As of 22:23 MDT

Weather in Dean, MT

42°

Dean, Saturday, 10 October, 22:23

Overcast. Feels like 38°. High 55°, low 41°.

Pressure29.80 inHg

Wind6.1 mph E

Humidity89%

Visibility4.1 mi

Dew point39°

See detailed hourly forecast

Monthly outlook for Dean, MT: average high 53.5°, average low 37.4°. That is 2.1° above the climate normal for October. Precipitation is expected on 3 days (about 1.4 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 19 October (63.2°), the coolest 14 October (22.9°).

53.5°/37.4°

Average high / low

+2.1°

Above normal

3 / 5

Wet days / normal

1.4 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
10 October – 19 October	50.3°	50.5°	-0.1°
20 October – 29 October	58.7°	47.2°	+6.4°
30 October – 8 November	at normal	41.4°	—

October records over 66 years

78.4°1 October 2011All-time high

-14.6°30 October 1991All-time low

Climate normals and records are computed from the nearest reference point — Alpine (14 mi).

Sun, 1142° / 29°

1.17

42 °

Dean, Sunday, 11 October

Snow. High 42°, low 29°.

Pressure29.97 inHg

Wind2.3 mph NE

Humidity94%

Visibility0.8 mi

Dew point31°

Mon, 1233° / 27°

0.16

33 °

Dean, Monday, 12 October

Snow. High 33°, low 27°.

Pressure30.15 inHg

Wind2.9 mph SE

Humidity97%

Visibility6.2 mi

Dew point27°

Tue, 1343° / 25°

43 °

Dean, Tuesday, 13 October

Overcast. High 43°, low 25°.

Pressure30.00 inHg

Wind1.9 mph E

Humidity71%

Visibility6.2 mi

Dew point32°

Wed, 1444° / 23°

44 °

Dean, Wednesday, 14 October

Clear. High 44°, low 23°.

Pressure30.21 inHg

Wind2.3 mph NE

Humidity59%

Visibility6.2 mi

Dew point26°

Thu, 1551° / 28°

51 °

Dean, Thursday, 15 October

Clear. High 51°, low 28°.

Pressure30.47 inHg

Wind5.3 mph SW

Humidity47%

Visibility—

Dew point27°

Fri, 1651° / 28°

51 °

Dean, Friday, 16 October

Mostly clear. High 51°, low 28°.

Pressure30.42 inHg

Wind5.8 mph SW

Humidity50%

Visibility—

Dew point28°

Sat, 1759° / 39°

59 °

Dean, Saturday, 17 October

Partly cloudy. High 59°, low 39°.

Pressure30.12 inHg

Wind15.4 mph SW

Humidity42%

Visibility—

Dew point32°

Sun, 1862° / 45°

62 °

Dean, Sunday, 18 October

Overcast. High 62°, low 45°.

Pressure30.06 inHg

Wind14.5 mph SW

Humidity38%

Visibility—

Dew point33°

Mon, 1963° / 47°

63 °

Dean, Monday, 19 October

Clear. High 63°, low 47°.

Pressure30.03 inHg

Wind13.8 mph SW

Humidity29%

Visibility—

Dew point28°

Tue, 2062° / 47°

62 °

Dean, Tuesday, 20 October

Partly cloudy. High 62°, low 47°.

Pressure29.88 inHg

Wind13.6 mph SW

Humidity27%

Visibility—

Dew point25°

Wed, 2151° / 40°

51 °

Dean, Wednesday, 21 October

Overcast. High 51°, low 40°.

Pressure30.12 inHg

Wind6.2 mph E

Humidity33%

Visibility—

Dew point20°

Thu, 2258° / 41°

58 °

Dean, Thursday, 22 October

Partly cloudy. High 58°, low 41°.

Pressure30.12 inHg

Wind5.7 mph SW

Humidity35%

Visibility—

Dew point26°

Fri, 2359° / 45°

59 °

Dean, Friday, 23 October

Mostly clear. High 59°, low 45°.

Pressure30.15 inHg

Wind6.1 mph SW

Humidity34%

Visibility—

Dew point27°

Sat, 2460° / 46°

60 °

Dean, Saturday, 24 October

Clear. High 60°, low 46°.

Pressure30.06 inHg

Wind8.1 mph SW

Humidity33%

Visibility—

Dew point27°

Sun, 2563° / 47°

63 °

Dean, Sunday, 25 October

Overcast. High 63°, low 47°.

Pressure29.94 inHg

Wind12.1 mph SW

Humidity18%

Visibility—

Dew point16°

From day 17 onward the outlook is built from 60-year climate statistics

Mon, 2646° / 27°

0.11

46 °

Dean, Monday, 26 October

Climate normal for this date — 60-year average.

Average high46°

Average low27°

Average precipitation0.11 in

Chance of precipitation38%

Record high63° (1999)

Record low4° (2023)

Tue, 2746° / 26°

0.08

46 °

Dean, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high46°

Average low26°

Average precipitation0.08 in

Chance of precipitation30%

Record high65° (2016)

Record low3° (2019)

Wed, 2845° / 27°

0.1

45 °

Dean, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high45°

Average low27°

Average precipitation0.1 in

Chance of precipitation38%

Record high64° (1962)

Record low1° (2019)

Thu, 2942° / 25°

0.11

42 °

Dean, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high42°

Average low25°

Average precipitation0.11 in

Chance of precipitation45%

Record high64° (1962)

Record low-14° (1971)

Fri, 3042° / 22°

0.08

42 °

Dean, Friday, 30 October

Climate normal for this date — 60-year average.

Average high42°

Average low22°

Average precipitation0.08 in

Chance of precipitation33%

Record high64° (1962)

Record low-15° (1991)

Sat, 3142° / 24°

0.1

42 °

Dean, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high42°

Average low24°

Average precipitation0.1 in

Chance of precipitation42%

Record high61° (2014)

Record low-7° (2006)

Sun, 0142° / 23°

0.09

42 °

Dean, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high42°

Average low23°

Average precipitation0.09 in

Chance of precipitation35%

Record high61° (2025)

Record low-7° (2006)

Mon, 0241° / 23°

0.07

41 °

Dean, Monday, 2 November

Climate normal for this date — 60-year average.

Average high41°

Average low23°

Average precipitation0.07 in

Chance of precipitation37%

Record high60° (1981)

Record low-17° (1991)

Tue, 0342° / 24°

0.07

42 °

Dean, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high42°

Average low24°

Average precipitation0.07 in

Chance of precipitation32%

Record high63° (1962)

Record low-7° (1967)

Wed, 0443° / 24°

0.07

43 °

Dean, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high43°

Average low24°

Average precipitation0.07 in

Chance of precipitation28%

Record high60° (2016)

Record low-6° (1973)

Thu, 0542° / 24°

0.09

42 °

Dean, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high42°

Average low24°

Average precipitation0.09 in

Chance of precipitation42%

Record high61° (2010)

Record low-12° (2003)

Fri, 0641° / 23°

0.08

41 °

Dean, Friday, 6 November

Climate normal for this date — 60-year average.

Average high41°

Average low23°

Average precipitation0.08 in

Chance of precipitation37%

Record high61° (2010)

Record low-5° (2003)

Sat, 0741° / 23°

0.1

41 °

Dean, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high41°

Average low23°

Average precipitation0.1 in

Chance of precipitation52%

Record high60° (1999)

Record low-1° (1990)

Sun, 0840° / 22°

0.09

40 °

Dean, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high40°

Average low22°

Average precipitation0.09 in

Chance of precipitation40%

Record high61° (2016)

Record low0° (1966)

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 Dean, 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 Dean, 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.