October is one of the warmer months of the year in Watertown, with average highs near 13.5°C and lows around 4.6°C (mean 9.1°C). It is a relatively wet time of year, averaging 110 mm of rainfall and 81% relative humidity across the period.
October is one of the warmer months of the year in Watertown. Across 45 years of records, the warmest October in Watertown was 2017 — when the month averaged 12.9°C — while the coldest was 1981 at 5.8°C. Typical October days reach 13.5°C with nights near 4.6°C. The long-term trend is warming, about 0.7°C per decade.
October is a relatively wet time of year in Watertown, averaging 110 mm of rainfall. The wettest October on record was 1995 with 204 mm, while the driest was 1994 at 38 mm.
Relative humidity in Watertown during October averages 81%. The most humid October was 2005 at 86%, and the least humid was 2015 at 75%.
October receives about 2.5 kWh/m²/day of solar energy in Watertown. The sunniest October was 2025 at 3 kWh/m²/day, and the cloudiest were 2005, 2006 and 2018 at 2.1.
Average wind speed in Watertown during October is 0.4 m/s. The windiest Octobers were 2020, 2022 and 2024, among others at 0.4 m/s, while the calmest were 2021, 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 | 7.9°C | 8.5°C | 8.9°C | 10.0°C | 10.7°C | +2.8°C |
| Avg High | 12.5°C | 13.1°C | 13.1°C | 14.2°C | 15.3°C | +2.8°C |
| Avg Low | 3.4°C | 4.0°C | 4.6°C | 5.7°C | 6.1°C | +2.7°C |
| Avg Rain | 97 mm | 101 mm | 126 mm | 126 mm | 90 mm | -7 mm |
October temperatures in Watertown have risen by about 2.6°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -6.5°C (2008) to a record high of 28.5°C (2023).
Rainfall in October is a relatively wet time of year, averaging 110 mm, with a wettest year of 204 mm.
A good time to visit Watertown
October is a good time to visit Watertown, with days averaging 13.5°C and nights around 4.6°C (mean 9.1°C, warmer than Watertown's yearly average) and higher 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 | 15.4°C | 10.3°C | 5.2°C | 27.2°C | -2.2°C | 109 mm | 77% | 0.3 m/s | 3 |
| 2024 | 15.2°C | 10.4°C | 5.6°C | 22.7°C | -1.6°C | 54 mm | 79% | 0.4 m/s | 2.9 |
| 2023 | 15.5°C | 11.5°C | 7.5°C | 28.5°C | -3.0°C | 105 mm | 83% | 0.3 m/s | 2.2 |
| 2022 | 15.3°C | 10.0°C | 4.7°C | 21.9°C | -0.9°C | 40 mm | 75% | 0.4 m/s | 2.9 |
| 2021 | 17.0°C | 12.8°C | 8.6°C | 23.8°C | 1.2°C | 131 mm | 83% | 0.3 m/s | 2.3 |
| 2020 | 13.2°C | 9.1°C | 4.9°C | 23.2°C | -4.0°C | 99 mm | 79% | 0.4 m/s | 2.3 |
| 2019 | 15.1°C | 10.5°C | 5.9°C | 25.1°C | 0.0°C | 181 mm | 83% | 0.3 m/s | 2.4 |
| 2018 | 12.2°C | 8.2°C | 4.1°C | 26.5°C | -3.8°C | 105 mm | 82% | 0.3 m/s | 2.1 |
| 2017 🔥 | 17.3°C | 12.9°C | 8.5°C | 23.8°C | 0.4°C | 188 mm | 78% | 0.4 m/s | 2.7 |
| 2016 | 14.4°C | 9.9°C | 5.5°C | 24.9°C | -2.4°C | 155 mm | 79% | 0.3 m/s | 2.4 |
| 2015 | 12.8°C | 8.2°C | 3.7°C | 21.1°C | -4.5°C | 80 mm | 75% | 0.4 m/s | 2.6 |
| 2014 | 14.6°C | 10.6°C | 6.6°C | 24.2°C | 1.4°C | 111 mm | 83% | 0.3 m/s | 2.2 |
| 2013 | 14.6°C | 10.3°C | 5.9°C | 22.1°C | -4.7°C | 122 mm | 81% | 0.4 m/s | 2.6 |
| 2012 | 14.7°C | 10.7°C | 6.7°C | 22.4°C | -1.5°C | 76 mm | 82% | 0.4 m/s | 2.2 |
| 2011 | 13.8°C | 9.6°C | 5.4°C | 23.3°C | -3.7°C | 103 mm | 82% | 0.4 m/s | 2.3 |
| 2010 | 12.7°C | 8.6°C | 4.5°C | 20.0°C | -2.6°C | 138 mm | 81% | 0.4 m/s | 2.6 |
| 2009 | 11.5°C | 7.6°C | 3.6°C | 18.8°C | -3.1°C | 117 mm | 83% | 0.3 m/s | 2.2 |
| 2008 | 12.1°C | 7.6°C | 3.1°C | 21.0°C | -6.5°C | 156 mm | 83% | 0.4 m/s | 2.7 |
| 2007 | 17.3°C | 12.4°C | 7.5°C | 26.3°C | -2.7°C | 169 mm | 81% | 0.3 m/s | 2.6 |
| 2006 | 12.0°C | 7.9°C | 3.8°C | 20.6°C | -2.8°C | 187 mm | 85% | 0.4 m/s | 2.1 |
| 2005 | 13.2°C | 9.5°C | 5.9°C | 24.6°C | -1.8°C | 159 mm | 86% | 0.3 m/s | 2.1 |
| 2004 | 13.8°C | 9.2°C | 4.5°C | 22.3°C | -1.7°C | 70 mm | 82% | 0.3 m/s | 2.6 |
| 2003 | 12.0°C | 7.9°C | 3.9°C | 24.2°C | -2.0°C | 157 mm | 82% | 0.4 m/s | 2.4 |
| 2002 | 12.0°C | 7.7°C | 3.3°C | 24.8°C | -4.6°C | 102 mm | 78% | 0.3 m/s | 2.6 |
| 2001 | 14.1°C | 9.8°C | 5.5°C | 23.6°C | -2.6°C | 92 mm | 78% | 0.4 m/s | 2.5 |
| 2000 | 13.3°C | 9.0°C | 4.7°C | 21.0°C | -3.5°C | 52 mm | 82% | 0.3 m/s | 2.4 |
| 1999 | 12.9°C | 8.0°C | 3.1°C | 20.1°C | -4.0°C | 99 mm | 76% | 0.4 m/s | 2.5 |
| 1998 | 13.8°C | 9.6°C | 5.3°C | 22.2°C | -0.4°C | 71 mm | 80% | 0.4 m/s | 2.8 |
| 1997 | 12.8°C | 8.0°C | 3.2°C | 24.0°C | -4.4°C | 62 mm | 79% | 0.4 m/s | 2.9 |
| 1996 | 12.8°C | 8.0°C | 3.3°C | 21.8°C | -4.1°C | 80 mm | 81% | 0.3 m/s | 2.5 |
| 1995 🌧️ | 14.7°C | 10.4°C | 6.1°C | 22.3°C | -2.4°C | 204 mm | 81% | 0.4 m/s | 2.3 |
| 1994 | 13.4°C | 8.7°C | 4.0°C | 21.8°C | -2.6°C | 38 mm | 78% | 0.4 m/s | 2.8 |
| 1993 | 11.8°C | 7.4°C | 3.0°C | 20.9°C | -3.2°C | 97 mm | 79% | 0.4 m/s | 2.4 |
| 1992 | 10.6°C | 6.2°C | 1.8°C | 19.9°C | -4.7°C | 100 mm | 83% | 0.3 m/s | 2.3 |
| 1991 | 14.5°C | 9.5°C | 4.6°C | 23.6°C | -4.4°C | 92 mm | 80% | 0.3 m/s | 2.4 |
| 1990 | 14.0°C | 9.5°C | 5.1°C | 22.7°C | -5.2°C | 164 mm | 83% | 0.3 m/s | 2.3 |
| 1989 | 14.0°C | 9.1°C | 4.3°C | 22.5°C | -2.4°C | 106 mm | 83% | 0.4 m/s | 2.5 |
| 1988 | 9.5°C | 5.9°C | 2.3°C | 23.2°C | -4.9°C | 152 mm | 82% | 0.4 m/s | 2.2 |
| 1987 | 11.6°C | 6.9°C | 2.3°C | 18.4°C | -3.3°C | 90 mm | 80% | 0.4 m/s | 2.7 |
| 1986 | 12.1°C | 7.4°C | 2.8°C | 19.0°C | -4.7°C | 93 mm | 83% | 0.3 m/s | 2.5 |
| 1985 | 13.1°C | 8.6°C | 4.1°C | 18.4°C | -5.3°C | 97 mm | 78% | 0.4 m/s | 2.5 |
| 1984 | 15.3°C | 10.3°C | 5.2°C | 20.5°C | -2.8°C | 43 mm | 80% | 0.3 m/s | 2.7 |
| 1983 | 13.4°C | 8.7°C | 4.0°C | 24.3°C | -4.1°C | 100 mm | 78% | 0.4 m/s | — |
| 1982 | 13.7°C | 8.7°C | 3.7°C | 20.5°C | -2.5°C | 58 mm | 79% | 0.4 m/s | — |
| 1981 ❄️ | 10.1°C | 5.8°C | 1.5°C | 17.1°C | -3.9°C | 136 mm | 84% | 0.4 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 13.5°C with lows near 4.6°C (mean 9.1°C), based on 45 years of NASA POWER data.
October averages 110 mm of rainfall in Watertown, a relatively wet time of year. The wettest on record was 204 mm in 1995.
The hottest October reached 28.5°C in 2023. The coldest dipped to -6.5°C in 2008.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 2.6°C. Daytime highs moved from 13.1°C to 15.7°C and overnight lows from 3.7°C to 6.3°C over the same span.
October is one of the warmer months of the year in Watertown and a relatively wet time of year, so plan for around 13.5°C daytime highs and 4.6°C at night.
Not quite — October is the 7th coolest month in Watertown, averaging 9.1°C.
For October in Watertown, pack warm layers and a jacket for chilly mornings, with typical highs of 13.5°C and lows of 4.6°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 0.4 m/s (1981).
The wettest October on record was 1995 with 204 mm. On average, October sees 110 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 Watertown 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.
