Point Forecast: Lewistown MT  47.07N 109.43W (Elev. 3898 ft)	Last Update: 3:13 am MST Jan 19, 2025

[hide menu]

Weather Elements Fire Weather Aviation Weather Temperature (°F) Dewpoint (°F) Wind Chill (°F) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Snow Freezing Rain Sleet Fog Mixing Height  x100ftx100m Haines Index Trans. Wind  ktmphkm/hm/s Vent Rate (x1000 mph-ft) Grassland Fire Danger Index Ceiling Height Visibility

48-Hour Period Starting: 4am Sun, Jan 19 20255am Sun, Jan 19 20256am Sun, Jan 19 20257am Sun, Jan 19 20258am Sun, Jan 19 20259am Sun, Jan 19 202510am Sun, Jan 19 202511am Sun, Jan 19 202512pm Sun, Jan 19 20251pm Sun, Jan 19 20252pm Sun, Jan 19 20253pm Sun, Jan 19 20254pm Sun, Jan 19 20255pm Sun, Jan 19 20256pm Sun, Jan 19 20257pm Sun, Jan 19 20258pm Sun, Jan 19 20259pm Sun, Jan 19 202510pm Sun, Jan 19 202511pm Sun, Jan 19 202512am Mon, Jan 20 20251am Mon, Jan 20 20252am Mon, Jan 20 20253am Mon, Jan 20 20254am Mon, Jan 20 20255am Mon, Jan 20 20256am Mon, Jan 20 20257am Mon, Jan 20 20258am Mon, Jan 20 20259am Mon, Jan 20 202510am Mon, Jan 20 202511am Mon, Jan 20 202512pm Mon, Jan 20 20251pm Mon, Jan 20 20252pm Mon, Jan 20 20253pm Mon, Jan 20 20254pm Mon, Jan 20 20255pm Mon, Jan 20 20256pm Mon, Jan 20 20257pm Mon, Jan 20 20258pm Mon, Jan 20 20259pm Mon, Jan 20 202510pm Mon, Jan 20 202511pm Mon, Jan 20 202512am Tue, Jan 21 20251am Tue, Jan 21 20252am Tue, Jan 21 20253am Tue, Jan 21 20254am Tue, Jan 21 20255am Tue, Jan 21 20256am Tue, Jan 21 20257am Tue, Jan 21 20258am Tue, Jan 21 20259am Tue, Jan 21 202510am Tue, Jan 21 202511am Tue, Jan 21 202512pm Tue, Jan 21 20251pm Tue, Jan 21 20252pm Tue, Jan 21 20253pm Tue, Jan 21 20254pm Tue, Jan 21 20255pm Tue, Jan 21 20256pm Tue, Jan 21 20257pm Tue, Jan 21 20258pm Tue, Jan 21 20259pm Tue, Jan 21 202510pm Tue, Jan 21 202511pm Tue, Jan 21 202512am Wed, Jan 22 20251am Wed, Jan 22 20252am Wed, Jan 22 20253am Wed, Jan 22 20254am Wed, Jan 22 20255am Wed, Jan 22 20256am Wed, Jan 22 20257am Wed, Jan 22 20258am Wed, Jan 22 20259am Wed, Jan 22 202510am Wed, Jan 22 202511am Wed, Jan 22 202512pm Wed, Jan 22 20251pm Wed, Jan 22 20252pm Wed, Jan 22 20253pm Wed, Jan 22 20254pm Wed, Jan 22 20255pm Wed, Jan 22 20256pm Wed, Jan 22 20257pm Wed, Jan 22 20258pm Wed, Jan 22 20259pm Wed, Jan 22 202510pm Wed, Jan 22 202511pm Wed, Jan 22 202512am Thu, Jan 23 20251am Thu, Jan 23 20252am Thu, Jan 23 20253am Thu, Jan 23 20254am Thu, Jan 23 20255am Thu, Jan 23 20256am Thu, Jan 23 20257am Thu, Jan 23 20258am Thu, Jan 23 20259am Thu, Jan 23 202510am Thu, Jan 23 202511am Thu, Jan 23 202512pm Thu, Jan 23 20251pm Thu, Jan 23 20252pm Thu, Jan 23 20253pm Thu, Jan 23 2025

Date	01/19																				01/20
Hour (MST)	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03
Temperature (°F)	-5	-5	-3	-1	-1	0	2	3	4	5	3	3	2	-3	-5	-7	-8	-9	-9	-9	-9	-9	-10	-10
Dewpoint (°F)	-11	-9	-9	-5	-5	-4	-1	-1	-2	-1	-3	-4	-4	-8	-10	-12	-13	-14	-14	-14	-14	-15	-15	-16
Wind Chill (°F)	-5	-5	-3	-1	-1	0	-5	-6	-7	-8	-12	-13	-14	-20	-22	-24	-24	-25	-24	-24	-24	-24	-25	-25
Surface Wind (mph)	2	2	2	2	2	2	3	5	6	8	9	10	10	10	10	9	8	8	7	7	7	7	7	7
Wind Dir	SSE	S	W	W	W	WNW	WNW	WNW	NW	NW	NW	NW	NW	NW	WNW	WNW	WNW	W	W	W	W	W	W	W
Gust												20	20	20	20
Sky Cover (%)	78	77	85	92	94	92	81	84	82	77	80	80	75	73	71	74	75	77	73	79	80	77	78	71
Precipitation Potential (%)	0	0	6	12	24	35	34	29	24	20	13	11	8	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	75	79	77	79	81	84	87	81	77	75	75	74	75	79	79	79	79	79	79	79	78	75	77	75
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	SChc	Chc	Chc	Chc	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																					01/21
Hour (MST)	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03
Temperature (°F)	-10	-13	-13	-13	-15	-9	-6	0	4	7	8	6	4	2	0	0	0	0	2	3	6	9	12	13
Dewpoint (°F)	-16	-19	-19	-19	-22	-16	-15	-11	-9	-9	-9	-10	-10	-11	-12	-12	-12	-12	-11	-9	-6	-4	-1	1
Wind Chill (°F)	-23	-27	-27	-27	-30	-23	-19	-12	-6	-3	-3	-4	-7	-10	-11	-12	-14	-14	-12	-10	-7	-3	-1	1
Surface Wind (mph)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	8	8	8	8	8	8	9	9
Wind Dir	W	W	W	W	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SW	SW
Gust
Sky Cover (%)	66	59	52	40	29	22	13	4	4	4	6	6	6	18	18	18	33	33	33	55	55	55	70	70
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 (%)	74	74	74	74	72	71	65	60	54	48	45	47	50	54	55	55	55	55	56	56	56	56	56	56
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

International System of Units Forecast Discussion 7-Day Forecast Hourly Weather Graph Zone Forecast User Defined Area