Point Forecast: Mount St Helens WA  46.18N 122.18W (Elev. 1891 m)	Last Update: 3:45 pm PST Dec 14, 2025

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Weather Elements Weather/Precipitation Fire Weather Temperature (°C) Dewpoint (°C) Wind Chill (°C) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Snow Freezing Rain Sleet Fog Mixing Height  x100ftx100m Trans. Wind  ktmphkm/hm/s

48-Hour Period Starting: 4pm Sun, Dec 14 20255pm Sun, Dec 14 20256pm Sun, Dec 14 20257pm Sun, Dec 14 20258pm Sun, Dec 14 20259pm Sun, Dec 14 202510pm Sun, Dec 14 202511pm Sun, Dec 14 202512am Mon, Dec 15 20251am Mon, Dec 15 20252am Mon, Dec 15 20253am Mon, Dec 15 20254am Mon, Dec 15 20255am Mon, Dec 15 20256am Mon, Dec 15 20257am Mon, Dec 15 20258am Mon, Dec 15 20259am Mon, Dec 15 202510am Mon, Dec 15 202511am Mon, Dec 15 202512pm Mon, Dec 15 20251pm Mon, Dec 15 20252pm Mon, Dec 15 20253pm Mon, Dec 15 20254pm Mon, Dec 15 20255pm Mon, Dec 15 20256pm Mon, Dec 15 20257pm Mon, Dec 15 20258pm Mon, Dec 15 20259pm Mon, Dec 15 202510pm Mon, Dec 15 202511pm Mon, Dec 15 202512am Tue, Dec 16 20251am Tue, Dec 16 20252am Tue, Dec 16 20253am Tue, Dec 16 20254am Tue, Dec 16 20255am Tue, Dec 16 20256am Tue, Dec 16 20257am Tue, Dec 16 20258am Tue, Dec 16 20259am Tue, Dec 16 202510am Tue, Dec 16 202511am Tue, Dec 16 202512pm Tue, Dec 16 20251pm Tue, Dec 16 20252pm Tue, Dec 16 20253pm Tue, Dec 16 20254pm Tue, Dec 16 20255pm Tue, Dec 16 20256pm Tue, Dec 16 20257pm Tue, Dec 16 20258pm Tue, Dec 16 20259pm Tue, Dec 16 202510pm Tue, Dec 16 202511pm Tue, Dec 16 202512am Wed, Dec 17 20251am Wed, Dec 17 20252am Wed, Dec 17 20253am Wed, Dec 17 20254am Wed, Dec 17 20255am Wed, Dec 17 20256am Wed, Dec 17 20257am Wed, Dec 17 20258am Wed, Dec 17 20259am Wed, Dec 17 202510am Wed, Dec 17 202511am Wed, Dec 17 202512pm Wed, Dec 17 20251pm Wed, Dec 17 20252pm Wed, Dec 17 20253pm Wed, Dec 17 20254pm Wed, Dec 17 20255pm Wed, Dec 17 20256pm Wed, Dec 17 20257pm Wed, Dec 17 20258pm Wed, Dec 17 20259pm Wed, Dec 17 202510pm Wed, Dec 17 202511pm Wed, Dec 17 202512am Thu, Dec 18 20251am Thu, Dec 18 20252am Thu, Dec 18 20253am Thu, Dec 18 20254am Thu, Dec 18 20255am Thu, Dec 18 20256am Thu, Dec 18 20257am Thu, Dec 18 20258am Thu, Dec 18 20259am Thu, Dec 18 202510am Thu, Dec 18 202511am Thu, Dec 18 202512pm Thu, Dec 18 20251pm Thu, Dec 18 20252pm Thu, Dec 18 20253pm Thu, Dec 18 20254pm Thu, Dec 18 20255pm Thu, Dec 18 20256pm Thu, Dec 18 20257pm Thu, Dec 18 20258pm Thu, Dec 18 20259pm Thu, Dec 18 202510pm Thu, Dec 18 202511pm Thu, Dec 18 202512am Fri, Dec 19 20251am Fri, Dec 19 20252am Fri, Dec 19 20253am Fri, Dec 19 2025

Date	12/14								12/15
Hour (PST)	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15
Temperature (°C)	2	2	2	2	2	2	2	2	2	2	2	3	3	3	3	3	3	4	4	4	3	4	3	3
Dewpoint (°C)	1	1	1	1	0	-1	-1	-1	0	0	0	1	1	1	1	2	2	2	3	3	3	3	3	3
Wind Chill (°C)	-2	-3	-3	-3	-3	-3	-3	-4	-4	-4	-4	-3	-3	-3	-3	-3	-3	-2	-2	-2	-3	-2	-4	-4
Surface Wind (mph)	8	10	11	15	15	17	18	21	22	23	23	24	24	24	24	24	25	26	25	26	26	26	28	28
Wind Dir	SW	SW	SW	SW	SW	SW	SW	SSW	SSW	SSW	SSW	SW	SW	SW	SSW	SW	SW	SW	SW	SW	SW	SW	SW	SW
Gust									29	31	31	33	33	34	36	36	40	44	45	43	41	41	41	41
Sky Cover (%)	83	73	72	82	67	65	75	82	86	88	92	94	100	98	96	100	100	97	99	89	85	86	86	87
Precipitation Potential (%)	16	17	16	14	20	34	62	72	75	82	87	90	99	96	94	99	99	95	98	83	72	70	75	68
Relative Humidity (%)	92	95	91	87	86	83	80	83	85	85	84	84	86	86	87	89	90	88	91	98	98	98	100	100
Rain	SChc	SChc	SChc	--	SChc	Chc	Lkly	Lkly	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Lkly	Lkly	Ocnl	Lkly
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date									12/16
Hour (PST)	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15
Temperature (°C)	2	2	1	1	1	1	0	0	1	1	1	0	0	1	1	1	2	2	2	2	2	2	2	2
Dewpoint (°C)	2	2	1	0	-1	-1	-2	-2	-1	-2	-2	-2	-2	-1	-1	-1	0	0	0	1	1	1	2	2
Wind Chill (°C)	-5	-6	-6	-6	-6	-6	-6	-6	-6	-6	-6	-6	-7	-6	-5	-5	-4	-4	-4	-4	-4	-5	-5	-5
Surface Wind (mph)	28	28	28	23	23	23	16	16	16	17	17	17	20	20	20	20	20	20	21	21	21	23	23	23
Wind Dir	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW
Gust	39	39	39	34	34	34							29	29	29	29	29	29	32	32	32	36	36	36
Sky Cover (%)	100	100	100	100	100	100	97	97	97	97	97	97	98	98	98	98	98	98	100	100	100	100	100	100
Precipitation Potential (%)	99	99	99	99	99	99	95	95	95	95	95	95	97	97	97	97	97	97	100	100	100	100	100	100
Relative Humidity (%)	99	100	95	95	94	92	90	88	87	86	86	87	87	87	86	86	87	88	90	93	96	98	99	100
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	SChc	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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