May weather forecastPiedmont, CA
May
Weather in May
The last month of the spring, May, is a pleasant month in Piedmont, California, with an average temperature varying between 50.5°F (10.3°C) and 68°F (20°C).Temperature
Piedmont marks the onset of May with an average high-temperature of a pleasant 68°F (20°C), subtly divergent from April's 65.3°F (18.5°C). In the month of May, an average of 50.5°F (10.3°C) marks the low-temperature in Piedmont.Humidity
In May, the average relative humidity is 70%.Rainfall
In Piedmont, during May, the rain falls for 4 days and regularly aggregates up to 0.28" (7mm) of precipitation. Throughout the year, there are 55.6 rainfall days, and 5.24" (133mm) of precipitation is accumulated.Daylight
In Piedmont, the average length of the day in May is 14h and 14min.On the first day of May, sunrise is at 6:11 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:25 pm PDT.
Sunshine
In Piedmont, the average sunshine in May is 10.7h.UV index
The months with the highest UV index are April through September, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: An average UV index of 5 in May transforms into this advice:
Heed the precautions - Suggestions to avoid sunburn are made. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Piedmont, CA
- Average high temperature in May: 68°F
The warmest month (with the highest average high temperature) is September (76.6°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in May: 50.5°F
The month with the highest average low temperature is September (56.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure in May
Piedmont, CA
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in May
Piedmont, CA
- Average wind speed in May: 7.3mph
The windiest month (with the highest average wind speed) is May (7.3mph).
The calmest month (with the lowest average wind speed) is November (5mph).
Average humidity in May
Piedmont, CA
- Average humidity in May: 70%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (64%).
Average rainfall in May
Piedmont, CA
- Average rainfall in May: 0.28"
The wettest month (with the highest rainfall) is February (1.1").
The driest months (with the least rainfall) are June, July, August and September (0.08").
Average rainfall days in May
Piedmont, CA
- Average rainfall days in May: 4 days
The month with the highest number of rainy days is March (8.7 days).
The month with the least rainy days is August (1.5 days).
Average daylight in May /
Average sunshine in May
Piedmont, CA
- Average daylight in May: 14h and 12min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in May: 10h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in May
Piedmont, CA
- Average sunshine days in May: 23.1 days
The month with the most sunshine days is October (26 days).
The month with the least sunshine days is February (20.5 days).
Average UV index in May
Piedmont, CA
- Average UV index in May: 5
The months with the highest UV index are April, May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in May
Piedmont, CA
- Average cloud cover in May: 25
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in May
Piedmont, CA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
