Monthly outlook for Copper Cliff, MT: average high 54.7°, average low 33.5°. That is 0.4° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 5 days and 0.9 inches. The warmest day looks like 17 October (64.1°), the coolest 13 October (25.7°).
54.7°/33.5°
Average high / low
+0.4°
Above normal
1 / 5
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
52.9°
55.7°
-1.5°
22 October – 31 October
57.7°
49.8°
+4.4°
1 November – 10 November
at normal
44.3°
—
October records over 66 years
84.4°1 October 1992All-time high
-9.6°25 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Potomac (8 mi).
Tue, 1345° / 26°0
45 °
Copper Cliff, Tuesday, 13 October
Overcast. High 45°, low 26°.
Pressure30.18 inHg
Wind2 mph SW
Humidity68%
Visibility6.2 mi
Dew point28°
Wed, 1452° / 30°0
52 °
Copper Cliff, Wednesday, 14 October
Partly cloudy. High 52°, low 30°.
Pressure30.21 inHg
Wind3.2 mph SW
Humidity56%
Visibility6.2 mi
Dew point27°
Thu, 1557° / 33°0
57 °
Copper Cliff, Thursday, 15 October
Clear. High 57°, low 33°.
Pressure30.56 inHg
Wind1.7 mph N
Humidity55%
Visibility6.2 mi
Dew point34°
Fri, 1662° / 33°0
62 °
Copper Cliff, Friday, 16 October
Clear. High 62°, low 33°.
Pressure30.39 inHg
Wind1.6 mph SE
Humidity45%
Visibility—
Dew point30°
Sat, 1764° / 37°0
64 °
Copper Cliff, Saturday, 17 October
Clear. High 64°, low 37°.
Pressure29.97 inHg
Wind6.4 mph W
Humidity38%
Visibility—
Dew point29°
Sun, 1856° / 40°0.01
56 °
Copper Cliff, Sunday, 18 October
Light rain. High 56°, low 40°.
Pressure29.97 inHg
Wind8.2 mph W
Humidity59%
Visibility—
Dew point37°
Mon, 1960° / 38°0
60 °
Copper Cliff, Monday, 19 October
Overcast. High 60°, low 38°.
Pressure29.77 inHg
Wind3.6 mph NE
Humidity38%
Visibility—
Dew point26°
Tue, 2045° / 36°0.03
45 °
Copper Cliff, Tuesday, 20 October
Light rain. High 45°, low 36°.
Pressure29.83 inHg
Wind5.1 mph NW
Humidity69%
Visibility—
Dew point32°
Wed, 2148° / 28°0
48 °
Copper Cliff, Wednesday, 21 October
Clear. High 48°, low 28°.
Pressure30.12 inHg
Wind6.9 mph W
Humidity48%
Visibility—
Dew point22°
Thu, 2253° / 28°0
53 °
Copper Cliff, Thursday, 22 October
Clear. High 53°, low 28°.
Pressure30.24 inHg
Wind3 mph W
Humidity36%
Visibility—
Dew point18°
Fri, 2360° / 31°0
60 °
Copper Cliff, Friday, 23 October
Clear. High 60°, low 31°.
Pressure30.09 inHg
Wind2.5 mph NW
Humidity40%
Visibility—
Dew point25°
Sat, 2456° / 38°0
56 °
Copper Cliff, Saturday, 24 October
Mostly clear. High 56°, low 38°.
Pressure30.12 inHg
Wind8.5 mph W
Humidity41%
Visibility—
Dew point28°
Sun, 2557° / 34°0
57 °
Copper Cliff, Sunday, 25 October
Clear. High 57°, low 34°.
Pressure30.24 inHg
Wind3.5 mph W
Humidity51%
Visibility—
Dew point31°
Mon, 2660° / 35°0
60 °
Copper Cliff, Monday, 26 October
Clear. High 60°, low 35°.
Pressure30.09 inHg
Wind3 mph NW
Humidity42%
Visibility—
Dew point28°
Tue, 2761° / 41°0
61 °
Copper Cliff, Tuesday, 27 October
Overcast. High 61°, low 41°.
Pressure29.83 inHg
Wind8.5 mph W
Humidity34%
Visibility—
Dew point27°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2849° / 31°0.07
49 °
Copper Cliff, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high49°
Average low31°
Average precipitation0.07 in
Chance of precipitation27%
Record high64° (2008)
Record low11° (1991)
Thu, 2948° / 30°0.05
48 °
Copper Cliff, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.05 in
Chance of precipitation33%
Record high65° (2021)
Record low3° (1991)
Fri, 3047° / 29°0.04
47 °
Copper Cliff, Friday, 30 October
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.04 in
Chance of precipitation23%
Record high65° (2008)
Record low1° (1996)
Sat, 3146° / 30°0.07
46 °
Copper Cliff, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.07 in
Chance of precipitation32%
Record high64° (2014)
Record low-1° (1996)
Sun, 0147° / 30°0.08
47 °
Copper Cliff, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.08 in
Chance of precipitation32%
Record high64° (1988)
Record low2° (1984)
Mon, 0246° / 30°0.07
46 °
Copper Cliff, Monday, 2 November
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.07 in
Chance of precipitation35%
Record high62° (1981)
Record low1° (1991)
Tue, 0346° / 30°0.03
46 °
Copper Cliff, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.03 in
Chance of precipitation23%
Record high62° (2020)
Record low-2° (1973)
Wed, 0446° / 31°0.07
46 °
Copper Cliff, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.07 in
Chance of precipitation43%
Record high60° (2020)
Record low-6° (1973)
Thu, 0545° / 30°0.07
45 °
Copper Cliff, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high45°
Average low30°
Average precipitation0.07 in
Chance of precipitation37%
Record high65° (2020)
Record low0° (1961)
Fri, 0644° / 29°0.07
44 °
Copper Cliff, Friday, 6 November
Climate normal for this date — 60-year average.
Average high44°
Average low29°
Average precipitation0.07 in
Chance of precipitation42%
Record high62° (2012)
Record low11° (2003)
Sat, 0743° / 29°0.09
43 °
Copper Cliff, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high43°
Average low29°
Average precipitation0.09 in
Chance of precipitation43%
Record high57° (2010)
Record low5° (1961)
Sun, 0843° / 28°0.06
43 °
Copper Cliff, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high43°
Average low28°
Average precipitation0.06 in
Chance of precipitation35%
Record high59° (2016)
Record low0° (1994)
Mon, 0943° / 28°0.06
43 °
Copper Cliff, Monday, 9 November
Climate normal for this date — 60-year average.
Average high43°
Average low28°
Average precipitation0.06 in
Chance of precipitation38%
Record high61° (2016)
Record low0° (1986)
Tue, 1041° / 26°0.04
41 °
Copper Cliff, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high41°
Average low26°
Average precipitation0.04 in
Chance of precipitation33%
Record high60° (2016)
Record low-19° (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 Copper Cliff, 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 Copper Cliff, 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.