Observed 5:45 AM MDT at KMSO

St. Ignatius, MT weather

Clear and 37°3°.

Mostly agree

Now 37°3°

Clear · Feels like 30°−1°

Feels like: 30°−1°; Wind chill from 10 mph17 km/h wind · air 37°3°
Wind: 10 mph17 km/h; From the southeast. Up to 10 mph17 km/h through 6 PM
Dew point: 28°−2°; Dry · up to 38°3° by 11 AM (comfortable)
UV tomorrow: 3Moderate; Moderate 1–4 PM · peak 3
Pressure: 30.31 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

Below freezing until 10 AM (low 30°−1°)
Above 40°4° today by noon
Hard freeze tomorrow 4–10 AM (low 28°−2°)
Fog tomorrow 6–9 AM
Below freezing tomorrow night from 4 AM (low 31°−1°)

This morningUp to 39°4° by 11 AM · freezing, low 30°−1° · Clear
This afternoonUp to 52°11° by 4 PM · Partly cloudy
TonightDown to 31°−1° by 5 AM · freezing, low 31°−1° · Partly cloudy
Tomorrow morningUp to 38°3° by 11 AM · Partly cloudy · freezing, low 28°−2°
Tomorrow afternoonUp to 52°11° by 4 PM · Mostly cloudy
Tomorrow nightDown to 31°−1° by 5 AM · freezing, low 31°−1° · 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	Clear	32°0° (likely 32°0° to 39°4°)	26°−3°	0%	6 mph10 km/h from SE, gusts 10 mph16 km/h	100%	7%	0
Sat 7a	Clear	30°−1° (likely 30°−1° to 39°4°)	24°−4°	0%	6 mph10 km/h from SE, gusts 11 mph17 km/h	100%	7%	0
Sat 8a	Sunny	30°−1° (likely 30°−1° to 39°4°)	25°−4°	0%	5 mph8 km/h from SE, gusts 12 mph20 km/h	100%	4%	0
Sat 9a	Sunny	32°0° (likely 32°0° to 40°4°)	26°−3°	0%	6 mph10 km/h from SE, gusts 12 mph19 km/h	100%	7%	0
Sat 10a	Sunny	36°2° (likely 36°2° to 44°7°)	32°0°	0%	5 mph8 km/h from SSE, gusts 13 mph20 km/h	100%	15%	0
Sat 11a	Partly sunny	39°4° (likely 39°4° to 48°9°)	37°3°	0%	3 mph5 km/h from SSE, gusts 13 mph21 km/h	97%	51%	1
Sat 12p	Mostly sunny	42°6° (likely 42°6° to 51°11°)	40°4°	0%	3 mph5 km/h from S, gusts 10 mph17 km/h	87%	53%	2
Sat 1p	Mostly sunny	47°8° (likely 47°8° to 53°12°)	47°8°	0%	2 mph3 km/h from S, gusts 7 mph12 km/h	75%	43%	2
Sat 2p	Sunny	49°9° (likely 49°9° to 55°13°)	49°9°	0%	2 mph3 km/h from S, gusts 4 mph7 km/h	66%	40%	2
Sat 3p	Sunny	51°11° (likely 51°11° to 55°13°)	51°11°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	60%	40%	2
Sat 4p	Sunny	52°11° (likely 51°11° to 55°13°)	52°11°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	57%	43%	1
Sat 5p	Partly sunny	51°11° (likely 51°11° to 54°12°)	51°11°	0%	2 mph3 km/h from NE, gusts 5 mph8 km/h	59%	48%	1
Sat 6p	Partly sunny	49°9° (likely 48°9° to 52°11°)	49°9°	0%	1 mph2 km/h from ENE, gusts 3 mph5 km/h	65%	69%	1
Sat 7p	Partly cloudy	43°6° (likely 43°6° to 50°10°)	43°6°	0%	2 mph3 km/h from SE, gusts 2 mph3 km/h	85%	71%	0
Sat 8p	Cloudy	39°4° (likely 39°4° to 48°9°)	37°3°	0%	3 mph5 km/h from SSE, gusts 3 mph4 km/h	90%	80%	0
Sat 9p	Cloudy	39°4° (likely 39°4° to 46°8°)	35°2°	0%	6 mph10 km/h from SE, gusts 3 mph5 km/h	93%	82%	0
Sat 10p	Cloudy	38°3° (likely 38°3° to 45°7°)	34°1°	0%	5 mph8 km/h from SE, gusts 3 mph5 km/h	94%	77%	0
Sat 11p	Partly cloudy	37°3° (likely 37°3° to 44°7°)	33°1°	0%	5 mph8 km/h from SE, gusts 2 mph4 km/h	94%	66%	0
Sun 12a	Partly cloudy	37°3° (likely 37°3° to 43°6°)	33°1°	0%	5 mph8 km/h from SE, gusts 3 mph5 km/h	94%	67%	0
Sun 1a	Partly cloudy	35°2° (likely 35°2° to 42°6°)	32°0°	0%	3 mph5 km/h from SE, gusts 2 mph3 km/h	96%	55%	0
Sun 2a	Partly cloudy	34°1° (likely 34°1° to 41°5°)	31°−1°	0%	3 mph5 km/h from ESE, gusts 3 mph4 km/h	99%	50%	0
Sun 3a	Clear	34°1° (likely 34°1° to 41°5°)	31°−1°	0%	3 mph5 km/h from ESE, gusts 2 mph3 km/h	97%	35%	0
Sun 4a	Mostly clear	32°0° (likely 32°0° to 40°4°)	29°−2°	0%	3 mph5 km/h from ESE, gusts 2 mph3 km/h	99%	21%	0
Sun 5a	Partly cloudy	31°−1° (likely 31°−1° to 40°4°)	28°−2°	0%	3 mph5 km/h from ESE, gusts 2 mph3 km/h	99%	47%	0
Sun 6a	Fog	30°−1° (likely 30°−1° to 39°4°)	26°−3°	0%	3 mph5 km/h from E, gusts 2 mph3 km/h	100%	50%	0
Sun 7a	Fog	29°−2° (likely 29°−2° to 39°4°)	25°−4°	0%	3 mph5 km/h from E, gusts 2 mph4 km/h	100%	57%	0
Sun 8a	Fog	28°−2° (likely 28°−2° to 39°4°)	24°−4°	0%	3 mph5 km/h from E, gusts 2 mph4 km/h	100%	55%	0
Sun 9a	Mostly cloudy	30°−1° (likely 30°−1° to 39°4°)	30°−1°	0%	2 mph3 km/h from NE, gusts 2 mph4 km/h	100%	61%	0
Sun 10a	Mostly cloudy	36°2° (likely 35°2° to 42°6°)	36°2°	0%	2 mph3 km/h from NE, gusts 3 mph4 km/h	96%	61%	1
Sun 11a	Mostly cloudy	38°3° (likely 38°3° to 47°8°)	38°3°	0%	2 mph3 km/h from NE, gusts 4 mph7 km/h	93%	51%	2
Sun 12p	Mostly cloudy	41°5° (likely 41°5° to 50°10°)	41°5°	0%	2 mph3 km/h from NNW, gusts 4 mph7 km/h	86%	53%	2
Sun 1p	Mostly cloudy	46°8° (likely 46°8° to 52°11°)	46°8°	0%	2 mph3 km/h from NNW, gusts 5 mph8 km/h	75%	62%	3
Sun 2p	Mostly cloudy	49°9° (likely 49°9° to 54°12°)	49°9°	0%	2 mph3 km/h from NNW, gusts 5 mph8 km/h	67%	69%	3
Sun 3p	Cloudy	50°10° (likely 50°10° to 54°12°)	49°9°	0%	3 mph5 km/h from NW, gusts 5 mph7 km/h	63%	72%	3
Sun 4p	Mostly cloudy	52°11° (likely 51°11° to 54°12°)	52°11°	0%	3 mph5 km/h from NW, gusts 5 mph9 km/h	60%	68%	2
Sun 5p	Mostly cloudy	50°10° (likely 50°10° to 53°12°)	49°9°	0%	3 mph5 km/h from NW, gusts 6 mph9 km/h	64%	60%	1
Sun 6p	Mostly cloudy	48°9° (likely 47°8° to 50°10°)	47°8°	0%	3 mph5 km/h from N, gusts 3 mph5 km/h	67%	57%	1
Sun 7p	Mostly cloudy	42°6° (likely 42°6° to 48°9°)	40°4°	0%	3 mph5 km/h from N, gusts 4 mph7 km/h	90%	60%	0
Sun 8p	Cloudy	39°4° (likely 39°4° to 47°8°)	37°3°	0%	3 mph5 km/h from N, gusts 8 mph12 km/h	98%	67%	0
Sun 9p	Mostly cloudy	38°3° (likely 38°3° to 46°8°)	34°1°	0%	6 mph10 km/h from ESE, gusts 10 mph16 km/h	97%	72%	0
Sun 10p	Mostly cloudy	37°3° (likely 37°3° to 45°7°)	32°0°	0%	6 mph10 km/h from ESE, gusts 10 mph17 km/h	98%	71%	0
Sun 11p	Mostly cloudy	36°2° (likely 35°2° to 44°7°)	31°−1°	0%	6 mph10 km/h from ESE, gusts 9 mph14 km/h	98%	71%	0
Mon 12a	Cloudy	36°2° (likely 34°1° to 43°6°)	32°0°	0%	5 mph8 km/h from ESE, gusts 7 mph11 km/h	97%	75%	0
Mon 1a	Mostly cloudy	35°2° (likely 32°0° to 41°5°)	31°−1°	0%	5 mph8 km/h from ESE, gusts 4 mph6 km/h	97%	81%	0
Mon 2a	Mostly cloudy	34°1° (likely 32°0° to 41°5°)	30°−1°	0%	5 mph8 km/h from ESE, gusts 3 mph5 km/h	96%	84%	0
Mon 3a	Mostly cloudy	33°1° (likely 32°0° to 40°4°)	30°−1°	0%	3 mph5 km/h from ESE, gusts 3 mph5 km/h	96%	87%	0
Mon 4a	Mostly cloudy	32°0° (likely 32°0° to 40°4°)	29°−2°	0%	3 mph5 km/h from ESE, gusts 3 mph5 km/h	97%	84%	0
Mon 5a	Mostly cloudy	31°−1° (likely 31°−1° to 39°4°)	28°−2°	0%	3 mph5 km/h from ESE, gusts 3 mph5 km/h	98%	81%	0

Days ahead

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

Today, Oct 24. Cloudy. High 53°12°, low 28°−2°. Typical 55°13° / 32°0°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 30°−1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 52°11°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 31°−1°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 53. South southeast wind 2 to 6 mph.
Tonight: Partly cloudy, with a low around 28. Southeast wind 1 to 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
51°11°–55°13°
Low, likely
28°−2°–39°4°
Typical high / low
55°13° / 32°0°
Wind
11 mph17 km/h, gusts 20 mph32 km/h
UV peak
3
Tomorrow, Oct 25. Fog. High 52°11°, low 28°−2°. Typical 54°12° / 32°0°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly cloudy, 28°−2°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 52°11°
  Dry
3. Evening
  6 PM–midnight
  Mostly cloudy, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Mostly cloudy, 31°−1°
  Dry
Official NWS forecast
Day: Patchy fog before 9am. Partly sunny, with a high near 52. North northeast wind around 3 mph.
Night: Mostly cloudy, with a low around 28. East wind around 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
51°11°–55°13°
Low, likely
28°−2°–38°3°
Typical high / low
54°12° / 32°0°
Wind
10 mph16 km/h, gusts 21 mph33 km/h
UV peak
3
Monday, Oct 26. Mostly cloudy. High 54°12°, low 30°−1°. Typical 54°12° / 31°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 50°10°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 42°6°
  60% chance · 0.06 in1.5 mm
4. Overnight
  midnight–6 AM
  Rain, 40°5°
  60% chance · 0.12 in3 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 54. South wind around 2 mph.
Night: Rain likely. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
48°9°–54°12°
Low, likely
30°−1°–38°3°
Typical high / low
54°12° / 31°−1°
Wind
7 mph11 km/h, gusts 20 mph31 km/h
UV peak
3
Tuesday, Oct 27. Snow. High 48°9°, low 29°−2°. Typical 53°12° / 31°−1°. Snow < 1 in< 2 cm, 60% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 40°4°
  60% chance · 0.02 in0.5 mm
2. Afternoon
  noon–6 PM
  Drizzle, 47°8°
  70% chance · 0.06 in1.5 mm
3. Evening
  6 PM–midnight
  Snow, 42°6°
  70% chance · 0.03 in0.9 mm
4. Overnight
  midnight–6 AM
  Partly cloudy, 38°3°
  50% chance · 0.02 in0.6 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain and snow likely. Mostly cloudy, with a high near 48. New rainfall amounts less than a tenth of an inch possible.
Night: Rain likely. Mostly cloudy, with a low around 29.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
44°7°–49°9°
Low, likely
29°−2°–39°4°
Typical high / low
53°12° / 31°−1°
Wind
5 mph9 km/h, gusts 20 mph33 km/h
Wednesday, Oct 28. Rain. High 50°10°, low 25°−4°. Typical 53°12° / 31°−1°. Rain 0.09 in2.3 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 38°4°
  30% chance · 0.02 in0.5 mm
2. Afternoon
  noon–6 PM
  Partly sunny, 49°10°
  30% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Partly cloudy, 42°5°
  30% chance · 0.2 in0.4 cm
4. Overnight
  midnight–6 AM
  Snow, 35°1°
  30% chance · 0.1 in0.3 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 50.
Night: A chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 25.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
46°8°–52°11°
Low, likely
25°−4°–38°3°
Typical high / low
53°12° / 31°−1°
Wind
8 mph12 km/h
UV peak
3
Thursday, Oct 29. Snow. High 47°8°, low 24°−4°. Typical 52°11° / 31°−1°. Snow < 1 in< 2 cm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 35°2°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 47°9°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 42°5°
  30% chance · 0.02 in0.4 mm
4. Overnight
  midnight–6 AM
  Snow, 36°2°
  30% chance · 0.02 in0.5 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow before 3pm, then a slight chance of rain and snow. Partly sunny, with a high near 47.
Night: A chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 24.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
44°7°–50°10°
Low, likely
24°−4°–35°2°
Typical high / low
52°11° / 31°−1°
Wind
4 mph7 km/h, gusts 17 mph28 km/h
UV peak
3
Friday, Oct 30. Snow. High 48°9°, low 25°−4°. Typical 52°11° / 30°−1°. Snow 0–1 in0–3 cm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Snow, 37°3°
  20% chance · 0.2 in0.6 cm
2. Afternoon
  noon–6 PM
  Snow, 42°5°
  20% chance
3. Evening
  6 PM–midnight
  Partly cloudy, 37°3°
  Dry
4. Overnight
  midnight–6 AM
  Drizzle, 33°1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow. Partly sunny, with a high near 48.
Night: A slight chance of snow before 9pm, then a slight chance of rain between 9pm and midnight, then a slight chance of snow. Mostly cloudy, with a low around 25.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
41°5°–48°9°
Low, likely
25°−4°–37°3°
Typical high / low
52°11° / 30°−1°
Wind
6 mph9 km/h, gusts 16 mph26 km/h
UV peak
2
Saturday, Oct 31. Drizzle. High 42°6°, low 30°−1°. Typical 51°11° / 30°−1°. Rain 0.07 in1.8 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 43°6°
  Dry
3. Evening
  6 PM–midnight
  Snow, 36°2°
  20% chance · 0.1 in0.4 cm
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
40°4°–44°7°
Low, likely
27°−3°–32°0°
Typical high / low
51°11° / 30°−1°
Wind
12 mph19 km/h, gusts 17 mph27 km/h
UV peak
3
Sunday, Nov 1. Sunny. High 44°7°, low 31°−1°. Typical 51°11° / 30°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 33°0°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 44°7°
  Dry
3. Evening
  6 PM–midnight
  Clear, 37°3°
  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
41°5°–49°9°
Low, likely
29°−2°–32°0°
Typical high / low
51°11° / 30°−1°
Wind
7 mph12 km/h, gusts 15 mph25 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 45°7°, low 32°0°. Typical 50°10° / 30°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 47°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
38°3°–53°12°
Low, likely
30°−1°–35°2°
Typical high / low
50°10° / 30°−1°
Wind
7 mph12 km/h, gusts 14 mph23 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 53°, low 28°.
Tomorrow
Dry, high 52°, low 28°.
Monday
Dry, high 54°, low 30°.
Rest of week
Highs 42–50°; 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

South Fork Jocko near Arlee MT

14 mi

Level: 1.3 ft
Flow: 24 cfs

Reading from Sat 4:15 AM · NWS gauge page

Flathead River at Perma

23 mi

Level: 8.6 ft
Flow: 7,650 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 68% less heating than a typical week.

This week 51Typical 160

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 37
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 34 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 28°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?

Saint Ignatius · official normals 1991–2020 · records 1896–2026

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

Sun & moon

Sun

Daylight: 10 h 24 min; Losing 3 min 8 s a day; shortest Dec 21, 1 h 56 min less
Golden hour: 5:49–6:51 PM; Morning 7:48–8:51 AM
Blue hour: 6:51–7:03 PM; Morning 7:36–7:48 AM; first light 7:36 AM

Stars tonight? Good

Clear 6:03–7:36 AM; moon 96% lit but below the horizon.

Moon

Waxing gibbous

96% lit · growing

Today: sets 6:22 AM · rises 5:33 PM
Full moon: Oct 25
New moon: Nov 9

Looking east from St. Ignatius. The highest point on the skyline is about 9,700 ft, 9 mi away.Skyline from USGS elevation data, heights drawn up to 2.5× taller. Sky, sun and moon as they are now.