Weather forecast for tomorrowBig Arm, MT
Weather forecast for tomorrow
Monday Oct 19, 2026
- 61°F
- 36°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 3mphNE 37°
- Humidity: 68%
- UV index: 2
- Sunrise: 8:02 am MDT
- Sunset: 6:41 pm MDT
- details ▼
On Monday, in Big Arm, a pleasant mix of sun and clouds will define the day.
The temperature scale will run from a maximum of a comfortable 60.8°F to a minimum of a wintry 35.6°F.
Temperatures are higher than average, more in line with September's norm of 67.6°F than with October's 51.1°F.
Sunrise will be at 8:02 am and sunset at 6:41 pm; tomorrow's daylight will last for 10h and 39min.
The temperature scale will run from a maximum of a comfortable 60.8°F to a minimum of a wintry 35.6°F.
Temperatures are higher than average, more in line with September's norm of 67.6°F than with October's 51.1°F.
Sunrise will be at 8:02 am and sunset at 6:41 pm; tomorrow's daylight will last for 10h and 39min.
Hourly overview
Hourly temperatures
Warmest period: 3 pm - 6 pm 57°C.
Coldest hour: 6 am 36°C.
Coldest hour: 6 am 36°C.
Chance of precipitation
Highest chance: 9 am 4%.
Hourly weather forecast
- 12 am
- 39°F
- Feels like:39°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 1mphNNW 344°
- Humidity: 81%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 37°F
- Feels like:37°F
Partly Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 1mphNW 320°
- Humidity: 84%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 37°F
- Feels like:37°F
Partly Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 1mphNNW 345°
- Humidity: 84%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 36°F
- Feels like:36°F
Partly Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 1mphNW 319°
- Humidity: 85%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 8 am
- 36°F
- Feels like:36°F
Partly Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 1mphNW 311°
- Humidity: 88%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 8:02 am
- 10 am
- 43°F
- Feels like:43°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 1mphNNE 14°
- Humidity: 84%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 12 pm
- 48°F
- Feels like:48°F
Partly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 1mphNE 42°
- Humidity: 70%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 2 pm
- 54°F
- Feels like:54°F
Mostly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphENE 73°
- Humidity: 58%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 4 pm
- 59°F
- Feels like:59°F
Partly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphENE 76°
- Humidity: 49%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 57°F
- Feels like:57°F
Partly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphNE 43°
- Humidity: 51%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:41 pm
- 8 pm
- 50°F
- Feels like:50°F
Mostly Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 2mphN 353°
- Humidity: 71%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 46°F
- Feels like:46°F
Mostly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 1mphNNW 336°
- Humidity: 77%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, on Monday, a combination of dull and dry and sunny weather is anticipated.
The temperature will vary between a minimum of 35.6°F and a maximum of 59°F. The warmest part of the day will be at 4 pm and 5 pm.
The day’s peak temperature will reflect September's norm of 67.6°F more than October's 51.1°F. The expected low will be close to the average minimum in October, which is 33.1°F.
The temperature will vary between a minimum of 35.6°F and a maximum of 59°F. The warmest part of the day will be at 4 pm and 5 pm.
The day’s peak temperature will reflect September's norm of 67.6°F more than October's 51.1°F. The expected low will be close to the average minimum in October, which is 33.1°F.
Updated: Oct 18, 2026 @ 15:48:45 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
On Monday, in Big Arm, variable cloud cover will persist, but sunshine will break through.
Tomorrow, the highest temperature will be 60.8°F, while the lowest temperature will be 35.6°F.
The maximum temperature will be significantly higher than the average highest temperature of 51.1°F in October. The lowest temperature will be in line with the average low of 33.1°F.
The maximum temperature will be significantly higher than the average highest temperature of 51.1°F in October. The lowest temperature will be in line with the average low of 33.1°F.
On Monday, in Big Arm, sunrise will be at 8:02 am and sunset at 6:41 pm (MDT).
In Big Arm, tomorrow, there will be 10h and 39min of daylight.
