Point Forecast: Castro Valley CA  37.72N 122.05W (Elev. 397 ft)	Last Update: 2:52 am PST Nov 15, 2025

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Weather Elements Weather/Precipitation Temperature (°F) Dewpoint (°F) Wind Chill (°F) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Snow Freezing Rain Sleet Fog Trans. Wind  ktmphkm/hm/s 20ft Wind  ktmphkm/hm/s

48-Hour Period Starting: 9am Sat, Nov 15 202510am Sat, Nov 15 202511am Sat, Nov 15 202512pm Sat, Nov 15 20251pm Sat, Nov 15 20252pm Sat, Nov 15 20253pm Sat, Nov 15 20254pm Sat, Nov 15 20255pm Sat, Nov 15 20256pm Sat, Nov 15 20257pm Sat, Nov 15 20258pm Sat, Nov 15 20259pm Sat, Nov 15 202510pm Sat, Nov 15 202511pm Sat, Nov 15 202512am Sun, Nov 16 20251am Sun, Nov 16 20252am Sun, Nov 16 20253am Sun, Nov 16 20254am Sun, Nov 16 20255am Sun, Nov 16 20256am Sun, Nov 16 20257am Sun, Nov 16 20258am Sun, Nov 16 20259am Sun, Nov 16 202510am Sun, Nov 16 202511am Sun, Nov 16 202512pm Sun, Nov 16 20251pm Sun, Nov 16 20252pm Sun, Nov 16 20253pm Sun, Nov 16 20254pm Sun, Nov 16 20255pm Sun, Nov 16 20256pm Sun, Nov 16 20257pm Sun, Nov 16 20258pm Sun, Nov 16 20259pm Sun, Nov 16 202510pm Sun, Nov 16 202511pm Sun, Nov 16 202512am Mon, Nov 17 20251am Mon, Nov 17 20252am Mon, Nov 17 20253am Mon, Nov 17 20254am Mon, Nov 17 20255am Mon, Nov 17 20256am Mon, Nov 17 20257am Mon, Nov 17 20258am Mon, Nov 17 20259am Mon, Nov 17 202510am Mon, Nov 17 202511am Mon, Nov 17 202512pm Mon, Nov 17 20251pm Mon, Nov 17 20252pm Mon, Nov 17 20253pm Mon, Nov 17 20254pm Mon, Nov 17 20255pm Mon, Nov 17 20256pm Mon, Nov 17 20257pm Mon, Nov 17 20258pm Mon, Nov 17 20259pm Mon, Nov 17 202510pm Mon, Nov 17 202511pm Mon, Nov 17 202512am Tue, Nov 18 20251am Tue, Nov 18 20252am Tue, Nov 18 20253am Tue, Nov 18 20254am Tue, Nov 18 20255am Tue, Nov 18 20256am Tue, Nov 18 20257am Tue, Nov 18 20258am Tue, Nov 18 20259am Tue, Nov 18 202510am Tue, Nov 18 202511am Tue, Nov 18 202512pm Tue, Nov 18 20251pm Tue, Nov 18 20252pm Tue, Nov 18 20253pm Tue, Nov 18 20254pm Tue, Nov 18 20255pm Tue, Nov 18 20256pm Tue, Nov 18 20257pm Tue, Nov 18 20258pm Tue, Nov 18 20259pm Tue, Nov 18 202510pm Tue, Nov 18 202511pm Tue, Nov 18 202512am Wed, Nov 19 20251am Wed, Nov 19 20252am Wed, Nov 19 20253am Wed, Nov 19 20254am Wed, Nov 19 20255am Wed, Nov 19 20256am Wed, Nov 19 20257am Wed, Nov 19 20258am Wed, Nov 19 20259am Wed, Nov 19 202510am Wed, Nov 19 202511am Wed, Nov 19 202512pm Wed, Nov 19 20251pm Wed, Nov 19 20252pm Wed, Nov 19 20253pm Wed, Nov 19 20254pm Wed, Nov 19 20255pm Wed, Nov 19 20256pm Wed, Nov 19 20257pm Wed, Nov 19 20258pm Wed, Nov 19 2025

Date	11/15															11/16
Hour (PST)	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08
Temperature (°F)	57	60	61	62	63	62	62	62	60	59	58	58	57	57	57	56	56	56	55	55	55	55	54	55
Dewpoint (°F)	54	55	56	57	58	57	57	57	55	55	55	54	54	54	55	54	54	54	53	54	54	54	54	55
Wind Chill (°F)
Surface Wind (mph)	2	3	3	5	6	6	6	5	5	5	6	6	7	9	9	9	9	9	8	8	8	8	8	8
Wind Dir	ENE	N	W	WSW	WSW	WSW	WSW	SW	SW	SW	SSW	SSW	SSW	SSW	SSW	SSW	SW	SW	SW	SSW	SSW	SSW	S	S
Gust
Sky Cover (%)	76	77	75	80	80	82	79	83	86	90	91	88	93	93	94	93	94	94	93	94	95	97	92	89
Precipitation Potential (%)	16	33	33	33	44	44	44	62	62	62	66	66	66	86	86	86	86	86	86	76	76	76	69	69
Relative Humidity (%)	90	84	85	84	84	84	84	84	84	86	88	88	89	91	92	94	94	94	94	95	95	96	99	99
Rain	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Lkly	Lkly
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																11/17
Hour (PST)	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08
Temperature (°F)	56	57	58	59	60	60	60	59	58	58	57	57	57	57	56	56	55	54	54	53	52	52	52	53
Dewpoint (°F)	56	57	58	59	59	58	58	57	56	55	55	54	54	53	53	53	52	52	51	51	50	50	50	51
Wind Chill (°F)
Surface Wind (mph)	8	9	9	9	10	10	10	10	10	10	10	10	10	15	15	15	13	13	13	11	11	11	14	14
Wind Dir	SSW	SW	SW	SW	SSW	SSW	SSW	S	S	S	S	S	S	SSE	SSE	SSE	SSW	SSW	SSW	S	S	S	S	S
Gust	18				20	20	20	20	20	20	23	23	23	32	32	32	23	23	23	22	22	22	26	26
Sky Cover (%)	84	82	82	82	82	82	82	84	84	84	85	85	85	93	93	93	93	93	93	82	82	82	78	78
Precipitation Potential (%)	69	61	61	61	71	71	71	76	76	76	76	76	76	89	89	89	89	89	89	64	64	64	64	64
Relative Humidity (%)	100	100	99	98	96	94	93	92	91	91	91	90	89	88	89	90	91	92	92	92	92	92	92	92
Rain	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Lkly	Lkly	Lkly	Lkly	Lkly
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

International System of Units Forecast Discussion 7-Day Forecast Hourly Weather Graph River Stage Summary 24 Hour Precipitation Summary NWS Office Map