Point Forecast: Antioch CA  38N 121.81W (Elev. 36 ft)	Last Update: 2:31 am PDT Aug 19, 2026

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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 Trans. Wind  ktmphkm/hm/s 20ft Wind  ktmphkm/hm/s

48-Hour Period Starting: 5am Wed, Aug 19 20266am Wed, Aug 19 20267am Wed, Aug 19 20268am Wed, Aug 19 20269am Wed, Aug 19 202610am Wed, Aug 19 202611am Wed, Aug 19 202612pm Wed, Aug 19 20261pm Wed, Aug 19 20262pm Wed, Aug 19 20263pm Wed, Aug 19 20264pm Wed, Aug 19 20265pm Wed, Aug 19 20266pm Wed, Aug 19 20267pm Wed, Aug 19 20268pm Wed, Aug 19 20269pm Wed, Aug 19 202610pm Wed, Aug 19 202611pm Wed, Aug 19 202612am Thu, Aug 20 20261am Thu, Aug 20 20262am Thu, Aug 20 20263am Thu, Aug 20 20264am Thu, Aug 20 20265am Thu, Aug 20 20266am Thu, Aug 20 20267am Thu, Aug 20 20268am Thu, Aug 20 20269am Thu, Aug 20 202610am Thu, Aug 20 202611am Thu, Aug 20 202612pm Thu, Aug 20 20261pm Thu, Aug 20 20262pm Thu, Aug 20 20263pm Thu, Aug 20 20264pm Thu, Aug 20 20265pm Thu, Aug 20 20266pm Thu, Aug 20 20267pm Thu, Aug 20 20268pm Thu, Aug 20 20269pm Thu, Aug 20 202610pm Thu, Aug 20 202611pm Thu, Aug 20 202612am Fri, Aug 21 20261am Fri, Aug 21 20262am Fri, Aug 21 20263am Fri, Aug 21 20264am Fri, Aug 21 20265am Fri, Aug 21 20266am Fri, Aug 21 20267am Fri, Aug 21 20268am Fri, Aug 21 20269am Fri, Aug 21 202610am Fri, Aug 21 202611am Fri, Aug 21 202612pm Fri, Aug 21 20261pm Fri, Aug 21 20262pm Fri, Aug 21 20263pm Fri, Aug 21 20264pm Fri, Aug 21 20265pm Fri, Aug 21 20266pm Fri, Aug 21 20267pm Fri, Aug 21 20268pm Fri, Aug 21 20269pm Fri, Aug 21 202610pm Fri, Aug 21 202611pm Fri, Aug 21 202612am Sat, Aug 22 20261am Sat, Aug 22 20262am Sat, Aug 22 20263am Sat, Aug 22 20264am Sat, Aug 22 20265am Sat, Aug 22 20266am Sat, Aug 22 20267am Sat, Aug 22 20268am Sat, Aug 22 20269am Sat, Aug 22 202610am Sat, Aug 22 202611am Sat, Aug 22 202612pm Sat, Aug 22 20261pm Sat, Aug 22 20262pm Sat, Aug 22 20263pm Sat, Aug 22 20264pm Sat, Aug 22 20265pm Sat, Aug 22 20266pm Sat, Aug 22 20267pm Sat, Aug 22 20268pm Sat, Aug 22 20269pm Sat, Aug 22 202610pm Sat, Aug 22 202611pm Sat, Aug 22 202612am Sun, Aug 23 20261am Sun, Aug 23 20262am Sun, Aug 23 20263am Sun, Aug 23 20264am Sun, Aug 23 20265am Sun, Aug 23 20266am Sun, Aug 23 20267am Sun, Aug 23 20268am Sun, Aug 23 20269am Sun, Aug 23 202610am Sun, Aug 23 202611am Sun, Aug 23 202612pm Sun, Aug 23 20261pm Sun, Aug 23 20262pm Sun, Aug 23 20263pm Sun, Aug 23 20264pm Sun, Aug 23 2026

Date	08/19																			08/20
Hour (PDT)	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04
Temperature (°F)	64	64	64	66	69	74	78	82	87	89	91	93	92	90	87	81	77	74	72	71	70	68	67	65
Dewpoint (°F)	55	55	55	56	57	58	59	59	59	58	56	54	53	54	54	53	54	54	54	54	55	55	56	56
Heat Index (°F)							79	82	86	88	90	90	90	88	85	80	77
Surface Wind (mph)	5	5	5	5	5	6	7	8	8	9	10	11	11	10	9	9	8	8	8	7	7	6	6	7
Wind Dir	W	W	W	W	WNW	WNW	WNW	WNW	WNW	WNW	WNW	W	W	W	W	W	W	W	W	W	W	WNW	W	W
Gust												18	20	18
Sky Cover (%)	70	41	19	6	4	2	2	0	0	0	1	0	2	6	4	2	9	20	23	27	17	19	4	4
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 (%)	73	73	73	72	66	56	51	46	40	35	30	27	26	30	32	38	44	48	52	56	60	63	67	71
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																				08/21
Hour (PDT)	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04
Temperature (°F)	65	64	64	66	68	73	77	80	84	86	88	89	88	86	82	78	75	72	71	69	68	67	66	65
Dewpoint (°F)	56	55	55	56	57	58	59	59	60	59	58	57	56	56	55	54	53	53	53	53	53	54	54	54
Heat Index (°F)							77	80	84	86	87	88	87	85	82	78	75
Surface Wind (mph)	7	7	7	8	8	8	10	10	10	11	11	11	11	11	11	9	9	9	9	9	9	9	9	9
Wind Dir	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW
Gust							18	18	18	20	20	20	21	21	21
Sky Cover (%)	62	62	62	44	44	44	54	54	54	56	56	56	29	29	29	48	48	48	45	45	45	51	51	51
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 (%)	72	72	72	72	66	59	54	50	45	40	36	34	34	36	39	43	47	50	54	57	59	62	65	68
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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