As of 03:17 MDT

Weather in Calais, MT

46°

Calais, Friday, 9 October, 03:17

Mostly clear. Feels like 44°. High 84°, low 46°.

Pressure29.80 inHg

Wind4.9 mph SE

Humidity76%

Visibility6.2 mi

Dew point40°

See detailed hourly forecast

Monthly outlook for Calais, MT: average high 55.7°, average low 41.5°. That is 0.3° below the climate normal for October. Precipitation is expected on 3 days (about 0.9 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 9 October (83.8°), the coolest 16 October (33.4°).

55.7°/41.5°

Average high / low

−0.3°

Below normal

3 / 3

Wet days / normal

0.9 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 October – 18 October	55.7°	57.1°	-0.7°
19 October – 28 October	55.6°	53.7°	+1.1°
29 October – 7 November	at normal	46.5°	—

October records over 66 years

90.3°1 October 1992All-time high

-4.4°31 October 2023All-time low

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

Sat, 1064° / 49°

64 °

Calais, Saturday, 10 October

Overcast. High 64°, low 49°.

Pressure29.59 inHg

Wind11.2 mph NW

Humidity40%

Visibility6.2 mi

Dew point40°

Sun, 1148° / 38°

0.27

48 °

Calais, Sunday, 11 October

Rain. High 48°, low 38°.

Pressure30.09 inHg

Wind15.6 mph NE

Humidity84%

Visibility6.2 mi

Dew point36°

Mon, 1240° / 35°

0.51

40 °

Calais, Monday, 12 October

Light rain. High 40°, low 35°.

Pressure30.09 inHg

Wind12.3 mph NE

Humidity95%

Visibility3.1 mi

Dew point36°

Tue, 1345° / 36°

0.01

45 °

Calais, Tuesday, 13 October

Light rain. High 45°, low 36°.

Pressure30.15 inHg

Wind4.5 mph SW

Humidity74%

Visibility—

Dew point34°

Wed, 1456° / 34°

56 °

Calais, Wednesday, 14 October

Overcast. High 56°, low 34°.

Pressure29.88 inHg

Wind9.2 mph SW

Humidity61%

Visibility—

Dew point36°

Thu, 1551° / 39°

51 °

Calais, Thursday, 15 October

Overcast. High 51°, low 39°.

Pressure30.12 inHg

Wind27.3 mph NW

Humidity59%

Visibility—

Dew point31°

Fri, 1647° / 33°

47 °

Calais, Friday, 16 October

Mostly clear. High 47°, low 33°.

Pressure30.45 inHg

Wind22.5 mph NW

Humidity38%

Visibility—

Dew point17°

Sat, 1762° / 39°

62 °

Calais, Saturday, 17 October

Overcast. High 62°, low 39°.

Pressure29.97 inHg

Wind15.5 mph W

Humidity26%

Visibility—

Dew point22°

Sun, 1860° / 46°

60 °

Calais, Sunday, 18 October

Overcast. High 60°, low 46°.

Pressure30.00 inHg

Wind6.3 mph N

Humidity30%

Visibility—

Dew point25°

Mon, 1960° / 44°

60 °

Calais, Monday, 19 October

Overcast. High 60°, low 44°.

Pressure30.03 inHg

Wind11.8 mph E

Humidity42%

Visibility—

Dew point31°

Tue, 2059° / 48°

59 °

Calais, Tuesday, 20 October

Overcast. High 59°, low 48°.

Pressure29.85 inHg

Wind9.2 mph N

Humidity56%

Visibility—

Dew point39°

Wed, 2153° / 44°

53 °

Calais, Wednesday, 21 October

Overcast. High 53°, low 44°.

Pressure30.27 inHg

Wind8.8 mph NE

Humidity64%

Visibility—

Dew point38°

Thu, 2254° / 42°

54 °

Calais, Thursday, 22 October

Clear. High 54°, low 42°.

Pressure30.36 inHg

Wind10.1 mph SE

Humidity55%

Visibility—

Dew point34°

Fri, 2352° / 44°

0.1

52 °

Calais, Friday, 23 October

Light rain. High 52°, low 44°.

Pressure30.09 inHg

Wind12 mph SE

Humidity69%

Visibility—

Dew point41°

Sat, 2454° / 48°

0.01

54 °

Calais, Saturday, 24 October

Light rain. High 54°, low 48°.

Pressure29.94 inHg

Wind7.7 mph NW

Humidity82%

Visibility—

Dew point45°

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

Sun, 2553° / 35°

0.03

53 °

Calais, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high53°

Average low35°

Average precipitation0.03 in

Chance of precipitation12%

Record high74° (1990)

Record low6° (2020)

Mon, 2653° / 35°

0.03

53 °

Calais, Monday, 26 October

Climate normal for this date — 60-year average.

Average high53°

Average low35°

Average precipitation0.03 in

Chance of precipitation20%

Record high73° (1983)

Record low4° (2020)

Tue, 2751° / 33°

0.04

51 °

Calais, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high51°

Average low33°

Average precipitation0.04 in

Chance of precipitation20%

Record high73° (1983)

Record low7° (2023)

Wed, 2850° / 33°

0.03

50 °

Calais, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high50°

Average low33°

Average precipitation0.03 in

Chance of precipitation15%

Record high74° (1990)

Record low11° (2023)

Thu, 2948° / 32°

0.05

48 °

Calais, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high48°

Average low32°

Average precipitation0.05 in

Chance of precipitation22%

Record high72° (1968)

Record low10° (1991)

Fri, 3048° / 31°

0.03

48 °

Calais, Friday, 30 October

Climate normal for this date — 60-year average.

Average high48°

Average low31°

Average precipitation0.03 in

Chance of precipitation15%

Record high70° (1983)

Record low-2° (1991)

Sat, 3148° / 31°

0.02

48 °

Calais, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high48°

Average low31°

Average precipitation0.02 in

Chance of precipitation17%

Record high76° (1990)

Record low-4° (2023)

Sun, 0147° / 32°

0.04

47 °

Calais, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high47°

Average low32°

Average precipitation0.04 in

Chance of precipitation15%

Record high69° (1965)

Record low2° (1984)

Mon, 0246° / 30°

0.02

46 °

Calais, Monday, 2 November

Climate normal for this date — 60-year average.

Average high46°

Average low30°

Average precipitation0.02 in

Chance of precipitation13%

Record high71° (1965)

Record low3° (1991)

Tue, 0346° / 30°

0.02

46 °

Calais, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high46°

Average low30°

Average precipitation0.02 in

Chance of precipitation15%

Record high66° (1981)

Record low-4° (1991)

Wed, 0447° / 30°

0.03

47 °

Calais, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high47°

Average low30°

Average precipitation0.03 in

Chance of precipitation23%

Record high69° (1975)

Record low8° (1991)

Thu, 0546° / 29°

0.02

46 °

Calais, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high46°

Average low29°

Average precipitation0.02 in

Chance of precipitation13%

Record high71° (2020)

Record low-1° (2003)

Fri, 0645° / 28°

0.02

45 °

Calais, Friday, 6 November

Climate normal for this date — 60-year average.

Average high45°

Average low28°

Average precipitation0.02 in

Chance of precipitation17%

Record high66° (2009)

Record low0° (1991)

Sat, 0745° / 28°

0.02

45 °

Calais, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high45°

Average low28°

Average precipitation0.02 in

Chance of precipitation10%

Record high73° (1999)

Record low-3° (1991)

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 Calais, 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 Calais, 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.