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
May denotes a minimal variation in the average high-temperature to a still pleasant 70.3°F (21.3°C) from April's 68.9°F (20.5°C). Westmont, during the nights of May, experiences an average temperature drop to a refreshing 56.8°F (13.8°C).Humidity
The average relative humidity in May is 67%.Rainfall
In Westmont, in May, it is raining for 4.4 days, with typically 0.24" (6mm) of accumulated precipitation. Throughout the year, there are 47.6 rainfall days, and 7.24" (184mm) of precipitation is accumulated.Daylight
In May, the average length of the day is 13h and 56min.On the first day of the month, sunrise is at 6:03 am and sunset at 7:37 pm. On the last day of May, sunrise is at 5:43 am and sunset at 7:58 pm PDT.
Sunshine
The average sunshine in May is 11.1h.UV index
In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 5 during May translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
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 many days does it rain in May?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Westmont have in May?
What is the UV index intensity in May?
Average temperature in May
Westmont, CA
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (64°F).
- Average low temperature in May: 56.8°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (51.1°F).
Average pressure in May
Westmont, CA
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Westmont, CA
- Average wind speed in May: 6mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is September (4.9mph).
Average humidity in May
Westmont, CA
- Average humidity in May: 67%
The month with the highest relative humidity is June (70%).
The month with the lowest relative humidity is November (54%).
Average rainfall in May
Westmont, CA
- Average rainfall in May: 0.24"
The wettest month (with the highest rainfall) is January (1.42").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in May
Westmont, CA
- Average rainfall days in May: 4.4 days
The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.7 days).
Average daylight in May /
Average sunshine in May
Westmont, 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: 9h and 54min).
- Average sunshine in May: 11h and 1min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in May
Westmont, CA
- Average sunshine days in May: 23.6 days
The month with the most sunshine days is October (25.5 days).
The month with the least sunshine days is June (21.4 days).
Average UV index in May
Westmont, 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, November and December (UV index 4).
Average cloud cover in May
Westmont, CA
- Average cloud cover in May: 19
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in May
Westmont, 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).
Westmont, California, USA
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