August weather forecast
Mercer, PA

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Weather in August

The last month of the summer, August, is another warm month in Mercer, Pennsylvania, with an average temperature ranging between min 58.3°F (14.6°C) and max 79.2°F (26.2°C).

Temperature

August welcomes an average high-temperature of a still moderately hot 79.2°F (26.2°C), not much different from the preceding month. Throughout August, the average low-temperature in Mercer dips to a moderate 58.3°F (14.6°C).

Humidity

The average relative humidity in August is 80%.

Rainfall

In Mercer, during August, the rain falls for 18.8 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Mercer, during the entire year, the rain falls for 180.8 days and collects up to 36.65" (931mm) of precipitation.

Snowfall

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

Daylight

In Mercer, the average length of the day in August is 13h and 47min.
On the first day of the month, sunrise is at 6:17 am and sunset at 8:37 pm. On the last day of August, sunrise is at 6:47 am and sunset at 7:54 pm EDT.

Sunshine

July and August, with an average of 9.9h of sunshine, are months with the most sunshine in Mercer.

UV index

May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 in August transforms into the following instructions:
Ensure safety - Sun damage prevention is strongly urged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
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Frequently asked questions

What is the average August temperature in Mercer?

August temperatures in Mercer vary between a high-temperature of 79.2°F (26.2°C) and a low-temperature of 58.3°F (14.6°C).

What is the average humidity in August in Mercer?

The average relative humidity in August is 80%.

How many days does it rain in August in Mercer?

In Mercer, Pennsylvania, in August, during 18.8 rainfall days, 2.76" (70mm) of precipitation is typically accumulated.

When it does not snow in Mercer?

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

How many hours of daylight does Mercer have in August?

In Mercer, Pennsylvania, the average day length in August is 13h and 47min.

When are sunrise and sunset in August in Mercer?

In August, on the first day of the month, sunrise is at 6:17 am and sunset at 8:37 pm. On the last day of the month, in Mercer, Pennsylvania, sunrise is at 6:47 am and sunset at 7:54 pm EDT.

What are the months with the most sunshine in Mercer?

July and August, with an average of 9.9h of sunshine, are months with the most sunshine in Mercer, Pennsylvania.

How long on average sun shines in August in Mercer?

The average sunshine duration in August is 9.9h.

What are the months with the highest UV index in Mercer?

May through August, with an average maximum UV index of 5, are months with the highest UV index.

How high is the UV index in August in Mercer?

In Mercer, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's 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
Mercer, PA

Average temperature in August - Mercer, PA
  • Average high temperature in August: 79.2°F

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in August: 58.3°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).

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Average pressure in August
Mercer, PA

Average pressure in August - Mercer, PA
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in August
Mercer, PA

Average wind speed in August - Mercer, PA
  • Average wind speed in August: 5.2mph

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average humidity in August
Mercer, PA

Average humidity in August - Mercer, PA
  • Average humidity in August: 80%

The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are April, May and July (79%).

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Average rainfall in August
Mercer, PA

Average rainfall in August - Mercer, PA
  • Average rainfall in August: 2.76"

The wettest months (with the highest rainfall) are April and June (3.74").
The driest month (with the least rainfall) is November (2.2").

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Average rainfall days in August
Mercer, PA

Average rainfall days in August - Mercer, PA
  • Average rainfall days in August: 18.8 days

The month with the highest number of rainy days is May (20.9 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in August
Mercer, PA

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

The month with the highest snowfall is January (8.27").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Mercer, PA

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

The month with the highest number of snowfall days is January (19.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Mercer, PA
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 9h and 5min

The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).

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Average sunshine days in August
Mercer, PA

Average sunshine days in August - Mercer, PA
  • Average sunshine days in August: 10.5 days

The month with the most sunshine days is September (14 days).
The month with the least sunshine days is February (6.2 days).

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Average UV index in August
Mercer, PA

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

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in August
Mercer, PA

Average cloud cover in August - Mercer, PA
  • Average cloud cover in August: 36

The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 36).

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Average visibility in August
Mercer, PA

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

The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).

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Mercer, Pennsylvania, USA

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