May weather forecastLake Forest, CA
May
Weather in May
May, the last month of the spring in Lake Forest, is also an agreeable month, with an average temperature varying between 55.2°F (12.9°C) and 70.9°F (21.6°C).Temperature
The shift from April to May is characterized by an average high-temperature of a still pleasant 70.9°F (21.6°C), not significantly different from the 69.3°F (20.7°C) of April. During the nights in May, an average low-temperature of 55.2°F (12.9°C) is observed.Humidity
May and June, with an average relative humidity of 69%, are the most humid months.Rainfall
In Lake Forest, in May, it is raining for 6.2 days, with typically 0.39" (10mm) of accumulated precipitation. Throughout the year, there are 65.4 rainfall days, and 9.17" (233mm) of precipitation is accumulated.Daylight
In Lake Forest, the average length of the day in May is 13h and 55min.On the first day of May, sunrise is at 6:01 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 May, the average sunshine is 11.1h.UV index
In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 5 during May morphs into the following directions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Lake Forest, 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
Lake Forest, 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
Lake Forest, 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
Lake Forest, 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
Lake Forest, 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
Lake Forest, 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
Lake Forest, CA
- Average daylight in May: 13h and 54min
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 6min
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
Lake Forest, 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
Lake Forest, 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
Lake Forest, 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
Lake Forest, 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).
