weather.gov

Home

News

Organization

Search for:  NWSAll NOAA

Point Forecast: Lewistown MT  47.07N 109.43W (Elev. 3898 ft)	Last Update: 11:15 pm MDT Oct 20, 2020

[hide menu]  |  Font Size: A A A

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: 11pm Tue, Oct 20 202012am Wed, Oct 21 20201am Wed, Oct 21 20202am Wed, Oct 21 20203am Wed, Oct 21 20204am Wed, Oct 21 20205am Wed, Oct 21 20206am Wed, Oct 21 20207am Wed, Oct 21 20208am Wed, Oct 21 20209am Wed, Oct 21 202010am Wed, Oct 21 202011am Wed, Oct 21 202012pm Wed, Oct 21 20201pm Wed, Oct 21 20202pm Wed, Oct 21 20203pm Wed, Oct 21 20204pm Wed, Oct 21 20205pm Wed, Oct 21 20206pm Wed, Oct 21 20207pm Wed, Oct 21 20208pm Wed, Oct 21 20209pm Wed, Oct 21 202010pm Wed, Oct 21 202011pm Wed, Oct 21 202012am Thu, Oct 22 20201am Thu, Oct 22 20202am Thu, Oct 22 20203am Thu, Oct 22 20204am Thu, Oct 22 20205am Thu, Oct 22 20206am Thu, Oct 22 20207am Thu, Oct 22 20208am Thu, Oct 22 20209am Thu, Oct 22 202010am Thu, Oct 22 202011am Thu, Oct 22 202012pm Thu, Oct 22 20201pm Thu, Oct 22 20202pm Thu, Oct 22 20203pm Thu, Oct 22 20204pm Thu, Oct 22 20205pm Thu, Oct 22 20206pm Thu, Oct 22 20207pm Thu, Oct 22 20208pm Thu, Oct 22 20209pm Thu, Oct 22 202010pm Thu, Oct 22 202011pm Thu, Oct 22 202012am Fri, Oct 23 20201am Fri, Oct 23 20202am Fri, Oct 23 20203am Fri, Oct 23 20204am Fri, Oct 23 20205am Fri, Oct 23 20206am Fri, Oct 23 20207am Fri, Oct 23 20208am Fri, Oct 23 20209am Fri, Oct 23 202010am Fri, Oct 23 202011am Fri, Oct 23 202012pm Fri, Oct 23 20201pm Fri, Oct 23 20202pm Fri, Oct 23 20203pm Fri, Oct 23 20204pm Fri, Oct 23 20205pm Fri, Oct 23 20206pm Fri, Oct 23 20207pm Fri, Oct 23 20208pm Fri, Oct 23 20209pm Fri, Oct 23 202010pm Fri, Oct 23 202011pm Fri, Oct 23 202012am Sat, Oct 24 20201am Sat, Oct 24 20202am Sat, Oct 24 20203am Sat, Oct 24 20204am Sat, Oct 24 20205am Sat, Oct 24 20206am Sat, Oct 24 20207am Sat, Oct 24 20208am Sat, Oct 24 20209am Sat, Oct 24 202010am Sat, Oct 24 202011am Sat, Oct 24 202012pm Sat, Oct 24 20201pm Sat, Oct 24 20202pm Sat, Oct 24 20203pm Sat, Oct 24 20204pm Sat, Oct 24 20205pm Sat, Oct 24 20206pm Sat, Oct 24 20207pm Sat, Oct 24 20208pm Sat, Oct 24 20209pm Sat, Oct 24 202010pm Sat, Oct 24 202011pm Sat, Oct 24 202012am Sun, Oct 25 20201am Sun, Oct 25 20202am Sun, Oct 25 20203am Sun, Oct 25 20204am Sun, Oct 25 20205am Sun, Oct 25 20206am Sun, Oct 25 20207am Sun, Oct 25 20208am Sun, Oct 25 20209am Sun, Oct 25 202010am Sun, Oct 25 2020

Date	10/20	10/21
Hour (MDT)	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22
Temperature (°F)	24	25	25	25	26	26	27	27	26	27	30	34	36	37	37	37	35	33	31	29	27	23	22	20
Dewpoint (°F)	24	24	24	24	25	25	26	26	26	27	29	30	29	33	32	32	31	30	28	26	25	22	21	19
Wind Chill (°F)	17	18	18	19	20	20	20	20	19	20	25	30	30	31	31	31	28	26	24	20	18	13	11	9
Surface Wind (mph)	6	6	6	5	5	5	7	6	6	6	5	5	8	8	8	8	8	8	8	9	9	9	10	10
Wind Dir	SE	SE	SE	SE	SE	SE	SE	SSE	S	SSE	SSE	S	SW	WNW	NW	NNW	N	N	N	N	N	N	NNW	NNW
Gust
Sky Cover (%)	47	45	61	64	61	71	65	57	47	58	55	49	37	50	60	69	80	83	80	89	89	89	93	93
Precipitation Potential (%)	11	17	21	30	27	13	9	10	14	7	4	4	5	21	25	30	34	45	68	80	80	80	80	80
Relative Humidity (%)	99	97	96	96	97	96	95	97	99	100	95	86	77	84	83	82	86	88	89	90	91	95	95	97
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	Chc	Chc	Chc	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	SChc	SChc	Chc	Chc	--	--	--	--	--	--	--	--	--	--	--	Chc	Chc	Lkly	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date		10/22
Hour (MDT)	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22
Temperature (°F)	19	18	17	16	15	14	14	14	14	15	16	18	20	22	22	22	22	22	22	20	17	14	10	8
Dewpoint (°F)	18	17	16	15	14	13	13	13	12	13	14	15	16	17	17	17	17	17	16	15	13	12	9	7
Wind Chill (°F)	7	7	6	4	2	1	1	1	1	2	4	7	9	11	11	11	11	11	11	12	9	5	4	1
Surface Wind (mph)	10	9	9	9	10	10	10	10	10	10	9	9	9	10	10	10	10	10	10	6	6	6	3	3
Wind Dir	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	S	S
Gust
Sky Cover (%)	93	94	94	94	94	94	94	96	96	96	94	94	94	89	89	89	83	83	83	75	75	75	71	71
Precipitation Potential (%)	80	90	90	90	91	91	91	47	47	47	47	47	47	18	18	18	18	18	18	9	9	9	9	9
Relative Humidity (%)	97	95	94	95	96	96	95	94	93	92	90	87	84	81	80	80	80	80	79	80	85	91	95	97
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Chc	Chc	Chc	Chc	Chc	Chc	SChc	SChc	SChc	SChc	SChc	SChc	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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

---

Webmaster NOAA's National Weather Service Great Falls, MT

Disclaimer Credits Glossary

Privacy Policy About Us Career Opportunities