Climate averages 1991–2020
East Hampton weather
in September.
A warm, wet month: the 4th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in East Hampton: daytime highs average 25.8°C and nights cool to about 19.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 110 mm of rain on roughly 10 days, which makes September a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 27 min on an average September day.
The nearest other city in this atlas is Newport News (11 km away). In September its highs average 26.2°C, about as warm as East Hampton, with 115 mm of rain.
Among the 498 cities listed in the United States, East Hampton ranks joint 290th of 498 for the warmest September highs and joint 425th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; East Hampton is 1.1°C cooler than that mean.
From September to October, average highs fall by 5.1°C to 20.7°C, and monthly rainfall falls from 110 mm to 98 mm.
The annual picture
September 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
East Hampton climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.6°C1.2°C | 1.2°C | 91 | 9.6 | 9.910 h |
| February | 10.0°C1.9°C | 1.9°C | 83 | 9.1 | 10.811 h |
| March | 13.5°C5.0°C | 5.0°C | 101 | 10.0 | 11.912 h |
| April | 19.0°C10.2°C | 10.2°C | 82 | 9.5 | 13.113 h |
| May | 23.4°C15.3°C | 15.3°C | 90 | 10.0 | 14.114 h |
| June | 27.7°C20.2°C | 20.2°C | 82 | 10.6 | 14.715 h |
| July | 30.0°C22.8°C | 22.8°C | 106 | 13.5 | 14.414 h |
| August | 29.0°C22.2°C | 22.2°C | 100 | 11.3 | 13.614 h |
| September, selected | 25.8°C19.6°C | 19.6°C | 110 | 10.2 | 12.512 h |
| October | 20.7°C13.7°C | 13.7°C | 98 | 7.7 | 11.311 h |
| November | 15.0°C7.8°C | 7.8°C | 89 | 8.6 | 10.210 h |
| December | 10.9°C3.7°C | 3.7°C | 94 | 9.4 | 9.710 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
September in nearby cities
- Newport News in SeptemberUnited States · 11 kmHigh 26.2°C · Low 19.1°C · 115 mm rain
- Norfolk in SeptemberUnited States · 22 kmHigh 26.1°C · Low 19.1°C · 120 mm rain
- Portsmouth Heights in SeptemberUnited States · 24 kmHigh 26.4°C · Low 18.8°C · 120 mm rain
- Virginia Beach in SeptemberUnited States · 38 kmHigh 25.0°C · Low 20.6°C · 114 mm rain
- Suffolk in SeptemberUnited States · 41 kmHigh 26.6°C · Low 18.8°C · 123 mm rain
- Richmond in SeptemberUnited States · 115 kmHigh 26.3°C · Low 17.3°C · 112 mm rain
- Greenville in SeptemberUnited States · 184 kmHigh 27.0°C · Low 19.0°C · 132 mm rain
- Alexandria, United States in SeptemberUnited States · 206 kmHigh 25.7°C · Low 17.2°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 East Hampton) is explained once on the East Hampton year overview and on the Sources, method and limits page.