Observed 5:45 AM MDT at KCTB

Shelby, MT weather

Overcast and 28°−2°, 10°6° colder than a typical Oct 24.

Mostly agree

Now 28°−2°

Cloudy · Feels like 23°−5°

Feels like: 23°−5°; Wind chill from 5 mph7 km/h wind · air 28°−2°
Wind: 5 mph7 km/h; From the southeast. Up to 8 mph13 km/h through 6 PM
Dew point: 25°−4°; Dry, static shocks likely
UV tomorrow: 3Moderate; Moderate 12–4 PM · peak 3
Air quality: 5Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.29 inHg1026 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Hard freeze until 11 AM (low 24°−4°)
Fog until 7 AM
Above 30°−1° today by 10 AM
Hard freeze tonight 9 PM–noon (low 23°−5°)
Hard freeze tomorrow night from 8 PM (low 24°−4°)

This morningUp to 34°1° by 11 AM · freezing, low 24°−4° · Partly cloudy
This afternoonUp to 42°6° by 2 PM · Partly cloudy
TonightDown to 25°−4° by 5 AM · freezing, low 25°−4° · Mostly cloudy
Tomorrow morningUp to 32°0° by 11 AM · freezing, low 23°−5° · Partly cloudy
Tomorrow afternoonUp to 40°4° by 5 PM · Mostly cloudy
Tomorrow nightDown to 24°−4° by 5 AM · freezing, low 24°−4° · 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 6a	Fog	25°−4° (likely 25°−4° to 32°0°)	25°−4°	0%	2 mph3 km/h from W, gusts 3 mph5 km/h	96%	66%	0
Sat 7a	Cloudy	24°−4° (likely 24°−4° to 32°0°)	24°−4°	0%	1 mph2 km/h from W, gusts 2 mph2 km/h	99%	79%	0
Sat 8a	Partly sunny	25°−4° (likely 25°−4° to 31°−1°)	25°−4°	0%	2 mph3 km/h from WSW, gusts 5 mph9 km/h	99%	60%	0
Sat 9a	Sunny	27°−3° (likely 27°−3° to 32°0°)	27°−3°	0%	2 mph3 km/h from SSW, gusts 6 mph9 km/h	98%	34%	0
Sat 10a	Partly sunny	31°−1° (likely 30°−1° to 34°1°)	28°−2°	0%	3 mph5 km/h from S, gusts 8 mph13 km/h	83%	26%	1
Sat 11a	Mostly sunny	34°1° (likely 33°1° to 37°3°)	30°−1°	0%	5 mph8 km/h from SSE, gusts 11 mph18 km/h	77%	15%	1
Sat 12p	Mostly sunny	38°3° (likely 36°2° to 40°4°)	34°1°	0%	6 mph10 km/h from SE, gusts 12 mph19 km/h	71%	26%	2
Sat 1p	Mostly sunny	40°4° (likely 38°3° to 42°6°)	35°2°	0%	7 mph11 km/h from SE, gusts 10 mph16 km/h	64%	33%	2
Sat 2p	Sunny	42°6° (likely 40°4° to 44°7°)	37°3°	0%	7 mph11 km/h from SE, gusts 9 mph14 km/h	60%	10%	2
Sat 3p	Sunny	41°5° (likely 41°5° to 45°7°)	36°2°	0%	8 mph13 km/h from SE, gusts 9 mph14 km/h	56%	15%	2
Sat 4p	Mostly sunny	41°5° (likely 41°5° to 45°7°)	36°2°	0%	7 mph11 km/h from SE, gusts 9 mph15 km/h	55%	62%	1
Sat 5p	Partly sunny	42°6° (likely 41°5° to 45°7°)	38°3°	0%	7 mph11 km/h from ESE, gusts 9 mph15 km/h	58%	37%	0
Sat 6p	Cloudy	39°4° (likely 39°4° to 42°6°)	35°2°	0%	6 mph10 km/h from ESE, gusts 9 mph14 km/h	67%	84%	0
Sat 7p	Cloudy	37°3° (likely 37°3° to 40°4°)	32°0°	0%	6 mph10 km/h from E, gusts 10 mph16 km/h	74%	93%	0
Sat 8p	Cloudy	35°2° (likely 35°2° to 39°4°)	30°−1°	0%	6 mph10 km/h from E, gusts 12 mph19 km/h	78%	96%	0
Sat 9p	Cloudy	32°0° (likely 32°0° to 38°3°)	27°−3°	0%	5 mph8 km/h from E, gusts 12 mph19 km/h	80%	94%	0
Sat 10p	Cloudy	32°0° (likely 32°0° to 37°3°)	27°−3°	0%	5 mph8 km/h from E, gusts 12 mph19 km/h	80%	95%	0
Sat 11p	Cloudy	32°0° (likely 32°0° to 37°3°)	27°−3°	0%	5 mph8 km/h from ENE, gusts 10 mph15 km/h	80%	89%	0
Sun 12a	Cloudy	31°−1° (likely 31°−1° to 36°2°)	26°−3°	0%	5 mph8 km/h from NE, gusts 10 mph16 km/h	81%	77%	0
Sun 1a	Cloudy	30°−1° (likely 30°−1° to 35°2°)	25°−4°	0%	5 mph8 km/h from NNE, gusts 9 mph15 km/h	81%	71%	0
Sun 2a	Partly cloudy	29°−2° (likely 29°−2° to 33°1°)	24°−4°	0%	5 mph8 km/h from NNE, gusts 8 mph12 km/h	82%	65%	0
Sun 3a	Partly cloudy	28°−2° (likely 28°−2° to 32°0°)	23°−5°	0%	5 mph8 km/h from N, gusts 7 mph12 km/h	85%	38%	0
Sun 4a	Partly cloudy	27°−3° (likely 27°−3° to 31°−1°)	22°−6°	0%	5 mph8 km/h from N, gusts 7 mph11 km/h	87%	63%	0
Sun 5a	Partly cloudy	25°−4° (likely 25°−4° to 31°−1°)	21°−6°	0%	3 mph5 km/h from N, gusts 7 mph12 km/h	89%	75%	0
Sun 6a	Mostly cloudy	25°−4° (likely 25°−4° to 31°−1°)	21°−6°	0%	3 mph5 km/h from NE, gusts 9 mph14 km/h	90%	50%	0
Sun 7a	Clear	24°−4° (likely 24°−4° to 31°−1°)	20°−7°	0%	3 mph5 km/h from NE, gusts 9 mph14 km/h	91%	34%	0
Sun 8a	Cloudy	23°−5° (likely 23°−5° to 31°−1°)	18°−8°	0%	3 mph5 km/h from NE, gusts 11 mph18 km/h	92%	64%	0
Sun 9a	Mostly cloudy	25°−4° (likely 25°−4° to 31°−1°)	18°−8°	0%	6 mph10 km/h from E, gusts 13 mph21 km/h	91%	45%	0
Sun 10a	Mostly cloudy	29°−2° (likely 29°−2° to 31°−1°)	23°−5°	0%	6 mph10 km/h from E, gusts 14 mph22 km/h	85%	46%	1
Sun 11a	Mostly cloudy	32°0° (likely 31°−1° to 33°1°)	26°−3°	0%	6 mph10 km/h from E, gusts 14 mph22 km/h	79%	64%	2
Sun 12p	Cloudy	34°1° (likely 33°1° to 35°2°)	27°−3°	0%	9 mph14 km/h from E, gusts 12 mph20 km/h	73%	85%	3
Sun 1p	Cloudy	36°2° (likely 35°2° to 37°3°)	29°−2°	0%	9 mph14 km/h from E, gusts 12 mph19 km/h	65%	90%	3
Sun 2p	Cloudy	38°3° (likely 36°2° to 39°4°)	32°0°	0%	9 mph14 km/h from E, gusts 12 mph19 km/h	60%	79%	3
Sun 3p	Cloudy	39°4° (likely 36°2° to 40°4°)	33°1°	0%	9 mph14 km/h from E, gusts 11 mph18 km/h	55%	80%	3
Sun 4p	Cloudy	39°4° (likely 37°3° to 40°4°)	33°1°	0%	9 mph14 km/h from E, gusts 13 mph20 km/h	54%	79%	2
Sun 5p	Cloudy	40°4° (likely 37°3° to 40°4°)	34°1°	0%	9 mph14 km/h from E, gusts 12 mph20 km/h	56%	79%	1
Sun 6p	Cloudy	38°3° (likely 35°2° to 38°3°)	34°1°	0%	5 mph8 km/h from E, gusts 11 mph18 km/h	65%	88%	0
Sun 7p	Cloudy	34°1° (likely 34°1° to 36°2°)	30°−1°	0%	5 mph8 km/h from E, gusts 8 mph12 km/h	73%	89%	0
Sun 8p	Cloudy	32°0° (likely 32°0° to 35°2°)	27°−3°	0%	5 mph8 km/h from E, gusts 9 mph14 km/h	80%	87%	0
Sun 9p	Cloudy	30°−1° (likely 30°−1° to 34°1°)	25°−4°	0%	5 mph8 km/h from ENE, gusts 9 mph14 km/h	84%	88%	0
Sun 10p	Cloudy	29°−2° (likely 29°−2° to 32°0°)	24°−4°	0%	5 mph8 km/h from ENE, gusts 7 mph12 km/h	86%	87%	0
Sun 11p	Cloudy	28°−2° (likely 28°−2° to 32°0°)	23°−5°	0%	5 mph8 km/h from ENE, gusts 6 mph10 km/h	86%	82%	0
Mon 12a	Cloudy	28°−2° (likely 28°−2° to 31°−1°)	23°−5°	0%	5 mph8 km/h from E, gusts 5 mph9 km/h	86%	84%	0
Mon 1a	Mostly cloudy	27°−3° (likely 26°−3° to 31°−1°)	22°−6°	0%	5 mph8 km/h from E, gusts 6 mph9 km/h	87%	73%	0
Mon 2a	Mostly cloudy	27°−3° (likely 26°−3° to 31°−1°)	22°−6°	0%	5 mph8 km/h from E, gusts 7 mph11 km/h	88%	63%	0
Mon 3a	Mostly cloudy	26°−3° (likely 26°−3° to 31°−1°)	20°−7°	0%	5 mph8 km/h from E, gusts 7 mph11 km/h	89%	75%	0
Mon 4a	Mostly cloudy	25°−4° (likely 25°−4° to 31°−1°)	19°−7°	0%	5 mph8 km/h from E, gusts 7 mph11 km/h	91%	59%	0
Mon 5a	Mostly cloudy	24°−4° (likely 24°−4° to 30°−1°)	18°−8°	0%	5 mph8 km/h from E, gusts 6 mph9 km/h	94%	55%	0

Days ahead

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

Today, Oct 24. Cloudy. High 42°6°, low 23°−5°. Typical 52°11° / 25°−4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 25°−4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 42°6°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 35°2°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 25°−4°
  Dry
Official NWS forecast
Today: Areas of fog before 10am. Mostly sunny, with a high near 42. South wind 1 to 8 mph.
Tonight: Mostly cloudy, with a low around 23. Northeast wind around 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
42°6°–46°8°
Low, likely
23°−5°–30°−1°
Typical high / low
52°11° / 25°−4°
Wind
12 mph19 km/h, gusts 21 mph34 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 40°4°, low 23°−5°. Typical 51°11° / 25°−4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly cloudy, 23°−5°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 40°4°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 32°0°
  Dry
4. Overnight
  midnight–6 AM
  Mostly cloudy, 24°−4°
  Dry
Official NWS forecast
Day: Mostly cloudy, with a high near 40. East northeast wind 3 to 9 mph, with gusts as high as 18 mph.
Night: Mostly cloudy, with a low around 23. East wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
37°3°–40°4°
Low, likely
23°−5°–31°−1°
Typical high / low
51°11° / 25°−4°
Wind
13 mph20 km/h, gusts 20 mph33 km/h
UV peak
3
Monday, Oct 26. Cloudy. High 42°6°, low 27°−3°. Typical 51°11° / 24°−4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 27°−3°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 42°6°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 36°2°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 33°0°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 42. East southeast wind 3 to 9 mph.
Night: Mostly cloudy, with a low around 27. Southeast wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
41°5°–43°6°
Low, likely
25°−4°–29°−2°
Typical high / low
51°11° / 24°−4°
Wind
13 mph20 km/h, gusts 21 mph33 km/h
UV peak
3
Tuesday, Oct 27. Drizzle. High 47°8°, low 27°−3°. Typical 50°10° / 24°−4°. Rain 0.05 in1.3 mm, 5% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 33°0°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 48°9°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 42°6°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 33°1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 47. Southwest wind 2 to 13 mph, with gusts as high as 22 mph.
Night: A slight chance of rain before 9pm, then a slight chance of rain and snow between 9pm and midnight. Mostly cloudy, with a low around 27. West northwest wind around 13 mph, with gusts as high as 21 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
44°7°–51°11°
Low, likely
27°−3°–34°1°
Typical high / low
50°10° / 24°−4°
Wind
20 mph32 km/h, gusts 37 mph59 km/h
UV peak
3
Wednesday, Oct 28. Snow. High 41°5°, low 22°−6°. Typical 50°10° / 24°−4°. Snow 0.03 in0.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 31°0°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 44°7°
  Dry
3. Evening
  6 PM–midnight
  Clear, 35°2°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 29°−1°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of snow before noon. Partly sunny, with a high near 41.
Night: A chance of snow. Mostly cloudy, with a low around 22.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
37°3°–51°11°
Low, likely
22°−6°–33°1°
Typical high / low
50°10° / 24°−4°
Wind
12 mph19 km/h, gusts 33 mph53 km/h
UV peak
3
Thursday, Oct 29. Snow. High 38°3°, low 21°−6°. Typical 49°9° / 23°−5°. Snow 0.02 in0.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 28°−2°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 34°1°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 31°−1°
  20% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Snow, 29°−2°
  30% chance · 0.3 in0.9 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow before noon. Mostly cloudy, with a high near 38.
Night: A chance of snow. Mostly cloudy, with a low around 21. New snow accumulation of less than half an inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
31°−1°–39°4°
Low, likely
21°−6°–29°−2°
Typical high / low
49°9° / 23°−5°
Wind
14 mph23 km/h, gusts 22 mph36 km/h
UV peak
2
Friday, Oct 30. Snow. High 41°5°, low 22°−6°. Typical 49°9° / 23°−5°. Snow 0–4 in0–10 cm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Snow, 29°−2°
  20% chance · 0.5 in1.3 cm
2. Afternoon
  noon–6 PM
  Cloudy, 34°1°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 30°−1°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 25°−4°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of snow before noon. Partly sunny, with a high near 41. Little or no snow accumulation expected.
Night: Partly cloudy, with a low around 22.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
28°−2°–43°6°
Low, likely
19°−7°–33°1°
Typical high / low
49°9° / 23°−5°
Wind
11 mph18 km/h, gusts 18 mph28 km/h
UV peak
2
Saturday, Oct 31. Partly sunny. High 36°2°, low 24°−4°. Typical 48°9° / 22°−6°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 24°−4°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 35°2°
  Dry
3. Evening
  6 PM–midnight
  Clear, 29°−2°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 25°−4°
  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
31°−1°–44°7°
Low, likely
14°−10°–33°1°
Typical high / low
48°9° / 22°−6°
Wind
20 mph32 km/h, gusts 28 mph45 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 41°5°, low 24°−4°. Typical 48°9° / 22°−6°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 27°−3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 39°4°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 34°1°
  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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
32°0°–50°10°
Low, likely
13°−11°–32°0°
Typical high / low
48°9° / 22°−6°
Wind
20 mph32 km/h, gusts 30 mph48 km/h
UV peak
3
Monday, Nov 2. Partly sunny. High 43°6°, low 28°−2°. Typical 48°9° / 22°−6°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 45°7°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 35°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
31°−1°–53°12°
Low, likely
18°−8°–35°2°
Typical high / low
48°9° / 22°−6°
Wind
11 mph18 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 42°, low 23°.
Tomorrow
Dry, high 40°, low 23°.
Monday
Dry, high 42°, low 27°.
Rest of week
Mostly dry, highs 36–47°.

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

Marias River near Shelby

5.3 mi

Below flood stage

Level: 2.9 ft
Flow: 431 cfs

Reading from Sat 4:30 AM · NWS gauge page

Cut Bank Creek at Cut Bank

24 mi

Level: 1.9 ft
Flow: 117 cfs

Reading from Sat 4:30 AM · NWS gauge page

For your home

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

Heating this week

About 67% less heating than a typical week.

This week 65Typical 195

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 14 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 25°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?

Shelby · official normals 1991–2020 · records 1950–2026

Oct 24, today vs a typical year

Today’s expected high is 10°6° colder than typical.

Last 7 days vs normal

On average 11°6° warmer than normal (daily mean temperature).

+13°+7°SunOct 18
+4°+2°MonOct 19
+8°+4°TueOct 20
+14°+8°WedOct 21
+17°+9°ThuOct 22
—FriOct 23
—SatOct 24

Shelby weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 20 min; Losing 3 min 17 s a day; shortest Dec 21, 2 h 2 min less
Golden hour: 5:36–6:40 PM; Morning 7:41–8:45 AM
Blue hour: 6:40–6:53 PM; Morning 7:29–7:41 AM; first light 7:29 AM

Stars tonight? Poor

Clouds most of the night (about 72% cover).

Moon

Waxing gibbous

96% lit · growing

Today: sets 6:14 AM · rises 5:22 PM
Full moon: Oct 25
New moon: Nov 9

Looking southwest from Shelby. The highest point on the skyline is about 9,800 ft, 79 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.