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
As O'Brien transitions into May, the average high-temperature is observed to slightly rise from an enjoyable 62.4°F (16.9°C) in April to an agreeable 71.2°F (21.8°C). O'Brien's nights during May are marked by a pronounced drop from daytime temperatures, experiencing an average low of 46°F (7.8°C).Humidity
The average relative humidity in May is 58%.Rainfall
In May, the rain falls for 10.3 days. Throughout May, 1.89" (48mm) of precipitation is accumulated. In O'Brien, during the entire year, the rain falls for 102.3 days and collects up to 24.21" (615mm) of precipitation.Snowfall
In O'Brien, snow does not fall in April through October.Daylight
The average length of the day in May is 14h and 29min.On the first day of May, sunrise is at 6:06 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:34 pm PDT.
Sunshine
The average sunshine in May is 11h.UV index
The average daily maximum UV index in May in O'Brien is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 in May translates into these instructions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
How much does it rain in May?
When it does not snow?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How many hours of sunshine does O'Brien have in May?
What is the UV index reading in May?
Average temperature in May
O'Brien, CA
- Average high temperature in May: 71.2°F
The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is December (47.8°F).
- Average low temperature in May: 46°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).
Average pressure in May
O'Brien, CA
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in May
O'Brien, CA
- Average wind speed in May: 5.1mph
The windiest months (with the highest average wind speed) are March and October (5.3mph).
The calmest months (with the lowest average wind speed) are August and November (4.5mph).
Average humidity in May
O'Brien, CA
- Average humidity in May: 58%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is August (37%).
Average rainfall in May
O'Brien, CA
- Average rainfall in May: 1.89"
The wettest month (with the highest rainfall) is March (4.8").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in May
O'Brien, CA
- Average rainfall days in May: 10.3 days
The month with the highest number of rainy days is March (16.8 days).
The month with the least rainy days is August (1.7 days).
Average snowfall in May
O'Brien, CA
- Average snowfall in May: 0"
The month with the highest snowfall is November (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
O'Brien, CA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
O'Brien, CA
- 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: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in May
O'Brien, CA
- Average sunshine days in May: 18.3 days
The month with the most sunshine days is August (27.1 days).
The month with the least sunshine days is March (11.8 days).
Average UV index in May
O'Brien, CA
- Average UV index in May: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in May
O'Brien, CA
- Average cloud cover in May: 23
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in May
O'Brien, CA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).
O'Brien, California, USA
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