FOUS55 KTFX 181246 PFMTFX Point Forecast Matrices National Weather Service Great Falls MT 646 AM MDT Mon May 18 2026 MTZ312-182200- Great Falls-Cascade MT 47.47N 111.38W Elev. 3663 ft 646 AM MDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 52 29 63 40 61 Temp 37 45 49 51 43 37 32 30 44 58 61 60 53 47 44 41 51 57 59 56 Dewpt 28 29 29 28 28 27 24 23 26 29 32 32 36 37 36 33 36 35 38 38 RH 70 53 46 41 55 67 72 75 49 33 33 35 52 68 73 73 56 43 45 51 Wind dir W E E SE SE S S SW SW SW W W SW SW SW SW W NW N N Wind spd 4 5 5 6 6 6 8 9 11 10 11 10 5 9 10 9 9 8 9 10 Clouds SC B1 SC SC SC FW FW SC SC B1 B1 SC SC SC SC SC B1 B2 B2 B2 PoP 12hr 10 0 30 10 60 QPF 12hr 0 0 0 0 0.02 Snow 12hr 00-00 00-00 00-00 Rain C S S S L L Rain shwrs L Tstms S Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 38 64 41 69 44 75 48 77 Temp 45 39 56 62 49 43 62 67 52 46 69 73 55 50 71 74 Dewpt 39 35 33 33 36 34 34 35 38 36 35 34 37 35 33 33 PWind dir NW W SW SW SW SW SW SW Wind char LT LT LT LT LT GN GN GN Avg clouds B2 B1 SC SC SC SC B1 SC SC SC SC SC SC SC SC FW PoP 12hr 60 10 10 10 5 5 5 5 Rain L C $$ MTZ303-182200- Cut Bank-Glacier MT 48.60N 112.39W Elev. 3838 ft 646 AM MDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 54 31 63 38 57 Temp 37 48 52 52 46 39 33 32 47 59 61 61 53 46 41 39 46 51 55 55 Dewpt 24 27 28 28 29 30 29 28 30 29 31 33 35 35 33 34 35 34 35 36 RH 59 44 39 39 51 70 85 85 51 32 32 35 50 65 73 82 65 52 47 49 Wind dir NW E SE S S SW SW W W W W W W W W NW N N N N Wind spd 3 3 6 6 6 8 6 9 13 16 19 19 16 12 11 10 13 11 13 12 Wind gust 29 Clouds FW B1 B1 B1 SC SC FW SC B1 B1 B1 SC B1 SC SC B1 B2 B2 B2 B2 PoP 12hr 20 10 20 10 60 QPF 12hr 0 0 0 0 0.02 Snow 12hr 00-00 00-00 00-00 Rain S S C C L L C Rain shwrs S Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 1800 Min/Max 34 64 39 67 40 72 43 73 Temp 41 35 57 61 47 41 60 64 48 42 66 69 52 45 66 70 Dewpt 34 30 30 30 33 32 33 35 36 34 33 34 34 32 31 31 PWind dir NW NW SW W W W W W Wind char GN GN LT LT GN GN BZ BZ Avg clouds B2 SC SC SC B1 B1 B1 SC B1 SC SC SC SC SC SC FW PoP 12hr 40 5 5 20 5 5 5 5 Rain C S $$ MTZ319-182200- Helena-Lewis & Clark MT 46.61N 111.96W Elev. 3893 ft 646 AM MDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 55 29 62 38 65 Temp 37 47 54 54 46 38 33 29 40 54 60 61 53 46 41 38 48 60 63 60 Dewpt 27 24 24 22 22 24 24 23 23 26 27 27 29 32 31 31 32 34 36 34 RH 67 40 31 28 38 57 69 78 50 34 28 27 39 58 67 76 54 37 36 37 Wind dir NW N N NW W SW SW S SW W W W W SW SW SW W W NW NW Wind spd 6 6 8 8 3 4 4 3 3 6 10 10 5 6 5 4 1 4 10 12 Clouds SC SC SC SC SC FW FW SC SC SC SC SC SC FW FW SC SC B1 B1 B2 PoP 12hr 10 10 20 0 30 QPF 12hr 0 0 0 0 0.01 Snow 12hr 00-00 00-00 00-00 Rain S S C C Rain shwrs L Tstms S Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 38 65 39 70 41 75 44 78 Temp 46 38 55 64 49 41 62 68 52 42 68 73 55 46 70 76 Dewpt 36 34 33 29 33 33 33 32 36 35 34 31 34 34 32 28 PWind dir NW NW W W W W W W Wind char GN LT LT LT LT LT GN LT Avg clouds B2 B1 B1 SC SC SC B1 SC B1 SC SC SC B1 SC SC FW PoP 12hr 70 10 5 10 5 5 5 5 Rain L C Rain shwrs L Tstms S $$ MTZ326-182200- Bozeman-Gallatin MT 45.78N 111.16W Elev. 4475 ft 646 AM MDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 51 22 60 34 64 Temp 34 41 48 51 41 32 27 23 38 52 57 59 50 43 38 35 47 60 63 60 Dewpt 26 25 26 24 26 26 23 19 21 24 25 26 32 32 30 29 31 32 33 34 RH 72 52 42 34 55 78 85 84 50 33 29 28 50 65 73 78 53 35 32 37 Wind dir NW N N N SE S S S E W W NW SE SE S SE N W W NW Wind spd 8 6 8 6 4 6 4 4 2 4 9 6 2 4 3 3 0 5 8 10 Clouds B1 B1 SC SC FW FW FW FW FW SC B1 SC B1 SC SC SC SC SC B2 B2 PoP 12hr 10 0 10 0 10 QPF 12hr0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs L Tstms S Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 34 61 35 68 38 75 42 78 Temp 45 35 53 60 45 38 60 66 48 40 68 73 52 43 71 76 Dewpt 37 32 34 31 33 32 33 32 35 33 34 31 34 33 33 31 PWind dir NW NW SE SW SE SW S SW Wind char LT LT LT LT LT LT LT LT Avg clouds B2 B2 B1 SC SC SC B1 SC B1 SC SC SC SC SC SC FW PoP 12hr 70 30 10 10 5 5 5 5 Rain L L C Rain shwrs L Tstms S $$ MTZ330-182200- West Yellowstone-Gallatin MT 44.69N 111.11W Elev. 6644 ft 646 AM MDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 41 16 51 24 58 Temp 28 36 41 40 31 23 18 16 31 47 51 50 40 33 27 24 38 55 58 55 Dewpt 16 14 11 10 15 19 17 15 16 16 16 17 22 25 23 22 24 22 25 29 RH 60 40 29 28 51 84 96 96 53 28 24 27 48 72 85 92 57 27 28 37 Wind dir NE N N N N N E SE S SW SW W SW S S N SW SW W W Wind spd 17 14 11 10 4 2 1 1 1 6 8 8 1 1 1 0 1 6 8 6 Wind gust 36 27 20 17 18 18 Clouds B2 B1 SC SC FW CL CL CL FW SC B1 B1 B1 SC SC SC SC SC B2 B2 PoP 12hr 10 5 20 0 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C Tstms S Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 28 57 28 63 30 70 33 73 Temp 38 29 52 55 37 30 57 61 40 32 64 67 44 35 68 71 Dewpt 34 29 27 24 29 27 27 31 32 29 27 30 31 29 27 29 PWind dir W N N W W SW S SW Wind char LT LT LT LT LT LT LT GN Avg clouds B2 B1 B1 SC SC SC SC SC B1 SC SC SC B1 SC SC FW PoP 12hr 50 30 10 20 5 5 5 5 Rain C C C Rain shwrs C S Snow C Tstms S S $$ MTZ328-182200- Dillon-Beaverhead MT 45.26N 112.55W Elev. 5357 ft 646 AM MDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 48 23 60 30 63 Temp 32 42 46 47 38 31 26 24 37 52 58 58 48 41 34 31 43 58 62 61 Dewpt 22 21 19 19 18 19 17 18 20 22 23 22 26 28 25 23 27 28 29 29 RH 66 43 34 32 44 61 68 77 50 31 26 25 42 59 69 72 53 32 28 29 Wind dir N N N N NE S S S SW SW SW W S S S S SW W NW NW Wind spd 18 18 14 12 4 4 5 5 5 6 9 8 5 4 5 5 4 8 10 10 Clouds SC SC FW FW SC FW FW FW SC SC SC SC B1 B1 SC FW FW B1 B1 B2 PoP 12hr 5 10 20 5 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain S Rain shwrs C Tstms S Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 34 63 36 68 38 75 41 78 Temp 44 35 55 61 45 38 61 67 48 40 68 73 51 43 71 76 Dewpt 33 29 31 28 30 29 31 30 32 29 30 28 30 29 29 27 PWind dir N N E W W SW SW SW Wind char GN GN LT LT LT GN GN GN Avg clouds B2 B1 SC SC SC B1 B1 SC B1 SC SC FW SC SC SC FW PoP 12hr 40 10 5 5 5 0 0 5 Rain C C Rain shwrs C Tstms S $$ MTZ305-182200- Havre-Hill MT 48.54N 109.76W Elev. 2585 ft 646 AM MDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 54 26 66 41 64 Temp 35 46 52 53 45 36 31 27 41 58 64 63 55 49 45 42 49 59 62 60 Dewpt 28 29 27 26 26 26 24 23 26 31 31 33 37 38 37 37 39 39 37 37 RH 75 51 38 35 47 67 75 85 55 36 29 32 51 66 73 82 68 47 39 42 Wind dir N N N NE E SE E E SW SW SW SW S SW SW SW W NW NW NW Wind spd 6 6 6 5 6 8 5 4 4 11 11 10 8 10 10 10 11 12 14 14 Clouds B1 SC SC FW FW FW FW SC FW SC B1 B1 B2 B1 B1 B1 B1 B2 B2 B1 PoP 12hr 10 0 50 10 40 QPF 12hr 0 0 0.01 0 0 Snow 12hr 00-00 00-00 00-00 Rain C C C Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 36 66 39 70 42 77 46 79 Temp 46 37 59 64 49 41 65 69 52 44 71 75 56 48 73 76 Dewpt 39 34 36 33 37 35 37 34 38 37 39 36 39 38 36 34 PWind dir W NW SE SW S SW SW W Wind char GN GN LT LT LT LT GN GN Avg clouds B2 SC SC B1 SC SC SC SC SC SC SC FW SC SC SC SC PoP 12hr30 10 10 10 5 5 5 5 Rain C S $$ MTZ314-182200- Lewistown-Fergus MT 47.05N 109.46W Elev. 4144 ft 646 AM MDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 46 23 59 36 59 Temp 31 38 44 46 37 29 27 27 45 53 57 57 47 43 40 37 51 58 56 53 Dewpt 29 28 28 27 27 25 23 22 27 29 32 35 36 35 32 30 34 37 36 37 RH 92 67 53 47 67 85 85 81 49 39 38 43 65 73 73 75 52 45 47 54 Wind dir NW NW NW N SE S S S SW W W SW S S SW SW W NW NW NW Wind spd 12 10 9 6 3 5 6 8 5 6 8 5 4 8 6 6 10 11 10 9 Clouds OV B2 B2 SC FW FW FW SC SC SC B1 SC B1 SC SC SC SC B1 B1 B2 PoP 12hr 40 0 30 5 50 QPF 12hr 0.01 0 0 0 0.01 Snow 12hr T 00-00 00-00 Rain C C Rain shwrs C L Snow S Tstms S S Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 35 59 36 64 39 71 43 74 Temp 42 36 52 56 43 40 59 62 46 43 66 69 51 47 68 71 Dewpt 37 33 34 34 33 33 33 35 34 34 34 36 35 34 34 36 PWind dir NW NW SW W S W SW W Wind char LT GN LT LT LT LT LT GN Avg clouds B2 B2 B1 SC SC SC SC SC SC SC SC FW SC SC SC FW PoP 12hr 70 30 10 20 5 5 5 10 Rain L C C Rain shwrs L S S Tstms S S S $$ http://www.weather.gov/greatfalls