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As of 21:46 MDT

Weather in Chestnut, MT

57°Current weather

Chestnut, Thursday, 8 October, 21:46

Overcast. Feels like 54°. High 71°, low 35°.

Pressure29.91 inHg
Wind0.8 mph SE
Humidity33%
Visibility6.2 mi
Dew point29°
Fri, 0976° / 35°0Mostly clear
76 °Mostly clear

Chestnut, Friday, 9 October

Mostly clear. High 76°, low 35°.

Pressure29.62 inHg
Wind14.2 mph W
Humidity23%
Visibility6.2 mi
Dew point27°
Sat, 1056° / 34°0.71Snow
56 °Snow

Chestnut, Saturday, 10 October

Snow. High 56°, low 34°.

Pressure29.56 inHg
Wind1.2 mph SE
Humidity59%
Visibility6.2 mi
Dew point41°
Sun, 1133° / 28°0.76Snow
33 °Snow

Chestnut, Sunday, 11 October

Snow. High 33°, low 28°.

Pressure30.00 inHg
Wind12.1 mph E
Humidity96%
Visibility1.1 mi
Dew point26°
Mon, 1233° / 22°0.43Snow
33 °Snow

Chestnut, Monday, 12 October

Snow. High 33°, low 22°.

Pressure30.06 inHg
Wind0.9 mph NW
Humidity86%
Visibility6.2 mi
Dew point25°
Tue, 1338° / 20°0Mostly clear
38 °Mostly clear

Chestnut, Tuesday, 13 October

Mostly clear. High 38°, low 20°.

Pressure30.09 inHg
Wind2.4 mph W
Humidity76%
Visibility—
Dew point28°
Wed, 1438° / 27°0Overcast
38 °Overcast

Chestnut, Wednesday, 14 October

Overcast. High 38°, low 27°.

Pressure30.00 inHg
Wind4.9 mph W
Humidity78%
Visibility—
Dew point30°
Thu, 1535° / 25°0.44Snow
35 °Snow

Chestnut, Thursday, 15 October

Snow. High 35°, low 25°.

Pressure30.39 inHg
Wind6 mph N
Humidity85%
Visibility—
Dew point28°
Fri, 1636° / 18°0Partly cloudy
36 °Partly cloudy

Chestnut, Friday, 16 October

Partly cloudy. High 36°, low 18°.

Pressure30.62 inHg
Wind3.4 mph SW
Humidity80%
Visibility—
Dew point24°
Sat, 1745° / 27°0Partly cloudy
45 °Partly cloudy

Chestnut, Saturday, 17 October

Partly cloudy. High 45°, low 27°.

Pressure30.27 inHg
Wind5.2 mph S
Humidity76%
Visibility—
Dew point34°
Sun, 1845° / 31°0Overcast
45 °Overcast

Chestnut, Sunday, 18 October

Overcast. High 45°, low 31°.

Pressure30.36 inHg
Wind5.3 mph E
Humidity65%
Visibility—
Dew point29°
Mon, 1954° / 32°0Clear
54 °Clear

Chestnut, Monday, 19 October

Clear. High 54°, low 32°.

Pressure30.06 inHg
Wind5 mph S
Humidity56%
Visibility—
Dew point33°
Tue, 2055° / 35°0Clear
55 °Clear

Chestnut, Tuesday, 20 October

Clear. High 55°, low 35°.

Pressure30.06 inHg
Wind5.1 mph S
Humidity46%
Visibility—
Dew point29°
Wed, 2151° / 36°0Overcast
51 °Overcast

Chestnut, Wednesday, 21 October

Overcast. High 51°, low 36°.

Pressure30.15 inHg
Wind4.7 mph S
Humidity45%
Visibility—
Dew point27°
Thu, 2257° / 35°0Clear
57 °Clear

Chestnut, Thursday, 22 October

Clear. High 57°, low 35°.

Pressure30.24 inHg
Wind4.9 mph S
Humidity38%
Visibility—
Dew point26°
Fri, 2360° / 37°0Clear
60 °Clear

Chestnut, Friday, 23 October

Clear. High 60°, low 37°.

Pressure30.00 inHg
Wind6.4 mph S
Humidity33%
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 Chestnut, 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 Chestnut, 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.