August weather forecast
Mercersville, MD

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Weather in August

The last month of the summer, August, is another warm month in Mercersville, Maryland, with an average temperature varying between 83.3°F (28.5°C) and 62.6°F (17°C).

Temperature

The advent of August reveals an average high-temperature of a still moderately hot 83.3°F (28.5°C), showing minimal difference from the prior month. The average low-temperature, in August, is a refreshing 62.6°F (17°C).

Heat index

August's heat index is estimated at a tropical 91.4°F (33°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'feels like' or 'real feel', provides an understanding of perceived warmth by combining temperature and relative humidity. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In August, the average relative humidity in Mercersville is 76%.

Rainfall

In Mercersville, during August, the rain falls for 16.3 days and regularly aggregates up to 2.91" (74mm) of precipitation. In Mercersville, during the entire year, the rain falls for 162.4 days and collects up to 30.16" (766mm) of precipitation.

Snowfall

In Mercersville, snow does not fall in May through September.

Daylight

In August, the average length of the day is 13h and 40min.
On the first day of August, sunrise is at 6:11 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 7:43 pm EDT.

Sunshine

The average sunshine in August in Mercersville is 10.2h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum high UV index of 6 in August translates into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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Frequently asked questions

Is it hot in Mercersville during August?

Mercersville in August has an average high-temperature of 83.3°F (28.5°C) and an average low-temperature of 62.6°F (17°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is estimated at 91.4°F (33°C).

What is the average humidity in August in Mercersville?

In Mercersville, Maryland, the average relative humidity in August is 76%.

How many days does it rain in August in Mercersville?

In Mercersville, Maryland, during August, the rain falls for 16.3 days and regularly aggregates up to 2.91" (74mm) of precipitation.

When it does not snow in Mercersville?

In Mercersville, Maryland, snow does not fall in May through September.

How many hours of daylight does Mercersville have in August?

In August, the average day length in Mercersville is 13h and 40min.

What time are sunrise and sunset in August in Mercersville?

In August, on the first day of the month, sunrise is at 6:11 am and sunset at 8:23 pm. On the last day of the month, in Mercersville, sunrise is at 6:39 am and sunset at 7:43 pm EDT.

How many hours of sunshine does Mercersville have in August?

The average sunshine duration in August is 10.2h.

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

The months with the highest UV index are May through August, with an average maximum UV index of 6.

How high is the UV index in August in Mercersville?

The average daily maximum UV index in August in Mercersville is 6. A UV Index estimate of 6 to 7 represents a high health threat 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
Mercersville, MD

Average temperature in August - Mercersville, MD
  • Average high temperature in August: 83.3°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in August: 62.6°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

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Average pressure in August
Mercersville, MD

Average pressure in August - Mercersville, MD
  • 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).

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Average wind speed in August
Mercersville, MD

Average wind speed in August - Mercersville, MD
  • Average wind speed in August: 4.5mph

The windiest months (with the highest average wind speed) are January, February and March (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

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Average humidity in August
Mercersville, MD

Average humidity in August - Mercersville, MD
  • Average humidity in August: 76%

The months with the highest relative humidity are May, October and December (79%).
The month with the lowest relative humidity is July (74%).

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Average rainfall in August
Mercersville, MD

Average rainfall in August - Mercersville, MD
  • Average rainfall in August: 2.91"

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is January (1.97").

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Average rainfall days in August
Mercersville, MD

Average rainfall days in August - Mercersville, MD
  • Average rainfall days in August: 16.3 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (9.4 days).

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Average snowfall in August
Mercersville, MD

Average snowfall in August - Mercersville, MD
  • Average snowfall in August: 0"

The month with the highest snowfall is January (4.72").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Mercersville, MD

Average snowfall days in August - Mercersville, MD
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Mercersville, MD

Average daylight in August / Average sunshine in August - Mercersville, MD
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 54min).
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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in August
Mercersville, MD

Average sunshine days in August - Mercersville, MD
  • Average sunshine days in August: 12.8 days

The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is April (11 days).

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Average UV index in August
Mercersville, MD

Average UV index in August - Mercersville, MD
  • Average UV index in August: 6

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

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Average cloud cover in August
Mercersville, MD

Average cloud cover in August - Mercersville, MD
  • Average cloud cover in August: 33

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in August
Mercersville, MD

Average visibility in August - Mercersville, MD
  • Average visibility in August: 6mi

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

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Mercersville, Maryland, USA

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