May weather forecast
Perkiomen Junction, PA

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Weather in May

May, the last month of the spring in Perkiomen Junction, is an agreeable month, with an average temperature ranging between min 53.1°F (11.7°C) and max 71.2°F (21.8°C).

Temperature

The start of May brings a rise in the average high-temperature, moving from a mild 60.6°F (15.9°C) in April to an agreeable 71.2°F (21.8°C). Perkiomen Junction throughout May, experiences an average nighttime temperature of 53.1°F (11.7°C).

Humidity

The average relative humidity in May is 78%.

Rainfall

In Perkiomen Junction, during May, the rain falls for 15.3 days and regularly aggregates up to 1.5" (38mm) of precipitation. In Perkiomen Junction, during the entire year, the rain falls for 132.3 days and collects up to 13.98" (355mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Perkiomen Junction, the average length of the day in May is 14h and 25min.
On the first day of the month, sunrise is at 6:00 am and sunset at 7:57 pm. On the last day of May, sunrise is at 5:34 am and sunset at 8:24 pm EDT.

Sunshine

In Perkiomen Junction, Pennsylvania, the average sunshine in May is 8.3h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high UV index of 6 in May translates into the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Updated: Jul 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in May?

During May, Perkiomen Junction experiences an average high-temperature of 71.2°F (21.8°C) and a low-temperature of 53.1°F (11.7°C).

What is the average humidity in May?

In May, the average relative humidity is 78%.

How much does it rain in May?

In Perkiomen Junction, in May, it is raining for 15.3 days, with typically 1.5" (38mm) of accumulated precipitation.

When it does not snow?

April through October are months without snowfall.

What is the average length of the day in May?

The average day length in May is 14h and 25min.

What time are sunrise and sunset in May?

On the first day of May, sunrise is at 6:00 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 5:34 am and sunset at 8:24 pm EDT.

How long on average sun shines in May?

In Perkiomen Junction, the average sunshine duration in May is 8.3h.

What is the month with the highest UV index?

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 May?

In May, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health threat 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 May
Perkiomen Junction, PA

Average temperature in May - Perkiomen Junction, PA
  • Average high temperature in May: 71.2°F

The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in May: 53.1°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

Average pressure in May
Perkiomen Junction, PA

Average pressure in May - Perkiomen Junction, PA
  • Average pressure in May: 30.01"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).

Average wind speed in May
Perkiomen Junction, PA

Average wind speed in May - Perkiomen Junction, PA
  • Average wind speed in May: 6.5mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in May
Perkiomen Junction, PA

Average humidity in May - Perkiomen Junction, PA
  • Average humidity in May: 78%

The month with the highest relative humidity is February (80%).
The months with the lowest relative humidity are April and July (74%).

Average rainfall in May
Perkiomen Junction, PA

Average rainfall in May - Perkiomen Junction, PA
  • Average rainfall in May: 1.5"

The wettest month (with the highest rainfall) is August (1.77").
The driest month (with the least rainfall) is February (0.75").

Average rainfall days in May
Perkiomen Junction, PA

Average rainfall days in May - Perkiomen Junction, PA
  • Average rainfall days in May: 15.3 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (6.9 days).

Average snowfall in May
Perkiomen Junction, PA

Average snowfall in May - Perkiomen Junction, PA
  • Average snowfall in May: 0"

The months with the highest snowfall are January and February (0.59").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in May
Perkiomen Junction, PA

Average snowfall days in May - Perkiomen Junction, PA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (4.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in May /
Average sunshine in May
Perkiomen Junction, PA

Average daylight in May / Average sunshine in May - Perkiomen Junction, 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 24min).

  • Average sunshine in May: 8h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in May
Perkiomen Junction, PA

Average sunshine days in May - Perkiomen Junction, PA
  • Average sunshine days in May: 13.1 days

The month with the most sunshine days is January (20.7 days).
The month with the least sunshine days is June (12.8 days).

Average UV index in May
Perkiomen Junction, PA

Average UV index in May - Perkiomen Junction, PA
  • Average UV index in May: 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, March, November and December (UV index 2).

Average cloud cover in May
Perkiomen Junction, PA

Average cloud cover in May - Perkiomen Junction, PA
  • Average cloud cover in May: 48

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in May
Perkiomen Junction, PA

Average visibility in May - Perkiomen Junction, PA
  • Average visibility in May: 5mi

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

Perkiomen Junction, Pennsylvania, USA

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