May weather forecast
Shelly, PA

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Weather in May

The last month of the spring, May, is a pleasant month in Shelly, Pennsylvania, with an average temperature varying between 51.4°F (10.8°C) and 70.3°F (21.3°C).

Temperature

Shelly's weather shows a temperature rise with the arrival of May, moving from a refreshing 59.7°F (15.4°C) in April to an agreeable 70.3°F (21.3°C). During May, Shelly sees a mean low-temperature of 51.4°F (10.8°C).

Humidity

In May, the average relative humidity is 78%.

Rainfall

The wettest months are May and July, with an average 3.07" (78mm) of rainfall.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Shelly. During 0.1 snowfall days, in May, Shelly aggregates 0.2" (5mm) of snow. Throughout the year, in Shelly, there are 29.3 snowfall days, and 16.57" (421mm) of snow is accumulated.

Daylight

The average length of the day in May is 14h and 27min.
On the first day of May, sunrise is at 5:59 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 8:25 pm EDT.

Sunshine

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

UV index

The months with the highest UV index are May through July, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 6 in May transforms into the following instructions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Updated: Jul 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in May in Shelly?

The average high-temperature, in May, in Shelly, is 70.3°F (21.3°C), while the average low-temperature is 51.4°F (10.8°C).

What is the average humidity in May?

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

What is the wettest month?

The months with the most rainfall are May and July, with an average 3.07" (78mm) of precipitation.

How many days does it rain in May?

In May, the rain falls for 17 days. Throughout May, 3.07" (78mm) of precipitation is accumulated.

What is the last month it snows?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Shelly aggregates 0.2" (5mm) of snow.

What is the average length of the day in May?

In Shelly, the average day length in May is 14h and 27min.

When is the sunrise / sunset in May in Shelly?

On the first day of May in Shelly, sunrise is at 5:59 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 8:25 pm EDT.

How long on average sun shines in May?

In May, the average sunshine duration is 8.3h.

What are the months with the highest UV index?

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

What is the UV index reading in May?

The average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.
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
Shelly, PA

Average temperature in May - Shelly, PA
  • Average high temperature in May: 70.3°F

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in May: 51.4°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).

Average pressure in May
Shelly, PA

Average pressure in May - Shelly, 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
Shelly, PA

Average wind speed in May - Shelly, PA
  • Average wind speed in May: 6.3mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in May
Shelly, PA

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

The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (75%).

Average rainfall in May
Shelly, PA

Average rainfall in May - Shelly, PA
  • Average rainfall in May: 3.07"

The wettest months (with the highest rainfall) are May and July (3.07").
The driest month (with the least rainfall) is September (1.89").

Average rainfall days in May
Shelly, PA

Average rainfall days in May - Shelly, PA
  • Average rainfall days in May: 17 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (8.3 days).

Average snowfall in May
Shelly, PA

Average snowfall in May - Shelly, PA
  • Average snowfall in May: 0.2"

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

Average snowfall days in May
Shelly, PA

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

The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in May / Average sunshine in May - Shelly, 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 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 30min).

Average sunshine days in May
Shelly, PA

Average sunshine days in May - Shelly, PA
  • Average sunshine days in May: 12.7 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (11.8 days).

Average UV index in May
Shelly, PA

Average UV index in May - Shelly, PA
  • Average UV index in May: 6

The months with the highest UV index are May, June and July (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
Shelly, PA

Average cloud cover in May - Shelly, PA
  • Average cloud cover in May: 48

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in May
Shelly, PA

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

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

Shelly, Pennsylvania, USA

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