May weather forecastPetrolia, CA
May
Weather in May
The last month of the spring, May, is an enjoyable month in Petrolia, California, with an average temperature ranging between min 44.1°F (6.7°C) and max 63°F (17.2°C).Temperature
With May's arrival, Petrolia notes an average high-temperature of an enjoyable 63°F (17.2°C), closely following the trend of the preceding month. May's nights in Petrolia observe an average temperature of 44.1°F (6.7°C).Humidity
In Petrolia, the average relative humidity in May is 79%.Rainfall
In Petrolia, in May, during 8.1 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, in Petrolia, California, there are 110.9 rainfall days, and 28.27" (718mm) of precipitation is accumulated.Snowfall
In Petrolia, California, snow does not fall in January, March through December.Daylight
In Petrolia, the average length of the day in May is 14h and 26min.On the first day of May in Petrolia, sunrise is at 6:15 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:40 pm PDT.
Sunshine
In Petrolia, the average sunshine in May is 9.9h.UV index
The average daily maximum UV index in May in Petrolia is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: A daily maximum UV index of 4 in May translates into the following instructions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Petrolia, CA
- Average high temperature in May: 63°F
The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is December (52.9°F).
- Average low temperature in May: 44.1°F
The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is February (39.7°F).
Average pressure in May
Petrolia, CA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are August and September (29.96"Hg).
Average wind speed in May
Petrolia, CA
- Average wind speed in May: 7.2mph
The windiest month (with the highest average wind speed) is June (7.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in May
Petrolia, CA
- Average humidity in May: 79%
The month with the highest relative humidity is March (83%).
The month with the lowest relative humidity is September (73%).
Average rainfall in May
Petrolia, CA
- Average rainfall in May: 1.69"
The wettest month (with the highest rainfall) is December (4.96").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in May
Petrolia, CA
- Average rainfall days in May: 8.1 days
The month with the highest number of rainy days is March (17.3 days).
The months with the least rainy days are July and August (1.8 days).
Average snowfall in May
Petrolia, CA
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in May
Petrolia, CA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in May /
Average sunshine in May
Petrolia, CA
- Average daylight in May: 14h and 24min
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: 9h and 54min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in May
Petrolia, CA
- Average sunshine days in May: 21.1 days
The month with the most sunshine days is July (28.5 days).
The month with the least sunshine days is March (11.9 days).
Average UV index in May
Petrolia, CA
- Average UV index in May: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in May
Petrolia, CA
- Average cloud cover in May: 37
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in May
Petrolia, CA
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, September, October, November and December (6mi).
The months with the lowest visibility are May, July and August (5mi).
