Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The shift into May is characterized by a rise in the average high-temperature, transitioning from April's moderate 58.8°F (14.9°C) to a pleasant 71.1°F (21.7°C). In the month of May, the temperature generally rests at an average low of 50°F (10°C).Humidity
The average relative humidity in May is 78%.Rainfall
The month with the most rainfall is May, when the rain falls for 17.9 days and typically aggregates up to 2.8" (71mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.4 snowfall days, in May, Butler aggregates 0.16" (4mm) of snow. Throughout the year, there are 58.1 snowfall days, and 14.41" (366mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 29min.On the first day of the month, sunrise is at 6:16 am and sunset at 8:16 pm. On the last day of May, sunrise is at 5:50 am and sunset at 8:44 pm EDT.
Sunshine
In Butler, the average sunshine in May is 8.6h.UV index
The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In May, the maximum UV index of 5 suggests these recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
What is the rainiest month?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Butler have in May?
When are sunrise and sunset in May?
How many hours of sunshine does Butler have in May?
How high is the UV index in May?
Average temperature in May
Butler, PA
- Average high temperature in May: 71.1°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in May: 50°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in May
Butler, PA
- Average pressure in May: 29.99"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Butler, PA
- Average wind speed in May: 6.2mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).
Average humidity in May
Butler, PA
- Average humidity in May: 78%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in May
Butler, PA
- Average rainfall in May: 2.8"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is November (1.61").
Average rainfall days in May
Butler, PA
- Average rainfall days in May: 17.9 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in May
Butler, PA
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (3.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Butler, PA
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is January (17 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Butler, PA
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in May
Butler, PA
- Average sunshine days in May: 10.6 days
The month with the most sunshine days is November (15.4 days).
The month with the least sunshine days is February (9 days).
Average UV index in May
Butler, PA
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Butler, PA
- Average cloud cover in May: 46
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in May
Butler, PA
- Average visibility in May: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
Butler, Pennsylvania, USA
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