August weather forecast
Chambersburg, PA

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Weather in August

August in Chambersburg, Pennsylvania welcomes the last full month of summer. If compared to the peak summer month of July, August shows a slight dip in the temperature and daylight hours. Despite the minor changes, August retains the summer atmosphere with its warm temperature. The town is bustling with summer social events and gatherings in this month. On the other hand, it also signifies the upcoming transition to the cooler autumn months.

Temperature

Chambersburg signifies an average high-temperature of a still moderately hot 81.7°F (27.6°C) in August, closely mirroring the 83.8°F (28.8°C) of July. During August, the nighttime temperature averages of 61.3°F (16.3°C).

Heat index

Throughout August, the heat index is appraised at a tropical 87.8°F (31°C). If one remains active during constant exposure, it might cause exhaustion and heat cramps.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.

Humidity

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

Rainfall

In Chambersburg, during August, the rain falls for 15.8 days and regularly aggregates up to 2.56" (65mm) of precipitation. In Chambersburg, during the entire year, the rain falls for 156 days and collects up to 27.2" (691mm) of precipitation.

Snowfall

In Chambersburg, snow does not fall in June through September.

Daylight

In Chambersburg, the average length of the day in August is 13h and 42min.
On the first day of August, sunrise is at 6:09 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:43 pm EDT.

Sunshine

The average sunshine in August is 10.1h.

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 exposure to the Sun's UV radiation for the average person.
Note: An average UV index of 5 in August transforms into this advice:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The solar radiation around mid-day is intense; avoid the Sun and stay safe. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.

Frequently asked questions

What are August temperatures?

The average high-temperature, in August, in Chambersburg, is 81.7°F (27.6°C), while the average low-temperature is 61.3°F (16.3°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 87.8°F (31°C).

What is the average humidity in August?

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

How many days does it rain in August?

In Chambersburg, in August, during 15.8 rainfall days, 2.56" (65mm) of precipitation is typically accumulated.

When it does not snow?

In Chambersburg, snow does not fall in June through September.

What is the average length of the day in August?

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

When are sunrise and sunset in August in Chambersburg?

On the first day of August, sunrise is at 6:09 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:43 pm EDT.

How long on average sun shines in August?

In Chambersburg, the average sunshine duration in August is 10.1h.

What is the UV index reading in August?

In Chambersburg, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
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
Chambersburg, PA

Average temperature in August - Chambersburg, PA
  • Average high temperature in August: 81.7°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: 61.3°F

The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

Average pressure in August
Chambersburg, PA

Average pressure in August - Chambersburg, 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
Chambersburg, PA

Average wind speed in August - Chambersburg, 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
Chambersburg, PA

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

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

Average rainfall in August
Chambersburg, PA

Average rainfall in August - Chambersburg, PA
  • Average rainfall in August: 2.56"

The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (1.85").

Average rainfall days in August
Chambersburg, PA

Average rainfall days in August - Chambersburg, PA
  • Average rainfall days in August: 15.8 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in August
Chambersburg, PA

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

The month with the highest snowfall is January (4.92").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Chambersburg, PA

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

The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Chambersburg, 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 July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).

Average sunshine days in August
Chambersburg, PA

Average sunshine days in August - Chambersburg, PA
  • Average sunshine days in August: 13.3 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (11.6 days).

Average UV index in August
Chambersburg, PA

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

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in August
Chambersburg, PA

Average cloud cover in August - Chambersburg, PA
  • Average cloud cover in August: 35

The months with the most cloud cover are January, February and December (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in August
Chambersburg, PA

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

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

Chambersburg, Pennsylvania, USA

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