Point Forecast: 3 Miles SW Petaluma CA  38.21N 122.67W (Elev. 341 ft)	Last Update: 1:26 am PDT Sep 15, 2026

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

48-Hour Period Starting: 1am Tue, Sep 15 20262am Tue, Sep 15 20263am Tue, Sep 15 20264am Tue, Sep 15 20265am Tue, Sep 15 20266am Tue, Sep 15 20267am Tue, Sep 15 20268am Tue, Sep 15 20269am Tue, Sep 15 202610am Tue, Sep 15 202611am Tue, Sep 15 202612pm Tue, Sep 15 20261pm Tue, Sep 15 20262pm Tue, Sep 15 20263pm Tue, Sep 15 20264pm Tue, Sep 15 20265pm Tue, Sep 15 20266pm Tue, Sep 15 20267pm Tue, Sep 15 20268pm Tue, Sep 15 20269pm Tue, Sep 15 202610pm Tue, Sep 15 202611pm Tue, Sep 15 202612am Wed, Sep 16 20261am Wed, Sep 16 20262am Wed, Sep 16 20263am Wed, Sep 16 20264am Wed, Sep 16 20265am Wed, Sep 16 20266am Wed, Sep 16 20267am Wed, Sep 16 20268am Wed, Sep 16 20269am Wed, Sep 16 202610am Wed, Sep 16 202611am Wed, Sep 16 202612pm Wed, Sep 16 20261pm Wed, Sep 16 20262pm Wed, Sep 16 20263pm Wed, Sep 16 20264pm Wed, Sep 16 20265pm Wed, Sep 16 20266pm Wed, Sep 16 20267pm Wed, Sep 16 20268pm Wed, Sep 16 20269pm Wed, Sep 16 202610pm Wed, Sep 16 202611pm Wed, Sep 16 202612am Thu, Sep 17 20261am Thu, Sep 17 20262am Thu, Sep 17 20263am Thu, Sep 17 20264am Thu, Sep 17 20265am Thu, Sep 17 20266am Thu, Sep 17 20267am Thu, Sep 17 20268am Thu, Sep 17 20269am Thu, Sep 17 202610am Thu, Sep 17 202611am Thu, Sep 17 202612pm Thu, Sep 17 20261pm Thu, Sep 17 20262pm Thu, Sep 17 20263pm Thu, Sep 17 20264pm Thu, Sep 17 20265pm Thu, Sep 17 20266pm Thu, Sep 17 20267pm Thu, Sep 17 20268pm Thu, Sep 17 20269pm Thu, Sep 17 202610pm Thu, Sep 17 202611pm Thu, Sep 17 202612am Fri, Sep 18 20261am Fri, Sep 18 20262am Fri, Sep 18 20263am Fri, Sep 18 20264am Fri, Sep 18 20265am Fri, Sep 18 20266am Fri, Sep 18 20267am Fri, Sep 18 20268am Fri, Sep 18 20269am Fri, Sep 18 202610am Fri, Sep 18 202611am Fri, Sep 18 202612pm Fri, Sep 18 20261pm Fri, Sep 18 20262pm Fri, Sep 18 20263pm Fri, Sep 18 20264pm Fri, Sep 18 20265pm Fri, Sep 18 20266pm Fri, Sep 18 20267pm Fri, Sep 18 20268pm Fri, Sep 18 20269pm Fri, Sep 18 202610pm Fri, Sep 18 202611pm Fri, Sep 18 202612am Sat, Sep 19 20261am Sat, Sep 19 20262am Sat, Sep 19 20263am Sat, Sep 19 20264am Sat, Sep 19 20265am Sat, Sep 19 20266am Sat, Sep 19 20267am Sat, Sep 19 20268am Sat, Sep 19 20269am Sat, Sep 19 202610am Sat, Sep 19 202611am Sat, Sep 19 202612pm Sat, Sep 19 2026

Date	09/15																							09/16
Hour (PDT)	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00
Temperature (°F)	55	54	53	52	52	52	52	53	56	62	68	75	78	79	80	77	74	71	62	58	57	56	55	54
Dewpoint (°F)	53	52	52	51	51	51	52	53	54	55	55	55	53	52	54	54	56	57	55	54	54	54	54	54
Heat Index (°F)												75	78	79	80	77
Surface Wind (mph)	1	1	1	0	0	0	0	1	1	1	1	2	2	5	7	8	9	8	5	3	2	2	2	2
Wind Dir	WSW	WSW	WSW	SW	SW	SSW	SSW	SSE	SE	ESE	SE	SE	SSW	WSW	WSW	WSW	W	W	WSW	WSW	WSW	SW	SW	SW
Gust
Sky Cover (%)	14	18	17	26	34	41	48	32	30	17	10	3	0	0	1	2	2	1	8	19	18	32	36	41
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0
Relative Humidity (%)	92	94	96	95	98	99	100	99	92	77	62	49	41	40	41	45	53	62	75	87	92	96	98	100
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																								09/17
Hour (PDT)	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00
Temperature (°F)	54	53	53	52	52	52	51	53	55	59	64	69	71	71	72	69	67	65	61	57	56	56	57	56
Dewpoint (°F)	54	53	53	52	52	52	51	53	54	56	56	56	56	56	58	57	58	58	57	56	55	55	56	55
Heat Index (°F)
Surface Wind (mph)	1	1	1	1	1	1	1	2	2	3	6	6	6	13	13	13	11	11	11	6	6	6	3	3
Wind Dir	SW	SW	S	SSW	SSW	SSE	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	W	W	W	WSW	WSW	WSW	WSW	WSW
Gust														23	23	23	22	22	22
Sky Cover (%)	44	49	45	49	60	61	66	49	54	37	26	26	26	23	23	23	54	54	54	28	28	28	50	50
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	3	3	3	3	3	3	1	1
Relative Humidity (%)	100	100	100	99	100	100	100	100	96	88	75	64	59	59	62	66	72	77	86	94	97	97	96	96
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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