October is one of the warmer months of the year in Norwalk, with average highs near 17.3°C and lows around 10.8°C (mean 14.1°C). It is about average for rainfall, averaging 107 mm of rainfall and 76% relative humidity across the period.
October is one of the warmer months of the year in Norwalk. Across 45 years of records, the warmest October in Norwalk was 2017 — when the month averaged 17.4°C — while the coldest was 1988 at 11.3°C. Typical October days reach 17.3°C with nights near 10.8°C. The long-term trend is warming, about 0.6°C per decade.
October is about average for rainfall in Norwalk, averaging 107 mm of rainfall. The wettest October on record was 2005 with 407 mm, while the driest was 2024 at 7 mm.
Relative humidity in Norwalk during October averages 76%. The most humid October was 2005 at 83%, and the least humid was 2024 at 70%.
October receives about 3 kWh/m²/day of solar energy in Norwalk. The sunniest October was 2024 at 3.7 kWh/m²/day, and the cloudiest was 2012 at 2.3.
Average wind speed in Norwalk during October is 3 m/s. The windiest October was 2025 at 3.4 m/s, while the calmest was 1994 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.2°C | 13.6°C | 13.8°C | 14.9°C | 15.4°C | +2.2°C |
| Avg High | 16.6°C | 16.9°C | 17.0°C | 17.9°C | 18.6°C | +2°C |
| Avg Low | 9.7°C | 10.3°C | 10.7°C | 11.8°C | 12.2°C | +2.5°C |
| Avg Rain | 96 mm | 102 mm | 119 mm | 108 mm | 110 mm | +14 mm |
October temperatures in Norwalk have risen by about 1.8°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 1.4°C (1988) to a record high of 29.8°C (2019).
Rainfall in October is about average for rainfall, averaging 107 mm, with a wettest year of 407 mm.
A good time to visit Norwalk
October is a good time to visit Norwalk, with days averaging 17.3°C and nights around 10.8°C (mean 14.1°C, warmer than Norwalk's yearly average) and higher 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 | 18.1°C | 15.0°C | 11.8°C | 26.5°C | 6.7°C | 146 mm | 74% | 3.4 m/s | 3.3 |
| 2024 | 19.8°C | 15.8°C | 11.9°C | 26.0°C | 7.9°C | 7 mm | 70% | 2.5 m/s | 3.7 |
| 2023 | 18.5°C | 15.4°C | 12.3°C | 25.5°C | 7.3°C | 77 mm | 82% | 2.5 m/s | 2.9 |
| 2022 | 17.4°C | 14.3°C | 11.3°C | 22.2°C | 6.9°C | 138 mm | 79% | 2.9 m/s | 3 |
| 2021 | 19.8°C | 16.8°C | 13.7°C | 24.0°C | 8.8°C | 153 mm | 82% | 2.9 m/s | 2.8 |
| 2020 | 17.8°C | 14.9°C | 11.9°C | 22.9°C | 1.4°C | 137 mm | 79% | 2.9 m/s | 2.7 |
| 2019 | 18.1°C | 15.2°C | 12.3°C | 29.8°C | 7.3°C | 173 mm | 78% | 3.2 m/s | 2.6 |
| 2018 | 17.0°C | 14.3°C | 11.5°C | 25.1°C | 3.9°C | 125 mm | 81% | 3.2 m/s | 2.6 |
| 2017 🔥 | 20.6°C | 17.4°C | 14.1°C | 25.4°C | 7.9°C | 172 mm | 78% | 3 m/s | 3.2 |
| 2016 | 18.5°C | 15.0°C | 11.5°C | 26.2°C | 5.1°C | 93 mm | 76% | 2.8 m/s | 3 |
| 2015 | 16.9°C | 13.6°C | 10.4°C | 21.6°C | 2.8°C | 92 mm | 74% | 3.2 m/s | 3.2 |
| 2014 | 17.8°C | 15.0°C | 12.1°C | 23.1°C | 5.7°C | 99 mm | 77% | 3.2 m/s | 2.7 |
| 2013 | 18.5°C | 15.2°C | 11.9°C | 25.8°C | 6.0°C | 17 mm | 74% | 2.8 m/s | 3 |
| 2012 | 17.8°C | 15.0°C | 12.2°C | 24.9°C | 4.8°C | 79 mm | 80% | 3 m/s | 2.3 |
| 2011 | 16.9°C | 13.9°C | 10.9°C | 24.9°C | 2.8°C | 125 mm | 79% | 3 m/s | 3 |
| 2010 | 17.1°C | 14.0°C | 10.8°C | 22.4°C | 5.7°C | 105 mm | 77% | 3.3 m/s | 2.9 |
| 2009 | 15.8°C | 13.0°C | 10.1°C | 21.9°C | 4.8°C | 144 mm | 78% | 3.2 m/s | 2.6 |
| 2008 | 16.4°C | 13.2°C | 9.9°C | 22.3°C | 3.2°C | 77 mm | 76% | 3 m/s | 3.3 |
| 2007 | 20.3°C | 17.1°C | 13.8°C | 28.2°C | 5.6°C | 96 mm | 80% | 2.8 m/s | 2.8 |
| 2006 | 16.6°C | 13.3°C | 10.1°C | 22.9°C | 4.2°C | 156 mm | 77% | 3.3 m/s | 3.1 |
| 2005 🌧️ | 17.0°C | 14.3°C | 11.6°C | 24.2°C | 4.1°C | 407 mm | 83% | 3.2 m/s | 2.5 |
| 2004 | 16.2°C | 13.4°C | 10.5°C | 21.5°C | 6.9°C | 44 mm | 79% | 2.9 m/s | 3 |
| 2003 | 16.2°C | 12.9°C | 9.7°C | 23.7°C | 3.9°C | 111 mm | 76% | 3.1 m/s | 2.9 |
| 2002 | 16.1°C | 13.2°C | 10.3°C | 25.8°C | 4.0°C | 114 mm | 75% | 3.1 m/s | 2.8 |
| 2001 | 17.9°C | 14.3°C | 10.7°C | 23.9°C | 4.5°C | 24 mm | 72% | 3.1 m/s | 3.5 |
| 2000 | 17.1°C | 13.5°C | 10.0°C | 24.3°C | 2.6°C | 15 mm | 74% | 2.8 m/s | 3 |
| 1999 | 16.5°C | 13.2°C | 9.8°C | 21.5°C | 5.3°C | 84 mm | 78% | 2.9 m/s | 3.3 |
| 1998 | 16.9°C | 13.6°C | 10.3°C | 23.8°C | 6.0°C | 79 mm | 74% | 2.9 m/s | 2.9 |
| 1997 | 17.1°C | 13.5°C | 9.9°C | 26.2°C | 4.0°C | 59 mm | 70% | 2.7 m/s | 3.2 |
| 1996 | 16.2°C | 12.9°C | 9.6°C | 21.7°C | 5.8°C | 185 mm | 78% | 3.1 m/s | 3.2 |
| 1995 | 18.9°C | 15.4°C | 11.9°C | 24.2°C | 6.1°C | 174 mm | 79% | 3 m/s | 3.1 |
| 1994 | 16.7°C | 13.2°C | 9.7°C | 20.6°C | 6.4°C | 30 mm | 74% | 2.4 m/s | 3.4 |
| 1993 | 15.6°C | 12.6°C | 9.7°C | 21.8°C | 5.3°C | 112 mm | 76% | 3.1 m/s | 3.1 |
| 1992 | 15.7°C | 12.3°C | 8.9°C | 22.5°C | 3.6°C | 45 mm | 72% | 2.9 m/s | 2.9 |
| 1991 | 17.4°C | 14.1°C | 10.8°C | 23.2°C | 3.7°C | 68 mm | 79% | 3 m/s | 3 |
| 1990 | 18.3°C | 15.3°C | 12.3°C | 23.6°C | 3.3°C | 184 mm | 77% | 3.1 m/s | 3.2 |
| 1989 | 17.0°C | 13.6°C | 10.2°C | 21.2°C | 5.9°C | 210 mm | 81% | 2.8 m/s | 3 |
| 1988 ❄️ | 14.5°C | 11.3°C | 8.2°C | 22.4°C | 1.4°C | 86 mm | 73% | 3.3 m/s | 2.9 |
| 1987 | 15.3°C | 11.6°C | 7.9°C | 20.9°C | 4.1°C | 81 mm | 76% | 3 m/s | 3.1 |
| 1986 | 16.9°C | 13.5°C | 10.1°C | 25.1°C | 4.6°C | 62 mm | 73% | 2.7 m/s | 3.2 |
| 1985 | 17.7°C | 14.3°C | 11.0°C | 22.2°C | 3.1°C | 43 mm | 72% | 2.9 m/s | 3 |
| 1984 | 18.6°C | 15.2°C | 11.7°C | 21.8°C | 5.5°C | 74 mm | 77% | 2.6 m/s | 3.3 |
| 1983 | 16.7°C | 13.5°C | 10.3°C | 23.3°C | 3.5°C | 139 mm | 76% | 2.8 m/s | — |
| 1982 | 17.4°C | 13.7°C | 10.0°C | 24.3°C | 4.1°C | 44 mm | 70% | 2.8 m/s | — |
| 1981 | 15.3°C | 11.8°C | 8.3°C | 20.3°C | 4.4°C | 121 mm | 74% | 3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 17.3°C with lows near 10.8°C (mean 14.1°C), based on 45 years of NASA POWER data.
October averages 107 mm of rainfall in Norwalk, about average for rainfall. The wettest on record was 407 mm in 2005.
The hottest October reached 29.8°C in 2019. The coldest dipped to 1.4°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.8°C. Daytime highs moved from 17.1°C to 18.7°C and overnight lows from 10.3°C to 12.2°C over the same span.
October is one of the warmer months of the year in Norwalk and about average for rainfall, so plan for around 17.3°C daytime highs and 10.8°C at night.
Not quite — October is the 8th coolest month in Norwalk, averaging 14.1°C.
For October in Norwalk, pack light layers you can adjust through the day, with typical highs of 17.3°C and lows of 10.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 76% — quite humid.
Average wind speed in October is 3 m/s. The windiest October on record averaged 3.4 m/s (2025).
The wettest October on record was 2005 with 407 mm. On average, October sees 107 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 Norwalk 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.
