August weather forecast
Washington, PA

Share

Weather in August

August shares July's fervor but with a somewhat cooler ambience. Despite a slight decline in temperature levels, a maximum of 82°F (27.8°C) can still be reached, symbolizing the sun's persistent grip. Unlike the previous month, precipitation experiences a decrease to 1.26" (32mm), reinforcing the dominance of dry, hot weather. The ebbs and flows of the summer heat, intertwined with the lengthy sunny days, encapsulate the essence of an August in Washington. This month, while signaling the impending arrival of fall, withholds its stampede of warmth, ensuring the summer spirit resonates in every corner of the city.

Temperature

Washington, Pennsylvania, observes an average high-temperature of a still warm 82°F (27.8°C) in August, barely different from 83.3°F (28.5°C) in July. Washington's average nighttime temperatures present a clear contrast to its daytime highs, measured at a mild 59.9°F (15.5°C) in August.

Heat index

August's average heat index is appraised at a tropical 87.8°F (31°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Heat index evaluations are typically in the context of light winds and shaded environments. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. 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 are of high significance for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.

Humidity

April, July and August, with an average relative humidity of 77%, are the least humid months.

Rainfall

In August, the rain falls for 14.8 days. Throughout August, 1.26" (32mm) of precipitation is accumulated. In Washington, during the entire year, the rain falls for 143 days and collects up to 14.8" (376mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In Washington, the average length of the day in August is 13h and 43min.
On the first day of August in Washington, Pennsylvania, sunrise is at 6:19 am and sunset at 8:34 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 7:53 pm EDT.

Sunshine

The month with the most sunshine in Washington is August, with an average of 10.2h of sunshine.

UV index

June 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 health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A typical high UV index of 6 in August suggests the following recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. 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. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in August?

In August, the average high-temperature and low-temperature in Washington are 82°F (27.8°C) and 59.9°F (15.5°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in August is appraised at 87.8°F (31°C).

What are the least humid months?

The months with the lowest humidity are April, July and August, with an average relative humidity of 77%.

What is the average humidity in August in Washington?

The average relative humidity in August is 77%.

How many days does it rain in August?

In Washington, in August, it is raining for 14.8 days, with typically 1.26" (32mm) of accumulated precipitation.

When it does not snow?

In Washington, Pennsylvania, snow does not fall in June through September.

How many hours of daylight does Washington have in August?

The average day length in August in Washington is 13h and 43min.

What time are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 6:19 am and sunset at 8:34 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 7:53 pm EDT.

What month has the most sunshine?

August has the most sunshine of the year, with an average of 10.2h of sunshine.

How long on average sun shines in August?

In Washington, the average sunshine duration in August is 10.2h.

What is the month with the highest UV index?

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

What is the UV index reading in August?

In Washington, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.
Average max. wind speed
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
Washington, PA

Average temperature in August - Washington, PA
  • Average high temperature in August: 82°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.6°F).

  • Average low temperature in August: 59.9°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).

Average pressure in August
Washington, PA

Average pressure in August - Washington, PA
  • Average pressure in August: 30"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in August
Washington, PA

Average wind speed in August - Washington, PA
  • Average wind speed in August: 4.5mph

The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

Average humidity in August
Washington, PA

Average humidity in August - Washington, PA
  • Average humidity in August: 77%

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (77%).

Average rainfall in August
Washington, PA

Average rainfall in August - Washington, PA
  • Average rainfall in August: 1.26"

The wettest month (with the highest rainfall) is July (1.65").
The driest months (with the least rainfall) are January and November (0.94").

Average rainfall days in August
Washington, PA

Average rainfall days in August - Washington, PA
  • Average rainfall days in August: 14.8 days

The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is February (7.3 days).

Average snowfall in August
Washington, PA

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

The month with the highest snowfall is February (1.26").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Washington, PA

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

The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Washington, 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 1min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in August
Washington, PA

Average sunshine days in August - Washington, PA
  • Average sunshine days in August: 13.9 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).

Average UV index in August
Washington, PA

Average UV index in August - Washington, PA
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in August
Washington, PA

Average cloud cover in August - Washington, PA
  • Average cloud cover in August: 33

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in August
Washington, PA

Average visibility in August - Washington, PA
  • Average visibility in August: 5mi

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

Washington, Pennsylvania, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location