As of 15:15 MDT

Weather in Lewistown, MT

41°

Lewistown, Saturday, 31 October, 15:15

Overcast. Feels like 41°. High 41°, low 31°.

Pressure30.03 inHg

Wind2.3 mph NW

Humidity74%

Visibility6.2 mi

Dew point33°

See detailed hourly forecast

Monthly outlook for Lewistown, MT: average high 49.9°, average low 33.6°. That is 2.7° above the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 4 days and 0.6 inches. The warmest day looks like 8 November (60.8°), the coolest 3 November (28.5°).

49.9°/33.6°

Average high / low

+2.7°

Above normal

3 / 4

Wet days / normal

0.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
31 October – 9 November	51.4°	46.2°	+2.9°
10 November – 19 November	47.5°	42.7°	+2.7°
20 November – 29 November	at normal	37.5°	—

October records over 66 years

87.4°1 October 2011All-time high

-16.4°30 October 1991All-time low

Sun, 0141° / 33°

0.3

41 °

Lewistown, Sunday, 1 November

Rain. High 41°, low 33°.

Pressure29.88 inHg

Wind1.5 mph E

Humidity83%

Visibility6.2 mi

Dew point39°

Mon, 0248° / 30°

0.17

48 °

Lewistown, Monday, 2 November

Light rain. High 48°, low 30°.

Pressure30.24 inHg

Wind10.2 mph NW

Humidity69%

Visibility6.2 mi

Dew point34°

Tue, 0360° / 29°

60 °

Lewistown, Tuesday, 3 November

Overcast. High 60°, low 29°.

Pressure30.06 inHg

Wind4.1 mph E

Humidity42%

Visibility6.2 mi

Dew point24°

Wed, 0449° / 33°

49 °

Lewistown, Wednesday, 4 November

Overcast. High 49°, low 33°.

Pressure30.03 inHg

Wind1.8 mph W

Humidity56%

Visibility6.2 mi

Dew point28°

Thu, 0555° / 31°

55 °

Lewistown, Thursday, 5 November

Clear. High 55°, low 31°.

Pressure29.97 inHg

Wind11.7 mph NW

Humidity47%

Visibility—

Dew point29°

Fri, 0655° / 32°

0.07

55 °

Lewistown, Friday, 6 November

Snow. High 55°, low 32°.

Pressure29.74 inHg

Wind28.2 mph W

Humidity49%

Visibility—

Dew point27°

Sat, 0751° / 33°

51 °

Lewistown, Saturday, 7 November

Clear. High 51°, low 33°.

Pressure30.09 inHg

Wind15 mph W

Humidity31%

Visibility—

Dew point15°

Sun, 0861° / 41°

61 °

Lewistown, Sunday, 8 November

Overcast. High 61°, low 41°.

Pressure29.74 inHg

Wind9.2 mph NW

Humidity19%

Visibility—

Dew point16°

Mon, 0953° / 36°

53 °

Lewistown, Monday, 9 November

Partly cloudy. High 53°, low 36°.

Pressure30.06 inHg

Wind8.6 mph NW

Humidity25%

Visibility—

Dew point14°

Tue, 1059° / 42°

59 °

Lewistown, Tuesday, 10 November

Overcast. High 59°, low 42°.

Pressure29.88 inHg

Wind5 mph SE

Humidity37%

Visibility—

Dew point28°

Wed, 1152° / 39°

52 °

Lewistown, Wednesday, 11 November

Overcast. High 52°, low 39°.

Pressure29.65 inHg

Wind11 mph E

Humidity38%

Visibility—

Dew point26°

Thu, 1237° / 33°

37 °

Lewistown, Thursday, 12 November

Overcast. High 37°, low 33°.

Pressure29.77 inHg

Wind11.7 mph E

Humidity63%

Visibility—

Dew point24°

Fri, 1344° / 29°

44 °

Lewistown, Friday, 13 November

Clear. High 44°, low 29°.

Pressure30.12 inHg

Wind4.2 mph S

Humidity59%

Visibility—

Dew point26°

Sat, 1443° / 33°

43 °

Lewistown, Saturday, 14 November

Overcast. High 43°, low 33°.

Pressure30.21 inHg

Wind3.8 mph S

Humidity61%

Visibility—

Dew point28°

Sun, 1551° / 34°

51 °

Lewistown, Sunday, 15 November

Overcast. High 51°, low 34°.

Pressure29.91 inHg

Wind7.9 mph SW

Humidity49%

Visibility—

Dew point27°

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

Mon, 1644° / 27°

0.03

44 °

Lewistown, Monday, 16 November

Climate normal for this date — 60-year average.

Average high44°

Average low27°

Average precipitation0.03 in

Chance of precipitation22%

Record high64° (2001)

Record low-1° (2000)

Tue, 1742° / 26°

0.04

42 °

Lewistown, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high42°

Average low26°

Average precipitation0.04 in

Chance of precipitation32%

Record high63° (1976)

Record low2° (2022)

Wed, 1842° / 25°

0.04

42 °

Lewistown, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high42°

Average low25°

Average precipitation0.04 in

Chance of precipitation23%

Record high64° (2008)

Record low-4° (2022)

Thu, 1940° / 24°

0.05

40 °

Lewistown, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high40°

Average low24°

Average precipitation0.05 in

Chance of precipitation20%

Record high59° (1989)

Record low-6° (1985)

Fri, 2041° / 24°

0.02

41 °

Lewistown, Friday, 20 November

Climate normal for this date — 60-year average.

Average high41°

Average low24°

Average precipitation0.02 in

Chance of precipitation25%

Record high58° (2005)

Record low-24° (1985)

Sat, 2140° / 22°

0.02

40 °

Lewistown, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high40°

Average low22°

Average precipitation0.02 in

Chance of precipitation15%

Record high61° (2002)

Record low-26° (1977)

Sun, 2238° / 22°

0.03

38 °

Lewistown, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high38°

Average low22°

Average precipitation0.03 in

Chance of precipitation28%

Record high61° (2021)

Record low-23° (1985)

Mon, 2339° / 22°

0.02

39 °

Lewistown, Monday, 23 November

Climate normal for this date — 60-year average.

Average high39°

Average low22°

Average precipitation0.02 in

Chance of precipitation15%

Record high62° (2017)

Record low-27° (1985)

Tue, 2438° / 23°

0.04

38 °

Lewistown, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high38°

Average low23°

Average precipitation0.04 in

Chance of precipitation25%

Record high55° (1976)

Record low-25° (1993)

Wed, 2537° / 22°

0.08

37 °

Lewistown, Wednesday, 25 November

Climate normal for this date — 60-year average.

Average high37°

Average low22°

Average precipitation0.08 in

Chance of precipitation43%

Record high53° (1974)

Record low-19° (1993)

Thu, 2635° / 20°

0.06

35 °

Lewistown, Thursday, 26 November

Climate normal for this date — 60-year average.

Average high35°

Average low20°

Average precipitation0.06 in

Chance of precipitation35%

Record high62° (2017)

Record low-21° (1985)

Fri, 2736° / 19°

0.03

36 °

Lewistown, Friday, 27 November

Climate normal for this date — 60-year average.

Average high36°

Average low19°

Average precipitation0.03 in

Chance of precipitation18%

Record high59° (2017)

Record low-19° (1985)

Sat, 2836° / 20°

0.04

36 °

Lewistown, Saturday, 28 November

Climate normal for this date — 60-year average.

Average high36°

Average low20°

Average precipitation0.04 in

Chance of precipitation23%

Record high59° (2021)

Record low-24° (1985)

Sun, 2936° / 19°

0.04

36 °

Lewistown, Sunday, 29 November

Climate normal for this date — 60-year average.

Average high36°

Average low19°

Average precipitation0.04 in

Chance of precipitation27%

Record high54° (2021)

Record low-15° (2006)

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 Lewistown, 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 Lewistown, 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.