August weather forecast
Dover, DE

The public Archives building in Dover, Delaware, between two large trees
The public Archives building in Dover, Delaware, between two large trees

Weather in August

August, the last month of the summer in Dover, is also a moderately hot month, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 68.4°F (20.2°C).

Temperature

In August, the average high-temperature is practically the same as in July - a still warm 81.9°F (27.7°C). The average low-temperature, in August, is 68.4°F (20.2°C).

Heat index

In August, the average heat index is calculated to be a tropical 88°F (31.1°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like clothing, differences in body mass, height, and shape, wind, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Dover, the average relative humidity in August is 78%.

Rainfall

The month with the most rainfall in Dover is August, when the rain falls for 15.6 days and typically aggregates up to 3.15" (80mm) of precipitation.

Snowfall

April through November are months without snowfall in Dover.

Daylight

In Dover, the average length of the day in August is 13h and 39min.
On the first day of the month, sunrise is at 6:02 am and sunset at 8:14 pm. On the last day of August, sunrise is at 6:30 am and sunset at 7:34 pm EDT.

Sunshine

In Dover, the average sunshine in August is 10.4h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 in August interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in August in Dover?

The average high-temperature, in August, in Dover, Delaware, is 81.9°F (27.7°C), while the average low-temperature is 68.4°F (20.2°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, in August is calculated to be 88°F (31.1°C).

What is the average humidity in August in Dover?

In Dover, Delaware, the average relative humidity in August is 78%.

What is the rainiest month in Dover?

The month with the most rainfall in Dover, Delaware, is August, when the rain falls for 15.6 days and typically aggregates up to 3.15" (80mm) of precipitation.

How many days does it rain in August in Dover?

In August, the rain falls for 15.6 days. Throughout August, 3.15" (80mm) of precipitation is accumulated.

When it does not snow in Dover?

April through November are months without snowfall in Dover.

What is the average length of the day in August in Dover?

The average day length in August is 13h and 39min.

When is the sunrise / sunset in August in Dover?

On the first day of August, sunrise is at 6:02 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:34 pm EDT.

How long on average sun shines in August in Dover?

In Dover, the average sunshine duration in August is 10.4h.

What are the months with the highest UV index in Dover?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Dover, Delaware.

What is the UV index intensity in August in Dover?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Dover, DE

Average temperature in August - Dover, DE
  • Average high temperature in August: 81.9°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in August: 68.4°F

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

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Average pressure in August
Dover, DE

Average pressure in August - Dover, DE
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in August
Dover, DE

Average wind speed in August - Dover, DE
  • Average wind speed in August: 6.4mph

The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

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Average humidity in August
Dover, DE

Average humidity in August - Dover, DE
  • Average humidity in August: 78%

The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January, March, April and November (74%).

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Average rainfall in August
Dover, DE

Average rainfall in August - Dover, DE
  • Average rainfall in August: 3.15"

The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is January (1.46").

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Average rainfall days in August
Dover, DE

Average rainfall days in August - Dover, DE
  • Average rainfall days in August: 15.6 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (8.1 days).

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Average snowfall in August
Dover, DE

Average snowfall in August - Dover, DE
  • Average snowfall in August: 0"

The month with the highest snowfall is January (1.65").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in August
Dover, DE

Average snowfall days in August - Dover, DE
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (3.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in August /
Average sunshine in August
Dover, DE

Average daylight in August / Average sunshine in August - Dover, DE
  • Average daylight in August: 13h and 39min

The month with the longest days is June (Average daylight: 14h and 53min).
The month with the shortest days is December (Average daylight: 9h and 28min).

  • Average sunshine in August: 10h and 24min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

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Average sunshine days in August
Dover, DE

Average sunshine days in August - Dover, DE
  • Average sunshine days in August: 12.6 days

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (10.8 days).

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Average UV index in August
Dover, DE

Average UV index in August - Dover, DE
  • Average UV index in August: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in August
Dover, DE

Average cloud cover in August - Dover, DE
  • Average cloud cover in August: 29

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in August
Dover, DE

Average visibility in August - Dover, DE
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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