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September weather forecast in Costa Mesa

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

31 August, sun

	749 mmHg		62%
	3.4 m/s		+26

31 August, Sunday. day, 24°; night, 21°; clear

1 September, mon

	750 mmHg		62%
	3.2 m/s		+26

1 September, Monday. day, 24°; night, 21°; clear

2 September, tue

	750 mmHg		61%
	3.5 m/s		+26

2 September, Tuesday. day, 24°; night, 20°; clear

3 September, wed

	750 mmHg		61%
	3.9 m/s		+26

3 September, Wednesday. day, 24°; night, 21°; clear

4 September, thu

	750 mmHg		62%
	3.4 m/s		+25

4 September, Thursday. day, 23°; night, 20°; clear

5 September, fri

	750 mmHg		60%
	3.2 m/s		+26

5 September, Friday. day, 24°; night, 21°; clear

6 September, sat

	750 mmHg		61%
	3.5 m/s		+26

6 September, Saturday. day, 24°; night, 21°; clear

7 September, sun

	750 mmHg		64%
	3.2 m/s		+25

7 September, Sunday. day, 23°; night, 20°; clear

8 September, mon

	751 mmHg		63%
	3.2 m/s		+25

8 September, Monday. day, 22°; night, 20°; clear

9 September, tue

	751 mmHg		62%
	3.9 m/s		+25

9 September, Tuesday. day, 23°; night, 20°; clear

10 September, wed

	751 mmHg		63%
	3.4 m/s		+25

10 September, Wednesday. day, 22°; night, 20°; clear

11 September, thu

	751 mmHg		66%
	3.2 m/s		+25

11 September, Thursday. day, 22°; night, 19°; clear

12 September, fri

	751 mmHg		68%
	4 m/s		+25

12 September, Friday. day, 22°; night, 19°; clear

13 September, sat

	751 mmHg		68%
	3.7 m/s		+24

13 September, Saturday. day, 22°; night, 20°; clear

14 September, sun

	751 mmHg		68%
	4.3 m/s		+25

14 September, Sunday. day, 23°; night, 20°; clear

15 September, mon

	751 mmHg		62%
	3.5 m/s		+25

15 September, Monday. day, 23°; night, 21°; clear

16 September, tue

	751 mmHg		67%
	3.2 m/s		+25

16 September, Tuesday. day, 22°; night, 19°; clear

17 September, wed

	751 mmHg		69%
	3.4 m/s		+24

17 September, Wednesday. day, 21°; night, 18°; clear

18 September, thu

	751 mmHg		68%
	3 m/s		+24

18 September, Thursday. day, 21°; night, 19°; clear

19 September, fri

	751 mmHg		67%
	3.2 m/s		+24

19 September, Friday. day, 22°; night, 19°; clear

20 September, sat

	751 mmHg		72%
	4 m/s		+24

20 September, Saturday. day, 21°; night, 18°; clear

21 September, sun

	751 mmHg		69%
	3.5 m/s		+24

21 September, Sunday. day, 22°; night, 19°; clear

22 September, mon

	751 mmHg		62%
	3.7 m/s		+25

22 September, Monday. day, 23°; night, 20°; clear

23 September, tue

	751 mmHg		56%
	3.7 m/s		+26

23 September, Tuesday. day, 24°; night, 22°; clear

24 September, wed

	751 mmHg		55%
	3.9 m/s		+26

24 September, Wednesday. day, 24°; night, 22°; clear

25 September, thu

	750 mmHg		55%
	4.3 m/s		+26

25 September, Thursday. day, 25°; night, 22°; clear

26 September, fri

	750 mmHg		55%
	3.7 m/s		+27

26 September, Friday. day, 25°; night, 21°; clear

27 September, sat

	751 mmHg		58%
	3.7 m/s		+26

27 September, Saturday. day, 24°; night, 22°; clear

28 September, sun

	751 mmHg		62%
	3.7 m/s		+25

28 September, Sunday. day, 23°; night, 20°; clear

29 September, mon

	751 mmHg		58%
	3.4 m/s		+25

29 September, Monday. day, 23°; night, 21°; clear

30 September, tue

	751 mmHg		55%
	3.5 m/s		+26

30 September, Tuesday. day, 24°; night, 21°; clear

1 October, wed

	751 mmHg		56%
	3.5 m/s		+26

1 October, Wednesday. day, 24°; night, 21°; clear

2 October, thu

	750 mmHg		63%
	3.5 m/s		+24

2 October, Thursday. day, 22°; night, 19°; partly cloudy

3 October, fri

	751 mmHg		61%
	4.5 m/s		+23

3 October, Friday. day, 20°; night, 18°; partly cloudy

4 October, sat

	752 mmHg		64%
	4.5 m/s		+22

4 October, Saturday. day, 20°; night, 18°; clear

Average data for 10 years

Costa Mesa September

30

sunny days

0

days with precipitation

0

cloudy days

30 sunny days; 0 days with precipitation; 0 cloudy days;

62

%

air humidity

2

m/s

WindSW

8

mm of precipitation

(3% of annual average)

+25

°C

Water temperature

air humidity 62%; 8 millimeters of precipitation (3% of annual average); Wind south-westerly 2 Meters per second; Water temperature +25°

Weather graphs for September

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

SW

SW

SW

W

S

SW

W

W

W

W

W

SW

W

W

SW

SW

W

W

W

S

W

SW

W

W

SW

S

S

W

SW

S

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Los Angeles
Las Vegas
San Diego
Mexicali
Yuma
Irvine
Beverly Hills
Santa Barbara
Long Beach

Cities with similar weather in September

Barcelona
Rome
Batumi
Heraklion
Nice
Salou
Malaga
Rio de Janeiro
Pisa

The weather forecast for September 2024 is based on historical data from the past 10 years.

September in Costa Mesa is the warmest month of the year. In September, the weather in Costa Mesa is typically warm. Average daily high temperature in September is about 23 degrees above zero. On average, Costa Mesa has 30 sunny days in September. September as well as July, August, and October is considered the most comfortable time to visit Costa Mesa.

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