10 day forecast Monthly forecast Weather map

City or area

Go to comparison

September weather forecast in Palo Alto

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

	746 mmHg		76%
	3.6 m/s		+16

31 August, Sunday. day, 24°; night, 14°; clear

1 September, mon

	745 mmHg		74%
	3.6 m/s		+16

1 September, Monday. day, 24°; night, 14°; clear

2 September, tue

	746 mmHg		73%
	3.5 m/s		+16

2 September, Tuesday. day, 24°; night, 14°; clear

3 September, wed

	746 mmHg		73%
	3.5 m/s		+16

3 September, Wednesday. day, 24°; night, 14°; clear

4 September, thu

	746 mmHg		75%
	3.8 m/s		+16

4 September, Thursday. day, 23°; night, 14°; clear

5 September, fri

	746 mmHg		73%
	3.8 m/s		+16

5 September, Friday. day, 25°; night, 14°; clear

6 September, sat

	746 mmHg		71%
	3.5 m/s		+16

6 September, Saturday. day, 25°; night, 14°; clear

7 September, sun

	746 mmHg		71%
	3.4 m/s		+16

7 September, Sunday. day, 25°; night, 14°; clear

8 September, mon

	746 mmHg		73%
	3.7 m/s		+16

8 September, Monday. day, 24°; night, 14°; clear

9 September, tue

	745 mmHg		75%
	3.7 m/s		+16

9 September, Tuesday. day, 23°; night, 14°; partly cloudy

10 September, wed

	746 mmHg		75%
	3.6 m/s		+16

10 September, Wednesday. day, 23°; night, 14°; clear

11 September, thu

	747 mmHg		75%
	3.5 m/s		+16

11 September, Thursday. day, 24°; night, 14°; clear

12 September, fri

	747 mmHg		76%
	3.6 m/s		+16

12 September, Friday. day, 23°; night, 14°; partly cloudy

13 September, sat

	746 mmHg		76%
	3.6 m/s		+16

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

14 September, sun

	746 mmHg		78%
	3.7 m/s		+16

14 September, Sunday. day, 22°; night, 14°; partly cloudy

15 September, mon

	747 mmHg		79%
	4.1 m/s		+16

15 September, Monday. day, 21°; night, 13°; partly cloudy

16 September, tue

	747 mmHg		78%
	4.1 m/s		+16

16 September, Tuesday. day, 21°; night, 13°; partly cloudy

17 September, wed

	747 mmHg		77%
	4.1 m/s		+16

17 September, Wednesday. day, 22°; night, 13°; partly cloudy

18 September, thu

	746 mmHg		75%
	4 m/s		+15

18 September, Thursday. day, 23°; night, 14°; rain

19 September, fri

	746 mmHg		74%
	3.8 m/s		+16

19 September, Friday. day, 24°; night, 14°; clear

20 September, sat

	746 mmHg		73%
	3.6 m/s		+16

20 September, Saturday. day, 24°; night, 14°; clear

21 September, sun

	746 mmHg		72%
	3.6 m/s		+16

21 September, Sunday. day, 24°; night, 14°; clear

22 September, mon

	746 mmHg		74%
	3.5 m/s		+16

22 September, Monday. day, 23°; night, 13°; clear

23 September, tue

	747 mmHg		74%
	3.3 m/s		+16

23 September, Tuesday. day, 24°; night, 13°; clear

24 September, wed

	747 mmHg		73%
	3.4 m/s		+16

24 September, Wednesday. day, 24°; night, 14°; clear

25 September, thu

	747 mmHg		72%
	3.3 m/s		+16

25 September, Thursday. day, 24°; night, 14°; clear

26 September, fri

	747 mmHg		73%
	3.4 m/s		+17

26 September, Friday. day, 24°; night, 14°; clear

27 September, sat

	747 mmHg		73%
	3.4 m/s		+16

27 September, Saturday. day, 24°; night, 14°; clear

28 September, sun

	746 mmHg		72%
	3.5 m/s		+16

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

29 September, mon

	747 mmHg		74%
	3.6 m/s		+16

29 September, Monday. day, 23°; night, 13°; partly cloudy

30 September, tue

	747 mmHg		74%
	3.4 m/s		+16

30 September, Tuesday. day, 23°; night, 13°; partly cloudy

1 October, wed

	747 mmHg		72%
	3.5 m/s		+16

1 October, Wednesday. day, 23°; night, 14°; clear

2 October, thu

	747 mmHg		71%
	3.5 m/s		+15

2 October, Thursday. day, 23°; night, 13°; clear

3 October, fri

	747 mmHg		72%
	3.8 m/s		+15

3 October, Friday. day, 22°; night, 13°; clear

4 October, sat

	747 mmHg		70%
	4 m/s		+15

4 October, Saturday. day, 22°; night, 13°; clear

Average data for 10 years

Palo Alto September

19

sunny days

1

day with precipitation

10

cloudy days

19 sunny days; 1 day with precipitation; 10 cloudy days;

74

%

air humidity

1.9

m/s

WindW

3

mm of precipitation

(1% of annual average)

+16

°C

Water temperature

air humidity 74%; 3 millimeters of precipitation (1% of annual average); Wind westerly 1.9 Meters per second; Water temperature +16°

Weather graphs for September

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

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

SW

SW

SW

W

W

W

SW

W

W

SW

W

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
Santa Barbara
Stanford

Cities with similar weather in September

Podgorica
Genoa
Boston
Seattle
Lima
Brisbane
Albena
San Remo
San Sebastian

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

September in Palo Alto is the sunniest and the warmest month of the year. In September, the weather in Palo Alto is typically warm. Average daily high temperature in September is about 23 degrees above zero. On average, Palo Alto has 19 sunny, 10 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 Palo Alto.

Links

Help Terms of use Contact us

For partners

Advertisement Yandex.Weather API

Weather forecasts

Hourly forecast Detailed 10 day forecast Monthly forecast Weather map Magnetic storms

Download app

English

English
Русский

Source data: Yandex.Traffic, Roshydromet FSBI "CAO", NOAA, © OpenStreetMap

© 2017–2025 YANDEX LLC