Costa Mesa, CA weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Costa Mesa now
Loading the National Weather Service forecast…
Costa Mesa weather by the hour
Costa Mesa weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Costa Mesa.
This week in Costa Mesa
Sunrise, sunset and moon in Costa Mesa
What is the weather usually like in Costa Mesa?
Köppen climate classification, calculated from the 1991–2020 normals
- Augustwarmest month · 80°F average high
- Decembercoldest month · 48°F average low
- 11.2 inprecipitation per year · 284 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Costa Mesa: June–July and September–October, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station SANTA ANA JOHN WAYNE AP, CA US (USW00093184), adjusted for the elevation of Costa Mesa.
Costa Mesa weather month by month
Sunrise and sunset in Costa Mesa through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 6:54 AM | 5:07 PM | 10 h 13 min |
| February | 6:34 AM | 5:37 PM | 11 h 3 min |
| March | 7:00 AM | 7:00 PM | 12 h 0 min |
| April | 6:19 AM | 7:23 PM | 13 h 4 min |
| May | 5:49 AM | 7:46 PM | 13 h 57 min |
| June | 5:39 AM | 8:05 PM | 14 h 25 min |
| July | 5:51 AM | 8:04 PM | 14 h 12 min |
| August | 6:12 AM | 7:39 PM | 13 h 26 min |
| September | 6:34 AM | 6:59 PM | 12 h 25 min |
| October | 6:55 AM | 6:19 PM | 11 h 23 min |
| November | 6:22 AM | 4:50 PM | 10 h 27 min |
| December | 6:47 AM | 4:46 PM | 9 h 58 min |
Times for the 15th of each month, local time (America/Los Angeles).
What is the weather like in Costa Mesa?
Costa Mesa has a hot semi-arid climate. The warmest month is August, with an average high of 80°F (27°C), and the coldest is December, with average lows of 48°F (9°C).
It gets about 11.2 inches (284 mm) of precipitation a year. The wettest month is February and the driest is June.
The best time to visit Costa Mesa is June–July and September–October. At 98 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Costa Mesa
Weather in towns near Costa Mesa
Questions about the weather in Costa Mesa
What is the hottest month in Costa Mesa?
August, with an average high of 80°F (27°C).
What is the coldest month in Costa Mesa?
December, with an average low of 48°F (9°C).
How much does it rain in Costa Mesa?
About 11.2 inches (284 mm) a year; the wettest month is February.
Does it snow in Costa Mesa?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Costa Mesa?
June–July and September–October, when temperatures are most pleasant and rainy days are fewer.
What climate does Costa Mesa have?
Hot semi-arid (Köppen BSh).
What is the weather like in Costa Mesa in November?
Highs average 72°F and lows 53°F, with about 0.8 inches of precipitation.
What time is sunrise in Costa Mesa?
Around 6:22 AM in mid-November, and sunset around 4:50 PM. Today’s exact times are shown above.
Where does this Costa Mesa weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Costa Mesa.
Last updated: