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As of 23:59 MDT

Weather in Sioux Pass, MT

59°Current weather

Sioux Pass, Saturday, 17 October, 23:59

Partly cloudy. Feels like 56°. High 73°, low 38°.

Pressure29.85 inHg
Wind12.5 mph W
Humidity43%
Visibility6.2 mi
Dew point36°
Sun, 1860° / 32°0Clear
60 °Clear

Sioux Pass, Sunday, 18 October

Clear. High 60°, low 32°.

Pressure30.18 inHg
Wind6.5 mph NW
Humidity39%
Visibility6.2 mi
Dew point31°
Mon, 1962° / 35°0Clear
62 °Clear

Sioux Pass, Monday, 19 October

Clear. High 62°, low 35°.

Pressure30.15 inHg
Wind14.9 mph SE
Humidity43%
Visibility6.2 mi
Dew point34°
Tue, 2061° / 41°0Overcast
61 °Overcast

Sioux Pass, Tuesday, 20 October

Overcast. High 61°, low 41°.

Pressure30.03 inHg
Wind2.3 mph N
Humidity65%
Visibility6.2 mi
Dew point45°
Wed, 2160° / 39°0Clear
60 °Clear

Sioux Pass, Wednesday, 21 October

Clear. High 60°, low 39°.

Pressure30.21 inHg
Wind8.3 mph SE
Humidity66%
Visibility6.2 mi
Dew point44°
Thu, 2269° / 49°0Mostly clear
69 °Mostly clear

Sioux Pass, Thursday, 22 October

Mostly clear. High 69°, low 49°.

Pressure29.91 inHg
Wind13.2 mph SE
Humidity66%
Visibility—
Dew point50°
Fri, 2364° / 44°0.37Light rain
64 °Light rain

Sioux Pass, Friday, 23 October

Light rain. High 64°, low 44°.

Pressure29.62 inHg
Wind18.1 mph N
Humidity68%
Visibility—
Dew point52°
Sat, 2447° / 39°0.06Light rain
47 °Light rain

Sioux Pass, Saturday, 24 October

Light rain. High 47°, low 39°.

Pressure30.45 inHg
Wind19.1 mph N
Humidity41%
Visibility—
Dew point22°
Sun, 2556° / 34°0Partly cloudy
56 °Partly cloudy

Sioux Pass, Sunday, 25 October

Partly cloudy. High 56°, low 34°.

Pressure30.30 inHg
Wind16.6 mph S
Humidity37%
Visibility—
Dew point21°
Mon, 2662° / 41°0Overcast
62 °Overcast

Sioux Pass, Monday, 26 October

Overcast. High 62°, low 41°.

Pressure30.03 inHg
Wind9.7 mph S
Humidity32%
Visibility—
Dew point25°
Tue, 2762° / 43°0Clear
62 °Clear

Sioux Pass, Tuesday, 27 October

Clear. High 62°, low 43°.

Pressure29.68 inHg
Wind12.8 mph S
Humidity31%
Visibility—
Dew point26°
Wed, 2860° / 45°0Overcast
60 °Overcast

Sioux Pass, Wednesday, 28 October

Overcast. High 60°, low 45°.

Pressure29.59 inHg
Wind12.4 mph W
Humidity30%
Visibility—
Dew point24°
Thu, 2950° / 42°0Clear
50 °Clear

Sioux Pass, Thursday, 29 October

Clear. High 50°, low 42°.

Pressure29.77 inHg
Wind26.3 mph NW
Humidity42%
Visibility—
Dew point25°
Fri, 3063° / 41°0Mostly clear
63 °Mostly clear

Sioux Pass, Friday, 30 October

Mostly clear. High 63°, low 41°.

Pressure29.53 inHg
Wind17.7 mph S
Humidity32%
Visibility—
Dew point27°
Sat, 3149° / 42°0.01Light rain
49 °Light rain

Sioux Pass, Saturday, 31 October

Light rain. High 49°, low 42°.

Pressure29.53 inHg
Wind19.1 mph NW
Humidity43%
Visibility—
Dew point25°
Sun, 0159° / 40°0.01Light rain
59 °Light rain

Sioux Pass, Sunday, 1 November

Light rain. High 59°, low 40°.

Pressure29.50 inHg
Wind23.9 mph W
Humidity31%
Visibility—
Dew point24°

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 Sioux Pass, 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 Sioux Pass, 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.