As of 05:15 MDT

Weather in Sweet Grass, MT

48°

Sweet Grass, Friday, 23 October, 05:15

Overcast. Feels like 41°. High 48°, low 24°.

Pressure29.65 inHg

Wind18.4 mph NW

Humidity76%

Visibility6.2 mi

Dew point40°

See detailed hourly forecast

Monthly outlook for Sweet Grass, MT: average high 45.6°, average low 30.1°. That is 0.9° below the climate normal for October. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 4 November (54.6°), the coolest 24 October (19°).

45.6°/30.1°

Average high / low

−0.9°

Below normal

1 / 3

Wet days / normal

0.3 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
23 October – 1 November	42.8°	48.7°	-3.3°
2 November – 11 November	50.4°	43°	+4.1°
12 November – 21 November	at normal	39.5°	—

October records over 66 years

84.4°1 October 1992All-time high

-13.2°30 October 1991All-time low

Climate normals and records are computed from the nearest reference point — Sunburst (8 mi).

Sat, 2445° / 19°

45 °

Sweet Grass, Saturday, 24 October

Partly cloudy. High 45°, low 19°.

Pressure30.36 inHg

Wind3.8 mph E

Humidity71%

Visibility6.2 mi

Dew point21°

Sun, 2541° / 26°

41 °

Sweet Grass, Sunday, 25 October

Overcast. High 41°, low 26°.

Pressure30.50 inHg

Wind3.4 mph E

Humidity79%

Visibility6.2 mi

Dew point23°

Mon, 2644° / 28°

44 °

Sweet Grass, Monday, 26 October

Overcast. High 44°, low 28°.

Pressure30.27 inHg

Wind9.6 mph SE

Humidity71%

Visibility6.2 mi

Dew point25°

Tue, 2743° / 30°

43 °

Sweet Grass, Tuesday, 27 October

Overcast. High 43°, low 30°.

Pressure30.09 inHg

Wind11.4 mph NW

Humidity66%

Visibility—

Dew point30°

Wed, 2847° / 31°

47 °

Sweet Grass, Wednesday, 28 October

Clear. High 47°, low 31°.

Pressure30.39 inHg

Wind10.1 mph NW

Humidity55%

Visibility—

Dew point27°

Thu, 2938° / 24°

38 °

Sweet Grass, Thursday, 29 October

Clear. High 38°, low 24°.

Pressure30.24 inHg

Wind7.6 mph S

Humidity49%

Visibility—

Dew point17°

Fri, 3035° / 25°

35 °

Sweet Grass, Friday, 30 October

Clear. High 35°, low 25°.

Pressure30.18 inHg

Wind18.3 mph S

Humidity52%

Visibility—

Dew point16°

Sat, 3144° / 25°

44 °

Sweet Grass, Saturday, 31 October

Clear. High 44°, low 25°.

Pressure30.06 inHg

Wind10.9 mph S

Humidity47%

Visibility—

Dew point19°

Sun, 0143° / 31°

43 °

Sweet Grass, Sunday, 1 November

Clear. High 43°, low 31°.

Pressure30.21 inHg

Wind6.7 mph SW

Humidity40%

Visibility—

Dew point17°

Mon, 0247° / 33°

47 °

Sweet Grass, Monday, 2 November

Clear. High 47°, low 33°.

Pressure30.30 inHg

Wind10.6 mph S

Humidity30%

Visibility—

Dew point13°

Tue, 0347° / 33°

47 °

Sweet Grass, Tuesday, 3 November

Clear. High 47°, low 33°.

Pressure30.24 inHg

Wind13.3 mph S

Humidity39%

Visibility—

Dew point18°

Wed, 0455° / 34°

55 °

Sweet Grass, Wednesday, 4 November

Clear. High 55°, low 34°.

Pressure30.00 inHg

Wind14 mph SW

Humidity34%

Visibility—

Dew point18°

Thu, 0553° / 42°

53 °

Sweet Grass, Thursday, 5 November

Overcast. High 53°, low 42°.

Pressure29.74 inHg

Wind16.3 mph W

Humidity50%

Visibility—

Dew point32°

Fri, 0652° / 41°

52 °

Sweet Grass, Friday, 6 November

Overcast. High 52°, low 41°.

Pressure29.97 inHg

Wind18 mph NW

Humidity55%

Visibility—

Dew point32°

Sat, 0748° / 37°

48 °

Sweet Grass, Saturday, 7 November

Partly cloudy. High 48°, low 37°.

Pressure30.30 inHg

Wind9.4 mph W

Humidity55%

Visibility—

Dew point28°

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

Sun, 0842° / 26°

0.04

42 °

Sweet Grass, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high42°

Average low26°

Average precipitation0.04 in

Chance of precipitation20%

Record high62° (2004)

Record low-5° (2022)

Mon, 0940° / 24°

0.06

40 °

Sweet Grass, Monday, 9 November

Climate normal for this date — 60-year average.

Average high40°

Average low24°

Average precipitation0.06 in

Chance of precipitation30%

Record high66° (2016)

Record low-10° (2022)

Tue, 1039° / 24°

0.03

39 °

Sweet Grass, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high39°

Average low24°

Average precipitation0.03 in

Chance of precipitation25%

Record high62° (2025)

Record low-2° (1978)

Wed, 1140° / 22°

0.02

40 °

Sweet Grass, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high40°

Average low22°

Average precipitation0.02 in

Chance of precipitation23%

Record high61° (1990)

Record low-19° (1978)

Thu, 1241° / 24°

0.02

41 °

Sweet Grass, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high41°

Average low24°

Average precipitation0.02 in

Chance of precipitation12%

Record high68° (1990)

Record low-11° (2014)

Fri, 1342° / 25°

0.01

42 °

Sweet Grass, Friday, 13 November

Climate normal for this date — 60-year average.

Average high42°

Average low25°

Average precipitation0.01 in

Chance of precipitation8%

Record high65° (2025)

Record low-18° (2014)

Sat, 1442° / 25°

0.02

42 °

Sweet Grass, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high42°

Average low25°

Average precipitation0.02 in

Chance of precipitation13%

Record high65° (1999)

Record low-18° (2014)

Sun, 1542° / 25°

0.01

42 °

Sweet Grass, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high42°

Average low25°

Average precipitation0.01 in

Chance of precipitation10%

Record high61° (2001)

Record low-5° (2014)

Mon, 1642° / 26°

0.04

42 °

Sweet Grass, Monday, 16 November

Climate normal for this date — 60-year average.

Average high42°

Average low26°

Average precipitation0.04 in

Chance of precipitation17%

Record high58° (2001)

Record low0° (1965)

Tue, 1739° / 23°

0.04

39 °

Sweet Grass, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high39°

Average low23°

Average precipitation0.04 in

Chance of precipitation25%

Record high60° (1976)

Record low-2° (2022)

Wed, 1838° / 24°

0.03

38 °

Sweet Grass, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high38°

Average low24°

Average precipitation0.03 in

Chance of precipitation20%

Record high61° (2008)

Record low-4° (1978)

Thu, 1937° / 22°

0.02

37 °

Sweet Grass, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high37°

Average low22°

Average precipitation0.02 in

Chance of precipitation15%

Record high53° (2003)

Record low-13° (1985)

Fri, 2037° / 22°

0.02

37 °

Sweet Grass, Friday, 20 November

Climate normal for this date — 60-year average.

Average high37°

Average low22°

Average precipitation0.02 in

Chance of precipitation18%

Record high58° (2002)

Record low-18° (1985)

Sat, 2136° / 20°

0.02

36 °

Sweet Grass, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high36°

Average low20°

Average precipitation0.02 in

Chance of precipitation20%

Record high58° (2002)

Record low-19° (1996)

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 Sweet Grass, 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 Sweet Grass, 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.