Climate averages 1991–2020
New Haven weather
in October.
A mild, wet month: the 6th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in New Haven: daytime highs average 16.5°C and nights cool to about 10.5°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 129 mm of rain on roughly 10 days, which makes October a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 08 min on an average October day.
The nearest other city in this atlas is Bridgeport (26 km away). In October its highs average 16.6°C, about as warm as New Haven, with 113 mm of rain.
Among the 498 cities listed in the United States, New Haven ranks joint 385th of 498 for the warmest October highs and 487th of 498 for the driest October (rainfall, lowest first). The mean October high of those 498 cities is 21.4°C; New Haven is 4.8°C cooler than that mean.
From October to November, average highs fall by 5.8°C to 10.7°C, and monthly rainfall falls from 129 mm to 110 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
New Haven climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.7°C-3.6°C | -3.6°C | 108 | 10.1 | 9.610 h |
| February | 3.6°C-3.3°C | -3.3°C | 97 | 9.2 | 10.611 h |
| March | 7.3°C0.0°C | 0.0°C | 128 | 10.9 | 11.912 h |
| April | 13.1°C5.2°C | 5.2°C | 116 | 11.5 | 13.313 h |
| May | 18.4°C10.6°C | 10.6°C | 98 | 11.6 | 14.514 h |
| June | 23.6°C16.2°C | 16.2°C | 98 | 10.5 | 15.115 h |
| July | 27.0°C19.9°C | 19.9°C | 82 | 9.5 | 14.815 h |
| August | 26.3°C19.6°C | 19.6°C | 102 | 9.6 | 13.814 h |
| September | 22.6°C16.2°C | 16.2°C | 109 | 8.9 | 12.513 h |
| October, selected | 16.5°C10.5°C | 10.5°C | 129 | 10.1 | 11.111 h |
| November | 10.7°C4.9°C | 4.9°C | 110 | 9.5 | 9.910 h |
| December | 5.6°C0.0°C | 0.0°C | 137 | 11.2 | 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
- Bridgeport in OctoberUnited States · 26 kmHigh 16.6°C · Low 10.6°C · 113 mm rain
- Waterbury in OctoberUnited States · 30 kmHigh 16.5°C · Low 8.6°C · 106 mm rain
- New Britain in OctoberUnited States · 41 kmHigh 16.5°C · Low 7.9°C · 103 mm rain
- Danbury in OctoberUnited States · 45 kmHigh 16.3°C · Low 8.6°C · 108 mm rain
- Norwalk in OctoberUnited States · 45 kmHigh 16.7°C · Low 10.5°C · 100 mm rain
- Hartford in OctoberUnited States · 55 kmHigh 16.6°C · Low 7.7°C · 103 mm rain
- Stamford in OctoberUnited States · 58 kmHigh 16.8°C · Low 10.4°C · 100 mm rain
- Greenburgh in OctoberUnited States · 82 kmHigh 16.8°C · Low 9.8°C · 100 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 New Haven) is explained once on the New Haven year overview and on the Sources, method and limits page.