August weather forecast
Downingtown, PA

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Weather in August

In August, Downingtown experiences a slight dip in temperatures, allowing for some respite from the intense July heat. As the city moves towards the end of summer, temperatures still run high at approximately 81.1°F (27.3°C). Despite the heat, the weather remains pleasant, and the signature sunshine persists. As the August days whittle down, the city starts to brace itself for the beginning of fall in September.

Temperature

Downingtown signifies an average high-temperature of a still moderately hot 81.1°F (27.3°C) in August, closely mirroring the 84°F (28.9°C) of July. Downingtown's nighttime temperature during August is consistently averaged at an enjoyable 64.4°F (18°C).

Heat index

During August, the heat index is calculated to be a tropical 86°F (30°C). With sustained exposure and activity, exhaustion becomes probable, resulting in heat cramps.
Consider that heat index readings are for situations in the shade and light wind. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines both the air temperature and the humidity level to give a perceived human temperature. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.

Humidity

The average relative humidity in August is 78%.

Rainfall

The month with the most rainfall is August, when the rain falls for 15.4 days and typically aggregates up to 3.31" (84mm) of precipitation.

Snowfall

June through September are months without snowfall in Downingtown.

Daylight

In Downingtown, the average length of the day in August is 13h and 42min.
On the first day of August, sunrise is at 6:01 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:35 pm EDT.

Sunshine

In August, the average sunshine is 10h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 6 in August translates into this advice:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
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Frequently asked questions

What is the average August temperature in Downingtown?

In Downingtown, 81.1°F (27.3°C) is the average high-temperature and 64.4°F (18°C) is the average low-temperature during August. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, in August is calculated to be 86°F (30°C).

What is the average humidity in August in Downingtown?

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

What is the rainiest month in Downingtown?

August is the month with the most rainfall in Downingtown. Rain falls for 15.4 days and accumulates 3.31" (84mm) of precipitation.

How much does it rain in Downingtown in August?

In Downingtown, Pennsylvania, in August, during 15.4 rainfall days, 3.31" (84mm) of precipitation is typically accumulated.

When it does not snow in Downingtown?

June through September are months without snowfall in Downingtown, Pennsylvania.

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

In August, the average day length is 13h and 42min.

What time are sunrise and sunset in August in Downingtown?

In August, on the first day of the month, sunrise is at 6:01 am and sunset at 8:16 pm. On the last day of the month, in Downingtown, sunrise is at 6:30 am and sunset at 7:35 pm EDT.

How many hours of sunshine does Downingtown have in August?

In Downingtown, Pennsylvania, the average sunshine duration in August is 10h.

When is the highest UV index in Downingtown?

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

How high is the UV index in August in Downingtown?

In August, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from 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
Downingtown, PA

Average temperature in August - Downingtown, PA
  • Average high temperature in August: 81.1°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (35.4°F).

  • Average low temperature in August: 64.4°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).

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Average pressure in August
Downingtown, PA

Average pressure in August - Downingtown, PA
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in August
Downingtown, PA

Average wind speed in August - Downingtown, PA
  • Average wind speed in August: 5.2mph

The windiest months (with the highest average wind speed) are January and March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average humidity in August
Downingtown, PA

Average humidity in August - Downingtown, PA
  • Average humidity in August: 78%

The months with the highest relative humidity are February, May and October (80%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in August
Downingtown, PA

Average rainfall in August - Downingtown, PA
  • Average rainfall in August: 3.31"

The wettest month (with the highest rainfall) is August (3.31").
The driest month (with the least rainfall) is February (1.61").

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Average rainfall days in August
Downingtown, PA

Average rainfall days in August - Downingtown, PA
  • Average rainfall days in August: 15.4 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (6.7 days).

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Average snowfall in August
Downingtown, PA

Average snowfall in August - Downingtown, PA
  • Average snowfall in August: 0"

The month with the highest snowfall is March (3.46").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Downingtown, PA

Average snowfall days in August - Downingtown, PA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (4.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Downingtown, PA

Average daylight in August / Average sunshine in August - Downingtown, PA
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in August: 10h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in August
Downingtown, PA

Average sunshine days in August - Downingtown, PA
  • Average sunshine days in August: 13.2 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (12.3 days).

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Average UV index in August
Downingtown, PA

Average UV index in August - Downingtown, PA
  • 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, February, March, November and December (UV index 2).

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Average cloud cover in August
Downingtown, PA

Average cloud cover in August - Downingtown, PA
  • Average cloud cover in August: 34

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in August
Downingtown, PA

Average visibility in August - Downingtown, PA
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).

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Downingtown, Pennsylvania, USA

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