August weather forecast
Dover, DE

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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 sustains the summer's fervent heat, albeit with a temperature decrease to a high of 81.9°F (27.7°C). The frequency of rainfall days remains at 15.6, contributing to a monthly average rainfall of 3.15" (80mm). As a result, this month is considered to be the year's wettest. August does mark a decrease in daily sunshine hours, dropping to 10.4 hours against a day-length averaging 13.7 hours. This slight fall in solar illumination allows for a transitional phase from sweltering summer towards a more temperate fall season.

Temperature

In August, Dover experiences a minor shift in meteorological conditions with average high-temperatures marked at a still moderately hot 81.9°F (27.7°C), closely mirroring the climate in July. The average nighttime temperature in Dover lowers to a pleasant 68.4°F (20.2°C) throughout August.

Heat index

During August, the heat index is estimated at a hot 87.8°F (31°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.
Given the heat index, its values are aligned with shaded sites and gentle winds. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', evaluates the perceived heat by adding the effect of moisture in the air. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

In August, the average relative humidity is 78%.

Rainfall

August is the month with the most rainfall in Dover. Rain falls for 15.6 days and accumulates 3.15" (80mm) of precipitation.

Snowfall

In Dover, snow does not fall in April through November.

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 6:03 am and sunset at 8:13 pm. On the last day of August, in Dover, sunrise is at 6:30 am and sunset at 7:33 pm EDT.

Sunshine

In August, the average sunshine 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 estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum UV index of 6 during August leads to these instructions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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Frequently asked questions

What are the temperatures in Dover in August?

August temperatures vary between a high-temperature of 81.9°F (27.7°C) and a low-temperature of 68.4°F (20.2°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, is estimated at 87.8°F (31°C).

What is the average humidity in August in Dover?

In August, the average relative humidity in Dover 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 Dover, in August, during 15.6 rainfall days, 3.15" (80mm) of precipitation is typically accumulated.

When it does not snow in Dover?

In Dover, Delaware, snow does not fall in April through November.

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

In Dover, the average day length in August is 13h and 39min.

When are sunrise and sunset in August in Dover?

On the first day of August in Dover, sunrise is at 6:03 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:33 pm EDT.

How many hours of sunshine does Dover have in August?

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

When is the highest UV index in Dover?

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

What is the UV index intensity in August in Dover?

In Dover, Delaware, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
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 4min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 10h and 2min

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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Dover, Delaware, USA

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