Point Forecast: Lewistown MT  47.07N 109.43W (Elev. 3898 ft)	Last Update: 8:15 am MST Jan 20, 2026

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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 Trans. Wind  ktmphkm/hm/s Vent Rate (x1000 mph-ft) Grassland Fire Danger Index Ceiling Height Visibility

48-Hour Period Starting: 9am Tue, Jan 20 202610am Tue, Jan 20 202611am Tue, Jan 20 202612pm Tue, Jan 20 20261pm Tue, Jan 20 20262pm Tue, Jan 20 20263pm Tue, Jan 20 20264pm Tue, Jan 20 20265pm Tue, Jan 20 20266pm Tue, Jan 20 20267pm Tue, Jan 20 20268pm Tue, Jan 20 20269pm Tue, Jan 20 202610pm Tue, Jan 20 202611pm Tue, Jan 20 202612am Wed, Jan 21 20261am Wed, Jan 21 20262am Wed, Jan 21 20263am Wed, Jan 21 20264am Wed, Jan 21 20265am Wed, Jan 21 20266am Wed, Jan 21 20267am Wed, Jan 21 20268am Wed, Jan 21 20269am Wed, Jan 21 202610am Wed, Jan 21 202611am Wed, Jan 21 202612pm Wed, Jan 21 20261pm Wed, Jan 21 20262pm Wed, Jan 21 20263pm Wed, Jan 21 20264pm Wed, Jan 21 20265pm Wed, Jan 21 20266pm Wed, Jan 21 20267pm Wed, Jan 21 20268pm Wed, Jan 21 20269pm Wed, Jan 21 202610pm Wed, Jan 21 202611pm Wed, Jan 21 202612am Thu, Jan 22 20261am Thu, Jan 22 20262am Thu, Jan 22 20263am Thu, Jan 22 20264am Thu, Jan 22 20265am Thu, Jan 22 20266am Thu, Jan 22 20267am Thu, Jan 22 20268am Thu, Jan 22 20269am Thu, Jan 22 202610am Thu, Jan 22 202611am Thu, Jan 22 202612pm Thu, Jan 22 20261pm Thu, Jan 22 20262pm Thu, Jan 22 20263pm Thu, Jan 22 20264pm Thu, Jan 22 20265pm Thu, Jan 22 20266pm Thu, Jan 22 20267pm Thu, Jan 22 20268pm Thu, Jan 22 20269pm Thu, Jan 22 202610pm Thu, Jan 22 202611pm Thu, Jan 22 202612am Fri, Jan 23 20261am Fri, Jan 23 20262am Fri, Jan 23 20263am Fri, Jan 23 20264am Fri, Jan 23 20265am Fri, Jan 23 20266am Fri, Jan 23 20267am Fri, Jan 23 20268am Fri, Jan 23 20269am Fri, Jan 23 202610am Fri, Jan 23 202611am Fri, Jan 23 202612pm Fri, Jan 23 20261pm Fri, Jan 23 20262pm Fri, Jan 23 20263pm Fri, Jan 23 20264pm Fri, Jan 23 20265pm Fri, Jan 23 20266pm Fri, Jan 23 20267pm Fri, Jan 23 20268pm Fri, Jan 23 20269pm Fri, Jan 23 202610pm Fri, Jan 23 202611pm Fri, Jan 23 202612am Sat, Jan 24 20261am Sat, Jan 24 20262am Sat, Jan 24 20263am Sat, Jan 24 20264am Sat, Jan 24 20265am Sat, Jan 24 20266am Sat, Jan 24 20267am Sat, Jan 24 20268am Sat, Jan 24 20269am Sat, Jan 24 202610am Sat, Jan 24 202611am Sat, Jan 24 202612pm Sat, Jan 24 20261pm Sat, Jan 24 20262pm Sat, Jan 24 20263pm Sat, Jan 24 20264pm Sat, Jan 24 20265pm Sat, Jan 24 20266pm Sat, Jan 24 20267pm Sat, Jan 24 20268pm Sat, Jan 24 2026

Date	01/20															01/21
Hour (MST)	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08
Temperature (°F)	26	27	27	28	30	27	27	27	25	23	22	21	22	22	24	25	26	27	25	22	20	20	16	17
Dewpoint (°F)	21	22	22	20	21	18	17	16	15	14	13	12	12	11	11	10	10	11	12	10	11	10	8	9
Wind Chill (°F)	11	12	13	13	16	13	14	14	12	11	12	11	12	12	14	14	14	15	11	7	5	4	1	2
Surface Wind (mph)	22	23	22	23	23	22	21	18	16	14	10	8	9	9	10	11	14	16	18	20	20	20	17	16
Wind Dir	NW	NW	NW	WNW	WNW	WNW	WNW	WNW	WNW	W	W	WSW	WSW	SW	WSW	W	W	WNW	NW	NW	NW	NW	NW	NW
Gust	37	38	34	36	36	34	33	31	28	25	21		18	18	20	22	25	29	31	31	32	31	30	29
Sky Cover (%)	91	92	87	89	88	87	88	81	75	47	28	10	12	18	24	24	24	79	74	79	70	70	70	81
Precipitation Potential (%)	50	33	12	8	6	3	1	1	0	0	0	0	0	0	0	1	1	2	3	3	3	3	3	3
Relative Humidity (%)	81	83	81	74	70	68	65	63	65	68	66	68	64	62	57	53	51	51	57	60	66	67	69	69
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	Chc	Chc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																01/22
Hour (MST)	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08
Temperature (°F)	18	20	22	24	25	25	24	22	20	19	18	17	16	16	15	15	15	14	13	11	10	8	6	6
Dewpoint (°F)	10	10	10	9	8	7	6	5	5	6	6	7	7	6	6	6	5	4	3	2	1	-1	-1	-2
Wind Chill (°F)	4	7	9	11	13	13	11	9	10	9	8	10	9	8	8	7	7	6	5	3	1	-1	-2	-2
Surface Wind (mph)	15	14	14	14	14	14	14	14	8	8	8	5	5	5	5	5	5	5	5	5	5	5	5	5
Wind Dir	NW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	W	W	W	W	W	W	WNW	WNW	WNW	WNW	WNW	WNW	WNW
Gust	28	26	26	26	26	26	26	26	18	18	18
Sky Cover (%)	81	81	62	62	62	44	44	44	49	49	49	54	54	54	69	69	69	65	65	65	65	65	65	53
Precipitation Potential (%)	3	3	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	2	2	2	2
Relative Humidity (%)	70	66	60	54	49	46	46	49	52	56	60	63	65	67	67	66	65	64	64	65	66	68	69	69
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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