Model estimate for 11:00 AM MDT (no recent station report)

Bynum, MT weather

Mostly sunny and 33°1°, 12°7° colder than usual, freeze watch tonight, low 25°−4°.

Mostly agree

Now 33°1°

Mostly sunny · Feels like 30°−1°

Wind: 3 mph5 km/h; From the south-southeast. Up to 5 mph8 km/h through 11 PM
Dew point: 27°−3°; Dry, static shocks likely
UV index: 1Low; Moderate 1–2 PM · peak 3
Air quality: 13Good; Main pollutant: PM2.5 (fine particles)

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 42°6° today at 2 PM
Hard freeze tonight 8–1 PM (low 23°−5°)
Low 23°−5° tomorrow at 8 AM
Hard freeze tomorrow night from 7 PM (low 23°−5°)

This afternoonUp to 42°6° by 2 PM · Partly cloudy
TonightDown to 25°−4° by 4 AM · freezing, low 25°−4° · Mostly cloudy
Tomorrow morningUp to 31°−1° by 11 AM · freezing, low 23°−5° · Mostly cloudy
Tomorrow afternoonUp to 37°3° by 5 PM · freezing, low 32°0° · Cloudy
Tomorrow nightDown to 23°−5° by 5 AM · freezing, low 23°−5° · Cloudy
Monday morningUp to 29°−2° by 10 AM · freezing, low 23°−5° · 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 11a	Mostly sunny	33°1° (likely 29°−2° to 37°3°)	30°−1°	0%	3 mph5 km/h from SSE, gusts 7 mph12 km/h	79%	24%	1
Sat 12p	Mostly sunny	38°3° (likely 31°−1° to 40°4°)	34°1°	0%	5 mph8 km/h from SSE, gusts 8 mph12 km/h	73%	55%	2
Sat 1p	Cloudy	41°5° (likely 36°2° to 43°6°)	38°3°	0%	5 mph8 km/h from SE, gusts 8 mph13 km/h	71%	62%	3
Sat 2p	Sunny	42°6° (likely 41°5° to 45°7°)	39°4°	0%	5 mph8 km/h from SE, gusts 7 mph11 km/h	68%	17%	2
Sat 3p	Mostly sunny	42°6° (likely 42°6° to 47°8°)	39°4°	0%	5 mph8 km/h from ESE, gusts 6 mph9 km/h	67%	17%	2
Sat 4p	Partly sunny	41°5° (likely 41°5° to 46°8°)	38°3°	0%	5 mph8 km/h from ESE, gusts 7 mph10 km/h	65%	32%	1
Sat 5p	Sunny	41°5° (likely 41°5° to 45°7°)	38°3°	0%	5 mph8 km/h from E, gusts 7 mph12 km/h	67%	16%	1
Sat 6p	Mostly cloudy	38°3° (likely 38°3° to 43°6°)	36°2°	0%	3 mph5 km/h from ENE, gusts 7 mph12 km/h	77%	53%	0
Sat 7p	Mostly cloudy	33°1° (likely 33°1° to 40°4°)	33°1°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	88%	67%	0
Sat 8p	Cloudy	31°−1° (likely 31°−1° to 38°3°)	31°−1°	0%	2 mph3 km/h from ENE, gusts 4 mph6 km/h	92%	83%	0
Sat 9p	Cloudy	30°−1° (likely 30°−1° to 36°2°)	30°−1°	0%	2 mph3 km/h from NE, gusts 6 mph10 km/h	92%	85%	0
Sat 10p	Cloudy	29°−2° (likely 29°−2° to 35°2°)	29°−2°	0%	2 mph3 km/h from NNE, gusts 5 mph8 km/h	93%	85%	0
Sat 11p	Cloudy	28°−2° (likely 28°−2° to 35°2°)	28°−2°	0%	2 mph3 km/h from NE, gusts 6 mph9 km/h	92%	92%	0
Sun 12a	Cloudy	27°−3° (likely 27°−3° to 34°1°)	27°−3°	0%	2 mph3 km/h from NNE, gusts 6 mph9 km/h	94%	88%	0
Sun 1a	Cloudy	26°−3° (likely 26°−3° to 33°1°)	26°−3°	0%	3 mph5 km/h from N, gusts 9 mph14 km/h	100%	90%	0
Sun 2a	Partly cloudy	26°−3° (likely 26°−3° to 33°1°)	26°−3°	0%	3 mph5 km/h from N, gusts 10 mph16 km/h	100%	72%	0
Sun 3a	Partly cloudy	26°−3° (likely 26°−3° to 32°0°)	26°−3°	0%	3 mph5 km/h from N, gusts 10 mph17 km/h	100%	55%	0
Sun 4a	Clear	25°−4° (likely 25°−4° to 32°0°)	21°−6°	0%	5 mph8 km/h from N, gusts 11 mph18 km/h	98%	34%	0
Sun 5a	Clear	25°−4° (likely 25°−4° to 32°0°)	21°−6°	0%	5 mph8 km/h from N, gusts 10 mph16 km/h	98%	30%	0
Sun 6a	Mostly clear	25°−4° (likely 25°−4° to 31°−1°)	21°−6°	0%	5 mph8 km/h from N, gusts 9 mph15 km/h	96%	37%	0
Sun 7a	Cloudy	24°−4° (likely 24°−4° to 31°−1°)	20°−7°	0%	5 mph8 km/h from N, gusts 8 mph14 km/h	96%	68%	0
Sun 8a	Cloudy	23°−5° (likely 23°−5° to 30°−1°)	18°−8°	0%	3 mph5 km/h from N, gusts 10 mph16 km/h	95%	72%	0
Sun 9a	Cloudy	25°−4° (likely 25°−4° to 30°−1°)	21°−6°	0%	5 mph8 km/h from N, gusts 10 mph17 km/h	91%	71%	0
Sun 10a	Cloudy	29°−2° (likely 29°−2° to 30°−1°)	25°−4°	0%	5 mph8 km/h from NNE, gusts 10 mph16 km/h	84%	73%	1
Sun 11a	Cloudy	31°−1° (likely 30°−1° to 31°−1°)	28°−2°	0%	5 mph8 km/h from NNE, gusts 10 mph16 km/h	77%	80%	2
Sun 12p	Cloudy	32°0° (likely 31°−1° to 33°1°)	27°−3°	0%	5 mph8 km/h from NE, gusts 9 mph14 km/h	72%	87%	3
Sun 1p	Cloudy	34°1° (likely 31°−1° to 35°2°)	30°−1°	0%	5 mph8 km/h from NE, gusts 8 mph13 km/h	68%	87%	3
Sun 2p	Cloudy	35°2° (likely 32°0° to 36°2°)	31°−1°	0%	6 mph10 km/h from ENE, gusts 8 mph12 km/h	65%	87%	3
Sun 3p	Cloudy	36°2° (likely 32°0° to 37°3°)	32°0°	0%	6 mph10 km/h from ENE, gusts 9 mph14 km/h	66%	87%	3
Sun 4p	Cloudy	36°2° (likely 33°1° to 37°3°)	32°0°	0%	6 mph10 km/h from ENE, gusts 8 mph13 km/h	61%	89%	2
Sun 5p	Cloudy	37°3° (likely 33°1° to 37°3°)	33°1°	0%	6 mph10 km/h from E, gusts 8 mph13 km/h	63%	89%	1
Sun 6p	Cloudy	34°1° (likely 32°0° to 36°2°)	34°1°	0%	2 mph3 km/h from E, gusts 8 mph14 km/h	71%	89%	0
Sun 7p	Cloudy	31°−1° (likely 31°−1° to 34°1°)	31°−1°	0%	2 mph3 km/h from E, gusts 9 mph14 km/h	82%	91%	0
Sun 8p	Cloudy	29°−2° (likely 29°−2° to 34°1°)	29°−2°	0%	2 mph3 km/h from E, gusts 8 mph13 km/h	87%	94%	0
Sun 9p	Cloudy	27°−3° (likely 27°−3° to 34°1°)	27°−3°	0%	0 mph0 km/h, gusts 6 mph9 km/h	88%	94%	0
Sun 10p	Cloudy	26°−3° (likely 26°−3° to 34°1°)	26°−3°	0%	0 mph0 km/h, gusts 5 mph8 km/h	90%	96%	0
Sun 11p	Cloudy	25°−4° (likely 25°−4° to 34°1°)	25°−4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	92%	96%	0
Mon 12a	Cloudy	25°−4° (likely 25°−4° to 34°1°)	25°−4°	0%	1 mph2 km/h from N, gusts 4 mph7 km/h	94%	97%	0
Mon 1a	Cloudy	25°−4° (likely 25°−4° to 32°0°)	25°−4°	0%	1 mph2 km/h from N, gusts 4 mph7 km/h	96%	97%	0
Mon 2a	Cloudy	25°−4° (likely 25°−4° to 32°0°)	25°−4°	0%	1 mph2 km/h from N, gusts 4 mph6 km/h	98%	97%	0
Mon 3a	Cloudy	24°−4° (likely 24°−4° to 31°−1°)	24°−4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	97%	0
Mon 4a	Cloudy	24°−4° (likely 24°−4° to 31°−1°)	24°−4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	89%	0
Mon 5a	Cloudy	23°−5° (likely 23°−5° to 30°−1°)	23°−5°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	83%	0
Mon 6a	Cloudy	23°−5° (likely 23°−5° to 30°−1°)	23°−5°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	76%	0
Mon 7a	Mostly cloudy	23°−5° (likely 19°−7° to 30°−1°)	23°−5°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	64%	0
Mon 8a	Partly sunny	24°−4° (likely 19°−7° to 30°−1°)	24°−4°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	68%	0
Mon 9a	Cloudy	26°−3° (likely 21°−6° to 31°−1°)	26°−3°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	97%	83%	0
Mon 10a	Cloudy	29°−2° (likely 27°−3° to 33°1°)	29°−2°	0%	1 mph2 km/h from SE, gusts 5 mph7 km/h	90%	90%	1

Days ahead

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

Today, Oct 24. Cloudy. High 42°6°, low 23°−5°. Typical 54°12° / 28°−2°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Mostly sunny, 42°6°
  Dry
2. Evening
  6 PM–midnight
  Cloudy, 31°−1°
  Dry
3. Overnight
  midnight–6 AM
  Partly cloudy, 25°−4°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 42. Southeast wind around 5 mph.
Tonight: Patchy fog after 1am. Mostly cloudy, with a low around 23. Northeast wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
42°6°–47°8°
Low, likely
23°−5°–28°−2°
Typical high / low
54°12° / 28°−2°
Wind
9 mph14 km/h, gusts 14 mph23 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 37°3°, low 22°−6°. Typical 54°12° / 27°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 23°−5°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 37°3°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 29°−2°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 23°−5°
  Dry
Official NWS forecast
Day: Patchy fog before 10am. Partly sunny, with a high near 37. Northeast wind around 6 mph.
Night: Mostly cloudy, with a low around 22. Northeast wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
33°1°–37°3°
Low, likely
22°−6°–30°−1°
Typical high / low
54°12° / 27°−3°
Wind
9 mph15 km/h, gusts 16 mph26 km/h
UV peak
3
Monday, Oct 26. Mostly cloudy. High 42°6°, low 27°−3°. Typical 53°12° / 27°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 24°−4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 41°5°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 33°1°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 33°0°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 42. East southeast wind 0 to 6 mph.
Night: Mostly cloudy, with a low around 27. South southwest wind 0 to 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
39°4°–42°6°
Low, likely
22°−6°–30°−1°
Typical high / low
53°12° / 27°−3°
Wind
8 mph13 km/h, gusts 13 mph21 km/h
UV peak
3
Tuesday, Oct 27. Drizzle. High 48°9°, low 27°−3°. Typical 53°12° / 27°−3°. Rain 0.03 in0.8 mm, 5% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 35°2°
  30% chance · 0.02 in0.4 mm
2. Afternoon
  noon–6 PM
  Cloudy, 48°9°
  20% chance
3. Evening
  6 PM–midnight
  Drizzle, 41°5°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 33°1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 48. West wind 1 to 8 mph.
Night: A chance of rain before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 27. West northwest wind 5 to 9 mph, with gusts as high as 20 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
47°8°–50°10°
Low, likely
27°−3°–34°1°
Typical high / low
53°12° / 27°−3°
Wind
15 mph25 km/h, gusts 31 mph50 km/h
UV peak
3
Wednesday, Oct 28. Snow. High 42°6°, low 22°−6°. Typical 52°11° / 26°−3°. Snow 0.01 in0.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 46°8°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 37°3°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 29°−1°
  30% chance · 0.01 in0.3 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow. Partly sunny, with a high near 42.
Night: A chance of snow. Mostly cloudy, with a low around 22. Little or no snow accumulation expected.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
42°6°–49°9°
Low, likely
22°−6°–34°1°
Typical high / low
52°11° / 26°−3°
Wind
19 mph30 km/h, gusts 34 mph55 km/h
UV peak
3
Thursday, Oct 29. Snow. High 38°3°, low 22°−6°. Typical 52°11° / 26°−3°. Snow < 1 in< 2 cm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 28°−2°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 32°0°
  Dry
3. Evening
  6 PM–midnight
  Snow, 29°−2°
  30% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Snow, 25°−4°
  40% chance · 0.4 in1.1 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 22.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
29°−2°–38°3°
Low, likely
22°−6°–29°−2°
Typical high / low
52°11° / 26°−3°
Wind
12 mph19 km/h
UV peak
2
Friday, Oct 30. Snow. High 42°6°, low 24°−4°. Typical 51°11° / 26°−3°. Snow 0–2 in0–5 cm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Snow, 25°−4°
  30% chance · 0.4 in1 cm
2. Afternoon
  noon–6 PM
  Snow, 29°−2°
  30% chance · 0.3 in0.7 cm
3. Evening
  6 PM–midnight
  Cloudy, 26°−4°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 23°−5°
  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. Little or no snow accumulation expected.
Night: A slight chance of snow. Partly cloudy, with a low around 24.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
28°−2°–42°6°
Low, likely
19°−7°–27°−3°
Typical high / low
51°11° / 26°−3°
Wind
11 mph18 km/h, gusts 22 mph35 km/h
UV peak
2
Saturday, Oct 31. Cloudy. High 35°2°, low 23°−5°. Typical 51°11° / 26°−3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 23°−5°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 33°0°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 29°−2°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 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
29°−2°–39°4°
Low, likely
17°−8°–30°−1°
Typical high / low
51°11° / 26°−3°
Wind
30 mph48 km/h, gusts 44 mph70 km/h
UV peak
2
Sunday, Nov 1. Cloudy. High 41°5°, low 25°−4°. Typical 50°10° / 25°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 27°−3°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 40°4°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 34°1°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 33°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°–49°9°
Low, likely
17°−8°–30°−1°
Typical high / low
50°10° / 25°−4°
Wind
20 mph33 km/h, gusts 41 mph66 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 44°7°, low 30°−1°. Typical 50°10° / 25°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 46°8°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 37°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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
35°2°–50°10°
Low, likely
23°−5°–34°1°
Typical high / low
50°10° / 25°−4°
Wind
9 mph14 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 42°, low 23°.
Tomorrow
Dry, high 37°, low 22°, cooling off.
Monday
Dry, high 42°, low 27°, warming up.
Rest of week
Mostly dry, highs 35–48°.

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

Teton River near Choteau below South Fork

15 mi

Below flood stage

Level: 4.3 ft

Reading from Sat 9:45 AM · NWS gauge page

For your home

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

Pipes: watch the cold

Tonight’s low: 25°−4°

Overnight low near 25°F — not yet at drip-the-faucets cold, but worth watching if it's forecast to drop further.

Heating this week

About 61% less heating than a typical week.

This week 69Typical 177

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

Comfort

Dry air outside (dew point 27°F).

Open the windows?

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

Is this typical?

Choteau · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is 12°7° colder than typical.

Last 7 days vs normal

On average 7°4° warmer than normal (daily mean temperature).

+4°+2°SunOct 18
+8°+4°MonOct 19
+2°+1°TueOct 20
+10°+6°WedOct 21
+13°+7°ThuOct 22
+8°+4°FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 22 min; Losing 3 min 12 s a day; shortest Dec 21, 1 h 59 min less
Golden hour: 5:40–6:43 PM; Morning 7:42–8:46 AM
Blue hour: 6:43–6:55 PM; Morning 7:30–7:42 AM; first light 7:30 AM

Stars tonight? Poor

Clouds most of the night (about 67% cover).

Moon

Waxing gibbous

97% lit · growing

Today: sets 6:15 AM · rises 5:25 PM
Full moon: Oct 25
New moon: Nov 9

Looking west from Bynum. The highest point on the skyline is about 9,300 ft, 25 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.