As of 06:40 MDT

Weather in Sioux Pass, MT

45°

Sioux Pass, Saturday, 17 October, 06:40

Clear. Feels like 40°. High 74°, low 40°.

Pressure30.00 inHg

Wind9.8 mph SW

Humidity59%

Visibility6.2 mi

Dew point32°

See detailed hourly forecast

Sun, 1858° / 41°

58 °

Sioux Pass, Sunday, 18 October

Clear. High 58°, low 41°.

Pressure30.15 inHg

Wind7.3 mph NW

Humidity38%

Visibility6.2 mi

Dew point30°

Mon, 1963° / 39°

63 °

Sioux Pass, Monday, 19 October

Clear. High 63°, low 39°.

Pressure30.09 inHg

Wind15.2 mph SE

Humidity45%

Visibility6.2 mi

Dew point36°

Tue, 2061° / 43°

61 °

Sioux Pass, Tuesday, 20 October

Overcast. High 61°, low 43°.

Pressure30.00 inHg

Wind2.6 mph E

Humidity68%

Visibility6.2 mi

Dew point47°

Wed, 2157° / 40°

57 °

Sioux Pass, Wednesday, 21 October

Overcast. High 57°, low 40°.

Pressure30.24 inHg

Wind9.3 mph SE

Humidity71%

Visibility—

Dew point43°

Thu, 2269° / 48°

69 °

Sioux Pass, Thursday, 22 October

Clear. High 69°, low 48°.

Pressure29.91 inHg

Wind12.2 mph SE

Humidity65%

Visibility—

Dew point49°

Fri, 2363° / 55°

0.27

63 °

Sioux Pass, Friday, 23 October

Light rain. High 63°, low 55°.

Pressure29.41 inHg

Wind17.3 mph N

Humidity80%

Visibility—

Dew point55°

Sat, 2453° / 36°

0.4

53 °

Sioux Pass, Saturday, 24 October

Snow. High 53°, low 36°.

Pressure30.06 inHg

Wind25.9 mph NW

Humidity94%

Visibility—

Dew point36°

Sun, 2545° / 31°

45 °

Sioux Pass, Sunday, 25 October

Clear. High 45°, low 31°.

Pressure30.33 inHg

Wind7.7 mph SE

Humidity46%

Visibility—

Dew point21°

Mon, 2652° / 35°

52 °

Sioux Pass, Monday, 26 October

Overcast. High 52°, low 35°.

Pressure30.03 inHg

Wind12.6 mph S

Humidity42%

Visibility—

Dew point23°

Tue, 2756° / 39°

56 °

Sioux Pass, Tuesday, 27 October

Overcast. High 56°, low 39°.

Pressure29.74 inHg

Wind6.7 mph SE

Humidity39%

Visibility—

Dew point26°

Wed, 2853° / 42°

53 °

Sioux Pass, Wednesday, 28 October

Overcast. High 53°, low 42°.

Pressure29.80 inHg

Wind14.9 mph W

Humidity56%

Visibility—

Dew point33°

Thu, 2962° / 39°

62 °

Sioux Pass, Thursday, 29 October

Overcast. High 62°, low 39°.

Pressure29.74 inHg

Wind13.5 mph S

Humidity30%

Visibility—

Dew point22°

Fri, 3049° / 40°

49 °

Sioux Pass, Friday, 30 October

Overcast. High 49°, low 40°.

Pressure29.65 inHg

Wind14.7 mph W

Humidity43%

Visibility—

Dew point25°

Sat, 3146° / 36°

46 °

Sioux Pass, Saturday, 31 October

Overcast. High 46°, low 36°.

Pressure29.77 inHg

Wind22.4 mph NW

Humidity50%

Visibility—

Dew point26°

Sun, 0149° / 34°

49 °

Sioux Pass, Sunday, 1 November

Clear. High 49°, low 34°.

Pressure29.91 inHg

Wind12.7 mph W

Humidity43%

Visibility—

Dew point22°

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.