Observed 9:55 AM MDT at KLVM

South Glastonbury, MT weather

Sunny and 25°−4°.

Mostly agree

Now 25°−4°

Sunny · Feels like 15°−9°

Feels like: 15°−9°; Wind chill from 9 mph15 km/h wind · air 25°−4°
Wind: 9 mph15 km/h; From the north-northwest. 35–9 mph15 km/h through 10 PM
Dew point: 21°−6°; Dry · up to 32°0° by 1 PM
UV index: 1Low; Moderate 1–3 PM · peak 3
Pressure: 30.37 inHg1028 hPa; Falling · −0.07 inHg−2.3 hPa in 3 h

Light snow now, through the next 2 hours.

From forecast models

Next 48 hours

23°13° cooler than this time yesterday (45°7° then, 22°−6° now)

Good hours for

Above 40°4° today by 1 PM
High 47°8° today at 4 PM
Below 40°4° tonight after 7 PM
Hard freeze tonight 11 PM–10 AM (low 27°−3°)
Hard freeze tomorrow night 10 PM–9 AM (low 27°−3°)

This morningNear 34°1° · freezing, low 32°0° · Clear
This afternoonUp to 47°8° by 4 PM · Clear
TonightDown to 27°−3° by 5 AM · freezing, low 27°−3° · Clear
Tomorrow morningUp to 39°4° by 11 AM · freezing, low 28°−2° · Clear
Tomorrow afternoonUp to 47°8° by 3 PM · Clear
Tomorrow nightDown to 27°−3° by 4 AM · freezing, low 27°−3° · Partly cloudy
Monday morningUp to 33°1° by 9 AM · freezing, low 28°−2° · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 10a	Sunny	32°0° (likely 30°−1° to 35°2°)	26°−3°	0%	7 mph11 km/h from SW, gusts 7 mph11 km/h	84%	3%	1
Sat 11a	Sunny	35°2° (likely 34°1° to 39°4°)	30°−1°	0%	6 mph10 km/h from SW, gusts 8 mph13 km/h	73%	1%	2
Sat 12p	Sunny	38°3° (likely 38°3° to 44°7°)	34°1°	0%	6 mph10 km/h from SW, gusts 10 mph16 km/h	70%	0%	2
Sat 1p	Sunny	41°5° (likely 41°5° to 48°9°)	37°3°	0%	6 mph10 km/h from S, gusts 8 mph13 km/h	70%	0%	3
Sat 2p	Sunny	44°7° (likely 44°7° to 51°11°)	41°5°	0%	5 mph8 km/h from ESE, gusts 10 mph16 km/h	61%	0%	3
Sat 3p	Sunny	46°8° (likely 46°8° to 53°12°)	44°7°	0%	5 mph8 km/h from E, gusts 9 mph14 km/h	50%	8%	2
Sat 4p	Sunny	47°8° (likely 47°8° to 52°11°)	44°7°	0%	6 mph10 km/h from ENE, gusts 12 mph20 km/h	50%	8%	1
Sat 5p	Sunny	46°8° (likely 46°8° to 49°9°)	43°6°	0%	6 mph10 km/h from ENE, gusts 12 mph19 km/h	55%	2%	1
Sat 6p	Clear	42°6° (likely 42°6° to 46°8°)	40°4°	0%	5 mph8 km/h from ENE, gusts 9 mph15 km/h	74%	0%	1
Sat 7p	Clear	39°4° (likely 38°3° to 43°6°)	37°3°	0%	3 mph5 km/h from E, gusts 7 mph12 km/h	87%	0%	0
Sat 8p	Clear	35°2° (likely 35°2° to 41°5°)	33°1°	0%	3 mph5 km/h from WSW, gusts 5 mph9 km/h	91%	0%	0
Sat 9p	Clear	34°1° (likely 33°1° to 39°4°)	30°−1°	0%	5 mph8 km/h from SW, gusts 5 mph8 km/h	96%	0%	0
Sat 10p	Clear	33°1° (likely 31°−1° to 38°3°)	29°−2°	0%	5 mph8 km/h from SW, gusts 5 mph7 km/h	95%	0%	0
Sat 11p	Clear	32°0° (likely 30°−1° to 37°3°)	27°−3°	0%	5 mph8 km/h from S, gusts 4 mph7 km/h	95%	0%	0
Sun 12a	Clear	31°−1° (likely 29°−2° to 37°3°)	25°−4°	0%	6 mph10 km/h from S, gusts 5 mph8 km/h	97%	0%	0
Sun 1a	Clear	30°−1° (likely 28°−2° to 37°3°)	24°−4°	0%	6 mph10 km/h from SW, gusts 5 mph8 km/h	95%	0%	0
Sun 2a	Clear	29°−2° (likely 27°−3° to 37°3°)	24°−4°	0%	5 mph8 km/h from WSW, gusts 6 mph9 km/h	95%	0%	0
Sun 3a	Clear	29°−2° (likely 26°−3° to 36°2°)	24°−4°	0%	5 mph8 km/h from W, gusts 6 mph9 km/h	96%	0%	0
Sun 4a	Clear	28°−2° (likely 26°−3° to 36°2°)	23°−5°	0%	5 mph8 km/h from W, gusts 5 mph8 km/h	96%	0%	0
Sun 5a	Clear	27°−3° (likely 25°−4° to 36°2°)	23°−5°	0%	3 mph5 km/h from SW, gusts 5 mph8 km/h	100%	0%	0
Sun 6a	Clear	28°−2° (likely 25°−4° to 36°2°)	24°−4°	0%	3 mph5 km/h from SSE, gusts 5 mph7 km/h	98%	0%	0
Sun 7a	Clear	28°−2° (likely 25°−4° to 37°3°)	24°−4°	0%	3 mph5 km/h from SSE, gusts 4 mph7 km/h	100%	0%	0
Sun 8a	Sunny	28°−2° (likely 24°−4° to 37°3°)	24°−4°	0%	3 mph5 km/h from SSE, gusts 4 mph6 km/h	100%	0%	0
Sun 9a	Sunny	31°−1° (likely 25°−4° to 39°4°)	31°−1°	0%	2 mph3 km/h from SE, gusts 4 mph6 km/h	98%	0%	0
Sun 10a	Sunny	36°2° (likely 32°0° to 42°6°)	36°2°	0%	2 mph3 km/h from SE, gusts 5 mph8 km/h	97%	0%	1
Sun 11a	Sunny	39°4° (likely 37°3° to 44°7°)	39°4°	0%	2 mph3 km/h from SE, gusts 5 mph8 km/h	94%	1%	2
Sun 12p	Sunny	42°6° (likely 41°5° to 47°8°)	40°4°	0%	3 mph5 km/h from NE, gusts 7 mph11 km/h	92%	0%	3
Sun 1p	Sunny	44°7° (likely 43°6° to 49°9°)	42°6°	0%	3 mph5 km/h from NE, gusts 9 mph14 km/h	90%	0%	4
Sun 2p	Sunny	46°8° (likely 45°7° to 50°10°)	45°7°	0%	3 mph5 km/h from NE, gusts 9 mph14 km/h	85%	0%	4
Sun 3p	Sunny	47°8° (likely 46°8° to 52°11°)	43°6°	0%	7 mph11 km/h from NE, gusts 11 mph17 km/h	58%	6%	4
Sun 4p	Sunny	46°8° (likely 45°7° to 53°12°)	43°6°	0%	7 mph11 km/h from NE, gusts 13 mph21 km/h	58%	1%	3
Sun 5p	Sunny	45°7° (likely 42°6° to 52°11°)	41°5°	0%	7 mph11 km/h from NE, gusts 15 mph25 km/h	62%	1%	2
Sun 6p	Clear	41°5° (likely 38°3° to 48°9°)	38°3°	0%	5 mph8 km/h from NE, gusts 15 mph24 km/h	78%	0%	1
Sun 7p	Clear	36°2° (likely 35°2° to 44°7°)	32°0°	0%	5 mph8 km/h from NE, gusts 13 mph21 km/h	89%	6%	0
Sun 8p	Mostly clear	35°2° (likely 32°0° to 41°5°)	31°−1°	0%	5 mph8 km/h from NE, gusts 11 mph18 km/h	90%	46%	0
Sun 9p	Cloudy	33°1° (likely 31°−1° to 38°3°)	30°−1°	0%	3 mph5 km/h from SE, gusts 10 mph17 km/h	90%	58%	0
Sun 10p	Cloudy	32°0° (likely 29°−2° to 37°3°)	29°−2°	0%	3 mph5 km/h from SE, gusts 7 mph11 km/h	91%	60%	0
Sun 11p	Cloudy	31°−1° (likely 27°−3° to 38°3°)	28°−2°	0%	3 mph5 km/h from SE, gusts 5 mph8 km/h	92%	60%	0
Mon 12a	Mostly clear	30°−1° (likely 26°−3° to 37°3°)	26°−3°	0%	3 mph5 km/h from S, gusts 4 mph7 km/h	95%	43%	0
Mon 1a	Mostly clear	30°−1° (likely 26°−3° to 37°3°)	26°−3°	0%	3 mph5 km/h from S, gusts 5 mph7 km/h	95%	49%	0
Mon 2a	Mostly clear	29°−2° (likely 25°−4° to 37°3°)	25°−4°	0%	3 mph5 km/h from S, gusts 5 mph8 km/h	96%	51%	0
Mon 3a	Mostly clear	28°−2° (likely 23°−5° to 38°3°)	21°−6°	0%	6 mph10 km/h from S, gusts 6 mph9 km/h	97%	50%	0
Mon 4a	Mostly clear	27°−3° (likely 23°−5° to 38°3°)	21°−6°	0%	6 mph10 km/h from S, gusts 6 mph9 km/h	98%	53%	0
Mon 5a	Mostly clear	27°−3° (likely 24°−4° to 38°3°)	21°−6°	0%	6 mph10 km/h from S, gusts 6 mph9 km/h	99%	43%	0
Mon 6a	Partly cloudy	28°−2° (likely 24°−4° to 39°4°)	20°−7°	0%	7 mph11 km/h from S, gusts 6 mph10 km/h	99%	37%	0
Mon 7a	Clear	28°−2° (likely 26°−3° to 43°6°)	21°−6°	0%	7 mph11 km/h from S, gusts 9 mph14 km/h	100%	16%	0
Mon 8a	Sunny	30°−1° (likely 26°−3° to 43°6°)	23°−5°	0%	7 mph11 km/h from S, gusts 9 mph15 km/h	100%	16%	0
Mon 9a	Partly sunny	33°1° (likely 30°−1° to 45°7°)	24°−4°	0%	10 mph16 km/h from S, gusts 10 mph16 km/h	98%	25%	0

Days ahead

Tap a day for its hours and the official wording.

Today, Oct 24. Sunny. High 47°8°, low 27°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 47°8°
  Dry
3. Evening
  6 PM–midnight
  Clear, 35°2°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 27°−3°
  Dry
Official NWS forecast
Today: Sunny, with a high near 47. East southeast wind around 7 mph.
Tonight: Patchy fog after 9pm. Mostly clear, with a low around 27. Southwest wind around 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
47°8°–53°12°
Low, likely
23°−5°–29°−2°
Wind
14 mph22 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 47°8°, low 27°−3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 28°−2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 47°8°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 35°2°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 27°−3°
  Dry
Official NWS forecast
Day: Patchy fog before noon. Sunny. High near 47, with temperatures falling to around 45 in the afternoon. East wind 2 to 7 mph.
Night: Mostly clear, with a low around 27. Southeast wind around 6 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
46°8°–53°12°
Low, likely
24°−4°–35°2°
Wind
15 mph24 km/h, gusts 21 mph33 km/h
UV peak
4
Monday, Oct 26. Partly sunny. High 54°12°, low 32°0°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 30°−1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 58°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 45°7°
  30% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Cloudy, 39°4°
  50% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny. High near 54, with temperatures falling to around 50 in the afternoon. South wind 7 to 10 mph.
Night: A chance of rain showers before 3am, then a chance of rain and snow showers. Partly cloudy, with a low around 32. South wind 7 to 12 mph. Chance of precipitation is 50%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
53°12°–59°15°
Low, likely
22°−6°–37°3°
Wind
9 mph15 km/h, gusts 28 mph45 km/h
UV peak
4
Tuesday, Oct 27. Snow. High 46°8°, low 29°−2°. Snow 0.06 in1.5 mm, 70% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 40°4°
  60% chance · 0.02 in0.6 mm
2. Afternoon
  noon–6 PM
  Drizzle, 46°8°
  50% chance
3. Evening
  6 PM–midnight
  Drizzle, 39°4°
  30% chance
4. Overnight
  midnight–6 AM
  Partly cloudy, 35°2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain and snow showers likely before 9am, then rain and snow showers likely between 9am and 3pm, then rain and snow showers likely. Mostly cloudy. High near 46, with temperatures falling to around 44 in the afternoon. South southwest wind 8 to 13 mph. Chance of precipitation is 70%.
Night: A chance of rain showers before 3am, then a chance of rain and snow showers. Mostly cloudy, with a low around 29. South southwest wind 10 to 17 mph. Chance of precipitation is 40%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
42°6°–48°9°
Low, likely
29°−2°–38°3°
Wind
11 mph18 km/h, gusts 30 mph49 km/h
UV peak
3
Wednesday, Oct 28. Partly sunny. High 49°9°, low 29°−2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 48°9°
  Dry
3. Evening
  6 PM–midnight
  Clear, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 35°2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny. High near 49, with temperatures falling to around 47 in the afternoon. South southwest wind 13 to 16 mph.
Night: Partly cloudy. Low around 29, with temperatures rising to around 31 overnight. South wind 9 to 18 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
44°7°–49°9°
Low, likely
28°−2°–38°3°
Wind
12 mph19 km/h, gusts 32 mph52 km/h
UV peak
4
Thursday, Oct 29. Snow. High 51°11°, low 31°−1°. Snow 0.03 in0.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 52°11°
  20% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Drizzle, 44°7°
  30% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Cloudy, 40°5°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain and snow showers. Mostly sunny. High near 51, with temperatures falling to around 48 in the afternoon. South wind 8 to 12 mph. Chance of precipitation is 20%.
Night: A chance of rain showers before 3am, then a chance of snow showers. Mostly cloudy, with a low around 31. South wind around 10 mph. Chance of precipitation is 30%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
48°9°–54°12°
Low, likely
27°−3°–38°3°
Wind
11 mph18 km/h, gusts 33 mph53 km/h
UV peak
3
Friday, Oct 30. Snow. High 53°12°, low 31°−1°. Snow 0.1 in2.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 41°5°
  30% chance · 0.02 in0.6 mm
2. Afternoon
  noon–6 PM
  Drizzle, 48°9°
  30% chance · 0.04 in1.1 mm
3. Evening
  6 PM–midnight
  Drizzle, 41°5°
  30% chance · 0.02 in0.5 mm
4. Overnight
  midnight–6 AM
  Partly cloudy, 36°2°
  30% chance · 0.1 in0.4 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow showers before 9am, then a chance of rain showers. Partly sunny. High near 53, with temperatures falling to around 50 in the afternoon. South wind around 10 mph. Chance of precipitation is 30%.
Night: A chance of rain showers. Mostly cloudy. Low around 31, with temperatures rising to around 33 overnight. South southwest wind 7 to 10 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
41°5°–53°12°
Low, likely
29°−2°–39°4°
Wind
12 mph20 km/h, gusts 32 mph51 km/h
UV peak
3
Saturday, Oct 31. Drizzle. High 41°5°, low 28°−2°. Rain 0.1 in2.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  30% chance · 0.02 in0.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 42°5°
  20% chance · 0.1 in0.3 cm
3. Evening
  6 PM–midnight
  Drizzle, 35°1°
  20% chance · 0.02 in0.6 mm
4. Overnight
  midnight–6 AM
  Cloudy, 29°−2°
  20% chance
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
36°2°–46°8°
Low, likely
22°−6°–33°1°
Wind
9 mph14 km/h, gusts 19 mph30 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 43°6°, low 26°−3°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 30°−1°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 45°7°
  Dry
3. Evening
  6 PM–midnight
  Clear, 36°2°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 34°1°
  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
37°3°–49°9°
Low, likely
22°−6°–34°1°
Wind
8 mph13 km/h, gusts 20 mph32 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 45°7°, low 29°−2°. Rain 0.1 in2.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Snow, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 48°9°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 38°3°
  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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
37°3°–59°15°
Low, likely
24°−4°–33°1°
Wind
8 mph14 km/h, gusts 17 mph28 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 47°, low 27°.
Tomorrow
Dry, high 47°, low 27°.
Monday
Dry, high 54°, low 32°, warming up.
Rest of week
Highs 41–53°; chance of precipitation on Tuesday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (BYZ) (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

Mill Creek near Emigrant

10 mi

Level: 1.5 ft

Reading from Sat 8:15 AM · NWS gauge page

Yellowstone River at Corwin Springs

14 mi

Below flood stage

Level: 1.3 ft
Flow: 1,090 cfs

Reading from Sat 8 AM · NWS gauge page

Gallatin River above Deer Creek near Big Sky

20 mi

Level: 4.9 ft

Reading from Sat 7:30 AM · NWS gauge page

Hyalite Creek near S 19th near Gallatin Gateway

22 mi

Level: 2.3 ft

Reading from Sat 7:30 AM · NWS gauge page

Sun & moon

Sun

Daylight: 10 h 31 min; Losing 2 min 58 s a day; shortest Dec 21, 1 h 47 min less
Golden hour: 5:41–6:41 PM; Morning 7:33–8:33 AM
Blue hour: 6:41–6:52 PM; Morning 7:21–7:33 AM; first light 7:21 AM

Stars tonight? Fair

Clear 6:52 PM–7:22 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 6:06 AM · rises 5:23 PM
Full moon: Oct 25
New moon: Nov 9

Looking southeast from South Glastonbury. The highest point on the skyline is about 10,700 ft, 20 mi away.Skyline from USGS elevation data, heights drawn up to 2× taller. Sky, sun and moon as they are now.