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Mountaineer Lake, MT Weather Forecast

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Overcast

38°F

Updated	3:43 am
Feels Like	22°F
Humidity	92%
Wind	N 0 mph
Barometer	30.07 in
Dew Point	36°F

Overcast

3°C

Updated	3:43 am
Feels Like	-5°C
Humidity	92%
Wind	N 0 km/h
Barometer	101.8 kPa
Dew Point	2°C

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Cloud Cover	0%
Wind Chill	38°F 3°C
Sunrise	7:53 AM
Sunset	6:52 PM
Moonrise	11:36 AM
Moonset	7:51 PM

Civil Twilight
7:17 AM to 7:48 AM
6:51 PM to 7:22 PM
Mountaineer Lake MT Weather - Waxing Crescent Moon

Waxing Crescent Moon

Mountaineer Lake Weather Forecast

TODAY	TONIGHT	WEDNESDAY	WEDNESDAY NIGHT	THURSDAY	THURSDAY NIGHT	FRIDAY	FRIDAY NIGHT	SATURDAY	SATURDAY NIGHT	SUNDAY	SUNDAY NIGHT

Mostly Sunny	Fog	Partly Cloudy	Patchy Fog	Mostly Sunny	Patchy Fog	Mostly Sunny	Mostly Clear	Partly Cloudy	Partly Cloudy	Mostly Sunny	Mostly Clear
Hi: 46°FHi: 8°C	Lo: 25°FLo: -4°C	Hi: 55°FHi: 13°C	Lo: 26°FLo: -3°C	Hi: 56°FHi: 13°C	Lo: 30°FLo: -1°C	Hi: 65°FHi: 18°C	Lo: 35°FLo: 2°C	Hi: 65°FHi: 18°C	Lo: 35°FLo: 2°C	Hi: 60°FHi: 16°C	Lo: 36°FLo: 2°C

POP = Probability of Precipitation.

Weather Outlook Updated: 1222 AM MDT Tue Oct 13 2026 Mountaineer Lake, MT Weather - WeatherWorld.com

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Issued: 213 AM MDT Tue Oct 13 2026

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KEY MESSAGES:

Cold mornings with valley fog for much of the rest of the week.
A warming trend through the end of the week with Friday 10 to 15 degrees above average.
Cold trough and cold front coming for early next week, though most of the precipitation will probably got further south.

A cold, stable air mass left behind the last cold front to come through will make for some cool mornings at high elevations and in valleys where it stays clear for a good portion of the night. A hard f...

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Weather 101: Term of the Day

Tsunami

A series of long-period waves (on the order of tens of minutes) that are usually generated by an impulsive disturbance that displaces massive amounts of water, such as an earthquake occurring on or near the sea floor. Underwater volcanic eruptions and landslides can also cause tsunami. The resultant waves much the same as waves propagating in a calm pond after a rock is tossed. While traveling in the deep oceans, tsunami have extremely long wavelengths, often exceeding 50 nm, with small amplitudes (a few tens of centimeters) and negligible wave steepness, which in the open ocean would cause nothing more than a gentle rise and fall for most vessels, and possibly go unnoticed. Tsunami travel at very high speeds, sometimes in excess of 400 knots. Across the open oceans, these high-speed waves lose very little energy. As tsunami reach the shallow waters near the coast, they begin to slow down while gradually growing steeper, due to the decreasing water depth. The building walls of destruction can become extremely large in height, reaching tens of meters 30 feet or more as they reach the shoreline. The effects can be further amplified where a bay, harbor, or lagoon funnels the waves as they move inland. Large tsunami have been known to rise to over 100 feet! The amount of water and energy contained in tsunami can have devastating effects on coastal areas.