Harrisburg
Pennsylvania, USA
Long-term weather forecast
Long-term weather forecast

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
August, the last month of the summer, in Harrisburg, is another warm month, with average temperature ranging between min 64.6°F (18.1°C) and max 83.5°F (28.6°C).

Temperature

In Harrisburg, the average high-temperature is almost the same as in July - a still warm 83.5°F (28.6°C). The average low-temperature, in August, is 64.6°F (18.1°C).

Heat index

In August, the average heat index is estimated at a hot 90°F (32.2°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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', 'real feel', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, metabolic differences, clothing), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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

The average relative humidity in Harrisburg is 72.2%.

Rainfall

In Harrisburg, during August, the rain falls for 9.1 days and regularly aggregates up to 3.2" (81.3mm) of precipitation. Throughout the year, there are 122 rainfall days, and 40.7" (1034.8mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Harrisburg.

Daylight

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

Sunshine

In August, the average sunshine is 9.2h.

UV index

The average daily maximum UV index in August is 8. A UV Index of 8 to 10 symbolizes a very high health vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 8 interpret into the following advice:
Take special precautions, as unprotected skin can be damaged and can burn quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in August in Harrisburg?

The average high-temperature, in August, is 83.5°F (28.6°C), while the average low-temperature is 64.6°F (18.1°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that combines both air temperature and relative humidity, is evaluated at 90°F (32.2°C).

What is the average humidity in August in Harrisburg?

In August, the average relative humidity in Harrisburg, Pennsylvania, is 72.2%.

How much does it rain in Harrisburg in August?

In Harrisburg, Pennsylvania, in August, during 9.1 rainfall days, 3.2" (81.3mm) of precipitation is typically accumulated.

When it does not snow in Harrisburg?

In Harrisburg snow does not fall in May through October.

How many hours of daylight does Harrisburg have in August?

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

How long on average sun shines in August in Harrisburg?

In August, the average sunshine in Harrisburg is 9.2h.

How high is the UV index in August in Harrisburg?

The average daily maximum UV index in August in Harrisburg, Pennsylvania, is 8. A UV Index of 8 to 10 symbolizes a very high health risk from the exposure to the Sun's UV radiation.
Average temperature in August - Harrisburg, PA
  • Average high temperature in August: 83.4°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in August: 64.5°F

The month with the highest average low temperature is July (66.3°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).

Average humidity in August - Harrisburg, PA
  • Average humidity in August: 72.2%

The month with the highest relative humidity is September (73.8%).
The month with the lowest relative humidity is April (59.2%).

Average rainfall in August - Harrisburg, PA
  • Average rainfall in August: 3.2"

The wettest month (with the highest rainfall) is July (4.6").
The driest month (with the lowest rainfall) is February (2.4").

Average rainfall days in August - Harrisburg, PA
  • Average rainfall days in August: 9.1 days

The month with the highest number of rainy days is May (12.2 days).
The month with the lowest number of rainy days is October (8.8 days).

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

The month with the highest snowfall is February (10.5").
Months with the lowest snowfall are May, June, July, August, September and October (0").

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 (5.2 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

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 shortest days is December (Average daylight: 9.4h).

  • Average sunshine in August: 9.2h

The month with most sunshine is July (Average sunshine: 10h).
The month with least sunshine is December (Average sunshine: 4.1h).

Average UV index in August - Harrisburg, PA
  • Average UV index in August: 8

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).