Monthly outlook for Greenough, MT: average high 56.5°, average low 33.9°. That is 2.5° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 5 days and 0.9 inches. The warmest day looks like 16 October (67.1°), the coolest 31 October (28.9°).
56.5°/33.9°
Average high / low
+2.5°
Above normal
2 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
58.7°
54.3°
+2.4°
26 October – 4 November
52.7°
47.4°
+3°
5 November – 14 November
at normal
42.5°
—
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 (7 mi).
Sat, 1765° / 34°0
65 °
Greenough, Saturday, 17 October
Partly cloudy. High 65°, low 34°.
Pressure30.09 inHg
Wind2.8 mph S
Humidity38%
Visibility6.2 mi
Dew point31°
Sun, 1859° / 36°0
59 °
Greenough, Sunday, 18 October
Clear. High 59°, low 36°.
Pressure30.09 inHg
Wind0.4 mph N
Humidity59%
Visibility6.2 mi
Dew point38°
Mon, 1962° / 36°0
62 °
Greenough, Monday, 19 October
Partly cloudy. High 62°, low 36°.
Pressure29.88 inHg
Wind1.9 mph N
Humidity55%
Visibility6.2 mi
Dew point38°
Tue, 2063° / 41°0
63 °
Greenough, Tuesday, 20 October
Overcast. High 63°, low 41°.
Pressure29.97 inHg
Wind2.5 mph E
Humidity50%
Visibility—
Dew point35°
Wed, 2162° / 35°0
62 °
Greenough, Wednesday, 21 October
Clear. High 62°, low 35°.
Pressure30.06 inHg
Wind2 mph NW
Humidity59%
Visibility—
Dew point37°
Thu, 2261° / 41°0.02
61 °
Greenough, Thursday, 22 October
Light rain. High 61°, low 41°.
Pressure29.85 inHg
Wind3.6 mph SW
Humidity41%
Visibility—
Dew point31°
Fri, 2348° / 39°0.56
48 °
Greenough, Friday, 23 October
Rain. High 48°, low 39°.
Pressure29.97 inHg
Wind5.8 mph E
Humidity97%
Visibility—
Dew point40°
Sat, 2447° / 35°0.06
47 °
Greenough, Saturday, 24 October
Snow. High 47°, low 35°.
Pressure30.30 inHg
Wind3.6 mph E
Humidity56%
Visibility—
Dew point27°
Sun, 2553° / 30°0
53 °
Greenough, Sunday, 25 October
Clear. High 53°, low 30°.
Pressure30.15 inHg
Wind2.3 mph NE
Humidity51%
Visibility—
Dew point27°
Mon, 2653° / 31°0
53 °
Greenough, Monday, 26 October
Clear. High 53°, low 31°.
Pressure30.03 inHg
Wind1.7 mph W
Humidity56%
Visibility—
Dew point30°
Tue, 2754° / 31°0
54 °
Greenough, Tuesday, 27 October
Clear. High 54°, low 31°.
Pressure29.85 inHg
Wind1.2 mph NW
Humidity55%
Visibility—
Dew point30°
Wed, 2852° / 31°0
52 °
Greenough, Wednesday, 28 October
Clear. High 52°, low 31°.
Pressure29.83 inHg
Wind2.6 mph NW
Humidity46%
Visibility—
Dew point26°
Thu, 2952° / 34°0
52 °
Greenough, Thursday, 29 October
Overcast. High 52°, low 34°.
Pressure30.09 inHg
Wind2.4 mph NW
Humidity50%
Visibility—
Dew point28°
Fri, 3052° / 31°0
52 °
Greenough, Friday, 30 October
Clear. High 52°, low 31°.
Pressure30.21 inHg
Wind2.7 mph NE
Humidity53%
Visibility—
Dew point28°
Sat, 3153° / 29°0
53 °
Greenough, Saturday, 31 October
Clear. High 53°, low 29°.
Pressure30.09 inHg
Wind1.7 mph E
Humidity41%
Visibility—
Dew point21°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0147° / 30°0.08
47 °
Greenough, 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 °
Greenough, 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 °
Greenough, 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 °
Greenough, 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 °
Greenough, 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 °
Greenough, 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 °
Greenough, 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 °
Greenough, 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 °
Greenough, 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 °
Greenough, 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)
Wed, 1141° / 25°0.06
41 °
Greenough, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high41°
Average low25°
Average precipitation0.06 in
Chance of precipitation32%
Record high59° (2016)
Record low-9° (2000)
Thu, 1242° / 26°0.06
42 °
Greenough, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.06 in
Chance of precipitation42%
Record high63° (1999)
Record low-11° (1986)
Fri, 1342° / 27°0.07
42 °
Greenough, Friday, 13 November
Climate normal for this date — 60-year average.
Average high42°
Average low27°
Average precipitation0.07 in
Chance of precipitation43%
Record high60° (1999)
Record low2° (2000)
Sat, 1441° / 26°0.06
41 °
Greenough, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high41°
Average low26°
Average precipitation0.06 in
Chance of precipitation38%
Record high59° (2021)
Record low-1° (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 Greenough, 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 Greenough, 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.