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As of 23:19 MDT

Weather in Grantsdale, MT

72°Current weather

Grantsdale, Saturday, 8 August, 23:19

Partly cloudy. Feels like 70°. High 90°, low 54°.

Pressure30.03 inHg
Wind4 mph SE
Humidity29%
Visibility6.2 mi
Dew point38°
Sun, 0990° / 54°0Partly cloudy
90 °Partly cloudy

Grantsdale, Sunday, 9 August

Partly cloudy. High 90°, low 54°.

Pressure29.88 inHg
Wind2.6 mph E
Humidity14%
Visibility6.2 mi
Dew point29°
Mon, 1092° / 53°0Clear
92 °Clear

Grantsdale, Monday, 10 August

Clear. High 92°, low 53°.

Pressure29.85 inHg
Wind2.4 mph NE
Humidity16%
Visibility6.2 mi
Dew point34°
Tue, 1193° / 59°0Clear
93 °Clear

Grantsdale, Tuesday, 11 August

Clear. High 93°, low 59°.

Pressure29.94 inHg
Wind3 mph NE
Humidity16%
Visibility6.2 mi
Dew point33°
Wed, 1294° / 64°0.01Light rain
94 °Light rain

Grantsdale, Wednesday, 12 August

Light rain. High 94°, low 64°.

Pressure29.80 inHg
Wind4.3 mph NE
Humidity16%
Visibility6.2 mi
Dew point33°
Thu, 1389° / 60°0Partly cloudy
89 °Partly cloudy

Grantsdale, Thursday, 13 August

Partly cloudy. High 89°, low 60°.

Pressure29.77 inHg
Wind10.8 mph NW
Humidity24%
Visibility—
Dew point41°
Fri, 1489° / 56°0Mostly clear
89 °Mostly clear

Grantsdale, Friday, 14 August

Mostly clear. High 89°, low 56°.

Pressure29.94 inHg
Wind6.7 mph W
Humidity25%
Visibility—
Dew point38°
Sat, 1589° / 55°0Overcast
89 °Overcast

Grantsdale, Saturday, 15 August

Overcast. High 89°, low 55°.

Pressure30.03 inHg
Wind6.5 mph NW
Humidity28%
Visibility—
Dew point41°
Sun, 1692° / 61°0Mostly clear
92 °Mostly clear

Grantsdale, Sunday, 16 August

Mostly clear. High 92°, low 61°.

Pressure29.97 inHg
Wind10.1 mph W
Humidity18%
Visibility—
Dew point38°
Mon, 1795° / 64°0Overcast
95 °Overcast

Grantsdale, Monday, 17 August

Overcast. High 95°, low 64°.

Pressure29.94 inHg
Wind10.1 mph W
Humidity16%
Visibility—
Dew point37°
Tue, 1886° / 61°0.13Light rain
86 °Light rain

Grantsdale, Tuesday, 18 August

Light rain. High 86°, low 61°.

Pressure30.12 inHg
Wind4.6 mph NE
Humidity46%
Visibility—
Dew point53°
Wed, 1987° / 60°0.02Light rain
87 °Light rain

Grantsdale, Wednesday, 19 August

Light rain. High 87°, low 60°.

Pressure29.97 inHg
Wind9.6 mph W
Humidity27%
Visibility—
Dew point42°
Thu, 2090° / 62°0.2Rain
90 °Rain

Grantsdale, Thursday, 20 August

Rain. High 90°, low 62°.

Pressure29.85 inHg
Wind8.9 mph W
Humidity24%
Visibility—
Dew point42°
Fri, 2185° / 56°0.08Light rain
85 °Light rain

Grantsdale, Friday, 21 August

Light rain. High 85°, low 56°.

Pressure29.91 inHg
Wind6 mph W
Humidity26%
Visibility—
Dew point40°
Sat, 2290° / 58°0Clear
90 °Clear

Grantsdale, Saturday, 22 August

Clear. High 90°, low 58°.

Pressure29.88 inHg
Wind7.3 mph W
Humidity19%
Visibility—
Dew point35°
Sun, 2390° / 62°0Overcast
90 °Overcast

Grantsdale, Sunday, 23 August

Overcast. High 90°, low 62°.

Pressure29.80 inHg
Wind11 mph W
Humidity15%
Visibility—
Dew point31°

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 Grantsdale, 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 Grantsdale, 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.