Model estimate for 9:00 AM MDT (no recent station report)

Mammoth, MT weather

Sunny and 22°−6°.

Mostly agree

Now 22°−6°

Sunny · Feels like 16°−9°

Feels like: 15°−9°; Wind chill from 5 mph8 km/h wind · air 22°−6°
Wind: 5 mph8 km/h; From the south-southwest. Up to 5 mph8 km/h through 9 PM
Dew point: 11°−12°; Dry · up to 19°−7° by 11 AM
UV index: 0Low; Moderate 12–5 PM · peak 4

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Hard freeze until noon (low 22°−6°)
Above 30°−1° today by 11 AM
High 38°3° today at 4 PM
Hard freeze tonight 7 PM–11 AM (low 26°−3°)
Hard freeze tomorrow night from 7 PM (low 26°−3°)

This morningUp to 31°−1° by 11 AM · freezing, low 22°−6° · Clear
This afternoonUp to 38°3° by 4 PM · Clear
TonightDown to 27°−3° by 4 AM · freezing, low 27°−3° · Clear
Tomorrow morningUp to 34°1° by 11 AM · freezing, low 26°−3° · Clear
Tomorrow afternoonNear 36°2° · Partly cloudy
Tomorrow nightDown to 26°−3° by 5 AM · freezing, low 26°−3° · Mostly cloudy
Monday morningNear 28°−2° · freezing, low 27°−3° · Mostly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 9a	Sunny	22°−6° (likely 21°−6° to 26°−3°)	16°−9°	0%	5 mph8 km/h from SSW, gusts 5 mph8 km/h	63%	1%	0
Sat 10a	Sunny	28°−2° (likely 25°−4° to 30°−1°)	24°−4°	0%	3 mph5 km/h from SW, gusts 5 mph9 km/h	62%	2%	1
Sat 11a	Sunny	31°−1° (likely 30°−1° to 34°1°)	27°−3°	0%	3 mph5 km/h from WSW, gusts 6 mph10 km/h	60%	4%	2
Sat 12p	Mostly sunny	33°1° (likely 32°0° to 36°2°)	30°−1°	0%	3 mph5 km/h from W, gusts 6 mph10 km/h	58%	11%	3
Sat 1p	Sunny	36°2° (likely 33°1° to 39°4°)	33°1°	0%	3 mph5 km/h from W, gusts 7 mph12 km/h	63%	9%	4
Sat 2p	Sunny	37°3° (likely 35°2° to 41°5°)	34°1°	0%	3 mph5 km/h from W, gusts 8 mph12 km/h	62%	2%	4
Sat 3p	Sunny	37°3° (likely 37°3° to 42°6°)	34°1°	0%	3 mph5 km/h from W, gusts 7 mph11 km/h	65%	1%	4
Sat 4p	Sunny	38°3° (likely 37°3° to 42°6°)	36°2°	0%	3 mph5 km/h from W, gusts 7 mph11 km/h	65%	1%	3
Sat 5p	Sunny	36°2° (likely 35°2° to 42°6°)	36°2°	0%	2 mph3 km/h from WSW, gusts 6 mph10 km/h	66%	3%	2
Sat 6p	Clear	33°1° (likely 32°0° to 40°4°)	33°1°	0%	2 mph3 km/h from SW, gusts 6 mph9 km/h	72%	29%	1
Sat 7p	Clear	31°−1° (likely 30°−1° to 36°2°)	31°−1°	0%	2 mph3 km/h from SW, gusts 6 mph10 km/h	76%	9%	0
Sat 8p	Clear	29°−2° (likely 29°−2° to 36°2°)	29°−2°	0%	2 mph3 km/h from SSW, gusts 6 mph10 km/h	69%	5%	0
Sat 9p	Clear	29°−2° (likely 28°−2° to 36°2°)	25°−4°	0%	3 mph5 km/h from S, gusts 7 mph11 km/h	63%	2%	0
Sat 10p	Clear	28°−2° (likely 28°−2° to 36°2°)	24°−4°	0%	3 mph5 km/h from SSW, gusts 6 mph9 km/h	62%	2%	0
Sat 11p	Clear	28°−2° (likely 28°−2° to 36°2°)	24°−4°	0%	3 mph5 km/h from SSW, gusts 5 mph8 km/h	59%	0%	0
Sun 12a	Clear	28°−2° (likely 28°−2° to 35°2°)	24°−4°	0%	3 mph5 km/h from SSW, gusts 5 mph8 km/h	59%	0%	0
Sun 1a	Clear	28°−2° (likely 28°−2° to 35°2°)	28°−2°	0%	2 mph3 km/h from SSW, gusts 5 mph7 km/h	56%	0%	0
Sun 2a	Clear	28°−2° (likely 28°−2° to 36°2°)	28°−2°	0%	2 mph3 km/h from SSW, gusts 4 mph6 km/h	56%	0%	0
Sun 3a	Clear	28°−2° (likely 28°−2° to 36°2°)	28°−2°	0%	2 mph3 km/h from SSW, gusts 4 mph7 km/h	55%	0%	0
Sun 4a	Clear	27°−3° (likely 27°−3° to 36°2°)	27°−3°	0%	2 mph3 km/h from SSW, gusts 4 mph7 km/h	54%	0%	0
Sun 5a	Clear	27°−3° (likely 27°−3° to 36°2°)	27°−3°	0%	2 mph3 km/h from SSW, gusts 5 mph7 km/h	56%	0%	0
Sun 6a	Clear	27°−3° (likely 27°−3° to 35°2°)	27°−3°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	57%	0%	0
Sun 7a	Clear	27°−3° (likely 27°−3° to 35°2°)	27°−3°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	61%	1%	0
Sun 8a	Sunny	26°−3° (likely 26°−3° to 34°1°)	26°−3°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	63%	10%	0
Sun 9a	Sunny	27°−3° (likely 27°−3° to 36°2°)	23°−5°	0%	3 mph5 km/h from E, gusts 6 mph9 km/h	64%	2%	0
Sun 10a	Sunny	31°−1° (likely 31°−1° to 38°3°)	28°−2°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	67%	7%	1
Sun 11a	Sunny	34°1° (likely 34°1° to 40°4°)	31°−1°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	65%	14%	2
Sun 12p	Sunny	35°2° (likely 35°2° to 41°5°)	32°0°	0%	3 mph5 km/h from NE, gusts 10 mph17 km/h	65%	15%	3
Sun 1p	Sunny	37°3° (likely 36°2° to 43°6°)	34°1°	0%	3 mph5 km/h from NE, gusts 10 mph16 km/h	71%	22%	3
Sun 2p	Mostly sunny	37°3° (likely 37°3° to 44°7°)	34°1°	0%	3 mph5 km/h from NE, gusts 10 mph16 km/h	73%	30%	3
Sun 3p	Mostly sunny	37°3° (likely 37°3° to 44°7°)	34°1°	0%	3 mph5 km/h from ENE, gusts 10 mph15 km/h	73%	30%	3
Sun 4p	Partly sunny	38°3° (likely 37°3° to 43°6°)	36°2°	0%	3 mph5 km/h from ENE, gusts 9 mph15 km/h	74%	50%	2
Sun 5p	Partly sunny	36°2° (likely 35°2° to 42°6°)	33°1°	0%	3 mph5 km/h from ENE, gusts 9 mph14 km/h	77%	49%	1
Sun 6p	Partly cloudy	33°1° (likely 32°0° to 39°4°)	30°−1°	0%	3 mph5 km/h from ESE, gusts 8 mph12 km/h	82%	60%	1
Sun 7p	Partly cloudy	31°−1° (likely 30°−1° to 37°3°)	28°−2°	0%	3 mph5 km/h from ESE, gusts 6 mph10 km/h	88%	59%	0
Sun 8p	Partly cloudy	29°−2° (likely 29°−2° to 36°2°)	25°−4°	0%	3 mph5 km/h from ESE, gusts 6 mph10 km/h	84%	48%	0
Sun 9p	Partly cloudy	28°−2° (likely 28°−2° to 35°2°)	24°−4°	0%	3 mph5 km/h from ESE, gusts 7 mph10 km/h	76%	57%	0
Sun 10p	Partly cloudy	27°−3° (likely 27°−3° to 35°2°)	23°−5°	0%	3 mph5 km/h from ESE, gusts 7 mph11 km/h	73%	73%	0
Sun 11p	Partly cloudy	27°−3° (likely 27°−3° to 34°1°)	23°−5°	0%	3 mph5 km/h from ESE, gusts 7 mph11 km/h	72%	78%	0
Mon 12a	Partly cloudy	27°−3° (likely 27°−3° to 34°1°)	23°−5°	0%	3 mph5 km/h from SSE, gusts 7 mph12 km/h	71%	78%	0
Mon 1a	Cloudy	27°−3° (likely 27°−3° to 34°1°)	23°−5°	0%	3 mph5 km/h from SSE, gusts 7 mph12 km/h	69%	69%	0
Mon 2a	Partly cloudy	27°−3° (likely 27°−3° to 34°1°)	23°−5°	0%	3 mph5 km/h from SSE, gusts 7 mph11 km/h	67%	73%	0
Mon 3a	Cloudy	27°−3° (likely 27°−3° to 35°2°)	23°−5°	0%	3 mph5 km/h from S, gusts 8 mph13 km/h	65%	79%	0
Mon 4a	Cloudy	27°−3° (likely 27°−3° to 34°1°)	23°−5°	0%	3 mph5 km/h from S, gusts 8 mph13 km/h	64%	75%	0
Mon 5a	Cloudy	26°−3° (likely 26°−3° to 35°2°)	22°−6°	0%	3 mph5 km/h from S, gusts 8 mph12 km/h	64%	79%	0
Mon 6a	Cloudy	27°−3° (likely 27°−3° to 35°2°)	23°−5°	0%	3 mph5 km/h from S, gusts 7 mph11 km/h	65%	75%	0
Mon 7a	Mostly cloudy	27°−3° (likely 25°−4° to 36°2°)	23°−5°	0%	3 mph5 km/h from S, gusts 7 mph11 km/h	66%	67%	0
Mon 8a	Cloudy	28°−2° (likely 25°−4° to 36°2°)	24°−4°	0%	3 mph5 km/h from S, gusts 7 mph12 km/h	68%	70%	0

Days ahead

Tap a day for its hours and the official wording.

Today, Oct 24. Mostly sunny. High 38°3°, low 26°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 31°−1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 38°3°
  Dry
3. Evening
  6 PM–midnight
  Clear, 29°−2°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 27°−3°
  Dry
Official NWS forecast
Today: Sunny, with a high near 38. West southwest wind around 5 mph.
Tonight: Mostly clear, with a low around 26. South southwest wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
37°3°–42°6°
Low, likely
18°−8°–26°−3°
Wind
6 mph10 km/h, gusts 20 mph32 km/h
UV peak
4
Tomorrow, Oct 25. Partly sunny. High 38°3°, low 26°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 26°−3°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 38°3°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 29°−2°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 26°−3°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 38. East wind around 3 mph.
Night: Partly cloudy, with a low around 26. Southeast wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
38°3°–44°7°
Low, likely
26°−3°–34°1°
Wind
5 mph9 km/h, gusts 17 mph28 km/h
UV peak
3
Monday, Oct 26. Partly sunny. High 44°7°, low 31°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 28°−2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 47°8°
  Dry
3. Evening
  6 PM–midnight
  Clear, 38°3°
  40% chance · 0.04 in1.1 mm
4. Overnight
  midnight–6 AM
  Drizzle, 35°1°
  60% chance · 0.1 in0.3 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 44. South wind around 5 mph.
Night: A chance of rain before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 31. South southwest wind 3 to 8 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
43°6°–50°10°
Low, likely
26°−3°–31°−1°
Wind
5 mph9 km/h, gusts 29 mph47 km/h
UV peak
3
Tuesday, Oct 27. Snow. High 39°4°, low 26°−3°. Snow 0–1 in0–3 cm, 60% chance. Mostly agree.
1. Morning
  6 AM–noon
  Snow, 35°1°
  60% chance · 0.07 in1.8 mm
2. Afternoon
  noon–6 PM
  Drizzle, 39°4°
  40% chance · 0.02 in0.5 mm
3. Evening
  6 PM–midnight
  Mostly clear, 35°2°
  30% chance
4. Overnight
  midnight–6 AM
  Clear, 31°−1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Snow likely. Mostly cloudy, with a high near 39. Southwest wind around 9 mph, with gusts as high as 18 mph. New snow accumulation of less than one inch possible.
Night: A chance of snow. Mostly cloudy, with a low around 26. Southwest wind 7 to 10 mph, with gusts as high as 18 mph. New snow accumulation of around one inch possible.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
36°2°–40°4°
Low, likely
26°−3°–35°2°
Wind
12 mph19 km/h, gusts 36 mph58 km/h
UV peak
2
Wednesday, Oct 28. Snow. High 39°4°, low 27°−3°. Snow, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 30°−1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 43°6°
  Dry
3. Evening
  6 PM–midnight
  Clear, 34°1°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 31°0°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of snow before noon. Mostly sunny, with a high near 39.
Night: Partly cloudy, with a low around 27.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
39°4°–44°7°
Low, likely
25°−4°–32°0°
Wind
10 mph16 km/h, gusts 30 mph49 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 39°4°, low 28°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 44°7°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 38°4°
  30% chance · 0.05 in1.3 mm
4. Overnight
  midnight–6 AM
  Snow, 35°1°
  40% chance · 0.5 in1.1 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 39.
Night: A slight chance of snow after midnight. Mostly cloudy, with a low around 28.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
39°4°–46°8°
Low, likely
26°−3°–34°1°
Wind
5 mph8 km/h, gusts 25 mph40 km/h
UV peak
3
Friday, Oct 30. Snow. High 41°5°, low 30°−1°. Snow 0–3 in0–8 cm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Snow, 35°2°
  40% chance · 0.5 in1.3 cm
2. Afternoon
  noon–6 PM
  Drizzle, 42°5°
  40% chance · 0.1 in0.3 cm
3. Evening
  6 PM–midnight
  Drizzle, 35°2°
  30% chance · 0.2 in0.4 cm
4. Overnight
  midnight–6 AM
  Snow, 31°−1°
  30% chance · 0.3 in0.8 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow. Partly sunny, with a high near 41. New snow accumulation of less than half an inch possible.
Night: A chance of snow. Mostly cloudy, with a low around 30. New snow accumulation of less than one inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
34°1°–45°7°
Low, likely
24°−4°–34°1°
Wind
6 mph9 km/h, gusts 24 mph39 km/h
UV peak
2
Saturday, Oct 31. Snow. High 33°1°, low 25°−4°. Snow 0–6 in0–15 cm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Snow, 29°−1°
  30% chance · 0.6 in1.5 cm
2. Afternoon
  noon–6 PM
  Drizzle, 34°1°
  30% chance · 0.4 in1 cm
3. Evening
  6 PM–midnight
  Snow, 29°−2°
  20% chance · 0.4 in1 cm
4. Overnight
  midnight–6 AM
  Partly cloudy, 25°−4°
  20% chance · 0.2 in0.4 cm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
31°−1°–36°2°
Low, likely
21°−6°–28°−2°
Wind
12 mph19 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 36°2°, low 24°−4°. Rain 0.03 in0.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 26°−3°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 36°2°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 32°0°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 32°0°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
32°0°–42°6°
Low, likely
21°−6°–28°−2°
Wind
15 mph23 km/h, gusts 21 mph34 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 39°4°, low 29°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 41°5°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 35°2°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
30°−1°–51°11°
Low, likely
27°−3°–33°1°
Wind
9 mph14 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 38°, low 26°.
Tomorrow
Dry, high 38°, low 26°.
Monday
Dry, high 44°, low 31°, warming up.
Rest of week
Highs 33–41°; chance of precipitation on Tuesday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (TFX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Jefferson River near Silver Star at Parsons Bridge

9.7 mi

Level: 4.2 ft
Flow: 1,020 cfs

Reading from Sat 8:30 AM · NWS gauge page

Willow Creek (Southwest MT) near Harrison

14 mi

Level: 1.8 ft

Reading from Sat 12:15 AM · NWS gauge page

Jefferson River near Twin Bridges

16 mi

Below flood stage

Level: 4.0 ft
Flow: 1,340 cfs

Reading from Sat 8:15 AM · NWS gauge page

Beaverhead River at Twin Bridges

18 mi

Level: 3.3 ft
Flow: 688 cfs

Reading from Sat 8:30 AM · NWS gauge page

Sun & moon

Sun

Daylight: 10 h 30 min; Losing 3 min 3 s a day; shortest Dec 21, 1 h 49 min less
Golden hour: 5:45–6:45 PM; Morning 7:38–8:38 AM
Blue hour: 6:45–6:57 PM; Morning 7:26–7:38 AM; first light 7:26 AM

Stars tonight? Fair

Clear 7 PM–7:27 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 6:12 AM · rises 5:27 PM
Full moon: Oct 25
New moon: Nov 9

Looking south from Mammoth. The highest point on the skyline is about 10,400 ft, 4 mi away.Skyline from USGS elevation data. Sky, sun and moon as they are now.