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Great Falls, MT Weather Forecast
Great Falls, MT Weather Forecast Dated: 850 PM Thu Aug 20 2026 (Great Falls Time)
Thu, 20th Lo: 14°C57°F Hi: 34°C94°F |
Sunny Thursday, temperatures as high as 94°F34°C, low temperature around 57°F14°C, chance of rain 1%, wind out of the WSW 10 mph15 km/h. Barometric pressure 29.88 in1012 mb, visibility 6 mi10 km, humidity 31%. |
| Fri, 21st Lo: 14°C57°F Hi: 31°C88°F |
Sunny Friday, temperatures as high as 88°F31°C, low temperature around 57°F14°C, chance of rain 4%, wind out of the NNW 10 mph15 km/h. Barometric pressure 30 in1016 mb, visibility 6 mi10 km, humidity 32%. |
Sat, 22nd Lo: 20°C68°F Hi: 34°C93°F |
Overcast Saturday, temperatures as high as 93°F34°C, low temperature around 68°F20°C, chance of rain 9%, wind out of the SSE 22 mph35 km/h. Barometric pressure 29.85 in1011 mb, visibility 6 mi10 km, humidity 31%. |
| Sun, 23rd Lo: 18°C64°F Hi: 34°C93°F |
Sunny Sunday, temperatures as high as 93°F34°C, low temperature around 64°F18°C, chance of rain 17%, wind out of the WSW 24 mph39 km/h. Barometric pressure 29.77 in1008 mb, visibility 6 mi10 km, humidity 38%. |
| Mon, 24th Lo: 14°C58°F Hi: 27°C81°F |
Sunny Monday, temperatures as high as 81°F27°C, low temperature around 58°F14°C, chance of rain 2%, wind out of the NNW 12 mph19 km/h. Barometric pressure 29.97 in1015 mb, visibility 6 mi10 km, humidity 29%. |
| Tue, 25th Lo: 16°C60°F Hi: 30°C87°F |
Sunny Tuesday, temperatures as high as 87°F30°C, low temperature around 60°F16°C, chance of rain 2%, wind out of the E 10 mph16 km/h. Barometric pressure 30 in1016 mb, visibility 6 mi10 km, humidity 33%. |
| Wed, 26th Lo: 17°C62°F Hi: 33°C92°F |
Overcast Wednesday, temperatures as high as 92°F33°C, low temperature around 62°F17°C, chance of rain 5%, wind out of the SSE 13 mph21 km/h. Barometric pressure 29.83 in1010 mb, visibility 6 mi10 km, humidity 33%. |
| Thu, 27th Lo: 17°C63°F Hi: 30°C86°F |
Sunny Thursday, temperatures as high as 86°F30°C, low temperature around 63°F17°C, chance of rain 1%, wind out of the WSW 21 mph34 km/h. Barometric pressure 29.83 in1010 mb, visibility 6 mi10 km, humidity 31%. |
| Fri, 28th Lo: 14°C57°F Hi: 25°C77°F |
Sunny Friday, temperatures as high as 77°F25°C, low temperature around 57°F14°C, chance of rain 2%, wind out of the N 13 mph21 km/h. Barometric pressure 29.97 in1015 mb, visibility 6 mi10 km, humidity 37%. |
| Sat, 29th Lo: 12°C53°F Hi: 26°C78°F |
Overcast Saturday, temperatures as high as 78°F26°C, low temperature around 53°F12°C, chance of rain 36%, wind out of the NE 19 mph30 km/h. Barometric pressure 29.97 in1015 mb, visibility 6 mi10 km, humidity 51%. |
| Sun, 30th Lo: 12°C54°F Hi: 26°C79°F |
Sunny Sunday, temperatures as high as 79°F26°C, low temperature around 54°F12°C, chance of rain 57%, wind out of the W 17 mph27 km/h. Barometric pressure 29.91 in1013 mb, visibility 6 mi10 km, humidity 59%. |
| Mon, 31st Lo: 12°C53°F Hi: 26°C79°F |
Overcast Monday, temperatures as high as 79°F26°C, low temperature around 53°F12°C, chance of rain 8%, wind out of the E 14 mph23 km/h. Barometric pressure 29.88 in1012 mb, visibility 6 mi10 km, humidity 51%. |
| Tue, 1st Lo: 14°C58°F Hi: 30°C86°F |
Overcast Tuesday, temperatures as high as 86°F30°C, low temperature around 58°F14°C, chance of rain 8%, wind out of the WSW 17 mph27 km/h. Barometric pressure 29.62 in1003 mb, visibility 6 mi10 km, humidity 33%. |
| Wed, 2nd Lo: 12°C54°F Hi: 20°C67°F |
Overcast Wednesday, temperatures as high as 67°F20°C, low temperature around 54°F12°C, chance of rain 7%, wind out of the WSW 20 mph32 km/h. Barometric pressure 29.62 in1003 mb, visibility 6 mi10 km, humidity 35%. |
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