Average August Weather in Delaware

Typical temperatures, precipitation, humidity and sunshine during August at cities and towns throughout Delaware are listed below.

Temperatures in Delaware for August

This table gives the averages in degrees Fahrenheit and Celsius for maximum and minimum monthly temperatures. These normal temperatures are based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.

Average August temperatures

High °F	Low °F	Place	High °C	Low °C
85	67	Dover	30	20
86	68	Georgetown	30	20
85	65	Greenwood	29	18
86	69	Lewes	30	21
87	65	Newark	30	18
85	67	Wilmington	29	19

Precipitation in Delaware for August

Here are the August averages for rainfall in Delaware. Each place has a total for how many days of wet weather it usually gets this month and for the normal amount of precipitation, based on the weather during 1991 to 2020. The calculation of days only includes those when precipitation totalled 0.01 inches (0.25 millimetres) or more.

Average precipitation in August

Days	Place	Inches	Milli­metres
8	Dover	4.9	125
12	Georgetown	4.0	101
8	Greenwood	4.5	114
9	Lewes	4.3	109
8	Newark	4.0	100
9	Wilmington	4.0	101

Sunshine in Delaware for August

In the table below, the average number of Sunny Days in Delaware is the total days this month when the sky is mostly clear. This includes the days when cloud covers up to 30% of the sky during daylight hours.

Partly Sunny Days have cloud covering from 40% to 70% of the sky during the daytime. The rest of the days during August are mainly overcast, with at least 80% cloud cover. Total Days With Sun is a sum of the Sunny plus Partly Sunny days. These numbers are averages of most the years the weather station has operated.

Days of sunshine in August

City	Sunny	Partly Sunny	Total Days With Sun
Wilmington	9	10	19

Humidity in Delaware

In the table below, the Daily number is the average of relative humidity readings taken every three hours throughout the day. Morning percentages are for 7 am and Afternoon levels are for 4 pm local standard time. All the humidity numbers are averages for the years 1961 to 1990.

Average August humidity (%)

Daily	City	Morning	Afternoon
72	Wilmington	83	56