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As of 13:25 MDT

Weather in Big Arm, MT

80°Current weather

Big Arm, Saturday, 8 August, 13:25

Mostly clear. Feels like 81°. High 88°, low 53°.

Pressure29.88 inHg
Wind2.2 mph SW
Humidity46%
Visibility6.2 mi
Dew point58°
Sun, 0987° / 54°0Clear
87 °Clear

Big Arm, Sunday, 9 August

Clear. High 87°, low 54°.

Pressure29.91 inHg
Wind4.9 mph NE
Humidity23%
Visibility6.2 mi
Dew point36°
Mon, 1090° / 51°0Clear
90 °Clear

Big Arm, Monday, 10 August

Clear. High 90°, low 51°.

Pressure29.85 inHg
Wind2.8 mph SE
Humidity20%
Visibility6.2 mi
Dew point35°
Tue, 1185° / 56°0Clear
85 °Clear

Big Arm, Tuesday, 11 August

Clear. High 85°, low 56°.

Pressure29.97 inHg
Wind3.3 mph E
Humidity25%
Visibility6.2 mi
Dew point38°
Wed, 1283° / 56°0Partly cloudy
83 °Partly cloudy

Big Arm, Wednesday, 12 August

Partly cloudy. High 83°, low 56°.

Pressure29.88 inHg
Wind4.9 mph NE
Humidity26%
Visibility6.2 mi
Dew point38°
Thu, 1387° / 56°0Clear
87 °Clear

Big Arm, Thursday, 13 August

Clear. High 87°, low 56°.

Pressure29.85 inHg
Wind8 mph NE
Humidity44%
Visibility—
Dew point49°
Fri, 1483° / 53°0Mostly clear
83 °Mostly clear

Big Arm, Friday, 14 August

Mostly clear. High 83°, low 53°.

Pressure29.94 inHg
Wind6.9 mph E
Humidity23%
Visibility—
Dew point31°
Sat, 1581° / 56°0Overcast
81 °Overcast

Big Arm, Saturday, 15 August

Overcast. High 81°, low 56°.

Pressure29.97 inHg
Wind8.1 mph SW
Humidity43%
Visibility—
Dew point46°
Sun, 1686° / 54°0.01Light rain
86 °Light rain

Big Arm, Sunday, 16 August

Light rain. High 86°, low 54°.

Pressure30.00 inHg
Wind4.1 mph N
Humidity30%
Visibility—
Dew point42°
Mon, 1789° / 56°0Mostly clear
89 °Mostly clear

Big Arm, Monday, 17 August

Mostly clear. High 89°, low 56°.

Pressure30.03 inHg
Wind6.8 mph SE
Humidity35%
Visibility—
Dew point46°
Tue, 1869° / 58°0.15Light rain
69 °Light rain

Big Arm, Tuesday, 18 August

Light rain. High 69°, low 58°.

Pressure30.06 inHg
Wind7 mph SW
Humidity54%
Visibility—
Dew point51°
Wed, 1979° / 52°0Partly cloudy
79 °Partly cloudy

Big Arm, Wednesday, 19 August

Partly cloudy. High 79°, low 52°.

Pressure30.09 inHg
Wind5.3 mph E
Humidity49%
Visibility—
Dew point49°
Thu, 2089° / 59°0Overcast
89 °Overcast

Big Arm, Thursday, 20 August

Overcast. High 89°, low 59°.

Pressure29.91 inHg
Wind6 mph SE
Humidity23%
Visibility—
Dew point38°
Fri, 2190° / 61°0Clear
90 °Clear

Big Arm, Friday, 21 August

Clear. High 90°, low 61°.

Pressure29.97 inHg
Wind5.9 mph E
Humidity28%
Visibility—
Dew point42°
Sat, 2288° / 61°0Mostly clear
88 °Mostly clear

Big Arm, Saturday, 22 August

Mostly clear. High 88°, low 61°.

Pressure29.97 inHg
Wind6.3 mph E
Humidity30%
Visibility—
Dew point44°
Sun, 2389° / 60°0Partly cloudy
89 °Partly cloudy

Big Arm, Sunday, 23 August

Partly cloudy. High 89°, low 60°.

Pressure30.00 inHg
Wind7 mph N
Humidity35%
Visibility—
Dew point48°

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 Big Arm, 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 Big Arm, 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.