August weather forecast
Delaware, USA

August continues the trend of hot summer weather in Delaware, similar to July's conditions but often slightly more tempered. Coastal regions may still experience higher humidity, leading to a perception of greater heat compared to the interior.

Temperatures in August can hover around 90°F (32.2°C), and days with such high temperatures are common, though typically fewer in number than in July. Nights bring some relief, but the persistent humidity can maintain a sensation of warmth.

As one of the wettest months, August contributes to Delaware's annual rainfall of 44" (1118mm) to 47" (1194mm). The precipitation tends to be uniformly distributed, but occasional summer storms might add to the rainfall totals.

The Atlantic Ocean, the Atlantic High, and the Appalachian Mountains continue to exert their influence on the state's climate, moderating temperatures to some extent. The Appalachian Mountains' barrier effect is less pronounced in the summer months, but the proximity to the ocean remains a key factor in Delaware's weather.

Southern Delaware, with its slightly milder temperatures, enjoys a longer growing season, a factor that remains evident in August as well.

The weather in August represents the lingering heat of summer before the gradual transition into the milder autumn months. Though not as intensely hot as July, August in Delaware retains the character of summer, filled with warmth, vitality, and the lushness of the growing season.

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• Wilmington - August »
  August is the month with the warmest seawater in Wilmington with an average ocean temperature of 73.4°F (23°C). August is the month with the warmest seawater in Wilmington, with an average ocean temperature of 73.4°F (23°C).
• Dover - August »
  The month with the most rainfall is August, when the rain falls for 15.6 days and typically aggregates up to 3.15" (80mm) of precipitation. In Dover, in August, during 15.6 rainfall days, 3.15" (80mm) of precipitation is typically accumulated.
• Newark - August »
  August brings sultry heat and sunny days to Newark, but slightly lower temperatures than July, the highs resting at around 82.9°F (28.3°C). In Newark in August, it is raining for 17 days, with typically 4.17" (106mm) of accumulated precipitation.
• Middletown - August »
  Transitioning from July to August, Middletown observes an average high-temperature of a still moderately hot 82.9°F (28.3°C), differing subtly from the previous month. The months with the highest UV index in Middletown, Delaware, are May through August, with an average maximum UV index of 6.
• Smyrna - August »
  July's transformation into August witnesses an average high-temperature of a still moderately hot 82.4°F (28°C) in Smyrna, noting a minor change from the preceding month. On the first day of August in Smyrna, sunrise is at 6:03 am and sunset at 8:14 pm.
• Milford - August »
  In Milford, Delaware, in August, during 16 rainfall days, 3.07" (78mm) of precipitation is typically accumulated. The months with the highest UV index in Milford, Delaware, are May through August, with an average maximum UV index of 6.
• Seaford - August »
  The wettest months in Seaford, Delaware, are July and August, with an average 1.06" (27mm) of rainfall. The months with the highest UV index in Seaford, Delaware, are May through August, with an average maximum UV index of 6.
• Georgetown - August »
  The month with the most rainfall in Georgetown is August, when the rain falls for 16.5 days and typically aggregates up to 3.07" (78mm) of precipitation. Georgetown experiences an average nighttime temperature of 69.3°F (20.7°C) in the month of August.
• Elsmere - August »
  In Elsmere, in August, during 14.7 rainfall days, 2.91" (74mm) of precipitation is typically accumulated. In Elsmere, during August, the rain falls for 14.7 days and regularly aggregates up to 2.91" (74mm) of precipitation.
• New Castle - August »
  August is the month with the warmest seawater in New Castle, Delaware, with an average ocean temperature of 76.3°F (24.6°C). The month with the warmest seawater in New Castle is August, with an average ocean temperature of 76.3°F (24.6°C).
• Lewes - August »
  The month with the most rainfall in Lewes is August, when the rain falls for 18.2 days and typically aggregates up to 4.13" (105mm) of precipitation. August is the month with the warmest seawater in Lewes, with an average ocean temperature of 77°F (25°C).
• Rehoboth Beach - August »
  In Rehoboth Beach, during August, the rain falls for 9.1 days and regularly aggregates up to 0.63" (16mm) of precipitation. The onset of August in Rehoboth Beach manifests an average high-temperature of a still warm 79.2°F (26.2°C), demonstrating a minor variation from the preceding month.