Weather for Waterloo, Montana
Current Weather
Humidity: 86%
Feels Like: 48.7°F
Wind: N 2.7 mph
Wind Gusts: 3.1 mph
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 0.9
Five Day Weather Forecast
Fri
H: 72°F
L: 49°F
Sat
H: 47°F
L: 41°F
Sun
H: 41°F
L: 28°F
Mon
H: 55°F
L: 26°F
Tue
H: 62°F
L: 32°F
Air Quality
Nitrogen Dioxide: 1.75 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 91 μg/m3
Astronomical
Sun Transit: 1:17 PM
Sunset: 7:04 PM
Daylight: 11 hrs 34 mins
Moon Transit: 10:52 PM
Moonset: 2:59 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 87.6%
Best Times for Fishing or Hunting
Major Periods
6:54 AM - 9:24 AM12:00 AM - 12:00 AM
Minor Periods
5:11 PM - 6:41 PM2:29 AM - 3:59 AM
Action Rating: 3 out of 5
Winter Storm Watch issued October 3 at 12:54AM MDT until October 5 at 6:00PM MDT by NWS Great Falls MT
Effective: Fri October 3, 2025, 12:54 AM
Expires: Fri October 3, 2025, 6:00 PM
* WHAT...Heavy, wet snow possible. Total snow accumulations of 2 to 7 inches above 6000 feet. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From Saturday evening through Sunday afternoon. * IMPACTS...Cold, wet, and raw outdoor conditions. Increased risk for hypothermia for those not properly dressed for the weather. Forest roads may become difficult to travel or impassible due to muddy and slushy conditions. * ADDITIONAL DETAILS...Isolated power outages for areas that receive heavier snow falling onto power lines and or trees with full foliage.
Monitor the latest forecasts for updates on this situation. Remember, a Winter Storm Watch means that there is at least a 50% chance of impactful winter weather conditions during the watch period.
Winter Storm Watch issued October 3 at 12:54AM MDT until October 5 at 6:00PM MDT by NWS Great Falls MT
Effective: Fri October 3, 2025, 12:54 AM
Expires: Fri October 3, 2025, 6:00 PM
* WHAT...Heavy, wet snow possible. Total snow accumulations of 2 to 7 inches above 6000 feet. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From Saturday evening through Sunday afternoon. * IMPACTS...Cold, wet, and raw outdoor conditions. Increased risk for hypothermia for those not properly dressed for the weather. Forest roads may become difficult to travel or impassible due to muddy and slushy conditions. * ADDITIONAL DETAILS...Isolated power outages for areas that receive heavier snow falling onto power lines and or trees with full foliage.
Monitor the latest forecasts for updates on this situation. Remember, a Winter Storm Watch means that there is at least a 50% chance of impactful winter weather conditions during the watch period.
Winter Storm Watch issued October 3 at 12:54AM MDT until October 5 at 6:00PM MDT by NWS Great Falls MT
Effective: Fri October 3, 2025, 12:54 AM
Expires: Fri October 3, 2025, 6:00 PM
* WHAT...Heavy, wet snow possible. Total snow accumulations of 2 to 7 inches above 6000 feet. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From Saturday evening through Sunday afternoon. * IMPACTS...Cold, wet, and raw outdoor conditions. Increased risk for hypothermia for those not properly dressed for the weather. Forest roads may become difficult to travel or impassible due to muddy and slushy conditions. * ADDITIONAL DETAILS...Isolated power outages for areas that receive heavier snow falling onto power lines and or trees with full foliage.
Monitor the latest forecasts for updates on this situation. Remember, a Winter Storm Watch means that there is at least a 50% chance of impactful winter weather conditions during the watch period.
Weather Forecast
Average Temperature: 56.5°F
Average Humidity: 67%
Wind: 11 mph
UV Index: 1
Air Quality
Nitrogen Dioxide: 6.36 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 69.2 μg/m3
Astronomical
Sun Transit: 1:17 PM
Sunset: 7:04 PM
Daylight: 11 hrs 34 mins
Moon Transit: 10:52 PM
Moonset: 2:59 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 87.6%
Best Times for Fishing or Hunting
Major Periods
6:54 AM - 9:24 AM12:00 AM - 12:00 AM
Minor Periods
5:11 PM - 6:41 PM2:29 AM - 3:59 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 45.7°F
Average Humidity: 85%
Wind: 9.8 mph
UV Index: 0.7
Air Quality
Nitrogen Dioxide: 5.24 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 64.96 μg/m3
Astronomical
Sun Transit: 1:17 PM
Sunset: 7:02 PM
Daylight: 11 hrs 31 mins
Moon Transit: 11:41 PM
Moonset: 4:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 94.0%
Best Times for Fishing or Hunting
Major Periods
7:43 AM - 10:13 AM12:00 AM - 12:00 AM
Minor Periods
5:31 PM - 7:01 PM3:47 AM - 5:17 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 37.3°F
Average Humidity: 85%
Wind: 7.6 mph
UV Index: 0.5
Air Quality
Nitrogen Dioxide: 3.91 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 65.36 μg/m3
Astronomical
Sun Transit: 1:17 PM
Sunset: 7:01 PM
Daylight: 11 hrs 28 mins
Moon Transit: 11:38 PM
Moonset: 5:35 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.2%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM12:00 AM - 12:00 AM
Minor Periods
5:50 PM - 7:20 PM5:05 AM - 6:35 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 38.9°F
Average Humidity: 63%
Wind: 6 mph
UV Index: 0.9
Air Quality
Nitrogen Dioxide: 2.71 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 57.76 μg/m3
Astronomical
Sun Transit: 1:16 PM
Sunset: 6:59 PM
Daylight: 11 hrs 25 mins
Moon Transit: 12:00 AM
Moonset: 6:56 AM
Moon Phase: Full
Moon Illumination: 100.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM12:00 AM - 12:00 AM
Minor Periods
6:09 PM - 7:39 PM6:26 AM - 7:56 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 44.8°F
Average Humidity: 43%
Wind: 7.4 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 11.83 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 57.85 μg/m3
Astronomical
Sun Transit: 1:16 PM
Sunset: 6:57 PM
Daylight: 11 hrs 22 mins
Moon Transit: 1:20 AM
Moonset: 8:19 AM
Moon Phase: Full
Moon Illumination: 99.1%
Best Times for Fishing or Hunting
Major Periods
12:50 AM - 3:20 AM10:12 AM - 12:42 AM
Minor Periods
6:31 PM - 8:01 PM7:49 AM - 9:19 AM
Action Rating: 5 out of 5