Dover, DE weather in August
In August, Dover sees highs around 85°F and lows around 67°F: warm and oppressively humid, with some rain. There are about 8 days with rain. It is one of the warmest months in Dover.
- Normal high
- 85°F
- Normal low
- 67°F
- Wet days
- 8
- 4.9 in total
- Muggy days
- 20
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 86°F | 83°F |
| Normal low | 69°F | 65°F |
| Chance of a wet day | 29% | 25% |
| Sunrise / sunset | 6:02 am / 8:14 pm | 6:29 am / 7:34 pm |
| Daylight | 14.2 h | 13.1 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical August day
- 6 am69°Fdew point 66°F
- 9 am77°Fdew point 68°F
- Noon82°Fdew point 67°F
- 3 pm82°Fdew point 66°F
- 6 pm79°Fdew point 66°F
- 9 pm73°Fdew point 67°F
NOAA hourly normals (local standard time) from Dover AFB (4 mi away); average wind 7 mph; clear or few clouds in 46% of daytime hours, mostly cloudy or overcast in 37%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F2 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph21 of 31
- Hot dayshigh 90°F or more6 of 31
- Muggy daysdaily mean dew point 65°F or more20 of 31
- Wet daysat least 0.01 in of rain or melted snow8 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 4.9 in; a dry August brings about 2.9 in and a wet one about 6.9 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202016: average high 89°F
- Coolest August1992: average high 81°F
- Wettest August2009: 9.0 in
- Driest August2006: 0.3 in
- Highest reading97°F (August 25, 2007)
- Lowest reading52°F (August 30, 1992)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 87°F | 85°F | 79°F |
| Normal low | 69°F | 67°F | 61°F |
| Wet days | 9 | 8 | 8 |
| Comfortable days | 1 | 2 | 10 |
| Daylight | 14.6 h | 13.7 h | 12.4 h |
Highs change by -2°F from July and -6°F into September.
Nearby alternatives in August
- Cooler: Montauk, NY229 mi · high 80°F · 9 wet days
How Dover ranks in August
- Normal high206th warmest of 378 cities; 1st of 2 in Delaware
- Wet days158th driest of 378
- Comfortable days178th most of 341
What to pack for Dover in August
- Light, breathable clothing – highs near 85°F and about 20 muggy days
- A rain jacket or umbrella – rain on about 8 days
- A swimsuit – about 21 beach days
Heating and cooling
August has 0 heating degree days and 347 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How hot is Dover in August?
The normal high is 85°F and the normal low is 67°F. From 1991 to 2020 the hottest August reading was 97°F (August 25, 2007).
Does it rain a lot in Dover in August?
About 8 days in August have at least 0.01 in of precipitation, and the normal total is 4.9 in. The wettest August in 1991-2020 was in 2009 (9.0 in); the driest was in 2006 (0.3 in).
Is August a good time to visit Dover?
August ranks 8th of 12 months on our comfort score for Dover (50 out of 100). It has about 2 comfortable days and about 6 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Dover (USC00072730), 1.3 mi SE of the city center, 30 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Dover AFB (USW00013707), 3.5 mi ESE of the city center, 23 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Dover AFB Airport (724088-13707), 3.5 mi ESE of the city center, 28 ft . Hourly observations, 1991-2020.