Monthly outlook for Calais, MT: average high 57.2°, average low 41.2°. That is 0.7° above the climate normal for October. Precipitation is expected on 2 days (about 0.8 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 19 October (73.5°), the coolest 14 October (30.8°).
57.2°/41.2°
Average high / low
+0.7°
Above normal
2 / 3
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
55.2°
56.9°
-0.9°
20 October – 29 October
60.6°
52.7°
+4.4°
30 October – 8 November
at normal
46°
—
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).
Sun, 1146° / 37°0.42
46 °
Calais, Sunday, 11 October
Light rain. High 46°, low 37°.
Pressure30.03 inHg
Wind12.1 mph NE
Humidity90%
Visibility3.1 mi
Dew point40°
Mon, 1239° / 35°0.39
39 °
Calais, Monday, 12 October
Rain. High 39°, low 35°.
Pressure30.06 inHg
Wind8.5 mph N
Humidity88%
Visibility6.2 mi
Dew point35°
Tue, 1350° / 36°0
50 °
Calais, Tuesday, 13 October
Overcast. High 50°, low 36°.
Pressure30.12 inHg
Wind5.3 mph SW
Humidity66%
Visibility6.2 mi
Dew point32°
Wed, 1456° / 31°0
56 °
Calais, Wednesday, 14 October
Clear. High 56°, low 31°.
Pressure30.33 inHg
Wind3 mph W
Humidity55%
Visibility6.2 mi
Dew point34°
Thu, 1556° / 35°0
56 °
Calais, Thursday, 15 October
Clear. High 56°, low 35°.
Pressure30.47 inHg
Wind11.8 mph N
Humidity41%
Visibility—
Dew point30°
Fri, 1649° / 32°0
49 °
Calais, Friday, 16 October
Clear. High 49°, low 32°.
Pressure30.59 inHg
Wind9.3 mph SE
Humidity45%
Visibility—
Dew point26°
Sat, 1758° / 33°0
58 °
Calais, Saturday, 17 October
Overcast. High 58°, low 33°.
Pressure30.18 inHg
Wind19.5 mph S
Humidity27%
Visibility—
Dew point16°
Sun, 1864° / 45°0
64 °
Calais, Sunday, 18 October
Overcast. High 64°, low 45°.
Pressure30.03 inHg
Wind8.9 mph W
Humidity35%
Visibility—
Dew point29°
Mon, 1973° / 51°0
73 °
Calais, Monday, 19 October
Overcast. High 73°, low 51°.
Pressure29.94 inHg
Wind9.8 mph W
Humidity32%
Visibility—
Dew point35°
Tue, 2068° / 55°0
68 °
Calais, Tuesday, 20 October
Light rain. High 68°, low 55°.
Pressure29.83 inHg
Wind20.4 mph SW
Humidity32%
Visibility—
Dew point35°
Wed, 2155° / 48°0
55 °
Calais, Wednesday, 21 October
Light rain. High 55°, low 48°.
Pressure30.12 inHg
Wind19.8 mph W
Humidity57%
Visibility—
Dew point39°
Thu, 2260° / 45°0
60 °
Calais, Thursday, 22 October
Clear. High 60°, low 45°.
Pressure30.21 inHg
Wind7.1 mph NE
Humidity49%
Visibility—
Dew point35°
Fri, 2356° / 43°0
56 °
Calais, Friday, 23 October
Overcast. High 56°, low 43°.
Pressure30.33 inHg
Wind8.7 mph E
Humidity49%
Visibility—
Dew point33°
Sat, 2459° / 41°0
59 °
Calais, Saturday, 24 October
Clear. High 59°, low 41°.
Pressure30.18 inHg
Wind9.1 mph E
Humidity55%
Visibility—
Dew point36°
Sun, 2566° / 45°0
66 °
Calais, Sunday, 25 October
Overcast. High 66°, low 45°.
Pressure29.80 inHg
Wind14.3 mph W
Humidity37%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sun, 0843° / 27°0.03
43 °
Calais, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high43°
Average low27°
Average precipitation0.03 in
Chance of precipitation20%
Record high70° (1999)
Record low-2° (2000)
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.