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

The onset of August manifests an average high-temperature of a still warm 81.9°F (27.7°C), demonstrating a minor variation from the preceding month. Throughout August, the average low-temperature dips to an agreeable 68.4°F (20.2°C).

Heat index

The heat index value for August is computed to be a tropical 87.8°F (31°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.

Humidity

The average relative humidity in August is 78%.

Rainfall

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

Snowfall

April through November are months without snowfall.

Daylight

The average length of the day in August is 13h and 39min.
On the first day of August, 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.

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 health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In August, a daily UV index of 6 turns into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.

Frequently asked questions

What is the average August temperature?

An average high-temperature, in August, in Dover, is 81.9°F (27.7°C) and the average low-temperature is 68.4°F (20.2°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 87.8°F (31°C).

What is the average humidity in August?

The average relative humidity in August is 78%.

What is the rainiest month?

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

How many days does it rain in August?

In Dover, in August, it is raining for 15.6 days, with typically 3.15" (80mm) of accumulated precipitation.

When it does not snow?

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

How many hours of daylight does Dover have in August?

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

When is the sunrise / sunset in August?

On the first day of August, 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 long on average sun shines in August?

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

When is the highest UV index?

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

How high is the UV index in August?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unprotected exposure to UV radiation.
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).

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).

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).

Dover, Delaware, USA

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