Castro Valley, CA Hourly Weather Forecast

Wed, Nov 18, 2026

Wednesday

Thu 11/19

High 58°f

Periods of rain. High 58F. Winds SSW at 10 to 15 mph. Chance of rain 70%. Rainfall around a half an inch. Locally heavy rainfall possible.

Wednesday night

Thu 11/19

Low 46°f

58% Precip. / 0.14 in

Considerable cloudiness with occasional rain showers. Low 46F. Winds ESE at 5 to 10 mph. Chance of rain 60%.

Sunrise 6:51 AM

Sunset 4:55 PM

Moonrise 1:27 PM

Moonset 12:20 AM

Waxing Gibbous, 63% visible

Hourly Forecast

12AM

50°

1AM

37%

50°

2AM

39%

51°

3AM

41%

51°

4AM

66%

50°

5AM

76%

50°

6AM

75%

50°

6:51AM

Sunrise

7AM

75%

49°

8AM

74%

51°

9AM

74%

53°

10AM

74%

54°

11AM

73%

55°

12PM

73%

56°

1PM

72%

56°

2PM

72%

57°

3PM

72%

57°

4PM

61%

56°

4:55PM

Sunset

5PM

62%

54°

6PM

60%

53°

7PM

58%

52°

8PM

58%

52°

9PM

57%

52°

10PM

54%

51°

11PM

53%

51°

Time	Conditions	Temp.	Feels Like	Precip	Amount	Cloud Cover	Dew Point	Humidity	Wind	Pressure
12:00 am	Partly Cloudy	50°F	48°F	24%	0in	54%	43°F	77%	7 mph SE	30.05in
1:00 am	Showers	50°F	47°F	37%	0.02in	68%	44°F	78%	8 mph SE	30.04in
2:00 am	Showers	51°F	47°F	39%	0.02in	76%	44°F	77%	9 mph SE	30.03in
3:00 am	Showers	51°F	47°F	41%	0.03in	82%	45°F	79%	9 mph SE	30.02in
4:00 am	Rain	50°F	46°F	66%	0.05in	100%	45°F	82%	10 mph SE	30.02in
5:00 am	Rain	50°F	46°F	76%	0.06in	100%	46°F	85%	10 mph SE	29.99in
6:00 am	Rain	50°F	46°F	75%	0.05in	100%	46°F	88%	10 mph SE	29.99in
7:00 am	Rain	49°F	45°F	75%	0.05in	100%	47°F	91%	10 mph SSE	29.98in
8:00 am	Rain	51°F	47°F	74%	0.04in	100%	49°F	92%	10 mph SSE	29.98in
9:00 am	Rain	53°F	50°F	74%	0.04in	100%	50°F	90%	10 mph S	29.98in
10:00 am	Rain	54°F	51°F	74%	0.04in	100%	51°F	88%	10 mph S	29.98in
11:00 am	Rain	55°F	52°F	73%	0.04in	100%	51°F	86%	11 mph SSW	29.98in
12:00 pm	Rain	56°F	53°F	73%	0.04in	100%	50°F	83%	11 mph SSW	29.97in
1:00 pm	Rain	56°F	53°F	72%	0.06in	100%	50°F	80%	11 mph SW	29.97in
2:00 pm	Rain	57°F	54°F	72%	0.05in	100%	50°F	77%	11 mph SW	29.97in
3:00 pm	Rain	57°F	54°F	72%	0.05in	100%	49°F	76%	11 mph SW	29.97in
4:00 pm	Light Rain	56°F	53°F	61%	0.02in	80%	50°F	80%	11 mph SW	29.97in
5:00 pm	Light Rain	54°F	52°F	62%	0.02in	80%	50°F	84%	9 mph WSW	29.98in
6:00 pm	Light Rain	53°F	50°F	60%	0.02in	80%	50°F	89%	7 mph SW	29.98in
7:00 pm	Showers	52°F	51°F	58%	0.02in	64%	49°F	89%	6 mph SSW	29.99in
8:00 pm	Showers	52°F	50°F	58%	0.01in	66%	48°F	87%	5 mph S	29.99in
9:00 pm	Showers	52°F	50°F	57%	0.01in	70%	48°F	87%	6 mph SE	30in
10:00 pm	Showers	51°F	49°F	54%	0.01in	72%	47°F	88%	6 mph ESE	30in
11:00 pm	Showers	51°F	48°F	53%	0.01in	69%	47°F	87%	6 mph ESE	29.99in

Additional Conditions

Pressure 29.91 in
Visibility 10 miles
Clouds Partly Cloudy
Dew Point46°F
Humidity 77%
Rainfall 0 in
Snow Depth 0 in

KHWD Station History

Almanac for November 12, 2026

Forecast Average Record
Temperature
High 71°F 66°F 75°F 1995
Low 50°F 48°F 34°F 1948
Rain/Snow Depth
Precipitation 0.01 in 4.8 in -
Snow 0 in 0.1 in -

Almanac for November 13, 2026

Forecast Average Record
Temperature
High 60°F 66°F 77°F
Low 52°F 48°F 33°F

Astronomy

Sun Rise Set
Actual Time 6:45 AM 4:59 PM
Civil Twilight 6:17 AM 5:27 PM
Nautical Twilight 5:46 AM 5:58PM
Astronomical Twilight 5:15 AM 6:29 PM

Length of Visible Light 11h 9m
Length of Day 10h 13m
Tomorrow will be 1 minute 50 seconds shorter

Moon 10:11 AM 7:19 PM
Waxing Crescent11% of the Moon is Illuminated

Nov 17

Waxing Half First Qtr

Nov 24

Full Moon

Nov 30

Waning Half Last Qtr

Dec 8

New Moon

Nearby Weather Stations

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