Weather forecast for 10 daysGeyser, MT
Weather forecast for the weekend
Sunday Oct 18, 2026
- 59°F
- 39°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 12mphESE 106°
- Humidity: 46%
- UV index: 3
- Sunrise: 7:45 am MDT
- Sunset: 6:28 pm MDT
- details ▼
Today, on Sunday, October 18, expect partly sunny skies with periods of cloudiness.
The temperature will fluctuate from a high of a moderate 59°F to a low of an icy 39.2°F.
Today, the forecasted high will be higher and much closer to September's average high of 62.8°F than October's 46.4°F.
Sunrise will be at 7:45 am and sunset at 6:28 pm; the daylight will last for 10h and 44min.
The temperature will fluctuate from a high of a moderate 59°F to a low of an icy 39.2°F.
Today, the forecasted high will be higher and much closer to September's average high of 62.8°F than October's 46.4°F.
Sunrise will be at 7:45 am and sunset at 6:28 pm; the daylight will last for 10h and 44min.
10-day overview
Daily temperatures
Maximum temperature: 70°C.
Coldest period: Sunday - Monday 41°C.
Coldest period: Sunday - Monday 41°C.
Chance of precipitation
Highest chance: Friday 65%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 59°F
- 39°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 12mphESE 106°
- Humidity: 46%
- UV index: 3
- Sunrise: 7:45 am MDT
- Sunset: 6:28 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 70°F
- 43°F
Mostly Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 8mphSW 218°
- Humidity: 40%
- UV index: 3
- Sunrise: 7:46 am MDT
- Sunset: 6:27 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 61°F
- 39°F
Partly Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 9mphWNW 292°
- Humidity: 48%
- UV index: 2
- Sunrise: 7:48 am MDT
- Sunset: 6:25 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 70°F
- 48°F
Mostly Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 8mphSW 233°
- Humidity: 45%
- UV index: 3
- Sunrise: 7:49 am MDT
- Sunset: 6:23 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 70°F
- 46°F
Partly Cloudy
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 9mphSW 232°
- Humidity: 43%
- UV index: 3
- Sunrise: 7:50 am MDT
- Sunset: 6:21 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 50°F
- 34°F
Showers
- Precip. probability: 65%
- Precipitation: 0.04"
- Wind: 17mphW 275°
- Humidity: 73%
- UV index: 2
- Sunrise: 7:52 am MDT
- Sunset: 6:20 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 45°F
- 28°F
Partly Cloudy
- Precip. probability: 9%
- Precipitation: 0.24"
- Wind: 13mphW 261°
- Humidity: 60%
- UV index: 2
- Sunrise: 7:53 am MDT
- Sunset: 6:18 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 41°F
- 30°F
Partly Cloudy
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 11mphWSW 256°
- Humidity: 69%
- UV index: 2
- Sunrise: 7:55 am MDT
- Sunset: 6:16 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 41°F
- 28°F
Partly Cloudy
- Precip. probability: 16%
- Precipitation: 0"
- Wind: 9mphW 262°
- Humidity: 66%
- UV index: 2
- Sunrise: 7:56 am MDT
- Sunset: 6:14 pm MDT
- details ▼
- Tuesday
- Oct 27, 2026
- 45°F
- 30°F
Partly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 11mphW 259°
- Humidity: 70%
- UV index: 2
- Sunrise: 7:58 am MDT
- Sunset: 6:13 pm MDT
- details ▼
Primarily cloudy and occasionally sun-filled and rain-filled weather is anticipated.
With a 65% probability, rainfall is expected only on Friday. The precipitation will be light at 0.24".
There will be a considerable variation in temperature in the upcoming period. The maximum temperature will vary between 41°F and 69.8°F, while the difference in minimum temperatures will be also substantial, as temperatures overnight will fluctuate from 28.4°F up to 48.2°F.
With a maximum temperature of 69.8°F, Monday, Wednesday and Thursday will be the warmest days; with a maximum temperature of 41°F, next Sunday and Monday will be the coldest days.
With a 65% probability, rainfall is expected only on Friday. The precipitation will be light at 0.24".
There will be a considerable variation in temperature in the upcoming period. The maximum temperature will vary between 41°F and 69.8°F, while the difference in minimum temperatures will be also substantial, as temperatures overnight will fluctuate from 28.4°F up to 48.2°F.
With a maximum temperature of 69.8°F, Monday, Wednesday and Thursday will be the warmest days; with a maximum temperature of 41°F, next Sunday and Monday will be the coldest days.
Updated: Oct 18, 2026 @ 07:08:38 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
Today, a partly cloudy sky is anticipated.
Today, the maximum temperature will be 59°F, while the minimum temperature will be 39.2°F.
The maximum temperature today will be notably higher than the average highest temperature of 46.4°F in October. The lowest temperature will be also notably higher than the average low of 29.8°F.
The maximum temperature today will be notably higher than the average highest temperature of 46.4°F in October. The lowest temperature will be also notably higher than the average low of 29.8°F.
On Sunday, in Geyser, sunrise will be at 7:45 am and sunset at 6:28 pm (MDT).
In Geyser, Montana, today, there will be 10h and 44min of daylight.
