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As of 11:57 MDT

Weather in Arnold, MT

66°Current weather

Arnold, Wednesday, 7 October, 11:57

Partly cloudy. Feels like 64°. High 76°, low 39°.

Pressure30.12 inHg
Wind0 mph N
Humidity26%
Visibility6.2 mi
Dew point31°
Thu, 0878° / 39°0Partly cloudy
78 °Partly cloudy

Arnold, Thursday, 8 October

Partly cloudy. High 78°, low 39°.

Pressure30.03 inHg
Wind1.6 mph E
Humidity31%
Visibility6.2 mi
Dew point35°
Fri, 0979° / 44°0Mostly clear
79 °Mostly clear

Arnold, Friday, 9 October

Mostly clear. High 79°, low 44°.

Pressure29.56 inHg
Wind6.3 mph S
Humidity23%
Visibility6.2 mi
Dew point34°
Sat, 1056° / 36°0.28Snow
56 °Snow

Arnold, Saturday, 10 October

Snow. High 56°, low 36°.

Pressure29.56 inHg
Wind11.2 mph N
Humidity52%
Visibility5.4 mi
Dew point38°
Sun, 1135° / 31°0.55Snow
35 °Snow

Arnold, Sunday, 11 October

Snow. High 35°, low 31°.

Pressure30.09 inHg
Wind11.1 mph N
Humidity86%
Visibility—
Dew point31°
Mon, 1234° / 28°0.09Light snow
34 °Light snow

Arnold, Monday, 12 October

Light snow. High 34°, low 28°.

Pressure30.27 inHg
Wind4.6 mph SE
Humidity92%
Visibility—
Dew point29°
Tue, 1337° / 25°0Overcast
37 °Overcast

Arnold, Tuesday, 13 October

Overcast. High 37°, low 25°.

Pressure30.09 inHg
Wind3.7 mph SE
Humidity100%
Visibility—
Dew point32°
Wed, 1441° / 33°0.35Snow
41 °Snow

Arnold, Wednesday, 14 October

Snow. High 41°, low 33°.

Pressure29.62 inHg
Wind13.7 mph NW
Humidity100%
Visibility—
Dew point40°
Thu, 1537° / 30°0.06Snow
37 °Snow

Arnold, Thursday, 15 October

Snow. High 37°, low 30°.

Pressure30.33 inHg
Wind10.6 mph NW
Humidity68%
Visibility—
Dew point25°
Fri, 1641° / 24°0Mostly clear
41 °Mostly clear

Arnold, Friday, 16 October

Mostly clear. High 41°, low 24°.

Pressure30.45 inHg
Wind5.7 mph SE
Humidity58%
Visibility—
Dew point22°
Sat, 1746° / 24°0Clear
46 °Clear

Arnold, Saturday, 17 October

Clear. High 46°, low 24°.

Pressure30.24 inHg
Wind5.4 mph S
Humidity46%
Visibility—
Dew point19°
Sun, 1853° / 29°0Clear
53 °Clear

Arnold, Sunday, 18 October

Clear. High 53°, low 29°.

Pressure30.09 inHg
Wind5.1 mph S
Humidity43%
Visibility—
Dew point22°
Mon, 1960° / 33°0Clear
60 °Clear

Arnold, Monday, 19 October

Clear. High 60°, low 33°.

Pressure29.94 inHg
Wind7.4 mph S
Humidity38%
Visibility—
Dew point24°
Tue, 2053° / 36°0Mostly clear
53 °Mostly clear

Arnold, Tuesday, 20 October

Mostly clear. High 53°, low 36°.

Pressure30.24 inHg
Wind5.3 mph S
Humidity44%
Visibility—
Dew point26°
Wed, 2156° / 35°0Clear
56 °Clear

Arnold, Wednesday, 21 October

Clear. High 56°, low 35°.

Pressure30.18 inHg
Wind4.1 mph S
Humidity44%
Visibility—
Dew point27°
Thu, 2260° / 37°0Clear
60 °Clear

Arnold, Thursday, 22 October

Clear. High 60°, low 37°.

Pressure30.06 inHg
Wind5.4 mph S
Humidity37%
Visibility—
Dew point25°

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 Arnold, 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 Arnold, 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.