Costa Mesa, CA weather in April
In April, Costa Mesa sees highs around 73°F and lows around 54°F: mild and dry. Expect about 3 wet days. Great for outdoor plans.
- Normal high
- 73°F
- Normal low
- 54°F
- Wet days
- 3
- 0.6 in total
- Muggy days
- 0
- dew point 65°F+
How April changes from start to finish
| April 1 | April 30 | |
|---|---|---|
| Normal high | 72°F | 74°F |
| Normal low | 53°F | 56°F |
| Chance of a wet day | 11% | 7% |
| Sunrise / sunset | 6:39 am / 7:11 pm | 6:03 am / 7:33 pm |
| Daylight | 12.6 h | 13.5 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical April day
- 6 am56°Fdew point 49°F
- 9 am64°Fdew point 49°F
- Noon66°Fdew point 50°F
- 3 pm65°Fdew point 50°F
- 6 pm61°Fdew point 50°F
- 9 pm59°Fdew point 50°F
NOAA hourly normals (local standard time) from Los Angeles Intl Airport (34 mi away); average wind 9 mph; clear or few clouds in 43% of daytime hours, mostly cloudy or overcast in 33%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F22 of 30
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph7 of 30
- Hot dayshigh 90°F or more1 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow3 of 30
- Notable rainat least 0.10 in1 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per April, counted from daily records for each year 1991-2020.
Rain in April
Normal precipitation is 0.6 in; a dry April brings about 0.05 in and a wet one about 1.0 in (25th and 75th percentiles). Days with half an inch or more are rare.
How April varies from year to year
- Warmest April, 1991-20202008: average high 79°F
- Coolest April1999: average high 70°F
- Wettest April2020: 2.9 in
- Driest April1993: no measurable precipitation
- Highest reading103°F (April 20, 2009)
- Lowest reading39°F (April 2, 1999)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
April compared with March and May
| March | April | May | |
|---|---|---|---|
| Normal high | 71°F | 73°F | 75°F |
| Normal low | 52°F | 54°F | 58°F |
| Wet days | 5 | 3 | 2 |
| Comfortable days | 23 | 22 | 25 |
| Daylight | 12.0 h | 13.0 h | 13.9 h |
Highs change by +2°F from March and +2°F into May.
Nearby alternatives in April
- Warmer: Palm Springs, CA80 mi · high 87°F · 1 wet day
- Cooler: Torrance, CA28 mi · high 68°F · 3 wet days
How Costa Mesa ranks in April
- Normal high135th warmest of 378 cities; 25th of 60 in California
- Wet days27th driest of 378
- Comfortable days3rd most of 340
Heating and cooling
April has 79 heating degree days and 40 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Costa Mesa in April?
The normal high is 73°F and the normal low is 54°F. From 1991 to 2020 the hottest April reading was 103°F (most recently on April 20, 2009).
Does it rain a lot in Costa Mesa in April?
About 3 days in April have at least 0.01 in of precipitation, and the normal total is 0.6 in. The wettest April in 1991-2020 was in 2020 (2.9 in); the driest was in 1993, with no measurable precipitation.
Is April a good time to visit Costa Mesa?
April ranks 2nd of 12 months on our comfort score for Costa Mesa (83 out of 100). It has about 22 comfortable days and about 1 day at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature: Santa Ana Fire Stn (USC00047888), 7.7 mi NNE of the city center, 135 ft . NOAA normals and daily records, 1991-2020.
- Rain, snowfall and snow depth: Newport Beach Harbor (USC00046175), 3.3 mi SE of the city center, 10 ft (90 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Santa Ana John Wayne Airport (USW00093184), 4.0 mi NE of the city center, 54 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Los Angeles Intl Airport (USW00023174), 34 mi NW of the city center, 97 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: J. Wayne Apt-Orange Co Apt (722977-93184), 4.0 mi NE of the city center, 43 ft (57 ft lower than the city). Hourly observations, 1991-2020.