Three Forks, MT Monthly Weather

Gallatin County6:12 AM MDT45.89°N, 111.55°WElevation 4,075 ft
← September

October 2026

Sun
Mon
Tue
Wed
Thu
Fri
Sat
170°/41°Avg 66°/35°
277°/40°Avg 65°/35°
374°/39°Avg 65°/34°
480°/36°Avg 64°/34°
584°/38°Avg 64°/34°
678°/38°Avg 63°/33°
776°/35°Avg 62°/33°
875°/32°Avg 62°/32°
985°/38°Avg 61°/32°
1060°/36°0.28 inAvg 61°/32°
1136°/31°0.79 in6.9 in snowAvg 60°/31°
1234°/24°0.02 in0.2 in snowAvg 60°/31°
1337°/21°Avg 59°/30°
1448°/24°Avg 59°/30°
1551°/27°Avg 58°/30°
1659°/24°Avg 57°/29°
1772°/27°Avg 57°/29°
1863°/33°Avg 56°/28°
1972°/28°<0.01 inAvg 56°/28°
20Avg 55°/28°
21Avg 55°/27°
22 Mostly Sunny 69°/39°Avg 54°/27°
23 Rain 51°/24°Avg 54°/27°
24 Mostly Sunny 46°/22°Avg 53°/26°
25 Mostly Sunny 47°/21°Avg 52°/26°
26 Mostly Sunny 48°/22°Avg 52°/26°
27 Slight Chance Rain And Snow 50°/23°Avg 51°/25°
28 Sleet showers 37°/23°Avg 51°/25°
29 Partly cloudy 44°/22°Avg 50°/24°
30 Partly cloudy 49°/26°Avg 50°/24°
31Avg 49°/24°
Average high65° (normal 61°)
Average low32° (normal 32°)
Warmest / coldest85° / 21°
Precipitation1.09 in (normal 0.70 in to date)

Observed: Bozeman Gallatin Field Ap, 32 km away, records since 1941. Normals 1991–2020. Climate data from NOAA's Regional Climate Centers (ACIS); recent days are preliminary. Days ahead: the forecast.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.