May weather forecastSimi Valley, CA
May
Weather in May
The last month of the spring, May, is an agreeable month in Simi Valley, California, with temperature in the range of an average high of 70.2°F (21.2°C) and an average low of 53.4°F (11.9°C).Temperature
The start of May marks an average high-temperature of a pleasant 70.2°F (21.2°C), hardly distinguishable from the conditions in April. Simi Valley, in May, experiences an average temperature of 53.4°F (11.9°C) at night.Humidity
In Simi Valley, the average relative humidity in May is 61%.Rainfall
In Simi Valley, in May, it is raining for 4.5 days, with typically 0.35" (9mm) of accumulated precipitation. Throughout the year, there are 53.7 rainfall days, and 9.61" (244mm) of precipitation is accumulated.Daylight
The average length of the day in May in Simi Valley is 13h and 58min.On the first day of May, sunrise is at 6:04 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:01 pm PDT.
Sunshine
In Simi Valley, the average sunshine in May is 11.5h.UV index
In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A typical high UV index of 5 in May suggests the following recommendations:
Exercise prevention - Warding off sunburn is urged. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Simi Valley, CA
- Average high temperature in May: 70.2°F
The warmest month (with the highest average high temperature) is August (82.2°F).
The month with the lowest average high temperature is December (60.1°F).
- Average low temperature in May: 53.4°F
The month with the highest average low temperature is August (63.1°F).
The coldest month (with the lowest average low temperature) is December (46.4°F).
Average pressure in May
Simi Valley, CA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are June and September (29.9"Hg).
Average wind speed in May
Simi Valley, CA
- Average wind speed in May: 5.5mph
The windiest month (with the highest average wind speed) is December (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in May
Simi Valley, CA
- Average humidity in May: 61%
The month with the highest relative humidity is June (62%).
The month with the lowest relative humidity is November (50%).
Average rainfall in May
Simi Valley, CA
- Average rainfall in May: 0.35"
The wettest month (with the highest rainfall) is February (1.93").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in May
Simi Valley, CA
- Average rainfall days in May: 4.5 days
The month with the highest number of rainy days is March (8 days).
The months with the least rainy days are June and August (1.5 days).
Average daylight in May /
Average sunshine in May
Simi Valley, 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 30min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in May
Simi Valley, CA
- Average sunshine days in May: 23.2 days
The month with the most sunshine days is August (25.4 days).
The month with the least sunshine days is February (20.9 days).
Average UV index in May
Simi Valley, CA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in May
Simi Valley, CA
- Average cloud cover in May: 14
The month with the most cloud cover is March (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in May
Simi Valley, 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).
