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 is marked by an average high-temperature of a moderately hot 76.6°F (24.8°C), almost identical to the preceding month. Significant variation from daytime temperatures marks May, with the month recording a nightly average of 53.2°F (11.8°C).Humidity
February, March and May, with an average relative humidity of 53%, are the most humid months.Rainfall
In Alta Loma, during May, the rain falls for 4.2 days and regularly aggregates up to 0.28" (7mm) of precipitation. Throughout the year, there are 50.5 rainfall days, and 7.56" (192mm) of precipitation is accumulated.Daylight
In May, the average length of the day is 13h and 57min.On the first day of May, sunrise is at 6:00 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 7:56 pm PDT.
Sunshine
The average sunshine in May is 11.8h.UV index
In Alta Loma, the average daily maximum UV index in May is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index, 6 during May, leads to the following recommendations:
Deflect overexposure. Sun protection is a necessity. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Alta Loma in May?
What are the most humid months?
What is the average humidity in May?
How much does it rain in May?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
What is the UV index intensity in May?
Average temperature in May
Alta Loma, CA
- Average high temperature in May: 76.6°F
The warmest month (with the highest average high temperature) is August (91.2°F).
The month with the lowest average high temperature is December (61.3°F).
- Average low temperature in May: 53.2°F
The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is February (45.1°F).
Average pressure in May
Alta Loma, CA
- Average pressure in May: 29.9"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in May
Alta Loma, CA
- Average wind speed in May: 5.9mph
The windiest months (with the highest average wind speed) are April and May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in May
Alta Loma, CA
- Average humidity in May: 53%
The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).
Average rainfall in May
Alta Loma, CA
- Average rainfall in May: 0.28"
The wettest month (with the highest rainfall) is February (1.73").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in May
Alta Loma, CA
- Average rainfall days in May: 4.2 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.2 days).
Average daylight in May /
Average sunshine in May
Alta Loma, CA
- Average daylight in May: 14h and 0min
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 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 54min).
Average sunshine days in May
Alta Loma, CA
- Average sunshine days in May: 24.9 days
The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is February (21.4 days).
Average UV index in May
Alta Loma, CA
- Average UV index in May: 6
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in May
Alta Loma, CA
- Average cloud cover in May: 12
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in May
Alta Loma, 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).
Alta Loma, California, USA
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