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
The beginning of May records an average high-temperature of a still agreeable 70.9°F (21.6°C), almost echoing the conditions of the previous month. Throughout May, Portola Hills witnesses a consistent average low-temperature of 55.2°F (12.9°C).Humidity
The months with the highest humidity are May and June, with an average relative humidity of 69%.Rainfall
In Portola Hills, in May, during 6.2 rainfall days, 0.39" (10mm) of precipitation is typically accumulated. In Portola Hills, during the entire year, the rain falls for 65.4 days and collects up to 9.17" (233mm) of precipitation.Daylight
In May, the average length of the day in Portola Hills, California, is 13h and 55min.On the first day of May in Portola Hills, sunrise is at 6:00 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 7:55 pm PDT.
Sunshine
In Portola Hills, the average sunshine in May is 11.1h.UV index
In Portola Hills, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 5 during May translates into the following guidance:
Take precautions - Protection against sun damage is advised. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Frequently asked questions
What are May temperatures in Portola Hills?
What is the most humid month in Portola Hills?
What is the average humidity in May in Portola Hills?
How many days does it rain in May in Portola Hills?
What is the average length of the day in May in Portola Hills?
When are sunrise and sunset in May in Portola Hills?
How long on average sun shines in May in Portola Hills?
What is the UV index reading in May in Portola Hills?
Average temperature in May
Portola Hills, CA
- Average high temperature in May: 70.9°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (63.1°F).
- Average low temperature in May: 55.2°F
The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).
Average pressure in May
Portola Hills, CA
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed in May
Portola Hills, CA
- Average wind speed in May: 5.7mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest months (with the lowest average wind speed) are August and September (4.5mph).
Average humidity in May
Portola Hills, CA
- Average humidity in May: 69%
The months with the highest relative humidity are May and June (69%).
The month with the lowest relative humidity is November (55%).
Average rainfall in May
Portola Hills, CA
- Average rainfall in May: 0.39"
The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in May
Portola Hills, CA
- Average rainfall days in May: 6.2 days
The month with the highest number of rainy days is March (8.1 days).
The month with the least rainy days is June (2 days).
Average daylight in May /
Average sunshine in May
Portola Hills, CA
- Average daylight in May: 13h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in May: 11h and 1min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in May
Portola Hills, CA
- Average sunshine days in May: 19.3 days
The months with the most sunshine days are January and October (24.2 days).
The month with the least sunshine days is May (19.3 days).
Average UV index in May
Portola Hills, CA
- Average UV index in May: 5
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in May
Portola Hills, CA
- Average cloud cover in May: 20
The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in May
Portola Hills, 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).
Portola Hills, California, USA
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