Climate averages 1991–2020
Norwalk weather
in March.
A cold, wet month: the 9th warmest and one of the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a cold month in Norwalk: daytime highs average 7.8°C and nights cool to about -0.1°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 105 mm of rain on roughly 10 days, which makes March a wet month (one of the wettest months of the year). Daylight, from sunrise to sunset, lasts about 11 h 55 min on an average March day.
The nearest other city in this atlas is Stamford (13 km away). In March its highs average 8.0°C, about as warm as Norwalk, with 105 mm of rain.
Among the 498 cities listed in the United States, Norwalk ranks joint 414th of 498 for the warmest March highs and joint 383rd of 498 for the driest March (rainfall, lowest first). The mean March high of those 498 cities is 14.9°C; Norwalk is 7.1°C cooler than that mean.
From March to April, average highs rise by 6.2°C to 14.0°C, and monthly rainfall falls from 105 mm to 93 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
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, selected | 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 | 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
March in nearby cities
- Stamford in MarchUnited States · 13 kmHigh 8.0°C · Low -0.1°C · 105 mm rain
- Bridgeport in MarchUnited States · 20 kmHigh 7.5°C · Low -0.1°C · 116 mm rain
- Danbury in MarchUnited States · 31 kmHigh 7.8°C · Low -1.5°C · 106 mm rain
- Greenburgh in MarchUnited States · 38 kmHigh 8.3°C · Low -0.5°C · 105 mm rain
- New Haven in MarchUnited States · 45 kmHigh 7.3°C · Low 0.0°C · 128 mm rain
- Yonkers in MarchUnited States · 46 kmHigh 8.6°C · Low -0.6°C · 105 mm rain
- The Bronx in MarchUnited States · 49 kmHigh 8.7°C · Low -0.7°C · 107 mm rain
- Waterbury in MarchUnited States · 57 kmHigh 7.8°C · Low -1.4°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.