Weather forecast for 10 daysHelena, MT
Weather forecast for the weekend
Sunday Oct 18, 2026
- 64°F
- 34°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphNNW 346°
- Humidity: 54%
- UV index: 3
- Sunrise: 7:50 am MDT
- Sunset: 6:36 pm MDT
- details ▼
Today, on Sunday, October 18, clouds and sunshine will alternate throughout the day.
A notable temperature range, reaching a high of a comfortable 64.4°F and a low of an icy 33.8°F, is predicted.
Today, the expected high of 64.4°F is expected to reflect September's average high of 68.2°F.
Sunrise will be at 7:50 am and sunset at 6:36 pm; the daylight will last for 10h and 46min.
A notable temperature range, reaching a high of a comfortable 64.4°F and a low of an icy 33.8°F, is predicted.
Today, the expected high of 64.4°F is expected to reflect September's average high of 68.2°F.
Sunrise will be at 7:50 am and sunset at 6:36 pm; the daylight will last for 10h and 46min.
10-day overview
Daily temperatures
Warmest day: tomorrow 68°C.
Coldest period: Sunday - Monday 41°C.
Coldest period: Sunday - Monday 41°C.
Chance of precipitation
Highest chance: Friday 74%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 64°F
- 34°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphNNW 346°
- Humidity: 54%
- UV index: 3
- Sunrise: 7:50 am MDT
- Sunset: 6:36 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 68°F
- 37°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphSE 126°
- Humidity: 55%
- UV index: 3
- Sunrise: 7:51 am MDT
- Sunset: 6:34 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 64°F
- 37°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 6mphNW 326°
- Humidity: 55%
- UV index: 3
- Sunrise: 7:53 am MDT
- Sunset: 6:32 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 66°F
- 41°F
Mostly Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 6mphS 189°
- Humidity: 61%
- UV index: 3
- Sunrise: 7:54 am MDT
- Sunset: 6:30 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 66°F
- 45°F
Partly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 6mphWSW 239°
- Humidity: 65%
- UV index: 3
- Sunrise: 7:55 am MDT
- Sunset: 6:29 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 48°F
- 32°F
Rain
- Precip. probability: 74%
- Precipitation: 0.16"
- Wind: 11mphWNW 292°
- Humidity: 80%
- UV index: 2
- Sunrise: 7:57 am MDT
- Sunset: 6:27 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 48°F
- 28°F
Partly Cloudy
- Precip. probability: 9%
- Precipitation: 0.16"
- Wind: 6mphW 274°
- Humidity: 61%
- UV index: 3
- Sunrise: 7:58 am MDT
- Sunset: 6:25 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 41°F
- 28°F
Partly Cloudy
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 8mphNW 323°
- Humidity: 72%
- UV index: 2
- Sunrise: 8:00 am MDT
- Sunset: 6:24 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 41°F
- 27°F
Partly Cloudy
- Precip. probability: 20%
- Precipitation: 0"
- Wind: 7mphNW 321°
- Humidity: 70%
- UV index: 2
- Sunrise: 8:01 am MDT
- Sunset: 6:22 pm MDT
- details ▼
- Tuesday
- Oct 27, 2026
- 43°F
- 27°F
Partly Cloudy
- Precip. probability: 16%
- Precipitation: 0"
- Wind: 7mphW 278°
- Humidity: 78%
- UV index: 2
- Sunrise: 8:03 am MDT
- Sunset: 6:20 pm MDT
- details ▼
During the ten-day period, primarily gloomy and occasionally sunny and rain-soaked weather is anticipated.
With a 74% probability, rainfall is expected only on Friday. The precipitation will be light at 0.16".
The temperature will vary considerably throughout the forecast window. Forecast highs will fluctuate between 41°F and 68°F, while the lowest night temperatures will vary also significantly, as the lowest temperatures will be recorded between 26.6°F and 44.6°F.
The warmest day will be Monday, with a maximum of 68°F; the coldest days will be next Sunday and Monday, with a maximum of 41°F.
With a 74% probability, rainfall is expected only on Friday. The precipitation will be light at 0.16".
The temperature will vary considerably throughout the forecast window. Forecast highs will fluctuate between 41°F and 68°F, while the lowest night temperatures will vary also significantly, as the lowest temperatures will be recorded between 26.6°F and 44.6°F.
The warmest day will be Monday, with a maximum of 68°F; the coldest days will be next Sunday and Monday, with a maximum of 41°F.
Updated: Oct 18, 2026 @ 06:33:40 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 Sunday, some passing clouds may drift through, but the sun will shine at times.
Today, the highest temperature will be 64.4°F, while the lowest temperature will be 33.8°F.
Today, the highest temperature will be significantly higher than the average maximum of 51.3°F in October. Today, the lowest temperature will be in line with the average low temperature.
Today, the highest temperature will be significantly higher than the average maximum of 51.3°F in October. Today, the lowest temperature will be in line with the average low temperature.
On Sunday, in Helena, sunrise will be at 7:50 am and sunset at 6:36 pm (MDT).
In Helena, the length of the day today will be 10h and 46min.
