Climate averages 1991–2020
New Haven weather
in March.
A cold, wet month: the 9th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a cold month in New Haven: daytime highs average 7.3°C and nights cool to about 0.0°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 128 mm of rain on roughly 11 days, which makes March a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 55 min on an average March day.
The nearest other city in this atlas is Bridgeport (26 km away). In March its highs average 7.5°C, about as warm as New Haven, with 116 mm of rain.
Among the 498 cities listed in the United States, New Haven ranks joint 427th of 498 for the warmest March highs and joint 470th of 498 for the driest March (rainfall, lowest first). The mean March high of those 498 cities is 14.9°C; New Haven is 7.7°C cooler than that mean.
From March to April, average highs rise by 5.8°C to 13.1°C, and monthly rainfall falls from 128 mm to 116 mm.
The annual picture
March 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, selected | 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 | 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
March in nearby cities
- Bridgeport in MarchUnited States · 26 kmHigh 7.5°C · Low -0.1°C · 116 mm rain
- Waterbury in MarchUnited States · 30 kmHigh 7.8°C · Low -1.4°C · 106 mm rain
- New Britain in MarchUnited States · 41 kmHigh 7.9°C · Low -1.9°C · 103 mm rain
- Danbury in MarchUnited States · 45 kmHigh 7.8°C · Low -1.5°C · 106 mm rain
- Norwalk in MarchUnited States · 45 kmHigh 7.8°C · Low -0.1°C · 105 mm rain
- Hartford in MarchUnited States · 55 kmHigh 8.0°C · Low -2.1°C · 103 mm rain
- Stamford in MarchUnited States · 58 kmHigh 8.0°C · Low -0.1°C · 105 mm rain
- Greenburgh in MarchUnited States · 82 kmHigh 8.3°C · Low -0.5°C · 105 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.