Model estimate for 7:00 AM MDT (no recent station report)

St. Mary, MT weather

Overcast and 24°−4°.

Forecasts differ

Now 24°−4°

Cloudy

Wind: Calm; Up to 5 mph8 km/h through 7 PM
Dew point: 21°−6°; Dry, static shocks likely
Humidity: 88%; Air 24°−4°, dew point 21°−6° · frost likely
UV index: 0Low; Moderate 2–4 PM · peak 3

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Hard freeze until 10 AM (low 24°−4°)
Above 30°−1° today by 10 AM
High 44°7° today at 1 PM
Hard freeze tonight 9 PM–noon (low 21°−6°)
Hard freeze tomorrow night from 7 PM (low 21°−6°)

This morningUp to 40°4° by 11 AM · freezing, low 24°−4° · Mostly cloudy
This afternoonNear 43°6° · Partly cloudy
TonightDown to 23°−5° by 5 AM · freezing, low 23°−5° · Cloudy
Tomorrow morningUp to 31°−1° by 11 AM · freezing, low 21°−6° · Cloudy
Tomorrow afternoonUp to 37°3° by 3 PM · Cloudy
Tomorrow nightDown to 22°−6° by 5 AM · freezing, low 22°−6° · 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 7a	Cloudy	24°−4° (likely 24°−4° to 34°1°)	24°−4°	5%	2 mph3 km/h from SSE, gusts 9 mph14 km/h	88%	93%	0
Sat 8a	Cloudy	26°−3° (likely 26°−3° to 35°2°)	26°−3°	0%	2 mph3 km/h from SSE, gusts 11 mph17 km/h	88%	81%	0
Sat 9a	Partly sunny	28°−2° (likely 28°−2° to 35°2°)	28°−2°	0%	2 mph3 km/h from SSE, gusts 12 mph20 km/h	88%	72%	0
Sat 10a	Partly sunny	37°3° (likely 34°1° to 39°4°)	37°3°	0%	2 mph3 km/h from SSE, gusts 14 mph22 km/h	67%	56%	0
Sat 11a	Partly sunny	40°4° (likely 36°2° to 42°6°)	37°3°	0%	3 mph5 km/h from S, gusts 15 mph24 km/h	62%	64%	2
Sat 12p	Partly sunny	43°6° (likely 38°3° to 44°7°)	41°5°	0%	3 mph5 km/h from SSW, gusts 18 mph29 km/h	56%	67%	2
Sat 1p	Partly sunny	44°7° (likely 39°4° to 45°7°)	41°5°	0%	5 mph8 km/h from SW, gusts 19 mph30 km/h	52%	56%	2
Sat 2p	Sunny	44°7° (likely 40°4° to 47°8°)	41°5°	0%	5 mph8 km/h from SW, gusts 17 mph27 km/h	49%	24%	3
Sat 3p	Mostly sunny	44°7° (likely 40°4° to 47°8°)	41°5°	0%	5 mph8 km/h from SW, gusts 16 mph25 km/h	47%	24%	3
Sat 4p	Partly sunny	44°7° (likely 40°4° to 48°9°)	41°5°	0%	5 mph8 km/h from SW, gusts 14 mph22 km/h	47%	53%	2
Sat 5p	Partly sunny	43°6° (likely 39°4° to 47°8°)	41°5°	0%	3 mph5 km/h from SSW, gusts 13 mph21 km/h	50%	69%	1
Sat 6p	Cloudy	40°4° (likely 36°2° to 43°6°)	38°3°	0%	3 mph5 km/h from S, gusts 9 mph15 km/h	57%	71%	0
Sat 7p	Mostly cloudy	37°3° (likely 33°1° to 38°3°)	37°3°	0%	2 mph3 km/h from S, gusts 12 mph20 km/h	67%	69%	0
Sat 8p	Cloudy	33°1° (likely 32°0° to 36°2°)	33°1°	0%	2 mph3 km/h from SE, gusts 12 mph19 km/h	72%	77%	0
Sat 9p	Cloudy	31°−1° (likely 31°−1° to 34°1°)	31°−1°	0%	2 mph3 km/h from E, gusts 9 mph15 km/h	76%	96%	0
Sat 10p	Cloudy	30°−1° (likely 30°−1° to 34°1°)	30°−1°	0%	2 mph3 km/h from NE, gusts 8 mph13 km/h	79%	98%	0
Sat 11p	Cloudy	27°−3° (likely 27°−3° to 34°1°)	27°−3°	0%	2 mph3 km/h from NE, gusts 8 mph13 km/h	87%	99%	0
Sun 12a	Cloudy	27°−3° (likely 27°−3° to 35°2°)	27°−3°	5%	2 mph3 km/h from NE, gusts 9 mph15 km/h	83%	99%	0
Sun 1a	Cloudy	26°−3° (likely 26°−3° to 35°2°)	26°−3°	5%	2 mph3 km/h from NNE, gusts 9 mph14 km/h	83%	100%	0
Sun 2a	Cloudy	27°−3° (likely 27°−3° to 34°1°)	27°−3°	5%	2 mph3 km/h from NNE, gusts 8 mph13 km/h	79%	100%	0
Sun 3a	Cloudy	26°−3° (likely 26°−3° to 33°1°)	22°−6°	0%	3 mph5 km/h from NE, gusts 10 mph16 km/h	76%	100%	0
Sun 4a	Cloudy	25°−4° (likely 25°−4° to 32°0°)	21°−6°	0%	3 mph5 km/h from NE, gusts 11 mph17 km/h	79%	100%	0
Sun 5a	Cloudy	23°−5° (likely 23°−5° to 31°−1°)	18°−8°	0%	3 mph5 km/h from NE, gusts 11 mph18 km/h	79%	100%	0
Sun 6a	Cloudy	22°−6° (likely 22°−6° to 30°−1°)	22°−6°	0%	2 mph3 km/h from ENE, gusts 11 mph18 km/h	78%	98%	0
Sun 7a	Cloudy	22°−6° (likely 22°−6° to 29°−2°)	22°−6°	0%	2 mph3 km/h from ENE, gusts 11 mph17 km/h	79%	99%	0
Sun 8a	Cloudy	21°−6° (likely 21°−6° to 29°−2°)	21°−6°	0%	2 mph3 km/h from ENE, gusts 10 mph17 km/h	83%	100%	0
Sun 9a	Cloudy	23°−5° (likely 23°−5° to 29°−2°)	18°−8°	0%	3 mph5 km/h from E, gusts 10 mph17 km/h	77%	100%	0
Sun 10a	Cloudy	29°−2° (likely 26°−3° to 29°−2°)	25°−4°	0%	3 mph5 km/h from E, gusts 10 mph17 km/h	69%	100%	1
Sun 11a	Cloudy	31°−1° (likely 27°−3° to 31°−1°)	28°−2°	0%	3 mph5 km/h from E, gusts 10 mph17 km/h	63%	100%	1
Sun 12p	Cloudy	33°1° (likely 28°−2° to 33°1°)	28°−2°	0%	6 mph10 km/h from E, gusts 11 mph17 km/h	57%	100%	2
Sun 1p	Cloudy	35°2° (likely 29°−2° to 35°2°)	30°−1°	0%	6 mph10 km/h from E, gusts 10 mph17 km/h	55%	98%	2
Sun 2p	Cloudy	36°2° (likely 30°−1° to 36°2°)	31°−1°	0%	6 mph10 km/h from E, gusts 11 mph18 km/h	51%	96%	3
Sun 3p	Cloudy	37°3° (likely 30°−1° to 37°3°)	32°0°	0%	6 mph10 km/h from E, gusts 12 mph19 km/h	52%	94%	2
Sun 4p	Cloudy	37°3° (likely 30°−1° to 37°3°)	32°0°	0%	6 mph10 km/h from E, gusts 11 mph18 km/h	52%	92%	2
Sun 5p	Cloudy	36°2° (likely 29°−2° to 36°2°)	31°−1°	0%	6 mph10 km/h from E, gusts 11 mph17 km/h	55%	95%	1
Sun 6p	Cloudy	35°2° (likely 28°−2° to 35°2°)	31°−1°	0%	5 mph8 km/h from E, gusts 11 mph18 km/h	61%	96%	0
Sun 7p	Cloudy	32°0° (likely 30°−1° to 32°0°)	27°−3°	0%	5 mph8 km/h from E, gusts 12 mph19 km/h	69%	96%	0
Sun 8p	Cloudy	30°−1° (likely 29°−2° to 31°−1°)	25°−4°	0%	5 mph8 km/h from E, gusts 12 mph19 km/h	73%	96%	0
Sun 9p	Cloudy	29°−2° (likely 28°−2° to 31°−1°)	25°−4°	0%	3 mph5 km/h from ESE, gusts 10 mph17 km/h	75%	96%	0
Sun 10p	Cloudy	28°−2° (likely 28°−2° to 30°−1°)	24°−4°	0%	3 mph5 km/h from ESE, gusts 10 mph17 km/h	77%	96%	0
Sun 11p	Cloudy	27°−3° (likely 27°−3° to 30°−1°)	23°−5°	0%	3 mph5 km/h from ESE, gusts 10 mph17 km/h	78%	93%	0
Mon 12a	Cloudy	26°−3° (likely 26°−3° to 30°−1°)	26°−3°	0%	1 mph2 km/h from ESE, gusts 10 mph16 km/h	79%	92%	0
Mon 1a	Cloudy	26°−3° (likely 26°−3° to 31°−1°)	26°−3°	0%	1 mph2 km/h from ESE, gusts 9 mph15 km/h	78%	89%	0
Mon 2a	Cloudy	25°−4° (likely 25°−4° to 30°−1°)	25°−4°	0%	1 mph2 km/h from ESE, gusts 7 mph11 km/h	78%	87%	0
Mon 3a	Mostly cloudy	25°−4° (likely 25°−4° to 29°−2°)	25°−4°	0%	1 mph2 km/h from ESE, gusts 5 mph9 km/h	77%	87%	0
Mon 4a	Mostly cloudy	24°−4° (likely 24°−4° to 29°−2°)	24°−4°	0%	1 mph2 km/h from ESE, gusts 5 mph8 km/h	78%	88%	0
Mon 5a	Mostly cloudy	22°−6° (likely 22°−6° to 30°−1°)	22°−6°	0%	1 mph2 km/h from ESE, gusts 4 mph6 km/h	80%	91%	0
Mon 6a	Mostly cloudy	21°−6° (likely 21°−6° to 31°−1°)	21°−6°	0%	0 mph0 km/h, gusts 4 mph6 km/h	81%	91%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Cloudy. High 44°7°, low 20°−7°. Typical 46°8° / 30°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 26°−3°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 44°7°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 33°1°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 23°−5°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 44. South southwest wind around 5 mph.
Tonight: Mostly cloudy. Low around 20, with temperatures rising to around 23 overnight. East northeast wind around 3 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
41°5°–48°9°
Low, likely
20°−7°–31°−1°
Typical high / low
46°8° / 30°−1°
Wind
12 mph20 km/h, gusts 24 mph38 km/h
UV peak
3
Tomorrow, Oct 25. Cloudy. High 37°3°, low 20°−7°. Typical 45°7° / 30°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 21°−6°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 37°3°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 30°−1°
  Dry
4. Overnight
  midnight–6 AM
  Mostly cloudy, 22°−6°
  Dry
Official NWS forecast
Day: Mostly cloudy, with a high near 37. East wind 2 to 6 mph.
Night: Cloudy, with a low around 20. East southeast wind 1 to 5 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
31°−1°–37°3°
Low, likely
20°−7°–29°−2°
Typical high / low
45°7° / 30°−1°
Wind
8 mph13 km/h, gusts 18 mph29 km/h
UV peak
3
Monday, Oct 26. Mostly cloudy. High 47°8°, low 27°−3°. Typical 45°7° / 29°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 29°−2°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 43°6°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 34°1°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 36°2°
  30% chance · 0.1 in0.3 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 47. South southeast wind 0 to 3 mph.
Night: Mostly cloudy, with a low around 27. South southwest wind around 2 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
39°4°–47°8°
Low, likely
24°−4°–28°−2°
Typical high / low
45°7° / 29°−2°
Wind
9 mph14 km/h, gusts 18 mph29 km/h
UV peak
3
Tuesday, Oct 27. Snow. High 45°7°, low 25°−4°. Typical 44°7° / 29°−2°. Snow 0–3 in0–8 cm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 38°3°
  40% chance · 0.2 in0.4 cm
2. Afternoon
  noon–6 PM
  Cloudy, 42°5°
  50% chance · 0.02 in0.5 mm
3. Evening
  6 PM–midnight
  Drizzle, 38°3°
  60% chance · 0.1 in0.3 cm
4. Overnight
  midnight–6 AM
  Snow, 34°1°
  50% chance · 0.02 in0.5 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain and snow. Partly sunny, with a high near 45. West southwest wind 3 to 9 mph, with gusts as high as 18 mph.
Night: A chance of rain before 9pm, then a chance of snow. Mostly cloudy, with a low around 25. West wind 3 to 8 mph, with gusts as high as 20 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
36°2°–45°7°
Low, likely
25°−4°–37°3°
Typical high / low
44°7° / 29°−2°
Wind
16 mph25 km/h, gusts 39 mph62 km/h
UV peak
3
Wednesday, Oct 28. Snow. High 39°4°, low 20°−7°. Typical 44°7° / 29°−2°. Snow 0–2 in0–5 cm, 70% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Snow, 33°1°
  50% chance · 0.3 in0.7 cm
2. Afternoon
  noon–6 PM
  Snow, 35°2°
  60% chance · 0.3 in0.9 cm
3. Evening
  6 PM–midnight
  Snow, 30°−1°
  60% chance · 0.3 in0.7 cm
4. Overnight
  midnight–6 AM
  Snow, 27°−3°
  60% chance · 0.2 in0.5 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: Snow likely. Mostly cloudy, with a high near 39. New snow accumulation of less than half an inch possible.
Night: Snow likely. Mostly cloudy, with a low around 20. New snow accumulation of less than one inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
35°2°–40°4°
Low, likely
20°−7°–34°1°
Typical high / low
44°7° / 29°−2°
Wind
11 mph18 km/h, gusts 34 mph55 km/h
UV peak
2
Thursday, Oct 29. Snow. High 38°3°, low 20°−7°. Typical 44°7° / 29°−2°. Snow 0–2 in0–5 cm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Snow, 25°−4°
  50% chance · 0.2 in0.4 cm
2. Afternoon
  noon–6 PM
  Snow, 29°−2°
  40% chance · 0.2 in0.4 cm
3. Evening
  6 PM–midnight
  Snow, 26°−3°
  40% chance · 0.3 in0.8 cm
4. Overnight
  midnight–6 AM
  Snow, 25°−4°
  40% chance · 0.3 in0.8 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow. Mostly cloudy, with a high near 38. New snow accumulation of less than half an inch possible.
Night: A chance of snow. Mostly cloudy, with a low around 20. Little or no snow accumulation expected.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
25°−4°–38°3°
Low, likely
20°−7°–26°−3°
Typical high / low
44°7° / 29°−2°
Wind
10 mph17 km/h, gusts 26 mph42 km/h
UV peak
3
Friday, Oct 30. Snow. High 42°6°, low 22°−6°. Typical 43°6° / 28°−2°. Snow 0–3 in0–8 cm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Snow, 24°−4°
  30% chance · 0.3 in0.7 cm
2. Afternoon
  noon–6 PM
  Cloudy, 32°0°
  20% chance · 0.02 in0.4 mm
3. Evening
  6 PM–midnight
  Clear, 29°−2°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 26°−3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of snow. Partly sunny, with a high near 42.
Night: A slight chance of snow before midnight. Partly cloudy, with a low around 22.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
26°−3°–42°6°
Low, likely
19°−7°–27°−3°
Typical high / low
43°6° / 28°−2°
Wind
13 mph20 km/h, gusts 26 mph41 km/h
UV peak
2
Saturday, Oct 31. Mostly sunny. High 33°1°, low 21°−6°. Typical 43°6° / 28°−2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 25°−4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 34°1°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 27°−3°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 26°−3°
  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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
32°0°–35°2°
Low, likely
18°−8°–27°−3°
Typical high / low
43°6° / 28°−2°
Wind
28 mph44 km/h, gusts 33 mph53 km/h
UV peak
3
Sunday, Nov 1. Mostly sunny. High 34°1°, low 25°−4°. Typical 43°6° / 28°−2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 28°−2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 34°1°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 32°0°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 30°−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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
32°0°–37°3°
Low, likely
23°−5°–26°−3°
Typical high / low
43°6° / 28°−2°
Wind
23 mph37 km/h, gusts 40 mph64 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 38°3°, low 26°−3°. Typical 42°6° / 28°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 33°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 41°5°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 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°–47°8°
Low, likely
20°−7°–32°0°
Typical high / low
42°6° / 28°−2°
Wind
19 mph31 km/h, gusts 31 mph50 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 44°, low 20°.
Tomorrow
Dry, high 37°, low 20°, cooling off.
Monday
Dry, high 47°, low 27°, warming up.
Rest of week
Highs 33–45°; chance of precipitation on Wednesday.

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

Saint Mary River near Babb

6.2 mi

Level: 2.0 ft
Flow: 80 cfs

Reading from Sat 5:15 AM · NWS gauge page

Swiftcurrent Creek at Sherburne nr Babb

7.3 mi

Level: 2.1 ft

Reading from Sat 5 AM · NWS gauge page

Swiftcurrent Creek at Sherburne Reservoir near Babb

7.3 mi

Level: 4742 ft

Reading from Sat 5 AM · NWS gauge page

Swiftcurrent Creek at Many Glacier near Babb

11 mi

Level: 1.6 ft

Reading from Sat 5:30 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 66% less heating than a typical week.

This week 67Typical 198

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 47
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 1 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 21°F). Indoor air will run dry too — a humidifier keeping indoor relative humidity in the 30–50% range is more comfortable and cuts static shocks, without going so high it fogs cold windows.

Open the windows?

No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.

Is this typical?

St. Mary 1 Ssw · official normals 1991–2020 · records 2003–2026

Oct 24, today vs a typical year

Today’s expected high is 2°1° colder than typical.

Last 7 days vs normal

—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

St. Mary weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 19 min; Losing 3 min 17 s a day; shortest Dec 21, 2 h 3 min less
Golden hour: 5:42–6:46 PM; Morning 7:48–8:52 AM
Blue hour: 6:46–6:59 PM; Morning 7:35–7:48 AM; first light 7:35 AM

Stars tonight? Unknown

Cloud forecast not available for tonight.

Moon

Waxing gibbous

97% lit · growing

Today: sets 6:21 AM · rises 5:28 PM
Full moon: Oct 25
New moon: Nov 9

Looking southwest from St. Mary. The highest point on the skyline is about 9,800 ft, 18 mi away.Skyline from USGS elevation data, heights drawn up to 3× taller. Sky, sun and moon as they are now.