August weather forecast and climate
Harrisburg, PA

A church, a mosque, and other buildings along State Street in Harrisburg, Pennsylvania
A church, a mosque, and other buildings along State Street in Harrisburg, Pennsylvania

Weather in August

The last month of the summer, August, is also a moderately hot month in Harrisburg, Pennsylvania, with average temperature varying between 81.5°F (27.5°C) and 61.9°F (16.6°C).

Temperature

In Harrisburg, the average high-temperature is practically the same as in July - a still warm 81.5°F (27.5°C). The average low-temperature, is 61.9°F (16.6°C).

Heat index

In August, the average heat index is evaluated at a hot 86.9°F (30.5°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, pregnancy, metabolic differences, and clothing affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in August is 77%.

Rainfall

The month with the most rainfall in Harrisburg is August when the rain falls for 12.3 days and typically aggregates up to 1.3" (33mm) of precipitation.

Snowfall

In Harrisburg, Pennsylvania, snow does not fall in May through October.

Daylight

The average length of the day in August is 13.7h.

Sunshine

In August, the average sunshine in Harrisburg is 10.2h.

UV index

In August, the average daily maximum UV index in Harrisburg is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 in August interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in August in Harrisburg?

In August, the average high-temperature is 81.5°F (27.5°C), and the average low-temperature is 61.9°F (16.6°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that combines both air temperature and relative humidity, in August is appraised at 86.9°F (30.5°C).

What is the average humidity in August in Harrisburg?

In Harrisburg, the average relative humidity in August is 77%.

How many days does it rain in August in Harrisburg?

In Harrisburg, during August, the rain falls for 12.3 days and regularly aggregates up to 1.3" (33mm) of precipitation.

What is the wettest month in Harrisburg?

August is the month with the most rainfall. Rain falls for 12.3 days and accumulates 1.3" (33mm) of precipitation.

When it does not snow in Harrisburg?

In Harrisburg, Pennsylvania, snow does not fall in May through October.

How many hours of daylight does Harrisburg have in August?

In Harrisburg, the average length of the day in August is 13.7h.

How many hours of sunshine does Harrisburg have in August?

In August, the average sunshine is 10.2h.

What is the UV index reading in August in Harrisburg?

The average daily maximum UV index in August in Harrisburg is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in August
Harrisburg, PA

Average temperature in August - Harrisburg, PA
  • Average high temperature in August: 81.5°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in August: 61.9°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

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Average pressure in August
Harrisburg, PA

Average pressure in August - Harrisburg, PA
  • Average pressure in August: 30"

The month with the highest atmospheric pressure is November (30.13").
The month with the lowest atmospheric pressure is June (29.95").

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Average wind speed in August
Harrisburg, PA

Average wind speed in August - Harrisburg, PA
  • Average wind speed in August: 4.8mph

The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

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Average humidity in August
Harrisburg, PA

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

The month with the highest relative humidity is February (80%).
Months with the lowest relative humidity are March and April (75%).

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Average rainfall in August
Harrisburg, PA

Average rainfall in August - Harrisburg, PA
  • Average rainfall in August: 1.3"

The wettest month (with the highest rainfall) is August (1.3").
The driest months (with the least rainfall) are January and February (0.71").

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Average rainfall days in August
Harrisburg, PA

Average rainfall days in August - Harrisburg, PA
  • Average rainfall days in August: 12.3 days

The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is January (5.7 days).

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Average snowfall in August
Harrisburg, PA

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

The month with the highest snowfall is February (1.3").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Harrisburg, PA

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

The month with the highest number of snowfall days is January (6.3 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in August / Average sunshine in August - Harrisburg, PA
  • Average daylight in August: 13.7h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in August: 10.2h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.5h).

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Average sunshine days in August
Harrisburg, PA

Average sunshine days in August - Harrisburg, PA
  • Average sunshine days in August: 16.3 days

The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is July (14.1 days).

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Average UV index in August
Harrisburg, PA

Average UV index in August - Harrisburg, PA
  • Average UV index in August: 5

Months with the highest UV index are May, June and July (UV index 6).
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
Harrisburg, PA

Average cloud cover in August - Harrisburg, PA
  • Average cloud cover in August: 32

Months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in August
Harrisburg, PA

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

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

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