August weather forecast
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 another warm month in Harrisburg, Pennsylvania, with an average temperature ranging between max 81.5°F (27.5°C) and min 61.9°F (16.6°C).

Temperature

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

Heat index

In August, the average heat index is calculated to be a hot 86.9°F (30.5°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, differences in body mass, height, and shape, wind), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

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

Rainfall

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

Snowfall

May through October are months without snowfall in Harrisburg.

Daylight

In August, the average length of the day is 13h and 43min.
On the first day of the month, sunrise is at 6:05 am and sunset at 8:22 pm. On the last day of August, in Harrisburg, sunrise is at 6:34 am and sunset at 7:41 pm EDT.

Sunshine

The average sunshine in August in Harrisburg is 10.2h.

UV index

In August, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In August, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in August in Harrisburg?

The average high-temperature, in August, in Harrisburg, is 81.5°F (27.5°C), while the average low-temperature is 61.9°F (16.6°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in August is calculated to be 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%.

What is the rainiest month in Harrisburg?

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

How much does it rain in Harrisburg in August?

In Harrisburg, Pennsylvania, in August, during 12.3 rainfall days, 1.3" (33mm) of precipitation is typically accumulated.

When it does not snow in Harrisburg?

May through October are months without snowfall in Harrisburg.

How many hours of daylight does Harrisburg have in August?

In August, the average day length is 13h and 43min.

When is the sunrise / sunset in August in Harrisburg?

In August, on the first day of the month, sunrise is at 6:05 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 7:41 pm EDT.

How many hours of sunshine does Harrisburg have in August?

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

What is the UV index intensity in August in Harrisburg?

The average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to 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"Hg

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

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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%).
The 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").
The 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).
The 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: 13h and 43min

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 22min).

  • 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

The months with the highest UV index are May, June and July (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
Harrisburg, PA

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

The 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

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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