Weather forecast for tomorrowSaint Ignatius, MT

Weather forecast for tomorrow

Monday Oct 19, 2026

  • 64°F
  • 37°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 4mphNNE 23°
  • Humidity: 62%
  • UV index: 3
  • Sunrise: 8:01 am MDT
  • Sunset: 6:41 pm MDT
  • ▼
On Monday, October 19, clouds and sunshine will alternate throughout the day.
A wide temperature range is expected, from a high of an enjoyable 64.4°F to a low of an icy 37.4°F.
Expect temperatures to match September's average maximum of 68.5°F rather than October's 51.8°F.
Sunrise will be at 8:01 am and sunset at 6:41 pm; tomorrow's daylight will last for 10h and 40min.

Hourly overview

Hourly temperatures

Warmest period: 3 pm - 6 pm 61°C.
Coldest hour: 6 am 37°C.

Chance of precipitation

Highest chance: 12 am - 9 am 4%.

Hourly weather forecast

  • 12 am
  • 43°F
  • Feels like:
    43°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 2mphESE 119°
  • Humidity: 78%
  • Pressure: 30"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 2 am
  • 41°F
  • Feels like:
    41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 2mphSE 139°
  • Humidity: 81%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 4 am
  • 39°F
  • Feels like:
    39°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 2mphESE 116°
  • Humidity: 84%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 37°F
  • Feels like:
    37°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 2mphSE 127°
  • Humidity: 84%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 8 am
  • 37°F
  • Feels like:
    37°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 2mphSE 137°
  • Humidity: 83%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 8:01 am
  • 10 am
  • 45°F
  • Feels like:
    45°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 2mphESE 117°
  • Humidity: 74%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 12 pm
  • 52°F
  • Feels like:
    52°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 1mphN 349°
  • Humidity: 62%
  • Pressure: 29.88"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 2 pm
  • 57°F
  • Feels like:
    57°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphNNW 343°
  • Humidity: 54%
  • Pressure: 29.83"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 4 pm
  • 63°F
  • Feels like:
    63°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphN 1°
  • Humidity: 43%
  • Pressure: 29.83"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 61°F
  • Feels like:
    61°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 4mphNNW 328°
  • Humidity: 47%
  • Pressure: 29.83"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:41 pm
  • 8 pm
  • 52°F
  • Feels like:
    52°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphN 350°
  • Humidity: 65%
  • Pressure: 29.85"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 46°F
  • Feels like:
    46°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 2mphNW 317°
  • Humidity: 73%
  • Pressure: 29.88"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Tomorrow, primarily cloudy and occasionally mostly clear weather is expected.
The temperature will vary between a minimum of 37.4°F and a maximum of 64.4°F. The warmest part of the day is expected around 5 pm.
The temperature will feel more alike with September's average high than the expected maximum for October. The lowest temperature is expected to be a few degrees higher than the average minimum in October, typically 32.7°F.
Updated: Oct 18, 2026 @ 06:46:38 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Monday, mostly clear with scattered clouds is expected.

Tomorrow, the highest temperature will be 64.4°F, while the lowest temperature will be 37.4°F.
The highest temperature will be noticeably higher than the average maximum of 51.8°F in October. The lowest temperature will be slightly warmer than the average low of 32.7°F.

On Monday, in Saint Ignatius, sunrise will be at 8:01 am and sunset at 6:41 pm (MDT).

Tomorrow, the daylight will last for 10h and 40min.