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
In May, the average high-temperature increases from a refreshing 58.1°F (14.5°C) in April to a pleasant 70.2°F (21.2°C). Petrolia experiences a consistent average temperature of 49.3°F (9.6°C) throughout the nights in May.Humidity
In May, the average relative humidity is 79%.Rainfall
In Petrolia, in May, during 15.8 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. In Petrolia, during the entire year, the rain falls for 140.7 days and collects up to 15.43" (392mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. May is the last month it regularly snows. During 0.5 snowfall days, in May, Petrolia aggregates 0.08" (2mm) of snow. In Petrolia, during the entire year, snow falls for 48.2 days and aggregates up to 6.85" (174mm) of snow.Daylight
In Petrolia, the average length of the day in May is 14h and 29min.On the first day of the month, sunrise is at 6:15 am and sunset at 8:16 pm. On the last day of May, sunrise is at 5:48 am and sunset at 8:44 pm EDT.
Sunshine
In Petrolia, the average sunshine in May is 8.2h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 5 during May translates into these guidelines:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Petrolia in May?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
What time are sunrise and sunset in May in Petrolia?
How many hours of sunshine does Petrolia have in May?
What is the month with the highest UV index?
How high is the UV index in May?
Average temperature in May
Petrolia, PA
- Average high temperature in May: 70.2°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in May: 49.3°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in May
Petrolia, 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 (29.94"Hg).
Average wind speed in May
Petrolia, PA
- Average wind speed in May: 6.5mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in May
Petrolia, PA
- Average humidity in May: 79%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April, June, July and August (78%).
Average rainfall in May
Petrolia, PA
- Average rainfall in May: 1.54"
The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is November (0.87").
Average rainfall days in May
Petrolia, PA
- Average rainfall days in May: 15.8 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in May
Petrolia, PA
- Average snowfall in May: 0.08"
The month with the highest snowfall is January (1.93").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Petrolia, PA
- Average snowfall days in May: 0.5 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Petrolia, 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 1min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in May
Petrolia, PA
- Average sunshine days in May: 12.4 days
The month with the most sunshine days is December (17.1 days).
The month with the least sunshine days is July (12.2 days).
Average UV index in May
Petrolia, PA
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Petrolia, PA
- Average cloud cover in May: 49
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in May
Petrolia, 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).
Petrolia, Pennsylvania, USA
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