As of 17:02 MDT

Weather in Sweet Grass, MT

80°

Sweet Grass, Saturday, 8 August, 17:02

Overcast. Feels like 80°. High 81°, low 51°.

Pressure29.88 inHg

Wind7.7 mph NE

Humidity32%

Visibility6.2 mi

Dew point47°

See detailed hourly forecast

Sun, 0978° / 51°

78 °

Sweet Grass, Sunday, 9 August

Mostly clear. High 78°, low 51°.

Pressure29.97 inHg

Wind15.3 mph N

Humidity47%

Visibility6.2 mi

Dew point49°

Mon, 1082° / 45°

82 °

Sweet Grass, Monday, 10 August

Clear. High 82°, low 45°.

Pressure29.88 inHg

Wind3 mph SE

Humidity39%

Visibility6.2 mi

Dew point46°

Tue, 1179° / 52°

79 °

Sweet Grass, Tuesday, 11 August

Clear. High 79°, low 52°.

Pressure30.03 inHg

Wind9.4 mph NE

Humidity45%

Visibility6.2 mi

Dew point48°

Wed, 1280° / 58°

0.01

80 °

Sweet Grass, Wednesday, 12 August

Light rain. High 80°, low 58°.

Pressure29.94 inHg

Wind10.8 mph NE

Humidity40%

Visibility6.2 mi

Dew point48°

Thu, 1383° / 52°

0.09

83 °

Sweet Grass, Thursday, 13 August

Light rain. High 83°, low 52°.

Pressure29.91 inHg

Wind13.9 mph SE

Humidity44%

Visibility—

Dew point46°

Fri, 1473° / 54°

0.04

73 °

Sweet Grass, Friday, 14 August

Light rain. High 73°, low 54°.

Pressure30.00 inHg

Wind15.7 mph NW

Humidity71%

Visibility—

Dew point49°

Sat, 1574° / 53°

74 °

Sweet Grass, Saturday, 15 August

Overcast. High 74°, low 53°.

Pressure30.06 inHg

Wind12.2 mph NE

Humidity50%

Visibility—

Dew point44°

Sun, 1685° / 59°

0.12

85 °

Sweet Grass, Sunday, 16 August

Light rain. High 85°, low 59°.

Pressure29.94 inHg

Wind14.2 mph W

Humidity32%

Visibility—

Dew point42°

Mon, 1784° / 59°

84 °

Sweet Grass, Monday, 17 August

Overcast. High 84°, low 59°.

Pressure30.06 inHg

Wind9.3 mph E

Humidity47%

Visibility—

Dew point49°

Tue, 1882° / 66°

82 °

Sweet Grass, Tuesday, 18 August

Overcast. High 82°, low 66°.

Pressure29.94 inHg

Wind19.4 mph S

Humidity22%

Visibility—

Dew point36°

Wed, 1984° / 57°

84 °

Sweet Grass, Wednesday, 19 August

Overcast. High 84°, low 57°.

Pressure30.00 inHg

Wind15.7 mph SE

Humidity31%

Visibility—

Dew point42°

Thu, 2090° / 64°

90 °

Sweet Grass, Thursday, 20 August

Overcast. High 90°, low 64°.

Pressure29.83 inHg

Wind18.3 mph W

Humidity18%

Visibility—

Dew point34°

Fri, 2181° / 60°

81 °

Sweet Grass, Friday, 21 August

Clear. High 81°, low 60°.

Pressure29.97 inHg

Wind12.5 mph N

Humidity47%

Visibility—

Dew point51°

Sat, 2283° / 65°

83 °

Sweet Grass, Saturday, 22 August

Overcast. High 83°, low 65°.

Pressure29.97 inHg

Wind11.6 mph SE

Humidity41%

Visibility—

Dew point50°

Sun, 2384° / 62°

84 °

Sweet Grass, Sunday, 23 August

Clear. High 84°, low 62°.

Pressure30.09 inHg

Wind12.3 mph NE

Humidity35%

Visibility—

Dew point46°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Sweet Grass, MT are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Sweet Grass, MT since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.