/s | 2.2 |
| 2017 | 15.9°C | 12.9°C | 10.0°C | 20.4°C | 5.8°C | 34 mm | 86% | 5 m/s | 1.8 |
| 2016 | 14.5°C | 12.0°C | 9.5°C | 17.1°C | 7.4°C | 41 mm | 85% | 3.7 m/s | 2 |
| 2015 | 14.4°C | 11.7°C | 9.1°C | 17.5°C | 5.3°C | 55 mm | 87% | 3.8 m/s | 1.8 |
| 2014 | 16.4°C | 13.5°C | 10.7°C | 20.1°C | 6.3°C | 85 mm | 88% | 4.5 m/s | 1.9 |
| 2013 | 15.6°C | 13.0°C | 10.5°C | 20.3°C | 5.5°C | 102 mm | 88% | 5.1 m/s | 1.7 |
| 2012 | 13.6°C | 11.0°C | 8.4°C | 16.7°C | 3.5°C | 109 mm | 87% | 4.3 m/s | 1.8 |
| 2011 | 16.2°C | 13.3°C | 10.4°C | 23.6°C | 3.5°C | 40 mm | 84% | 4.7 m/s | 2.2 |
| 2010 | 14.1°C | 11.4°C | 8.8°C | 18.4°C | 2.0°C | 85 mm | 88% | 4.6 m/s | 1.8 |
| 2009 | 15.1°C | 12.3°C | 9.5°C | 19.8°C | 5.9°C | 62 mm | 85% | 3.9 m/s | 1.8 |
| 2008 | 13.8°C | 10.6°C | 7.3°C | 18.4°C | 1.1°C | 64 mm | 86% | 4.5 m/s | 2 |
| 2007 | 14.5°C | 11.8°C | 9.1°C | 18.6°C | 5.1°C | 50 mm | 87% | 3.1 m/s | 1.7 |
| 2006 | 16.8°C | 14.0°C | 11.3°C | 19.9°C | 6.2°C | 86 mm | 88% | 4.6 m/s | 1.9 |
| 2005 | 16.7°C | 14.1°C | 11.6°C | 19.5°C | 7.4°C | 87 mm | 88% | 4.2 m/s | 1.9 |
| 2004 | 14.3°C | 11.8°C | 9.2°C | 18.0°C | 6.3°C | 81 mm | 87% | 5 m/s | 1.8 |
| 2003 | 12.9°C | 10.2°C | 7.6°C | 18.1°C | 3.6°C | 46 mm | 82% | 4.7 m/s | 2.1 |
| 2002 | 13.8°C | 11.2°C | 8.7°C | 19.9°C | 4.2°C | 84 mm | 86% | 4.5 m/s | 1.7 |
| 2001 | 16.5°C | 14.0°C | 11.5°C | 19.1°C | 7.4°C | 78 mm | 90% | 5 m/s | 1.9 |
| 2000 | 14.0°C | 11.3°C | 8.6°C | 17.4°C | 7.0°C | 136 mm | 88% | 5.2 m/s | 1.4 |
| 1999 | 14.4°C | 11.7°C | 9.0°C | 18.8°C | 5.7°C | 54 mm | 84% | 4.7 m/s | 2.1 |
| 1998 | 13.7°C | 11.1°C | 8.4°C | 18.3°C | 3.0°C | 100 mm | 84% | 6 m/s | 1.4 |
| 1997 | 14.3°C | 11.4°C | 8.5°C | 22.1°C | 3.1°C | 53 mm | 83% | 4.2 m/s | 2 |
| 1996 | 14.9°C | 12.1°C | 9.2°C | 17.3°C | 4.9°C | 54 mm | 87% | 4.5 m/s | 2 |
| 1995 | 16.7°C | 13.6°C | 10.6°C | 21.2°C | 5.2°C | 17 mm | 87% | 4 m/s | 2 |
| 1994 | 13.8°C | 11.0°C | 8.2°C | 16.7°C | 3.2°C | 70 mm | 87% | 4.2 m/s | 2 |
| 1993 | 12.7°C | 10.2°C | 7.6°C | 17.1°C | 1.9°C | 92 mm | 85% | 4.6 m/s | 1.8 |
| 1992 ❄️ | 11.4°C | 9.0°C | 6.6°C | 17.0°C | 2.0°C | 79 mm | 84% | 4.6 m/s | 1.9 |
| 1991 | 13.8°C | 11.2°C | 8.6°C | 18.5°C | 4.9°C | 31 mm | 85% | 4.2 m/s | 1.8 |
| 1990 | 15.5°C | 12.5°C | 9.5°C | 19.7°C | 5.3°C | 61 mm | 85% | 4.9 m/s | 2 |
| 1989 | 15.7°C | 12.8°C | 9.9°C | 19.8°C | 6.9°C | 55 mm | 84% | 5 m/s | 1.7 |
| 1988 | 14.2°C | 11.7°C | 9.3°C | 17.0°C | 2.4°C | 63 mm | 88% | 4.2 m/s | 1.9 |
| 1987 | 14.0°C | 11.2°C | 8.5°C | 17.9°C | 4.0°C | 121 mm | 87% | 4.5 m/s | 1.8 |
| 1986 | 14.7°C | 11.8°C | 8.8°C | 19.7°C | 4.8°C | 68 mm | 88% | 4.4 m/s | 1.9 |
| 1985 | 14.9°C | 12.2°C | 9.5°C | 21.6°C | 5.6°C | 23 mm | 86% | 3.6 m/s | 1.9 |
| 1984 | 15.0°C | 12.0°C | 8.9°C | 19.8°C | 2.9°C | 63 mm | 87% | 4.8 m/s | 1.7 |
| 1983 | 14.1°C | 11.3°C | 8.4°C | 21.6°C | 0.5°C | 40 mm | 85% | 5.2 m/s | — |
| 1982 | 13.8°C | 11.2°C | 8.6°C | 17.1°C | 4.9°C | 156 mm | 88% | 4 m/s | — |
| 1981 | 12.2°C | 9.3°C | 6.5°C | 16.8°C | 1.7°C | 93 mm | 85% | 5.1 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 14.8°C with lows near 9.2°C (mean 12°C), based on 45 years of NASA POWER data.
October averages 75 mm of rainfall in Harwich, a relatively wet time of year. The wettest on record was 160 mm in 2020.
The hottest October reached 23.6°C in 2011. The coldest dipped to 0.5°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 2°C. Daytime highs moved from 14°C to 16.1°C and overnight lows from 8.4°C to 10.3°C over the same span.
October is one of the warmer months of the year in Harwich and a relatively wet time of year, so plan for around 14.8°C daytime highs and 9.2°C at night.
Not quite — October is the 8th coolest month in Harwich, averaging 12°C.
For October in Harwich, pack light layers you can adjust through the day, with typical highs of 14.8°C and lows of 9.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 86% — quite humid.
Average wind speed in October is 4.5 m/s. The windiest October on record averaged 6 m/s (1998).
The wettest October on record was 2020 with 160 mm. On average, October sees 75 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 Harwich 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.
