Saint Ignatius, MT Weather Forecast

Local 7-day forecast

57°

Mostly Sunny

Track current conditions, temperature changes, wind, and the full daily outlook for Saint Ignatius, MT in one place.

Saturday, April 18, 2026

Wind: 5 mph S

Saturday

Mostly sunny, with a high near 57.

Local 7-day forecast

Local Weather Overview

This forecast page for Saint Ignatius, MT is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 14, 2026 4:38 AM MDT.

The active forecast window currently covers Apr 18 to Apr 20, 2026 for Saint Ignatius, MT.

Page Snapshot

Page focus: city weather
Forecast window: Apr 18 to Apr 20, 2026
Latest sync: Apr 14, 2026 4:38 AM MDT
Forecast office: MSO
Source: NOAA / NWS

Next High

57°F

Saturday

Next Low

34°F

Saturday Night

Rain Outlook

Periods mentioning precipitation

Windiest

6 to 9 mph

Monday

Daily Outlook

Today

Apr 18

Mostly Sunny

57 °F

/ 34°F

Wind 5 mph

Sun

Apr 19

Mostly Sunny

65 °F

/ 41°F

Wind 6 mph

Mon

Apr 20

Chance Light Rain

64 °F

Wind 6 to 9 mph

This Week in Saint Ignatius

Sunday looks like the warmest upcoming period in Saint Ignatius at 65 degrees F.

Saturday Night is the coolest period ahead with temperatures near 34 degrees F.

The strongest winds are forecast for Monday at about 6 to 9 mph SW.

Precipitation is mentioned in 2 upcoming forecast periods.

Forecast Details

Last updated: Apr 14, 2026 4:38 AM MDT
Coverage: 3 days
Time zone: America/Denver
Forecast office: MSO
Radar station: KMSX

Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.

Open NOAA source

Extended Forecast

Saturday Night

Apr 18

34°F

Partly Cloudy

6 mph SSE

Partly cloudy, with a low around 34.

Sunday

Apr 19

65°F

Mostly Sunny

6 mph S

Mostly sunny, with a high near 65.

Sunday Night

Apr 19

41°F

Mostly Cloudy then Slight Chance Light Rain

6 mph SE

A slight chance of rain after midnight. Mostly cloudy, with a low around 41.

Monday

Apr 20

64°F

Chance Light Rain

6 to 9 mph SW

A chance of rain. Partly sunny, with a high near 64.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
Saturday Apr 18	Mostly Sunny	57°F	5 mph S	Mostly sunny, with a high near 57.
Saturday Night Apr 18	Partly Cloudy	34°F	6 mph SSE	Partly cloudy, with a low around 34.
Sunday Apr 19	Mostly Sunny	65°F	6 mph S	Mostly sunny, with a high near 65.
Sunday Night Apr 19	Mostly Cloudy then Slight Chance Light Rain	41°F	6 mph SE	A slight chance of rain after midnight. Mostly cloudy, with a low around 41.
Monday Apr 20	Chance Light Rain	64°F	6 to 9 mph SW	A chance of rain. Partly sunny, with a high near 64.

Nearby Forecasts

Explore weather pages for nearby cities and major places around Saint Ignatius.

Region Links

Lake County weather

County forecast page

Montana weather

Statewide weather overview

United States weather

National weather entry point

Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.