Point Forecast: 4 Miles S Portola Valley CA  37.3N 122.23W (Elev. 1447 ft)	Last Update: 8:47 pm PDT May 21, 2024

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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: 10pm Tue, May 21 202411pm Tue, May 21 202412am Wed, May 22 20241am Wed, May 22 20242am Wed, May 22 20243am Wed, May 22 20244am Wed, May 22 20245am Wed, May 22 20246am Wed, May 22 20247am Wed, May 22 20248am Wed, May 22 20249am Wed, May 22 202410am Wed, May 22 202411am Wed, May 22 202412pm Wed, May 22 20241pm Wed, May 22 20242pm Wed, May 22 20243pm Wed, May 22 20244pm Wed, May 22 20245pm Wed, May 22 20246pm Wed, May 22 20247pm Wed, May 22 20248pm Wed, May 22 20249pm Wed, May 22 202410pm Wed, May 22 202411pm Wed, May 22 202412am Thu, May 23 20241am Thu, May 23 20242am Thu, May 23 20243am Thu, May 23 20244am Thu, May 23 20245am Thu, May 23 20246am Thu, May 23 20247am Thu, May 23 20248am Thu, May 23 20249am Thu, May 23 202410am Thu, May 23 202411am Thu, May 23 202412pm Thu, May 23 20241pm Thu, May 23 20242pm Thu, May 23 20243pm Thu, May 23 20244pm Thu, May 23 20245pm Thu, May 23 20246pm Thu, May 23 20247pm Thu, May 23 20248pm Thu, May 23 20249pm Thu, May 23 202410pm Thu, May 23 202411pm Thu, May 23 202412am Fri, May 24 20241am Fri, May 24 20242am Fri, May 24 20243am Fri, May 24 20244am Fri, May 24 20245am Fri, May 24 20246am Fri, May 24 20247am Fri, May 24 20248am Fri, May 24 20249am Fri, May 24 202410am Fri, May 24 202411am Fri, May 24 202412pm Fri, May 24 20241pm Fri, May 24 20242pm Fri, May 24 20243pm Fri, May 24 20244pm Fri, May 24 20245pm Fri, May 24 20246pm Fri, May 24 20247pm Fri, May 24 20248pm Fri, May 24 20249pm Fri, May 24 202410pm Fri, May 24 202411pm Fri, May 24 202412am Sat, May 25 20241am Sat, May 25 20242am Sat, May 25 20243am Sat, May 25 20244am Sat, May 25 20245am Sat, May 25 20246am Sat, May 25 20247am Sat, May 25 20248am Sat, May 25 20249am Sat, May 25 202410am Sat, May 25 202411am Sat, May 25 202412pm Sat, May 25 20241pm Sat, May 25 20242pm Sat, May 25 20243pm Sat, May 25 20244pm Sat, May 25 20245pm Sat, May 25 20246pm Sat, May 25 20247pm Sat, May 25 20248pm Sat, May 25 20249pm Sat, May 25 202410pm Sat, May 25 202411pm Sat, May 25 202412am Sun, May 26 20241am Sun, May 26 20242am Sun, May 26 20243am Sun, May 26 20244am Sun, May 26 20245am Sun, May 26 20246am Sun, May 26 20247am Sun, May 26 20248am Sun, May 26 20249am Sun, May 26 2024

Date	05/21		05/22
Hour (PDT)	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21
Temperature (°F)	55	54	53	51	51	50	48	49	49	50	53	56	59	62	63	63	64	62	61	59	56	53	51	49
Dewpoint (°F)	42	42	42	41	42	42	42	44	44	44	46	48	50	52	52	53	54	53	52	52	49	47	46	45
Heat Index (°F)
Surface Wind (mph)	2	2	2	2	2	2	2	2	2	3	5	5	6	7	7	8	8	8	8	8	7	7	7	7
Wind Dir	NW	WNW	WNW	WNW	W	W	WNW	W	WNW	WNW	W	W	W	W	W	W	W	W	W	W	W	WNW	WNW	WNW
Gust																20	20	21	21	21	21	20	20	18
Sky Cover (%)	15	14	16	13	15	18	19	25	28	30	20	19	14	8	9	9	10	10	12	18	26	32	43	32
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	0	0	0	0	0
Relative Humidity (%)	62	63	67	68	72	75	80	84	84	80	77	76	72	70	67	69	71	73	73	75	78	81	83	84
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date			05/23
Hour (PDT)	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21
Temperature (°F)		48			48			48			51			59			60			58			50
Dewpoint (°F)	44	43	42	42	41	40	40	40	40	41	42	43	44	45	46	46	47	47	47	47	46	45	44	43
Heat Index (°F)
Surface Wind (mph)	7	6	6	6	5	5	5	5	5	5	6	6	6	7	7	7	8	8	8	8	8	8	7	7
Wind Dir	WNW	WNW	WNW	WNW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW
Gust	18																21	21	21	20	20	20
Sky Cover (%)	23	14	14	14	15	15	15	19	19	19	21	21	21	10	10	10	8	8	8	23	23	23	39	39
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	83	81	79	77	76	75	75	75	74	72	70	66	62	60	59	59	60	61	63	66	70	74	78	80
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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