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October weather forecast in Castro Valley

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

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

5 October, sun

	761 mmHg		65%
	4.1 m/s		+14

5 October, Sunday. day, 24°; night, 12°; clear

6 October, mon

	761 mmHg		66%
	4 m/s		+14

6 October, Monday. day, 24°; night, 12°; clear

7 October, tue

	761 mmHg		67%
	4.1 m/s		+15

7 October, Tuesday. day, 24°; night, 12°; clear

8 October, wed

	760 mmHg		69%
	4 m/s		+14

8 October, Wednesday. day, 24°; night, 12°; clear

9 October, thu

	760 mmHg		70%
	4.3 m/s		+14

9 October, Thursday. day, 23°; night, 12°; clear

10 October, fri

	760 mmHg		70%
	4.4 m/s		+14

10 October, Friday. day, 22°; night, 12°; clear

11 October, sat

	760 mmHg		70%
	4.3 m/s		+14

11 October, Saturday. day, 22°; night, 11°; clear

12 October, sun

	761 mmHg		63%
	4.1 m/s		+14

12 October, Sunday. day, 23°; night, 11°; clear

13 October, mon

	761 mmHg		64%
	3.8 m/s		+15

13 October, Monday. day, 24°; night, 11°; clear

14 October, tue

	761 mmHg		68%
	3.8 m/s		+15

14 October, Tuesday. day, 24°; night, 12°; clear

15 October, wed

	761 mmHg		68%
	4.1 m/s		+15

15 October, Wednesday. day, 23°; night, 12°; partly cloudy

16 October, thu

	761 mmHg		66%
	4.3 m/s		+14

16 October, Thursday. day, 23°; night, 12°; partly cloudy

17 October, fri

	761 mmHg		66%
	4.1 m/s		+14

17 October, Friday. day, 23°; night, 12°; clear

18 October, sat

	761 mmHg		71%
	4.1 m/s		+14

18 October, Saturday. day, 23°; night, 11°; clear

19 October, sun

	762 mmHg		73%
	3.9 m/s		+14

19 October, Sunday. day, 22°; night, 12°; partly cloudy

20 October, mon

	761 mmHg		74%
	4 m/s		+14

20 October, Monday. day, 22°; night, 11°; partly cloudy

21 October, tue

	762 mmHg		71%
	3.8 m/s		+14

21 October, Tuesday. day, 22°; night, 11°; clear

22 October, wed

	762 mmHg		70%
	4 m/s		+14

22 October, Wednesday. day, 22°; night, 11°; partly cloudy

23 October, thu

	762 mmHg		71%
	3.8 m/s		+14

23 October, Thursday. day, 22°; night, 11°; partly cloudy

24 October, fri

	761 mmHg		69%
	4.1 m/s		+14

24 October, Friday. day, 22°; night, 11°; rain

25 October, sat

	762 mmHg		68%
	4.3 m/s		+14

25 October, Saturday. day, 22°; night, 12°; rain

26 October, sun

	762 mmHg		66%
	4 m/s		+14

26 October, Sunday. day, 22°; night, 10°; clear

27 October, mon

	762 mmHg		68%
	3.9 m/s		+14

27 October, Monday. day, 21°; night, 10°; partly cloudy

28 October, tue

	762 mmHg		69%
	4.19 m/s		+14

28 October, Tuesday. day, 21°; night, 11°; rain

29 October, wed

	762 mmHg		72%
	3.8 m/s		+14

29 October, Wednesday. day, 20°; night, 10°; clear

30 October, thu

	762 mmHg		73%
	3.9 m/s		+14

30 October, Thursday. day, 19°; night, 10°; partly cloudy

31 October, fri

	763 mmHg		75%
	3.5 m/s		+14

31 October, Friday. day, 20°; night, 10°; overcast

1 November, sat

	763 mmHg		72%
	3.6 m/s		+14

1 November, Saturday. day, 20°; night, 10°; clear

Average data for 10 years

Castro Valley October

19

sunny days

3

days with precipitation

2

cloudy days

19 sunny days; 3 days with precipitation; 2 cloudy days;

69

%

air humidity

2.2

m/s

WindSW

23

mm of precipitation

(5% of annual average)

+14

°C

Water temperature

air humidity 69%; 23 millimeters of precipitation (5% of annual average); Wind south-westerly 2.2 Meters per second; Water temperature +14°

Weather graphs for October

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

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

S

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

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25

26

27

28

29

30

31

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 October

Kemer
Batumi
Lisbon
Budva
Tokyo
New Athos
Nice
Sydney
Gudauta

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

In October, the weather in Castro Valley is typically warm. Average daily high temperature in October is about 23 degrees above zero. On average, Castro Valley has 19 sunny, 8 partly cloudy, 3 rainy, and 1 cloudy day in October. The rains are usually moderate. October as well as June, July, August, and September is considered the most comfortable time to visit Castro Valley.

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