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 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
Princeton observes a slight ascent in average high-temperatures during May, adjusting from a pleasant 71.6°F (22°C) in April to a moderately hot 80.4°F (26.9°C). Despite the intense daytime heat, Princeton sustains a steady low-temperature average of 54.1°F (12.3°C) during May.Humidity
The average relative humidity in May is 50%.Rainfall
In Princeton, in May, it is raining for 4.7 days, with typically 0.35" (9mm) of accumulated precipitation. Throughout the year, there are 58.9 rainfall days, and 6.89" (175mm) of precipitation is accumulated.Daylight
The average length of the day in May in Princeton is 14h and 22min.On the first day of May in Princeton, sunrise is at 6:07 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 8:28 pm PDT.
Sunshine
In May, the average sunshine is 11h.UV index
The average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In May, the maximum UV index of 6 suggests these recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
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?
How much does it rain in May?
How many hours of daylight does Princeton have in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Princeton have in May?
What is the UV index reading in May in Princeton?
Average temperature in May
Princeton, CA
- Average high temperature in May: 80.4°F
The warmest month (with the highest average high temperature) is July (98.8°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in May: 54.1°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is December (42.1°F).
Average pressure in May
Princeton, CA
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Princeton, CA
- Average wind speed in May: 6.3mph
The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in May
Princeton, CA
- Average humidity in May: 50%
The month with the highest relative humidity is March (71%).
The month with the lowest relative humidity is September (36%).
Average rainfall in May
Princeton, CA
- Average rainfall in May: 0.35"
The wettest months (with the highest rainfall) are February and December (1.3").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in May
Princeton, CA
- Average rainfall days in May: 4.7 days
The month with the highest number of rainy days is March (10.4 days).
The month with the least rainy days is July (1 days).
Average daylight in May /
Average sunshine in May
Princeton, CA
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in May: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in May
Princeton, CA
- Average sunshine days in May: 25.4 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (19.7 days).
Average UV index in May
Princeton, CA
- Average UV index in May: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in May
Princeton, CA
- Average cloud cover in May: 20
The months with the most cloud cover are March and December (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in May
Princeton, 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).
Princeton, California, USA
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