May weather forecast
Monroeville, PA

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Weather in May

May, the last month of the spring in Monroeville, is an agreeable month, with an average temperature fluctuating between 71.8°F (22.1°C) and 51.1°F (10.6°C).

Temperature

May comes with an increase, with the average high-temperature moving from a refreshing 60.1°F (15.6°C) in April to an agreeable 71.8°F (22.1°C). During May, Monroeville experiences a consistent low-temperature average of 51.1°F (10.6°C).

Humidity

In May, the average relative humidity in Monroeville is 78%.

Rainfall

The month with the most rainfall is May, when the rain falls for 18.2 days and typically aggregates up to 2.56" (65mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Monroeville. During 0.1 snowfall days, in May, Monroeville aggregates 0.04" (1mm) of snow. In Monroeville, Pennsylvania, during the entire year, snow falls for 35.4 days and aggregates up to 10.35" (263mm) of snow.

Daylight

In Monroeville, the average length of the day in May is 14h and 26min.
On the first day of May, sunrise is at 6:17 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 8:42 pm EDT.

Sunshine

In Monroeville, the average sunshine in May is 8.8h.

UV index

The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: An average UV index of 5 in May transforms into this advice:
Undertake precautions - It is suggested to shield oneself from sunburn. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
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Frequently asked questions

What are the temperatures in Monroeville in May?

The high-temperature in Monroeville, Pennsylvania, during May is 71.8°F (22.1°C) and the low-temperature is 51.1°F (10.6°C).

What is the average humidity in May in Monroeville?

The average relative humidity in May in Monroeville, Pennsylvania, is 78%.

What is the wettest month in Monroeville?

May is the month with the most rainfall in Monroeville. Rain falls for 18.2 days and accumulates 2.56" (65mm) of precipitation.

How many days does it rain in May in Monroeville?

In Monroeville, Pennsylvania, in May, during 18.2 rainfall days, 2.56" (65mm) of precipitation is typically accumulated.

What is the last month it snows in Monroeville?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Monroeville aggregates 0.04" (1mm) of snow.

How many hours of daylight does Monroeville have in May?

In May, the average day length in Monroeville, Pennsylvania, is 14h and 26min.

When are sunrise and sunset in May in Monroeville?

On the first day of May in Monroeville, Pennsylvania, sunrise is at 6:17 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 8:42 pm EDT.

How long on average sun shines in May in Monroeville?

The average sunshine duration in May in Monroeville is 8.8h.

How high is the UV index in May in Monroeville?

The average daily maximum UV index in May in Monroeville is 5. A UV Index reading of 3 to 5 represents a moderate 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 May
Monroeville, PA

Average temperature in May - Monroeville, PA
  • Average high temperature in May: 71.8°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.1°F).

  • Average low temperature in May: 51.1°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

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Average pressure in May
Monroeville, PA

Average pressure in May - Monroeville, PA
  • Average pressure in May: 30"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in May
Monroeville, PA

Average wind speed in May - Monroeville, PA
  • Average wind speed in May: 6.1mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in May
Monroeville, PA

Average humidity in May - Monroeville, PA
  • Average humidity in May: 78%

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (76%).

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Average rainfall in May
Monroeville, PA

Average rainfall in May - Monroeville, PA
  • Average rainfall in May: 2.56"

The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is November (1.06").

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Average rainfall days in May
Monroeville, PA

Average rainfall days in May - Monroeville, PA
  • Average rainfall days in May: 18.2 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (7.7 days).

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Average snowfall in May
Monroeville, PA

Average snowfall in May - Monroeville, PA
  • Average snowfall in May: 0.04"

The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Monroeville, PA

Average snowfall days in May - Monroeville, PA
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (9.7 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
Monroeville, PA

Average daylight in May / Average sunshine in May - Monroeville, PA
  • Average daylight in May: 14h and 2min

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 18min).

  • Average sunshine in May: 8h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).

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Average sunshine days in May
Monroeville, PA

Average sunshine days in May - Monroeville, PA
  • Average sunshine days in May: 10.1 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (10.1 days).

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Average UV index in May
Monroeville, PA

Average UV index in May - Monroeville, PA
  • Average UV index in May: 5

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in May
Monroeville, PA

Average cloud cover in May - Monroeville, PA
  • Average cloud cover in May: 44

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in May
Monroeville, PA

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

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

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Monroeville, Pennsylvania, USA

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