May weather forecast
Summerville, PA

Weather in May

The last month of the spring, May, is an agreeable month in Summerville, Pennsylvania, with an average temperature ranging between max 68.5°F (20.3°C) and min 47.8°F (8.8°C).

Temperature

In Summerville, the average high-temperature in May rises from a moderate 56.3°F (13.5°C) in April to an agreeable 68.5°F (20.3°C). The average low-temperature, in May, is 47.8°F (8.8°C).

Humidity

The average relative humidity in May is 79%.

Rainfall

In May, the rain falls for 17.4 days. Throughout May, 2.32" (59mm) of precipitation is accumulated. In Summerville, during the entire year, the rain falls for 150.5 days and collects up to 22.05" (560mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.5 snowfall days, Summerville aggregates 0.75" (19mm) of snow. Throughout the year, in Summerville, Pennsylvania, there are 72.4 snowfall days, and 22.28" (566mm) of snow is accumulated.

Daylight

In Summerville, the average length of the day in May is 14h and 30min.
On the first day of the month, sunrise is at 6:14 am and sunset at 8:13 pm. On the last day of May, in Summerville, sunrise is at 5:46 am and sunset at 8:42 pm EDT.

Sunshine

In Summerville, the average sunshine in May is 8.3h.

UV index

May through August, with an average maximum UV index of 5, are months with the highest UV index in Summerville. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 5 in May transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in May in Summerville?

The average high-temperature, in May, in Summerville, is 68.5°F (20.3°C), while the average low-temperature is 47.8°F (8.8°C).

What is the average humidity in May in Summerville?

In Summerville, Pennsylvania, the average relative humidity in May is 79%.

How much does it rain in Summerville in May?

In Summerville, Pennsylvania, in May, during 17.4 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

What is the last month it snows in Summerville?

May is the last month it regularly snows in Summerville, Pennsylvania. During 0.5 snowfall days, in May, Summerville aggregates 0.75" (19mm) of snow.

What is the average length of the day in May in Summerville?

The average day length in May is 14h and 30min.

When is the sunrise / sunset in May in Summerville?

On the first day of May, sunrise is at 6:14 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 8:42 pm EDT.

How long on average sun shines in May in Summerville?

The average sunshine duration in May is 8.3h.

What is the month with the highest UV index in Summerville?

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

What is the UV index intensity in May in Summerville?

In Summerville, Pennsylvania, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Summerville, PA

Average temperature in May - Summerville, PA
  • Average high temperature in May: 68.5°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (30.2°F).

  • Average low temperature in May: 47.8°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).

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Average pressure in May
Summerville, PA

Average pressure in May - Summerville, PA
  • Average pressure in May: 30"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 May
Summerville, PA

Average wind speed in May - Summerville, PA
  • Average wind speed in May: 7mph

The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in May
Summerville, PA

Average humidity in May - Summerville, PA
  • Average humidity in May: 79%

The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are June, July and August (78%).

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Average rainfall in May
Summerville, PA

Average rainfall in May - Summerville, PA
  • Average rainfall in May: 2.32"

The wettest month (with the highest rainfall) is April (2.56").
The driest month (with the least rainfall) is November (1.26").

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Average rainfall days in May
Summerville, PA

Average rainfall days in May - Summerville, PA
  • Average rainfall days in May: 17.4 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.2 days).

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Average snowfall in May
Summerville, PA

Average snowfall in May - Summerville, PA
  • Average snowfall in May: 0.75"

The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Summerville, PA

Average snowfall days in May - Summerville, PA
  • Average snowfall days in May: 0.5 days

The month with the highest number of snowfall days is January (18 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Summerville, PA

Average daylight in May / Average sunshine in May - Summerville, PA
  • Average daylight in May: 14h and 30min

The month with the longest days is June (Average daylight: 15h and 5min).
The month with the shortest days is December (Average daylight: 9h and 16min).

  • Average sunshine in May: 8h and 18min

The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

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Average sunshine days in May
Summerville, PA

Average sunshine days in May - Summerville, PA
  • Average sunshine days in May: 10.9 days

The month with the most sunshine days is November (15.3 days).
The month with the least sunshine days is February (8.1 days).

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Average UV index in May
Summerville, PA

Average UV index in May - Summerville, PA
  • Average UV index in May: 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 May
Summerville, PA

Average cloud cover in May - Summerville, PA
  • Average cloud cover in May: 49

The month with the most cloud cover is January (Cloud cover 76).
The months with the least cloud cover are July and August (Cloud cover 39).

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Average visibility in May
Summerville, PA

Average visibility in May - Summerville, PA
  • Average visibility in May: 5mi

The month with the highest visibility is April (6mi).
The month with the lowest visibility is February (4mi).

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