June weather forecastCosta Mesa, CA
June
Weather in June
The first month of the summer, June, is a pleasant month in Costa Mesa, California, with an average temperature ranging between max 70.7°F (21.5°C) and min 58.6°F (14.8°C).Temperature
The transition into June marks the average high-temperature at a pleasant 70.7°F (21.5°C), differing minimally from May's 67.6°F (19.8°C). Costa Mesa's temperature in June lowers to a consistent average of 58.6°F (14.8°C) during the nights.Humidity
June is the most humid month in Costa Mesa, California, with an average relative humidity of 74%.Rainfall
The month with the least rainfall in Costa Mesa is June, when the rain falls for 1.6 days and typically collects 0.04" (1mm) of precipitation.Daylight
The month with the longest days is June, with an average of 14h and 24min of daylight.On the first day of the month, sunrise is at 5:42 am and sunset at 7:57 pm. On the last day of June, in Costa Mesa, sunrise is at 5:44 am and sunset at 8:06 pm PDT.
Sunshine
In Costa Mesa, the average sunshine in June is 11.7h.UV index
In June, the average daily maximum UV index in Costa Mesa is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: An average UV index of 5 in June transforms into this advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
Costa Mesa, CA
- Average high temperature in June: 70.7°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (62.4°F).
- Average low temperature in June: 58.6°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 (52.3°F).
Average pressure in June
Costa Mesa, CA
- Average pressure in June: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in June
Costa Mesa, CA
- Average wind speed in June: 5.8mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is October (5.2mph).
Average humidity in June
Costa Mesa, CA
- Average humidity in June: 74%
The month with the highest relative humidity is June (74%).
The month with the lowest relative humidity is November (59%).
Average rainfall in June
Costa Mesa, CA
- Average rainfall in June: 0.04"
The wettest month (with the highest rainfall) is December (0.79").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in June
Costa Mesa, CA
- Average rainfall days in June: 1.6 days
The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is June (1.6 days).
Average daylight in June /
Average sunshine in June
Costa Mesa, CA
- Average daylight in June: 14h and 24min
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 June: 11h and 42min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in June
Costa Mesa, CA
- Average sunshine days in June: 26.5 days
The month with the most sunshine days is June (26.5 days).
The month with the least sunshine days is February (20.5 days).
Average UV index in June
Costa Mesa, CA
- Average UV index in June: 5
The months with the highest UV index are 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 June
Costa Mesa, CA
- Average cloud cover in June: 17
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 8).
Average visibility in June
Costa Mesa, CA
- Average visibility in June: 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).
