Climate averages 1991–2020
Suffolk weather
in August.
A hot, wet month: the 2nd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Suffolk: daytime highs average 29.7°C and nights cool to about 21.5°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 120 mm of rain on roughly 13 days, which makes August a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 34 min on an average August day.
The nearest other city in this atlas is Portsmouth Heights (22 km away). In August its highs average 29.5°C, about as warm as Suffolk, with 119 mm of rain.
Among the 498 cities listed in the United States, Suffolk ranks joint 258th of 498 for the warmest August highs and 447th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Suffolk is 0.2°C cooler than that mean.
From August to September, average highs fall by 3.1°C to 26.6°C, and monthly rainfall rises from 120 mm to 123 mm.
The annual picture
August 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
Suffolk climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.5°C1.1°C | 1.1°C | 88 | 9.3 | 10.010 h |
| February | 11.3°C1.9°C | 1.9°C | 78 | 8.8 | 10.811 h |
| March | 15.2°C5.1°C | 5.1°C | 100 | 10.6 | 11.912 h |
| April | 20.6°C10.1°C | 10.1°C | 86 | 9.5 | 13.113 h |
| May | 24.8°C15.0°C | 15.0°C | 97 | 10.8 | 14.114 h |
| June | 28.8°C19.7°C | 19.7°C | 103 | 11.7 | 14.615 h |
| July | 30.8°C22.2°C | 22.2°C | 128 | 14.8 | 14.414 h |
| August, selected | 29.7°C21.5°C | 21.5°C | 120 | 13.1 | 13.614 h |
| September | 26.6°C18.8°C | 18.8°C | 123 | 10.9 | 12.512 h |
| October | 21.4°C12.9°C | 12.9°C | 93 | 7.6 | 11.311 h |
| November | 15.7°C7.2°C | 7.2°C | 87 | 8.4 | 10.210 h |
| December | 11.5°C3.3°C | 3.3°C | 89 | 9.5 | 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
August in nearby cities
- Portsmouth Heights in AugustUnited States · 22 kmHigh 29.5°C · Low 21.6°C · 119 mm rain
- Norfolk in AugustUnited States · 30 kmHigh 29.2°C · Low 21.7°C · 119 mm rain
- Newport News in AugustUnited States · 31 kmHigh 29.4°C · Low 21.7°C · 111 mm rain
- East Hampton in AugustUnited States · 41 kmHigh 29.0°C · Low 22.2°C · 100 mm rain
- Virginia Beach in AugustUnited States · 56 kmHigh 27.8°C · Low 23.0°C · 109 mm rain
- Richmond in AugustUnited States · 120 kmHigh 29.9°C · Low 20.6°C · 109 mm rain
- Greenville in AugustUnited States · 143 kmHigh 29.9°C · Low 21.7°C · 137 mm rain
- Raleigh in AugustUnited States · 213 kmHigh 30.1°C · Low 21.4°C · 111 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 Suffolk) is explained once on the Suffolk year overview and on the Sources, method and limits page.