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September weather forecast in San Leandro

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

	759 mmHg		72%
	4.6 m/s		+15

31 August, Sunday. day, 25°; night, 13°; clear

1 September, mon

	758 mmHg		71%
	4.5 m/s		+15

1 September, Monday. day, 25°; night, 13°; clear

2 September, tue

	759 mmHg		71%
	4.4 m/s		+15

2 September, Tuesday. day, 26°; night, 14°; clear

3 September, wed

	759 mmHg		70%
	4.6 m/s		+15

3 September, Wednesday. day, 25°; night, 13°; clear

4 September, thu

	759 mmHg		71%
	4.69 m/s		+15

4 September, Thursday. day, 25°; night, 13°; clear

5 September, fri

	759 mmHg		70%
	4.6 m/s		+15

5 September, Friday. day, 26°; night, 13°; clear

6 September, sat

	759 mmHg		67%
	4.3 m/s		+15

6 September, Saturday. day, 27°; night, 13°; clear

7 September, sun

	759 mmHg		68%
	4.4 m/s		+15

7 September, Sunday. day, 27°; night, 13°; clear

8 September, mon

	759 mmHg		69%
	4.6 m/s		+15

8 September, Monday. day, 26°; night, 13°; clear

9 September, tue

	758 mmHg		72%
	4.69 m/s		+15

9 September, Tuesday. day, 24°; night, 13°; partly cloudy

10 September, wed

	759 mmHg		73%
	4.5 m/s		+15

10 September, Wednesday. day, 24°; night, 13°; clear

11 September, thu

	760 mmHg		72%
	4.3 m/s		+15

11 September, Thursday. day, 25°; night, 13°; clear

12 September, fri

	760 mmHg		73%
	4.6 m/s		+15

12 September, Friday. day, 24°; night, 13°; partly cloudy

13 September, sat

	759 mmHg		72%
	4.6 m/s		+15

13 September, Saturday. day, 24°; night, 13°; partly cloudy

14 September, sun

	759 mmHg		75%
	4.69 m/s		+15

14 September, Sunday. day, 23°; night, 13°; partly cloudy

15 September, mon

	760 mmHg		76%
	5 m/s		+15

15 September, Monday. day, 22°; night, 13°; partly cloudy

16 September, tue

	760 mmHg		75%
	5.1 m/s		+15

16 September, Tuesday. day, 22°; night, 13°; partly cloudy

17 September, wed

	760 mmHg		74%
	5 m/s		+15

17 September, Wednesday. day, 23°; night, 13°; partly cloudy

18 September, thu

	759 mmHg		72%
	4.69 m/s		+15

18 September, Thursday. day, 24°; night, 13°; rain

19 September, fri

	759 mmHg		71%
	4.6 m/s		+15

19 September, Friday. day, 25°; night, 13°; clear

20 September, sat

	759 mmHg		69%
	4.4 m/s		+15

20 September, Saturday. day, 26°; night, 13°; clear

21 September, sun

	759 mmHg		69%
	4.3 m/s		+15

21 September, Sunday. day, 25°; night, 13°; clear

22 September, mon

	759 mmHg		71%
	4.3 m/s		+15

22 September, Monday. day, 24°; night, 12°; clear

23 September, tue

	760 mmHg		71%
	4 m/s		+15

23 September, Tuesday. day, 25°; night, 12°; clear

24 September, wed

	760 mmHg		70%
	4.1 m/s		+15

24 September, Wednesday. day, 26°; night, 12°; clear

25 September, thu

	760 mmHg		70%
	4.19 m/s		+15

25 September, Thursday. day, 25°; night, 13°; clear

26 September, fri

	760 mmHg		70%
	4.19 m/s		+15

26 September, Friday. day, 25°; night, 13°; clear

27 September, sat

	760 mmHg		69%
	4.19 m/s		+15

27 September, Saturday. day, 25°; night, 13°; clear

28 September, sun

	759 mmHg		69%
	4.4 m/s		+15

28 September, Sunday. day, 25°; night, 13°; clear

29 September, mon

	760 mmHg		71%
	4.6 m/s		+15

29 September, Monday. day, 24°; night, 12°; partly cloudy

30 September, tue

	760 mmHg		72%
	4.3 m/s		+15

30 September, Tuesday. day, 24°; night, 12°; partly cloudy

1 October, wed

	760 mmHg		68%
	4.19 m/s		+15

1 October, Wednesday. day, 24°; night, 13°; clear

2 October, thu

	760 mmHg		67%
	4.19 m/s		+14

2 October, Thursday. day, 24°; night, 13°; clear

3 October, fri

	760 mmHg		69%
	4.5 m/s		+14

3 October, Friday. day, 24°; night, 12°; clear

4 October, sat

	760 mmHg		67%
	4.8 m/s		+14

4 October, Saturday. day, 23°; night, 13°; clear

Average data for 10 years

San Leandro September

20

sunny days

1

day with precipitation

9

cloudy days

20 sunny days; 1 day with precipitation; 9 cloudy days;

71

%

air humidity

2.5

m/s

WindSW

3

mm of precipitation

(1% of annual average)

+15

°C

Water temperature

air humidity 71%; 3 millimeters of precipitation (1% of annual average); Wind south-westerly 2.5 Meters per second; Water temperature +15°

Weather graphs for September

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

SW

SW

SW

SW

W

SW

SW

SW

SW

SW

SW

SW

SW

SW

W

W

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

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
Oakland
Redding
Monterey
San Jose
Reno
Stanford
San Luis Obispo

Cities with similar weather in September

Varna
Podgorica
The Golden Sands
Genoa
Boston
Marseilles
Seattle
Lima
Brisbane

The weather forecast for September 2025 is based on historical data from the past 10 years.

September in San Leandro is the sunniest and the warmest month of the year. In September, the weather in San Leandro is typically warm. Average daily high temperature in September is about 25 degrees above zero. On average, San Leandro has 20 sunny, 9 partly cloudy, and 1 rainy day in September. The rains are usually light. September as well as June, July, August, and October is considered the most comfortable time to visit San Leandro.

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