Sweet Grass County Weather Forecast

Current Conditions & 10-Day Outlook

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Current Weather Conditions in Sweet Grass County

Sweet Grass County

Montana, United States

weather iconClear sky
15°
Low 11°
High 29°

Hourly Sweet Grass County Weather Forecast

12 AMweather icon25°
1 AMweather icon24°
2 AMweather icon22°
3 AMweather icon18°
4 AMweather icon16°
5 AMweather icon16°
6 AMweather icon16°
7 AMweather icon15°
8 AMweather icon14°
9 AMweather icon13°
10 AMweather icon13°
11 AMweather icon12°
12 PMweather icon12°
1 PMweather icon11°
2 PMweather icon13°
3 PMweather icon16°
4 PMweather icon19°
5 PMweather icon24°
6 PMweather icon26°
7 PMweather icon27°
8 PMweather icon28°
9 PMweather icon29°
10 PMweather icon29°
11 PMweather icon29°
Wind
6kt SSW

Gentle wind.

6kt
NESW
Precipitation
34%

Moderate chance of precipitation.

Sweet Grass County 10-Day Weather Outlook

Today's Weather in Sweet Grass County, Montana, United States

Sun, Aug 16

Showers svg
11°
29°

Mon, Aug 17

Showers svg
12°
30°

Tue, Aug 18

Showers svg
18°
32°

Wed, Aug 19

Showers svg
16°
31°

Thu, Aug 20

Showers svg
15°
34°

Fri, Aug 21

Showers svg
16°
36°

Sat, Aug 22

Showers svg
17°
37°

Sun, Aug 23

Showers svg
14°
35°

Mon, Aug 24

Showers svg
15°
36°

Feels like

14°

Feels cooler than actual temperature.

Pressure

879 hPa

Expect unstable weather conditions.

Humidity

70%

High humidity.

UV

7 - High

Take precautions.

Gusts

21kt

Max speed of wind gusts today.

Cloud Cover

8%

Clear skies, no clouds expected.

Daylight

14h 5m

Long days, short nights.

Rain

1.1mm

No rain, dry conditions expected.

Snowfall

0.0mm

No snowfall expected.

Historical Climate Data

10 year average

View All

Current Air Quality in Sweet Grass County

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About Sweet Grass County Weather

General

This page provides the current weather forecast for Sweet Grass County, Montana, United States, including hourly conditions, a 10-day outlook, wind speed and direction, precipitation, UV index, and air quality - giving you everything you need to plan your day in one view.

Forecast & Methodology

The forecast data on this page is sourced from the ECMWF open-source model - a reliable global model used widely across weather services worldwide. For sailors, boaters, and mariners who need greater accuracy and higher resolution, PredictWind's proprietary forecast models deliver precision down to 1km resolution, updated multiple times daily and validated against real-world observations. Sign up free to access PredictWind's advanced forecasts.

Sailing & Marine Conditions

Sweet Grass County weather forecasts on PredictWind are optimised for sailors and boaters who need precise, reliable wind and wave data for passage planning and day sailing. PredictWind is used by ocean racers, cruising sailors, and commercial vessel operators across United States and worldwide. For detailed marine conditions including wave height, swell period, and offshore wind forecasts, sign up free to access PredictWind's full marine forecast suite.

Units

Wind speed is displayed in knots - the standard unit used by sailors, weather services, and maritime authorities. Temperature is shown in degrees Celsius. Use the toggle at the top of the page to switch between Celsius and Fahrenheit. Pressure is shown in hPa, rainfall in millimetres, and air quality is available in both US and EU AQI standards.