Model estimate for 3:00 PM MDT (no recent station report)

Big Arm, MT weather

Sunny and 49°9°.

Forecasts agree

Now 49°9°

Sunny

Wind: 5 mph8 km/h; From the south. Up to 5 mph8 km/h through 3 AM
Dew point: 38°3°; Comfortable
UV tomorrow: 3Moderate; Moderate 1–4 PM · peak 3

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 51°11° today at 5 PM
Low 36°2° tomorrow at 7 AM
Above 40°4° tomorrow by 10 AM

This afternoonNear 50°10° · Clear
TonightDown to 37°3° by 5 AM · Mostly cloudy
Tomorrow morningUp to 44°7° by 10 AM · Partly cloudy
Tomorrow afternoonUp to 51°11° by 5 PM · Mostly cloudy
Tomorrow nightDown to 35°2° by 5 AM · Mostly cloudy
Monday morningUp to 41°5° by 11 AM · Mostly cloudy
Monday afternoonNear 46°8° · 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 3p	Sunny	49°9° (likely 47°8° to 49°9°)	47°8°	0%	5 mph8 km/h from S, gusts 9 mph14 km/h	65%	2%	2
Sat 4p	Sunny	50°10° (likely 48°9° to 50°10°)	49°9°	0%	3 mph5 km/h from S, gusts 8 mph13 km/h	64%	11%	1
Sat 5p	Mostly sunny	51°11° (likely 47°8° to 51°11°)	51°11°	0%	2 mph3 km/h from S, gusts 7 mph12 km/h	64%	18%	0
Sat 6p	Mostly cloudy	49°9° (likely 45°7° to 49°9°)	49°9°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	64%	33%	1
Sat 7p	Mostly clear	45°7° (likely 43°6° to 45°7°)	45°7°	0%	0 mph0 km/h, gusts 5 mph8 km/h	75%	44%	0
Sat 8p	Cloudy	43°6° (likely 43°6° to 44°7°)	43°6°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	78%	74%	0
Sat 9p	Mostly cloudy	41°5° (likely 41°5° to 43°6°)	41°5°	0%	1 mph2 km/h from NW, gusts 4 mph7 km/h	75%	71%	0
Sat 10p	Cloudy	42°6° (likely 41°5° to 43°6°)	42°6°	0%	1 mph2 km/h from NW, gusts 4 mph7 km/h	73%	73%	0
Sat 11p	Mostly cloudy	42°6° (likely 41°5° to 43°6°)	42°6°	0%	1 mph2 km/h from NW, gusts 4 mph7 km/h	73%	63%	0
Sun 12a	Partly cloudy	42°6° (likely 41°5° to 44°7°)	42°6°	0%	1 mph2 km/h from NW, gusts 5 mph8 km/h	74%	79%	0
Sun 1a	Partly cloudy	42°6° (likely 40°4° to 43°6°)	42°6°	0%	1 mph2 km/h from NW, gusts 5 mph7 km/h	77%	71%	0
Sun 2a	Partly cloudy	41°5° (likely 39°4° to 42°6°)	41°5°	0%	2 mph3 km/h from NE, gusts 5 mph8 km/h	79%	66%	0
Sun 3a	Partly cloudy	40°4° (likely 38°3° to 41°5°)	40°4°	0%	2 mph3 km/h from NW, gusts 5 mph9 km/h	82%	56%	0
Sun 4a	Mostly cloudy	39°4° (likely 37°3° to 41°5°)	37°3°	0%	3 mph5 km/h from NNW, gusts 6 mph10 km/h	82%	57%	0
Sun 5a	Partly cloudy	37°3° (likely 37°3° to 41°5°)	34°1°	0%	3 mph5 km/h from N, gusts 7 mph11 km/h	86%	60%	0
Sun 6a	Partly cloudy	37°3° (likely 35°2° to 41°5°)	33°1°	0%	5 mph8 km/h from NNW, gusts 8 mph12 km/h	86%	37%	0
Sun 7a	Mostly cloudy	36°2° (likely 35°2° to 41°5°)	32°0°	0%	5 mph8 km/h from N, gusts 8 mph13 km/h	87%	54%	0
Sun 8a	Sunny	36°2° (likely 35°2° to 40°4°)	33°1°	0%	3 mph5 km/h from N, gusts 9 mph15 km/h	87%	19%	0
Sun 9a	Mostly cloudy	37°3° (likely 36°2° to 40°4°)	33°1°	0%	5 mph8 km/h from N, gusts 9 mph15 km/h	87%	67%	0
Sun 10a	Mostly cloudy	44°7° (likely 39°4° to 44°7°)	42°6°	0%	3 mph5 km/h from N, gusts 11 mph17 km/h	72%	53%	1
Sun 11a	Cloudy	44°7° (likely 41°5° to 46°8°)	41°5°	0%	5 mph8 km/h from N, gusts 11 mph18 km/h	74%	66%	2
Sun 12p	Cloudy	45°7° (likely 43°6° to 49°9°)	43°6°	0%	5 mph8 km/h from NNE, gusts 11 mph17 km/h	72%	66%	2
Sun 1p	Cloudy	45°7° (likely 44°7° to 51°11°)	43°6°	0%	5 mph8 km/h from NNE, gusts 10 mph17 km/h	72%	67%	3
Sun 2p	Cloudy	47°8° (likely 46°8° to 54°12°)	45°7°	0%	5 mph8 km/h from NNE, gusts 11 mph18 km/h	67%	70%	3
Sun 3p	Cloudy	49°9° (likely 47°8° to 55°13°)	47°8°	0%	5 mph8 km/h from NE, gusts 11 mph17 km/h	63%	73%	3
Sun 4p	Cloudy	49°9° (likely 48°9° to 56°13°)	47°8°	0%	5 mph8 km/h from NE, gusts 10 mph16 km/h	60%	73%	2
Sun 5p	Partly sunny	51°11° (likely 47°8° to 55°13°)	51°11°	0%	3 mph5 km/h from NNE, gusts 9 mph14 km/h	57%	68%	1
Sun 6p	Mostly cloudy	49°9° (likely 46°8° to 51°11°)	49°9°	0%	2 mph3 km/h from NNE, gusts 7 mph11 km/h	61%	68%	0
Sun 7p	Cloudy	45°7° (likely 43°6° to 48°9°)	45°7°	0%	2 mph3 km/h from NNE, gusts 7 mph12 km/h	74%	72%	0
Sun 8p	Cloudy	42°6° (likely 41°5° to 48°9°)	42°6°	0%	2 mph3 km/h from NNE, gusts 6 mph10 km/h	80%	76%	0
Sun 9p	Cloudy	39°4° (likely 39°4° to 48°9°)	36°2°	0%	5 mph8 km/h from NNE, gusts 6 mph10 km/h	78%	72%	0
Sun 10p	Cloudy	40°4° (likely 39°4° to 47°8°)	37°3°	0%	5 mph8 km/h from NNE, gusts 5 mph9 km/h	75%	79%	0
Sun 11p	Cloudy	40°4° (likely 38°3° to 45°7°)	37°3°	0%	5 mph8 km/h from NNE, gusts 5 mph8 km/h	73%	80%	0
Mon 12a	Cloudy	39°4° (likely 37°3° to 44°7°)	37°3°	0%	3 mph5 km/h from N, gusts 6 mph10 km/h	74%	80%	0
Mon 1a	Cloudy	38°3° (likely 37°3° to 44°7°)	36°2°	0%	3 mph5 km/h from N, gusts 7 mph11 km/h	76%	79%	0
Mon 2a	Cloudy	38°3° (likely 36°2° to 43°6°)	36°2°	0%	3 mph5 km/h from N, gusts 7 mph11 km/h	77%	79%	0
Mon 3a	Mostly cloudy	36°2° (likely 35°2° to 43°6°)	36°2°	0%	1 mph2 km/h from N, gusts 6 mph10 km/h	79%	48%	0
Mon 4a	Clear	36°2° (likely 34°1° to 43°6°)	36°2°	0%	1 mph2 km/h from N, gusts 5 mph9 km/h	78%	41%	0
Mon 5a	Clear	35°2° (likely 34°1° to 44°7°)	35°2°	0%	1 mph2 km/h from N, gusts 5 mph7 km/h	83%	42%	0
Mon 6a	Cloudy	35°2° (likely 34°1° to 43°6°)	35°2°	0%	1 mph2 km/h from N, gusts 4 mph7 km/h	83%	48%	0
Mon 7a	Cloudy	34°1° (likely 34°1° to 42°6°)	34°1°	0%	1 mph2 km/h from N, gusts 5 mph7 km/h	85%	55%	0
Mon 8a	Cloudy	34°1° (likely 34°1° to 42°6°)	34°1°	0%	1 mph2 km/h from N, gusts 3 mph5 km/h	86%	76%	0
Mon 9a	Mostly sunny	36°2° (likely 35°2° to 42°6°)	36°2°	0%	1 mph2 km/h from N, gusts 3 mph4 km/h	85%	54%	0
Mon 10a	Cloudy	38°3° (likely 38°3° to 43°6°)	38°3°	0%	1 mph2 km/h from N, gusts 3 mph5 km/h	82%	85%	1
Mon 11a	Cloudy	41°5° (likely 40°4° to 47°8°)	41°5°	0%	1 mph2 km/h from N, gusts 4 mph6 km/h	77%	88%	1
Mon 12p	Cloudy	44°7° (likely 41°5° to 49°9°)	44°7°	5%	1 mph2 km/h from N, gusts 5 mph8 km/h	73%	91%	2
Mon 1p	Cloudy	46°8° (likely 41°5° to 46°8°)	46°8°	5%	1 mph2 km/h from N, gusts 4 mph6 km/h	71%	91%	3
Mon 2p	Cloudy	47°8° (likely 42°6° to 47°8°)	47°8°	5%	1 mph2 km/h from N, gusts 4 mph6 km/h	70%	95%	3

Days ahead

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

Today, Oct 24. Cloudy. High 52°11°, low 36°2°. Typical 51°11° / 36°2°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Sunny, 51°11°
  Dry
2. Evening
  6 PM–midnight
  Mostly cloudy, 43°6°
  Dry
3. Overnight
  midnight–6 AM
  Partly cloudy, 37°3°
  Dry
Official NWS forecast
Today: Partly sunny, with a high near 52. South wind around 5 mph.
Tonight: Mostly cloudy, with a low around 36. North northwest wind 0 to 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
48°9°–52°11°
Low, likely
33°1°–36°2°
Typical high / low
51°11° / 36°2°
Wind
9 mph15 km/h, gusts 17 mph28 km/h
UV peak
3
Tomorrow, Oct 25. Cloudy. High 51°11°, low 34°1°. Typical 50°10° / 36°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly cloudy, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 51°11°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 42°6°
  Dry
4. Overnight
  midnight–6 AM
  Mostly cloudy, 35°2°
  Dry
Official NWS forecast
Day: Partly sunny, with a high near 51. North northeast wind around 5 mph.
Night: Mostly cloudy, with a low around 34. North northeast wind 1 to 5 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
48°9°–56°13°
Low, likely
34°1°–40°4°
Typical high / low
50°10° / 36°2°
Wind
12 mph19 km/h, gusts 24 mph38 km/h
UV peak
3
Monday, Oct 26. Mostly cloudy. High 51°11°, low 36°2°. Typical 50°10° / 36°2°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Mostly sunny, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 47°8°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 39°4°
  50% chance · 0.03 in0.7 mm
4. Overnight
  midnight–6 AM
  Drizzle, 37°3°
  60% chance · 0.12 in3.1 mm
Official NWS forecast
Day: Partly sunny, with a high near 51. North wind around 2 mph.
Night: Rain likely. Mostly cloudy, with a low around 36. Chance of precipitation is 70%.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
45°7°–51°11°
Low, likely
33°1°–38°3°
Typical high / low
50°10° / 36°2°
Wind
8 mph13 km/h, gusts 17 mph28 km/h
UV peak
3
Tuesday, Oct 27. Rain. High 47°8°, low 35°2°. Typical 49°9° / 35°2°. Rain 0.27 in6.9 mm, 70% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 36°2°
  60% chance · 0.05 in1.2 mm
2. Afternoon
  noon–6 PM
  Drizzle, 42°5°
  50% chance · 0.08 in1.9 mm
3. Evening
  6 PM–midnight
  Drizzle, 40°4°
  40% chance · 0.04 in1.1 mm
4. Overnight
  midnight–6 AM
  Cloudy, 36°2°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain likely. Mostly cloudy, with a high near 47. New rainfall amounts less than a tenth of an inch possible.
Night: A chance of rain. Mostly cloudy, with a low around 35.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
39°4°–47°8°
Low, likely
33°1°–38°3°
Typical high / low
49°9° / 35°2°
Wind
14 mph23 km/h, gusts 26 mph42 km/h
Wednesday, Oct 28. Rain. High 48°9°, low 33°1°. Typical 49°9° / 35°2°. Rain 0.07 in1.8 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 34°1°
  30% chance
2. Afternoon
  noon–6 PM
  Sunny, 45°7°
  30% chance · 0.02 in0.4 mm
3. Evening
  6 PM–midnight
  Clear, 40°4°
  40% chance · 0.02 in0.6 mm
4. Overnight
  midnight–6 AM
  Drizzle, 36°2°
  40% chance · 0.04 in0.9 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Mostly cloudy, with a high near 48.
Night: A chance of rain before 3am, then a chance of rain and snow. Mostly cloudy, with a low around 33.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
44°7°–48°9°
Low, likely
32°0°–37°3°
Typical high / low
49°9° / 35°2°
Wind
16 mph25 km/h, gusts 30 mph49 km/h
UV peak
3
Thursday, Oct 29. Snow. High 46°8°, low 31°−1°. Typical 48°9° / 35°2°. Snow 0.14 in3.6 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Rain, 36°2°
  40% chance · 0.09 in2.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 41°5°
  40% chance · 0.02 in0.6 mm
3. Evening
  6 PM–midnight
  Drizzle, 37°3°
  40% chance · 0.02 in0.5 mm
4. Overnight
  midnight–6 AM
  Partly cloudy, 31°0°
  40% chance · 0.1 in0.4 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain and snow. Partly sunny, with a high near 46.
Night: A chance of rain before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 31.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
38°3°–46°8°
Low, likely
31°−1°–36°2°
Typical high / low
48°9° / 35°2°
Wind
7 mph11 km/h, gusts 21 mph34 km/h
Friday, Oct 30. Snow. High 44°7°, low 30°−1°. Typical 48°9° / 35°2°. Snow 0–1 in0–3 cm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 32°0°
  30% chance · 0.03 in0.7 mm
2. Afternoon
  noon–6 PM
  Cloudy, 37°3°
  30% chance · 0.01 in0.4 mm
3. Evening
  6 PM–midnight
  Cloudy, 34°1°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 29°−2°
  20% chance · 0.02 in0.5 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow before noon, then a slight chance of rain and snow. Mostly cloudy, with a high near 44.
Night: Mostly cloudy, with a low around 30.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
36°2°–44°7°
Low, likely
25°−4°–35°2°
Typical high / low
48°9° / 35°2°
Wind
9 mph15 km/h, gusts 26 mph41 km/h
UV peak
2
Saturday, Oct 31. Snow showers. High 38°3°, low 28°−2°. Typical 48°9° / 34°1°. Snow 0.04 in1 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 27°−3°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 37°3°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 34°1°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 29°−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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
35°2°–41°5°
Low, likely
23°−5°–33°1°
Typical high / low
48°9° / 34°1°
Wind
13 mph20 km/h
UV peak
3
Sunday, Nov 1. Snow. High 39°4°, low 29°−2°. Typical 47°8° / 34°1°. Snow 0–1 in0–3 cm, 10% chance. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 29°−2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 37°3°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 34°1°
  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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
36°2°–41°5°
Low, likely
22°−6°–33°1°
Typical high / low
47°8° / 34°1°
Wind
6 mph9 km/h, gusts 13 mph21 km/h
UV peak
3
Monday, Nov 2. Drizzle. High 40°4°, low 31°−1°. Typical 47°8° / 34°1°. Rain 0.06 in1.5 mm, 10% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 39°4°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
38°3°–42°6°
Low, likely
25°−4°–37°3°
Typical high / low
47°8° / 34°1°
Wind
12 mph19 km/h, gusts 36 mph57 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 52°, low 36°.
Tomorrow
Dry, high 51°, low 34°.
Monday
Dry, high 51°, low 36°.
Rest of week
Highs 38–48°; chance of precipitation on Tuesday.

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

Flathead River near Polson

7.9 mi

Below flood stage

Level: 5.5 ft
Flow: 7,250 cfs

Forecast peak 5.5 ft Sat 6 PM

Reading from Sat 1:50 PM · NWS gauge page

Swan River near Bigfork

21 mi

Below flood stage

Level: 2.3 ft
Flow: 444 cfs

Forecast peak 2.7 ft Sun 6 AM

Reading from Sat 2 PM · NWS gauge page

Flathead Lake at Polson

8.4 mi

Level: 2892 ft

Reading from Sat 2:30 PM · NWS gauge page

For your home

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

Heating this week

About 71% less heating than a typical week.

This week 46Typical 159

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 40
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 38°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?

Bigfork 13 S · official normals 1991–2020 · records 1938–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

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

Big Arm 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 58 min less
Golden hour: 5:48–6:51 PM; Morning 7:50–8:53 AM
Blue hour: 6:51–7:03 PM; Morning 7:38–7:50 AM; first light 7:38 AM

Stars tonight? Poor

Clouds most of the night (about 62% cover).

Moon

Waxing gibbous

98% lit · growing

Today: sets 6:23 AM · rises 5:33 PM
Full moon: Oct 25
New moon: Nov 9

Looking southeast from Big Arm. The highest point on the skyline is about 4,800 ft, 1 mi away.Skyline from USGS elevation data. Sky, sun and moon as they are now.