Climate averages 1991–2020
Norwalk weather
in July.
A hot, wet month: the warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Norwalk: daytime highs average 28.1°C and nights cool to about 20.5°C. By daytime temperature it is the warmest month of the year.
Expect about 92 mm of rain on roughly 11 days, which makes July a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 49 min on an average July day.
The nearest other city in this atlas is Stamford (13 km away). In July its highs average 28.3°C, about as warm as Norwalk, with 92 mm of rain.
Among the 498 cities listed in the United States, Norwalk ranks joint 354th of 498 for the warmest July highs and joint 330th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Norwalk is 2.2°C cooler than that mean.
From July to August, average highs fall by 1.1°C to 27.0°C, and monthly rainfall rises from 92 mm to 103 mm.
The annual picture
July 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, selected | 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
July in nearby cities
- Stamford in JulyUnited States · 13 kmHigh 28.3°C · Low 20.5°C · 92 mm rain
- Bridgeport in JulyUnited States · 20 kmHigh 27.6°C · Low 20.1°C · 87 mm rain
- Danbury in JulyUnited States · 31 kmHigh 28.1°C · Low 18.9°C · 108 mm rain
- Greenburgh in JulyUnited States · 38 kmHigh 28.4°C · Low 20.2°C · 97 mm rain
- New Haven in JulyUnited States · 45 kmHigh 27.0°C · Low 19.9°C · 82 mm rain
- Yonkers in JulyUnited States · 46 kmHigh 28.7°C · Low 20.1°C · 106 mm rain
- The Bronx in JulyUnited States · 49 kmHigh 28.7°C · Low 20.0°C · 94 mm rain
- Waterbury in JulyUnited States · 57 kmHigh 28.2°C · Low 18.9°C · 90 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.