As of 03:01 MDT

Weather in Turtle Lake, MT

38°

Turtle Lake, Sunday, 18 October, 03:01

Overcast. Feels like 35°. High 61°, low 29°.

Pressure30.09 inHg

Wind4 mph S

Humidity72%

Visibility6.2 mi

Dew point29°

See detailed hourly forecast

Monthly outlook for Turtle Lake, MT: average high 54.9°, average low 41°. That is 2.6° above the climate normal for October. Precipitation is expected on 3 days (about 0.3 inches), against a normal of 7 days and 1.6 inches. The warmest day looks like 19 October (65.1°), the coolest 19 October (27.9°).

54.9°/41°

Average high / low

+2.6°

Above normal

3 / 7

Wet days / normal

0.3 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
18 October – 27 October	56.1°	52.4°	+2.1°
28 October – 6 November	52.9°	46°	+3.9°
7 November – 16 November	at normal	41.9°	—

October records over 66 years

81.7°1 October 1992All-time high

6.4°26 October 2020All-time low

Mon, 1965° / 28°

65 °

Turtle Lake, Monday, 19 October

Overcast. High 65°, low 28°.

Pressure29.91 inHg

Wind3.4 mph NW

Humidity72%

Visibility1.3 mi

Dew point45°

Tue, 2058° / 47°

58 °

Turtle Lake, Tuesday, 20 October

Overcast. High 58°, low 47°.

Pressure30.06 inHg

Wind2.2 mph NW

Humidity73%

Visibility0.4 mi

Dew point46°

Wed, 2158° / 47°

58 °

Turtle Lake, Wednesday, 21 October

Overcast. High 58°, low 47°.

Pressure30.00 inHg

Wind3.1 mph NW

Humidity72%

Visibility—

Dew point47°

Thu, 2257° / 50°

0.05

57 °

Turtle Lake, Thursday, 22 October

Light rain. High 57°, low 50°.

Pressure29.80 inHg

Wind8.3 mph S

Humidity77%

Visibility—

Dew point47°

Fri, 2349° / 41°

49 °

Turtle Lake, Friday, 23 October

Light rain. High 49°, low 41°.

Pressure30.03 inHg

Wind10.5 mph SW

Humidity67%

Visibility—

Dew point34°

Sat, 2449° / 38°

49 °

Turtle Lake, Saturday, 24 October

Partly cloudy. High 49°, low 38°.

Pressure30.45 inHg

Wind6.5 mph NE

Humidity63%

Visibility—

Dew point33°

Sun, 2559° / 41°

59 °

Turtle Lake, Sunday, 25 October

Overcast. High 59°, low 41°.

Pressure30.15 inHg

Wind5.5 mph SW

Humidity32%

Visibility—

Dew point22°

Mon, 2652° / 45°

52 °

Turtle Lake, Monday, 26 October

Overcast. High 52°, low 45°.

Pressure30.03 inHg

Wind12.1 mph N

Humidity51%

Visibility—

Dew point33°

Tue, 2752° / 41°

0.16

52 °

Turtle Lake, Tuesday, 27 October

Light rain. High 52°, low 41°.

Pressure30.03 inHg

Wind6.3 mph N

Humidity58%

Visibility—

Dew point33°

Wed, 2853° / 39°

53 °

Turtle Lake, Wednesday, 28 October

Mostly clear. High 53°, low 39°.

Pressure30.06 inHg

Wind5.9 mph SW

Humidity44%

Visibility—

Dew point26°

Thu, 2957° / 40°

57 °

Turtle Lake, Thursday, 29 October

Overcast. High 57°, low 40°.

Pressure29.85 inHg

Wind12.1 mph SW

Humidity50%

Visibility—

Dew point33°

Fri, 3057° / 43°

57 °

Turtle Lake, Friday, 30 October

Overcast. High 57°, low 43°.

Pressure29.77 inHg

Wind14.4 mph SW

Humidity41%

Visibility—

Dew point29°

Sat, 3150° / 45°

50 °

Turtle Lake, Saturday, 31 October

Overcast. High 50°, low 45°.

Pressure29.74 inHg

Wind18.6 mph SW

Humidity57%

Visibility—

Dew point32°

Sun, 0149° / 41°

0.04

49 °

Turtle Lake, Sunday, 1 November

Light rain. High 49°, low 41°.

Pressure29.97 inHg

Wind14.4 mph SW

Humidity66%

Visibility—

Dew point35°

Mon, 0251° / 41°

0.01

51 °

Turtle Lake, Monday, 2 November

Light rain. High 51°, low 41°.

Pressure30.03 inHg

Wind9.9 mph S

Humidity76%

Visibility—

Dew point40°

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

Tue, 0346° / 34°

0.07

46 °

Turtle Lake, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high46°

Average low34°

Average precipitation0.07 in

Chance of precipitation38%

Record high61° (1981)

Record low10° (1973)

Wed, 0445° / 35°

0.14

45 °

Turtle Lake, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high45°

Average low35°

Average precipitation0.14 in

Chance of precipitation62%

Record high59° (1975)

Record low9° (1973)

Thu, 0545° / 34°

0.12

45 °

Turtle Lake, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high45°

Average low34°

Average precipitation0.12 in

Chance of precipitation63%

Record high61° (1980)

Record low15° (2003)

Fri, 0644° / 33°

0.14

44 °

Turtle Lake, Friday, 6 November

Climate normal for this date — 60-year average.

Average high44°

Average low33°

Average precipitation0.14 in

Chance of precipitation62%

Record high62° (2010)

Record low17° (2003)

Sat, 0743° / 33°

0.15

43 °

Turtle Lake, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high43°

Average low33°

Average precipitation0.15 in

Chance of precipitation57%

Record high58° (1978)

Record low16° (2017)

Sun, 0843° / 32°

0.1

43 °

Turtle Lake, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high43°

Average low32°

Average precipitation0.1 in

Chance of precipitation53%

Record high59° (2016)

Record low16° (1982)

Mon, 0943° / 31°

0.12

43 °

Turtle Lake, Monday, 9 November

Climate normal for this date — 60-year average.

Average high43°

Average low31°

Average precipitation0.12 in

Chance of precipitation52%

Record high62° (2016)

Record low9° (1986)

Tue, 1041° / 31°

0.1

41 °

Turtle Lake, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high41°

Average low31°

Average precipitation0.1 in

Chance of precipitation57%

Record high59° (2016)

Record low4° (1986)

Wed, 1141° / 30°

0.11

41 °

Turtle Lake, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high41°

Average low30°

Average precipitation0.11 in

Chance of precipitation45%

Record high59° (2016)

Record low7° (2014)

Thu, 1242° / 31°

0.11

42 °

Turtle Lake, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high42°

Average low31°

Average precipitation0.11 in

Chance of precipitation50%

Record high62° (1999)

Record low9° (2014)

Fri, 1342° / 31°

0.09

42 °

Turtle Lake, Friday, 13 November

Climate normal for this date — 60-year average.

Average high42°

Average low31°

Average precipitation0.09 in

Chance of precipitation53%

Record high62° (2025)

Record low12° (2014)

Sat, 1441° / 31°

0.11

41 °

Turtle Lake, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high41°

Average low31°

Average precipitation0.11 in

Chance of precipitation52%

Record high59° (1999)

Record low13° (2014)

Sun, 1542° / 30°

0.06

42 °

Turtle Lake, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high42°

Average low30°

Average precipitation0.06 in

Chance of precipitation35%

Record high61° (2021)

Record low12° (2014)

Mon, 1641° / 31°

0.13

41 °

Turtle Lake, Monday, 16 November

Climate normal for this date — 60-year average.

Average high41°

Average low31°

Average precipitation0.13 in

Chance of precipitation52%

Record high57° (2025)

Record low13° (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 Turtle Lake, 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 Turtle Lake, 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.