Monthly outlook for Colstrip, MT: average high 61.3°, average low 43.4°. That is 1.6° above the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 19 October (77.3°), the coolest 13 October (35.4°).
61.3°/43.4°
Average high / low
+1.6°
Above normal
3 / 3
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
60.2°
59.2°
+0.6°
21 October – 30 October
63.3°
55.4°
+4.4°
31 October – 9 November
at normal
49.7°
—
October records over 66 years
92.5°1 October 2011All-time high
-18.4°30 October 1991All-time low
Mon, 1245° / 37°0.06
45 °
Colstrip, Monday, 12 October
Light rain. High 45°, low 37°.
Pressure30.06 inHg
Wind10.7 mph NW
Humidity73%
Visibility6.2 mi
Dew point34°
Tue, 1351° / 35°0.13
51 °
Colstrip, Tuesday, 13 October
Light rain. High 51°, low 35°.
Pressure30.12 inHg
Wind2.6 mph SE
Humidity92%
Visibility3.2 mi
Dew point40°
Wed, 1456° / 35°0
56 °
Colstrip, Wednesday, 14 October
Overcast. High 56°, low 35°.
Pressure30.21 inHg
Wind3.4 mph SE
Humidity48%
Visibility6.2 mi
Dew point32°
Thu, 1558° / 40°0
58 °
Colstrip, Thursday, 15 October
Clear. High 58°, low 40°.
Pressure30.53 inHg
Wind10.7 mph NW
Humidity41%
Visibility—
Dew point30°
Fri, 1671° / 38°0
71 °
Colstrip, Friday, 16 October
Clear. High 71°, low 38°.
Pressure30.36 inHg
Wind8.4 mph S
Humidity34%
Visibility—
Dew point31°
Sat, 1772° / 46°0
72 °
Colstrip, Saturday, 17 October
Clear. High 72°, low 46°.
Pressure29.94 inHg
Wind13.3 mph W
Humidity23%
Visibility—
Dew point26°
Sun, 1866° / 53°0
66 °
Colstrip, Sunday, 18 October
Mostly clear. High 66°, low 53°.
Pressure30.00 inHg
Wind11.2 mph W
Humidity34%
Visibility—
Dew point33°
Mon, 1977° / 50°0
77 °
Colstrip, Monday, 19 October
Partly cloudy. High 77°, low 50°.
Pressure29.83 inHg
Wind6.7 mph SE
Humidity22%
Visibility—
Dew point28°
Tue, 2060° / 48°0.01
60 °
Colstrip, Tuesday, 20 October
Light rain. High 60°, low 48°.
Pressure29.91 inHg
Wind16.2 mph NW
Humidity47%
Visibility—
Dew point35°
Wed, 2161° / 44°0
61 °
Colstrip, Wednesday, 21 October
Overcast. High 61°, low 44°.
Pressure29.97 inHg
Wind9.3 mph NW
Humidity36%
Visibility—
Dew point31°
Thu, 2264° / 47°0
64 °
Colstrip, Thursday, 22 October
Clear. High 64°, low 47°.
Pressure30.03 inHg
Wind10.4 mph NW
Humidity33%
Visibility—
Dew point30°
Fri, 2371° / 47°0
71 °
Colstrip, Friday, 23 October
Partly cloudy. High 71°, low 47°.
Pressure29.97 inHg
Wind12.1 mph S
Humidity25%
Visibility—
Dew point26°
Sat, 2461° / 46°0
61 °
Colstrip, Saturday, 24 October
Clear. High 61°, low 46°.
Pressure30.09 inHg
Wind7.8 mph NW
Humidity25%
Visibility—
Dew point21°
Sun, 2555° / 42°0
55 °
Colstrip, Sunday, 25 October
Overcast. High 55°, low 42°.
Pressure30.36 inHg
Wind7 mph W
Humidity35%
Visibility—
Dew point24°
Mon, 2667° / 42°0
67 °
Colstrip, Monday, 26 October
Overcast. High 67°, low 42°.
Pressure29.91 inHg
Wind10.2 mph W
Humidity20%
Visibility—
Dew point18°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2754° / 33°0.03
54 °
Colstrip, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high54°
Average low33°
Average precipitation0.03 in
Chance of precipitation18%
Record high75° (1986)
Record low5° (2023)
Wed, 2853° / 34°0.05
53 °
Colstrip, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high53°
Average low34°
Average precipitation0.05 in
Chance of precipitation25%
Record high79° (1990)
Record low8° (2023)
Thu, 2952° / 33°0.06
52 °
Colstrip, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high52°
Average low33°
Average precipitation0.06 in
Chance of precipitation32%
Record high75° (1968)
Record low-5° (1991)
Fri, 3052° / 31°0.03
52 °
Colstrip, Friday, 30 October
Climate normal for this date — 60-year average.
Average high52°
Average low31°
Average precipitation0.03 in
Chance of precipitation18%
Record high73° (1990)
Record low-18° (1991)
Sat, 3151° / 33°0.03
51 °
Colstrip, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.03 in
Chance of precipitation18%
Record high77° (1999)
Record low3° (1972)
Sun, 0151° / 32°0.03
51 °
Colstrip, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low32°
Average precipitation0.03 in
Chance of precipitation17%
Record high73° (1965)
Record low2° (1991)
Mon, 0250° / 31°0.02
50 °
Colstrip, Monday, 2 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.02 in
Chance of precipitation20%
Record high76° (1965)
Record low-8° (1995)
Tue, 0350° / 31°0.02
50 °
Colstrip, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.02 in
Chance of precipitation15%
Record high70° (1981)
Record low-16° (1991)
Wed, 0452° / 32°0.03
52 °
Colstrip, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low32°
Average precipitation0.03 in
Chance of precipitation15%
Record high73° (1983)
Record low9° (1995)
Thu, 0551° / 32°0.03
51 °
Colstrip, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low32°
Average precipitation0.03 in
Chance of precipitation25%
Record high73° (2020)
Record low5° (1961)
Fri, 0649° / 31°0.04
49 °
Colstrip, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low31°
Average precipitation0.04 in
Chance of precipitation20%
Record high74° (2010)
Record low9° (1991)
Sat, 0749° / 31°0.03
49 °
Colstrip, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low31°
Average precipitation0.03 in
Chance of precipitation17%
Record high73° (1999)
Record low1° (1991)
Sun, 0847° / 29°0.03
47 °
Colstrip, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.03 in
Chance of precipitation18%
Record high77° (1999)
Record low-3° (2000)
Mon, 0946° / 28°0.07
46 °
Colstrip, Monday, 9 November
Climate normal for this date — 60-year average.
Average high46°
Average low28°
Average precipitation0.07 in
Chance of precipitation23%
Record high69° (2016)
Record low-7° (1966)
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 Colstrip, 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 Colstrip, 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.