Point Forecast: 2 Miles W Castro Valley CA  37.71N 122.08W (Elev. 397 ft)	Last Update: 1:26 pm PDT May 3, 2024

[hide menu]

Weather Elements Weather/Precipitation Temperature (°F) Dewpoint (°F) Heat Index (°F) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Fog Lightning Activity Level Trans. Wind  ktmphkm/hm/s 20ft Wind  ktmphkm/hm/s

48-Hour Period Starting: 6pm Fri, May 3 20247pm Fri, May 3 20248pm Fri, May 3 20249pm Fri, May 3 202410pm Fri, May 3 202411pm Fri, May 3 202412am Sat, May 4 20241am Sat, May 4 20242am Sat, May 4 20243am Sat, May 4 20244am Sat, May 4 20245am Sat, May 4 20246am Sat, May 4 20247am Sat, May 4 20248am Sat, May 4 20249am Sat, May 4 202410am Sat, May 4 202411am Sat, May 4 202412pm Sat, May 4 20241pm Sat, May 4 20242pm Sat, May 4 20243pm Sat, May 4 20244pm Sat, May 4 20245pm Sat, May 4 20246pm Sat, May 4 20247pm Sat, May 4 20248pm Sat, May 4 20249pm Sat, May 4 202410pm Sat, May 4 202411pm Sat, May 4 202412am Sun, May 5 20241am Sun, May 5 20242am Sun, May 5 20243am Sun, May 5 20244am Sun, May 5 20245am Sun, May 5 20246am Sun, May 5 20247am Sun, May 5 20248am Sun, May 5 20249am Sun, May 5 202410am Sun, May 5 202411am Sun, May 5 202412pm Sun, May 5 20241pm Sun, May 5 20242pm Sun, May 5 20243pm Sun, May 5 20244pm Sun, May 5 20245pm Sun, May 5 20246pm Sun, May 5 20247pm Sun, May 5 20248pm Sun, May 5 20249pm Sun, May 5 202410pm Sun, May 5 202411pm Sun, May 5 202412am Mon, May 6 20241am Mon, May 6 20242am Mon, May 6 20243am Mon, May 6 20244am Mon, May 6 20245am Mon, May 6 20246am Mon, May 6 20247am Mon, May 6 20248am Mon, May 6 20249am Mon, May 6 202410am Mon, May 6 202411am Mon, May 6 202412pm Mon, May 6 20241pm Mon, May 6 20242pm Mon, May 6 20243pm Mon, May 6 20244pm Mon, May 6 20245pm Mon, May 6 20246pm Mon, May 6 20247pm Mon, May 6 20248pm Mon, May 6 20249pm Mon, May 6 202410pm Mon, May 6 202411pm Mon, May 6 202412am Tue, May 7 20241am Tue, May 7 20242am Tue, May 7 20243am Tue, May 7 20244am Tue, May 7 20245am Tue, May 7 20246am Tue, May 7 20247am Tue, May 7 20248am Tue, May 7 20249am Tue, May 7 202410am Tue, May 7 202411am Tue, May 7 202412pm Tue, May 7 20241pm Tue, May 7 20242pm Tue, May 7 20243pm Tue, May 7 20244pm Tue, May 7 20245pm Tue, May 7 20246pm Tue, May 7 20247pm Tue, May 7 20248pm Tue, May 7 20249pm Tue, May 7 202410pm Tue, May 7 202411pm Tue, May 7 202412am Wed, May 8 20241am Wed, May 8 20242am Wed, May 8 20243am Wed, May 8 20244am Wed, May 8 20245am Wed, May 8 2024

Date	05/03						05/04
Hour (PDT)	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17
Temperature (°F)	66	61	58	56	55	55	55	55	55	54	54	54	52	54	55	54	53	53	55	53	53	54	54	54
Dewpoint (°F)	52	52	52	52	52	52	52	52	53	52	52	51	51	52	53	54	53	52	53	50	50	47	47	45
Heat Index (°F)
Surface Wind (mph)	11	10	10	9	9	9	9	9	10	10	10	11	14	15	18	16	16	17	15	15	14	15	15	16
Wind Dir	W	W	WSW	WSW	WSW	WSW	WSW	WSW	WSW	SW	SW	SSW	SSW	S	S	SW	W	W	WSW	WSW	W	W	W	W
Gust												18	20	23	28	24	24	25	23	23	21	22	23	24
Sky Cover (%)	5	11	34	65	74	86	88	88	93	92	93	98	98	98	98	98	98	94	93	93	93	93	93	57
Precipitation Potential (%)	0	0	0	0	0	8	8	8	8	8	8	97	97	97	97	97	97	89	89	89	89	89	89	2
Relative Humidity (%)	62	72	82	86	88	89	92	92	92	91	91	89	94	93	93	100	98	99	94	89	88	78	76	73
Rain	--	--	--	--	--	--	--	--	--	--	--	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date							05/05
Hour (PDT)	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17
Temperature (°F)	53	51	50	49	49	48	48	47	47	46	46	45	46	46	48	50	53	55	57	58	59	60	60	59
Dewpoint (°F)	45	44	44	44	43	42	42	42	42	41	41	41	41	41	41	41	41	41	41	41	41	42	42	43
Heat Index (°F)
Surface Wind (mph)	16	14	14	11	9	10	10	10	8	8	8	8	8	8	10	10	10	10	10	10	10	10	10	14
Wind Dir	W	W	W	W	W	W	W	W	W	W	W	W	W	W	WNW	WNW	WNW	WNW	WNW	WNW	W	W	W	W
Gust	23	22	22	18																				20
Sky Cover (%)	57	57	52	24	25	25	25	25	29	29	29	15	15	15	18	18	18	8	8	8	5	5	5	4
Precipitation Potential (%)	2	2	2	2	2	1	1	1	1	1	1	0	0	0	0	0	0	1	1	1	1	1	1	0
Relative Humidity (%)	74	77	78	81	81	80	81	82	83	84	85	84	84	82	78	72	65	59	55	53	52	52	53	55
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

International System of Units Forecast Discussion 7-Day Forecast Hourly Weather Graph Hourly River Stages Hourly Rainfall NWS Office Map Weather Calculator User Defined Area