Costa Mesa, CA Hourly Weather Forecast

Wed, Oct 21, 2026

Wednesday

Thu 10/22

High 73°f

54% Precip. / 0.13 in

Mixed clouds and sun with scattered thunderstorms. High 73F. Winds S at 10 to 15 mph. Chance of rain 50%.

Wednesday night

Thu 10/22

Low 62°f

63% Precip. / 0.22 in

Thunderstorms in the evening, then variable clouds overnight with still a chance of showers. Low 62F. Winds light and variable. Chance of rain 60%.

Sunrise 7:01 AM

Sunset 6:10 PM

Moonrise 3:42 PM

Moonset 2:21 AM

Waxing Gibbous, 80% visible

Hourly Forecast

12AM

67°

1AM

66°

2AM

31%

66°

3AM

34%

66°

4AM

35%

66°

5AM

45%

66°

6AM

44%

65°

7AM

43%

65°

7:01AM

Sunrise

8AM

46%

65°

9AM

46%

67°

10AM

52%

69°

11AM

55%

71°

12PM

53%

72°

1PM

52%

72°

2PM

49%

72°

3PM

48%

71°

4PM

39%

71°

5PM

41%

70°

6PM

43%

69°

6:10PM

Sunset

7PM

44%

68°

8PM

54%

67°

9PM

59%

67°

10PM

64%

67°

11PM

51%

66°

Time	Conditions	Temp.	Feels Like	Precip	Amount	Cloud Cover	Dew Point	Humidity	Wind	Pressure
12:00 am	Partly Cloudy	67°F	67°F	23%	0in	48%	58°F	74%	3 mph SW	29.86in
1:00 am	Partly Cloudy	66°F	66°F	24%	0in	54%	58°F	74%	3 mph S	29.85in
2:00 am	Few Showers	66°F	66°F	31%	0in	60%	59°F	77%	4 mph ESE	29.85in
3:00 am	Few Showers	66°F	66°F	34%	0.01in	63%	58°F	77%	4 mph SSE	29.84in
4:00 am	Showers	66°F	66°F	35%	0.01in	67%	58°F	77%	4 mph SE	29.84in
5:00 am	Showers	66°F	66°F	45%	0.01in	69%	58°F	77%	4 mph SSE	29.83in
6:00 am	Showers	65°F	65°F	44%	0.01in	68%	57°F	76%	4 mph SE	29.84in
7:00 am	Scattered Thunderstorms	65°F	65°F	43%	0.01in	64%	58°F	78%	5 mph ESE	29.85in
8:00 am	Scattered Thunderstorms	65°F	65°F	46%	0.01in	63%	58°F	77%	5 mph ESE	29.87in
9:00 am	Scattered Thunderstorms	67°F	67°F	46%	0.01in	67%	58°F	70%	7 mph SE	29.88in
10:00 am	Scattered Thunderstorms	69°F	69°F	52%	0.01in	79%	58°F	67%	7 mph SSE	29.89in
11:00 am	Scattered Thunderstorms	71°F	71°F	55%	0.01in	82%	58°F	64%	9 mph S	29.9in
12:00 pm	Scattered Thunderstorms	72°F	72°F	53%	0.01in	82%	58°F	61%	9 mph S	29.89in
1:00 pm	Scattered Thunderstorms	72°F	72°F	52%	0.01in	82%	57°F	59%	10 mph S	29.88in
2:00 pm	Scattered Thunderstorms	72°F	72°F	49%	0.01in	80%	57°F	61%	10 mph SSW	29.87in
3:00 pm	Scattered Thunderstorms	71°F	71°F	48%	0.01in	78%	57°F	60%	9 mph SSW	29.86in
4:00 pm	Scattered Thunderstorms	71°F	71°F	39%	0.01in	70%	56°F	61%	8 mph SSW	29.85in
5:00 pm	Scattered Thunderstorms	70°F	70°F	41%	0.01in	69%	57°F	63%	7 mph SSW	29.85in
6:00 pm	Scattered Thunderstorms	69°F	69°F	43%	0.01in	71%	56°F	64%	6 mph S	29.86in
7:00 pm	Scattered Thunderstorms	68°F	68°F	44%	0.01in	74%	57°F	68%	6 mph S	29.87in
8:00 pm	Scattered Thunderstorms	67°F	67°F	54%	0.02in	75%	57°F	71%	4 mph S	29.88in
9:00 pm	Scattered Thunderstorms	67°F	67°F	59%	0.02in	74%	58°F	73%	4 mph SSE	29.89in
10:00 pm	Thunderstorms	67°F	67°F	64%	0.02in	75%	58°F	73%	3 mph S	29.89in
11:00 pm	Scattered Thunderstorms	66°F	66°F	51%	0.02in	73%	58°F	74%	3 mph SSE	29.9in

Additional Conditions

Pressure 29.92 in
Visibility 10 miles
Clouds Partly Cloudy
Dew Point43°F
Humidity 20%
Rainfall 0 in
Snow Depth 0 in

KSNA Station History

Almanac for October 16, 2026

Forecast Average Record
Temperature
High 99°F 73°F 88°F 1958
Low 71°F 60°F 44°F 1924
Rain/Snow Depth
Precipitation 0 in 3.6 in -
Snow 0 in 0 in -

Almanac for October 17, 2026

Forecast Average Record
Temperature
High 87°F 73°F 86°F
Low 71°F 60°F 48°F

Astronomy

Sun Rise Set
Actual Time 6:57 AM 6:16 PM
Civil Twilight 6:32 AM 6:41 PM
Nautical Twilight 6:03 AM 7:10PM
Astronomical Twilight 5:34 AM 7:39 PM

Length of Visible Light 12h 9m
Length of Day 11h 19m
Tomorrow will be 2 minutes shorter

Moon 12:47 PM 10:25 PM
Waxing Crescent32% of the Moon is Illuminated

Oct 18

Waxing Half First Qtr

Oct 25

Full Moon

Nov 1

Waning Half Last Qtr

Nov 8

New Moon

Nearby Weather Stations

Loading nearby stations…