Monthly outlook for Colstrip, MT: average high 58.5°, average low 40°. That is 0.4° above the climate normal for October. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 17 October (73.7°), the coolest 16 October (33.4°).
58.5°/40°
Average high / low
+0.4°
Above normal
2 / 3
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
61.4°
58.9°
+1.4°
23 October – 1 November
53.6°
54°
-0.2°
2 November – 11 November
at normal
48.5°
—
October records over 66 years
92.5°1 October 2011All-time high
-18.4°30 October 1991All-time low
Wed, 1462° / 38°0
62 °
Colstrip, Wednesday, 14 October
Mostly clear. High 62°, low 38°.
Pressure30.12 inHg
Wind5.9 mph S
Humidity39%
Visibility6.2 mi
Dew point31°
Thu, 1553° / 37°0
53 °
Colstrip, Thursday, 15 October
Overcast. High 53°, low 37°.
Pressure30.62 inHg
Wind13.3 mph NW
Humidity47%
Visibility6.2 mi
Dew point26°
Fri, 1668° / 33°0
68 °
Colstrip, Friday, 16 October
Clear. High 68°, low 33°.
Pressure30.45 inHg
Wind7 mph S
Humidity37%
Visibility6.2 mi
Dew point33°
Sat, 1774° / 42°0
74 °
Colstrip, Saturday, 17 October
Overcast. High 74°, low 42°.
Pressure29.94 inHg
Wind7.2 mph W
Humidity25%
Visibility—
Dew point29°
Sun, 1865° / 46°0
65 °
Colstrip, Sunday, 18 October
Clear. High 65°, low 46°.
Pressure30.03 inHg
Wind7.1 mph W
Humidity44%
Visibility—
Dew point37°
Mon, 1972° / 43°0
72 °
Colstrip, Monday, 19 October
Mostly clear. High 72°, low 43°.
Pressure29.74 inHg
Wind7.5 mph S
Humidity26%
Visibility—
Dew point26°
Tue, 2061° / 46°0
61 °
Colstrip, Tuesday, 20 October
Overcast. High 61°, low 46°.
Pressure29.74 inHg
Wind17.6 mph NW
Humidity46%
Visibility—
Dew point33°
Wed, 2150° / 43°0.05
50 °
Colstrip, Wednesday, 21 October
Light rain. High 50°, low 43°.
Pressure30.03 inHg
Wind9.8 mph NW
Humidity49%
Visibility—
Dew point29°
Thu, 2254° / 39°0
54 °
Colstrip, Thursday, 22 October
Overcast. High 54°, low 39°.
Pressure29.83 inHg
Wind17 mph NW
Humidity46%
Visibility—
Dew point29°
Fri, 2344° / 38°0.14
44 °
Colstrip, Friday, 23 October
Light rain. High 44°, low 38°.
Pressure30.18 inHg
Wind17.3 mph NW
Humidity95%
Visibility—
Dew point38°
Sat, 2453° / 35°0
53 °
Colstrip, Saturday, 24 October
Mostly clear. High 53°, low 35°.
Pressure30.30 inHg
Wind14.1 mph W
Humidity32%
Visibility—
Dew point20°
Sun, 2553° / 42°0
53 °
Colstrip, Sunday, 25 October
Partly cloudy. High 53°, low 42°.
Pressure30.45 inHg
Wind15.5 mph NW
Humidity39%
Visibility—
Dew point25°
Mon, 2660° / 37°0
60 °
Colstrip, Monday, 26 October
Clear. High 60°, low 37°.
Pressure30.06 inHg
Wind14.5 mph S
Humidity41%
Visibility—
Dew point28°
Tue, 2761° / 43°0
61 °
Colstrip, Tuesday, 27 October
Light rain. High 61°, low 43°.
Pressure29.59 inHg
Wind25 mph NW
Humidity34%
Visibility—
Dew point30°
Wed, 2851° / 40°0.02
51 °
Colstrip, Wednesday, 28 October
Light rain. High 51°, low 40°.
Pressure30.09 inHg
Wind19.4 mph NW
Humidity50%
Visibility—
Dew point29°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Tue, 1045° / 26°0.05
45 °
Colstrip, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.05 in
Chance of precipitation20%
Record high71° (2007)
Record low-18° (1986)
Wed, 1144° / 25°0.02
44 °
Colstrip, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high44°
Average low25°
Average precipitation0.02 in
Chance of precipitation25%
Record high69° (1990)
Record low-5° (1986)
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.