Climate averages 1991–2020
Norwalk weather
in October.
A mild, wet month: the 6th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Norwalk: daytime highs average 16.7°C and nights cool to about 10.5°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 100 mm of rain on roughly 9 days, which makes October a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 09 min on an average October day.
The nearest other city in this atlas is Stamford (13 km away). In October its highs average 16.8°C, about as warm as Norwalk, with 100 mm of rain.
Among the 498 cities listed in the United States, Norwalk ranks joint 373rd of 498 for the warmest October highs and joint 409th of 498 for the driest October (rainfall, lowest first). The mean October high of those 498 cities is 21.4°C; Norwalk is 4.7°C cooler than that mean.
From October to November, average highs fall by 6.0°C to 10.7°C, and monthly rainfall falls from 100 mm to 82 mm.
The annual picture
October in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Norwalk climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.6°C-4.1°C | -4.1°C | 84 | 9.0 | 9.610 h |
| February | 3.8°C-3.8°C | -3.8°C | 78 | 8.7 | 10.611 h |
| March | 7.8°C-0.1°C | -0.1°C | 105 | 10.3 | 11.912 h |
| April | 14.0°C5.5°C | 5.5°C | 93 | 10.5 | 13.313 h |
| May | 19.5°C11.2°C | 11.2°C | 85 | 10.9 | 14.514 h |
| June | 24.8°C16.9°C | 16.9°C | 94 | 10.8 | 15.115 h |
| July | 28.1°C20.5°C | 20.5°C | 92 | 10.7 | 14.815 h |
| August | 27.0°C19.9°C | 19.9°C | 103 | 10.5 | 13.814 h |
| September | 23.1°C16.4°C | 16.4°C | 94 | 9.0 | 12.513 h |
| October, selected | 16.7°C10.5°C | 10.5°C | 100 | 8.5 | 11.111 h |
| November | 10.7°C4.8°C | 4.8°C | 82 | 8.5 | 9.910 h |
| December | 5.5°C-0.2°C | -0.2°C | 105 | 9.8 | 9.39 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Stamford in OctoberUnited States · 13 kmHigh 16.8°C · Low 10.4°C · 100 mm rain
- Bridgeport in OctoberUnited States · 20 kmHigh 16.6°C · Low 10.6°C · 113 mm rain
- Danbury in OctoberUnited States · 31 kmHigh 16.3°C · Low 8.6°C · 108 mm rain
- Greenburgh in OctoberUnited States · 38 kmHigh 16.8°C · Low 9.8°C · 100 mm rain
- New Haven in OctoberUnited States · 45 kmHigh 16.5°C · Low 10.5°C · 129 mm rain
- Yonkers in OctoberUnited States · 46 kmHigh 17.2°C · Low 9.6°C · 101 mm rain
- The Bronx in OctoberUnited States · 49 kmHigh 17.4°C · Low 9.4°C · 101 mm rain
- Waterbury in OctoberUnited States · 57 kmHigh 16.5°C · Low 8.6°C · 106 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Norwalk) is explained once on the Norwalk year overview and on the Sources, method and limits page.
Stamford lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.