Weather forecast for tomorrowSphinx, MT

Weather forecast for tomorrow

Sunday Oct 18, 2026

  • 64°F
  • 34°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 7mphS 190°
  • Humidity: 46%
  • UV index: 3
  • Sunrise: 7:43 am MDT
  • Sunset: 6:33 pm MDT
  • ▼
On Sunday, October 18, open skies and radiant sunshine are expected.
Dramatic temperature shifts from a high of a comfortable 64.4°F to a low of a wintry 33.8°F are anticipated.
The anticipated high is warmer and better reflects September's normal temperature profile than that of October.
Sunrise will be at 7:43 am and sunset at 6:33 pm; tomorrow's daylight will last for 10h and 50min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 63°C.
Coldest hour: 6 am 36°C.

Chance of precipitation

Highest chance: 3 am - 6 am 2%.

Hourly weather forecast

  • 12 am
  • 43°F
  • Feels like:
    37°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 9mphS 179°
  • Humidity: 58%
  • Pressure: 30.09"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 2 am
  • 39°F
  • Feels like:
    34°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 7mphS 190°
  • Humidity: 66%
  • Pressure: 30.09"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 4 am
  • 37°F
  • Feels like:
    32°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 7mphSSW 194°
  • Humidity: 70%
  • Pressure: 30.09"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 36°F
  • Feels like:
    30°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 6mphSSW 208°
  • Humidity: 74%
  • Pressure: 30.12"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:43 am
  • 8 am
  • 34°F
  • Feels like:
    30°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 6mphSW 216°
  • Humidity: 77%
  • Pressure: 30.12"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 am
  • 45°F
  • Feels like:
    43°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphS 173°
  • Humidity: 60%
  • Pressure: 30.09"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 12 pm
  • 55°F
  • Feels like:
    54°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphSSE 159°
  • Humidity: 39%
  • Pressure: 30.03"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 2 pm
  • 61°F
  • Feels like:
    61°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphS 172°
  • Humidity: 30%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 4 pm
  • 63°F
  • Feels like:
    63°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphSSW 204°
  • Humidity: 25%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 57°F
  • Feels like:
    57°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSW 226°
  • Humidity: 34%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:33 pm
  • 8 pm
  • 48°F
  • Feels like:
    46°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphSSW 203°
  • Humidity: 50%
  • Pressure: 30"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 43°F
  • Feels like:
    39°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 5mphSSW 200°
  • Humidity: 58%
  • Pressure: 30.03"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Tomorrow, a combination of dull and sun-filled weather is expected.
The temperature will be between a minimum of 33.8°F and a maximum of 62.6°F. The warmest part of the day will be from 3 pm to 5 pm.
The highest temperature is more close to September's average maximum of 63.5°F than October's usual of 45.5°F. The minimum temperature tomorrow will be also more consistent with September's average low of 39.6°F than October's of 27.5°F.
Updated: Oct 17, 2026 @ 18:09:56 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Tomorrow, sunshine will lead the day, with clouds making only brief appearances.

Tomorrow, the maximum temperature will be 64.4°F, while the minimum temperature will be 33.8°F.
The highest temperature tomorrow will be uncommonly higher than the average maximum of 45.5°F in October. The lowest temperature will be slightly warmer than the average low of 27.5°F.

On Sunday, in Sphinx, sunrise will be at 7:43 am and sunset at 6:33 pm (MDT).

Tomorrow, the daylight will last for 10h and 50min.