As of 15:29 MDT

Weather in Garrison, MT

40°

Garrison, Saturday, 10 October, 15:29

Overcast. Feels like 34°. High 50°, low 32°.

Pressure29.74 inHg

Wind8.3 mph E

Humidity85%

Visibility5.1 mi

Dew point36°

See detailed hourly forecast

Sun, 1137° / 26°

0.34

37 °

Garrison, Sunday, 11 October

Snow. High 37°, low 26°.

Pressure30.00 inHg

Wind6.3 mph E

Humidity95%

Visibility6.2 mi

Dew point25°

Mon, 1238° / 24°

0.11

38 °

Garrison, Monday, 12 October

Snow. High 38°, low 24°.

Pressure30.12 inHg

Wind4.5 mph E

Humidity90%

Visibility6.2 mi

Dew point26°

Tue, 1344° / 26°

44 °

Garrison, Tuesday, 13 October

Clear. High 44°, low 26°.

Pressure30.15 inHg

Wind2.8 mph W

Humidity74%

Visibility6.2 mi

Dew point27°

Wed, 1449° / 27°

49 °

Garrison, Wednesday, 14 October

Clear. High 49°, low 27°.

Pressure30.24 inHg

Wind0.9 mph SW

Humidity59%

Visibility6.2 mi

Dew point21°

Thu, 1555° / 33°

55 °

Garrison, Thursday, 15 October

Clear. High 55°, low 33°.

Pressure30.50 inHg

Wind7.7 mph E

Humidity52%

Visibility—

Dew point30°

Fri, 1648° / 32°

48 °

Garrison, Friday, 16 October

Overcast. High 48°, low 32°.

Pressure30.59 inHg

Wind6.4 mph E

Humidity53%

Visibility—

Dew point25°

Sat, 1757° / 33°

57 °

Garrison, Saturday, 17 October

Partly cloudy. High 57°, low 33°.

Pressure30.24 inHg

Wind4.4 mph S

Humidity36%

Visibility—

Dew point22°

Sun, 1866° / 41°

66 °

Garrison, Sunday, 18 October

Overcast. High 66°, low 41°.

Pressure30.03 inHg

Wind11.9 mph W

Humidity30%

Visibility—

Dew point25°

Mon, 1967° / 44°

67 °

Garrison, Monday, 19 October

Overcast. High 67°, low 44°.

Pressure30.06 inHg

Wind7.5 mph W

Humidity33%

Visibility—

Dew point28°

Tue, 2055° / 41°

0.03

55 °

Garrison, Tuesday, 20 October

Light rain. High 55°, low 41°.

Pressure29.94 inHg

Wind20.3 mph W

Humidity49%

Visibility—

Dew point33°

Wed, 2151° / 39°

51 °

Garrison, Wednesday, 21 October

Overcast. High 51°, low 39°.

Pressure30.18 inHg

Wind12.3 mph NW

Humidity58%

Visibility—

Dew point32°

Thu, 2259° / 34°

59 °

Garrison, Thursday, 22 October

Mostly clear. High 59°, low 34°.

Pressure30.39 inHg

Wind4.2 mph S

Humidity33%

Visibility—

Dew point22°

Fri, 2370° / 44°

70 °

Garrison, Friday, 23 October

Overcast. High 70°, low 44°.

Pressure30.15 inHg

Wind4.5 mph S

Humidity28%

Visibility—

Dew point26°

Sat, 2473° / 49°

73 °

Garrison, Saturday, 24 October

Overcast. High 73°, low 49°.

Pressure30.00 inHg

Wind5.4 mph S

Humidity28%

Visibility—

Dew point29°

Sun, 2570° / 50°

70 °

Garrison, Sunday, 25 October

Overcast. High 70°, low 50°.

Pressure30.06 inHg

Wind3.3 mph S

Humidity30%

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 Garrison, 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 Garrison, 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.