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September weather forecast in Cupertino

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

27

+22

+18

27 August, sun

+22

+18

Feels like

+22

	785 mmHg		60%
	4.5 m/s

27 August, Sunday. day, 22°; night, 18°; clear

28

+21

+16

28 August, mon

+21

+16

Feels like

+20

	785 mmHg		62%
	5 m/s

28 August, Monday. day, 21°; night, 16°; clear

29

+21

+16

29 August, tue

+21

+16

Feels like

+19

	785 mmHg		62%
	5.1 m/s

29 August, Tuesday. day, 21°; night, 16°; clear

30

+21

+16

30 August, wed

+21

+16

Feels like

+19

	784 mmHg		62%
	4.8 m/s

30 August, Wednesday. day, 21°; night, 16°; clear

31

+22

+18

31 August, thu

+22

+18

Feels like

+22

	784 mmHg		58%
	4.9 m/s

31 August, Thursday. day, 22°; night, 18°; clear

1

+23

+18

1 September, fri

+23

+18

Feels like

+22

	784 mmHg		56%
	4 m/s

1 September, Friday. day, 23°; night, 18°; clear

2

+22

+16

2 September, sat

+22

+16

Feels like

+21

	785 mmHg		56%
	4.5 m/s

2 September, Saturday. day, 22°; night, 16°; clear

3

+21

+15

3 September, sun

+21

+15

Feels like

+20

	785 mmHg		62%
	4.5 m/s

3 September, Sunday. day, 21°; night, 15°; clear

4

+21

+16

4 September, mon

+21

+16

Feels like

+20

	785 mmHg		62%
	4.5 m/s

4 September, Monday. day, 21°; night, 16°; clear

5

+23

+17

5 September, tue

+23

+17

Feels like

+22

	785 mmHg		54%
	4.1 m/s

5 September, Tuesday. day, 23°; night, 17°; clear

6

+22

+17

6 September, wed

+22

+17

Feels like

+22

	785 mmHg		56%
	4.4 m/s

6 September, Wednesday. day, 22°; night, 17°; clear

7

+21

+16

7 September, thu

+21

+16

Feels like

+21

	785 mmHg		58%
	4.1 m/s

7 September, Thursday. day, 21°; night, 16°; clear

8

+21

+17

8 September, fri

+21

+17

Feels like

+20

	785 mmHg		62%
	4 m/s

8 September, Friday. day, 21°; night, 17°; clear

9

+23

+18

9 September, sat

+23

+18

Feels like

+22

	785 mmHg		56%
	4.1 m/s

9 September, Saturday. day, 23°; night, 18°; clear

10

+22

+16

10 September, sun

+22

+16

Feels like

+22

	785 mmHg		58%
	3.7 m/s

10 September, Sunday. day, 22°; night, 16°; partly cloudy

11

+20

+15

11 September, mon

+20

+15

Feels like

+20

	786 mmHg		69%
	4 m/s

11 September, Monday. day, 20°; night, 15°; partly cloudy

12

+18

+15

12 September, tue

+18

+15

Feels like

+18

	785 mmHg		73%
	3.5 m/s

12 September, Tuesday. day, 18°; night, 15°; clear

13

+18

+14

13 September, wed

+18

+14

Feels like

+17

	785 mmHg		70%
	4.1 m/s

13 September, Wednesday. day, 18°; night, 14°; clear

14

+18

+14

14 September, thu

+18

+14

Feels like

+17

	787 mmHg		70%
	5.1 m/s

14 September, Thursday. day, 18°; night, 14°; clear

15

+18

+15

15 September, fri

+18

+15

Feels like

+18

	787 mmHg		70%
	5 m/s

15 September, Friday. day, 18°; night, 15°; clear

16

+19

+16

16 September, sat

+19

+16

Feels like

+19

	786 mmHg		68%
	4.8 m/s

16 September, Saturday. day, 19°; night, 16°; clear

17

+21

+16

17 September, sun

+21

+16

Feels like

+20

	786 mmHg		64%
	4.4 m/s

17 September, Sunday. day, 21°; night, 16°; clear

18

+21

+17

18 September, mon

+21

+17

Feels like

+21

	786 mmHg		60%
	4.5 m/s

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

19

+21

+17

19 September, tue

+21

+17

Feels like

+21

	785 mmHg		62%
	3.7 m/s

19 September, Tuesday. day, 21°; night, 17°; clear

20

+19

+15

20 September, wed

+19

+15

Feels like

+18

	785 mmHg		66%
	5 m/s

20 September, Wednesday. day, 19°; night, 15°; clear

21

+19

+15

21 September, thu

+19

+15

Feels like

+18

	786 mmHg		67%
	5.1 m/s

21 September, Thursday. day, 19°; night, 15°; clear

22

+21

+16

22 September, fri

+21

+16

Feels like

+19

	787 mmHg		60%
	5.4 m/s

22 September, Friday. day, 21°; night, 16°; clear

23

+21

+17

23 September, sat

+21

+17

Feels like

+20

	786 mmHg		56%
	5 m/s

23 September, Saturday. day, 21°; night, 17°; clear

24

+21

+17

24 September, sun

+21

+17

Feels like

+20

	786 mmHg		56%
	4.9 m/s

24 September, Sunday. day, 21°; night, 17°; clear

25

+23

+19

25 September, mon

+23

+19

Feels like

+22

	785 mmHg		51%
	5 m/s

25 September, Monday. day, 23°; night, 19°; clear

26

+24

+19

26 September, tue

+24

+19

Feels like

+23

	785 mmHg		46%
	3.7 m/s

26 September, Tuesday. day, 24°; night, 19°; clear

27

+23

+18

27 September, wed

+23

+18

Feels like

+22

	785 mmHg		49%
	3.5 m/s

27 September, Wednesday. day, 23°; night, 18°; clear

28

+19

+15

28 September, thu

+19

+15

Feels like

+18

	786 mmHg		64%
	3.9 m/s

28 September, Thursday. day, 19°; night, 15°; clear

29

+18

+15

29 September, fri

+18

+15

Feels like

+17

	787 mmHg		67%
	4.3 m/s

29 September, Friday. day, 18°; night, 15°; clear

30

+20

+17

30 September, sat

+20

+17

Feels like

+19

	787 mmHg		57%
	4.5 m/s

30 September, Saturday. day, 20°; night, 17°; clear

Average data for 10 years

Cupertino September

28

sunny days

0

days with precipitation

2

cloudy days

28 sunny days; 0 days with precipitation; 2 cloudy days;

61

%

air humidity

2.4

m/s

WindW

5

mm of precipitation

(1% of annual average)

air humidity 61%; 5 millimeters of precipitation (1% of annual average); Wind westerly 2.4 Meters per second

Weather graphs for September

TemperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

W

W

W

W

W

NW

W

NW

W

W

W

W

W

W

W

W

W

NW

W

W

W

NW

NW

NW

NW

NW

NW

NW

W

NW

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

San Francisco
Sacramento
San Jose
Oakland
Santa Barbara
Monterey
Merced
Washington
Stanford

Cities with similar weather in September

Podgorica, Montenegro
Toronto, Canada
Genoa, Italy
Boston, United States
Seattle, United States
Lima, Peru
Brisbane, Australia
San Remo, Italy
San Sebastian, Spain

The weather forecast for September 2023 is based on historical data from the past 10 years.

September in Cupertino is the warmest month of the year. In September, the weather in Cupertino is typically warm. Average daily high temperature in September is about 21 degrees above zero. On average, Cupertino has 28 sunny and 2 partly cloudy days in September. September as well as July and August is considered the most comfortable time to visit Cupertino.

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