Monthly outlook for Garneill, MT: average high 52.3°, average low 35.4°. That is 1.6° above the climate normal for October. Precipitation is expected on 2 days (about 0.9 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 22 October (67.7°), the coolest 31 October (21.2°).
52.3°/35.4°
Average high / low
+1.6°
Above normal
2 / 4
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
57.1°
51.7°
+3°
28 October – 6 November
44.2°
45.2°
-0.5°
7 November – 16 November
at normal
40.9°
—
October records over 66 years
82.9°1 October 2011All-time high
-6.5°31 October 2002All-time low
Climate normals and records are computed from the nearest reference point — Judith Gap (5 mi).
Mon, 1968° / 41°0
68 °
Garneill, Monday, 19 October
Partly cloudy. High 68°, low 41°.
Pressure29.94 inHg
Wind11.2 mph S
Humidity36%
Visibility6.2 mi
Dew point34°
Tue, 2059° / 43°0
59 °
Garneill, Tuesday, 20 October
Overcast. High 59°, low 43°.
Pressure30.12 inHg
Wind5.7 mph N
Humidity55%
Visibility6.2 mi
Dew point38°
Wed, 2162° / 42°0
62 °
Garneill, Wednesday, 21 October
Clear. High 62°, low 42°.
Pressure30.06 inHg
Wind15.1 mph S
Humidity57%
Visibility6.2 mi
Dew point42°
Thu, 2268° / 46°0
68 °
Garneill, Thursday, 22 October
Clear. High 68°, low 46°.
Pressure29.88 inHg
Wind10.7 mph S
Humidity42%
Visibility6.2 mi
Dew point42°
Fri, 2355° / 46°0.3
55 °
Garneill, Friday, 23 October
Light rain. High 55°, low 46°.
Pressure29.62 inHg
Wind9.7 mph NW
Humidity90%
Visibility—
Dew point48°
Sat, 2445° / 34°0.03
45 °
Garneill, Saturday, 24 October
Light rain. High 45°, low 34°.
Pressure30.12 inHg
Wind8 mph NE
Humidity54%
Visibility—
Dew point29°
Sun, 2547° / 32°0
47 °
Garneill, Sunday, 25 October
Light rain. High 47°, low 32°.
Pressure30.09 inHg
Wind11.8 mph SE
Humidity53%
Visibility—
Dew point23°
Mon, 2649° / 32°0
49 °
Garneill, Monday, 26 October
Clear. High 49°, low 32°.
Pressure30.06 inHg
Wind11.3 mph S
Humidity58%
Visibility—
Dew point29°
Tue, 2760° / 37°0
60 °
Garneill, Tuesday, 27 October
Mostly clear. High 60°, low 37°.
Pressure29.74 inHg
Wind10.5 mph SE
Humidity32%
Visibility—
Dew point23°
Wed, 2856° / 43°0.02
56 °
Garneill, Wednesday, 28 October
Light rain. High 56°, low 43°.
Pressure29.56 inHg
Wind10.9 mph S
Humidity39%
Visibility—
Dew point28°
Thu, 2941° / 26°0.48
41 °
Garneill, Thursday, 29 October
Snow. High 41°, low 26°.
Pressure29.47 inHg
Wind26.3 mph NW
Humidity94%
Visibility—
Dew point33°
Fri, 3036° / 22°0.04
36 °
Garneill, Friday, 30 October
Light snow. High 36°, low 22°.
Pressure29.94 inHg
Wind26.8 mph NW
Humidity54%
Visibility—
Dew point15°
Sat, 3141° / 21°0
41 °
Garneill, Saturday, 31 October
Overcast. High 41°, low 21°.
Pressure29.91 inHg
Wind6.4 mph W
Humidity62%
Visibility—
Dew point24°
Sun, 0145° / 28°0.03
45 °
Garneill, Sunday, 1 November
Light snow. High 45°, low 28°.
Pressure29.80 inHg
Wind9.6 mph SW
Humidity68%
Visibility—
Dew point30°
Mon, 0247° / 35°0.01
47 °
Garneill, Monday, 2 November
Light rain. High 47°, low 35°.
Pressure29.47 inHg
Wind13.4 mph NW
Humidity63%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0345° / 28°0.04
45 °
Garneill, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.04 in
Chance of precipitation25%
Record high64° (1962)
Record low3° (1991)
Wed, 0445° / 28°0.05
45 °
Garneill, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.05 in
Chance of precipitation25%
Record high62° (2001)
Record low5° (1967)
Thu, 0544° / 28°0.06
44 °
Garneill, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.06 in
Chance of precipitation32%
Record high65° (1980)
Record low-1° (2003)
Fri, 0644° / 27°0.03
44 °
Garneill, Friday, 6 November
Climate normal for this date — 60-year average.
Average high44°
Average low27°
Average precipitation0.03 in
Chance of precipitation22%
Record high64° (2010)
Record low2° (2017)
Sat, 0743° / 27°0.03
43 °
Garneill, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high43°
Average low27°
Average precipitation0.03 in
Chance of precipitation30%
Record high64° (1999)
Record low3° (2017)
Sun, 0842° / 26°0.06
42 °
Garneill, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.06 in
Chance of precipitation30%
Record high62° (1999)
Record low0° (2022)
Mon, 0941° / 24°0.05
41 °
Garneill, Monday, 9 November
Climate normal for this date — 60-year average.
Average high41°
Average low24°
Average precipitation0.05 in
Chance of precipitation27%
Record high64° (2016)
Record low-2° (1986)
Tue, 1040° / 23°0.04
40 °
Garneill, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high40°
Average low23°
Average precipitation0.04 in
Chance of precipitation23%
Record high59° (2025)
Record low-8° (1986)
Wed, 1139° / 22°0.03
39 °
Garneill, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high39°
Average low22°
Average precipitation0.03 in
Chance of precipitation23%
Record high63° (1990)
Record low-7° (2019)
Thu, 1241° / 23°0.04
41 °
Garneill, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high41°
Average low23°
Average precipitation0.04 in
Chance of precipitation27%
Record high65° (1999)
Record low-17° (1986)
Fri, 1341° / 25°0.04
41 °
Garneill, Friday, 13 November
Climate normal for this date — 60-year average.
Average high41°
Average low25°
Average precipitation0.04 in
Chance of precipitation20%
Record high63° (1999)
Record low-2° (1986)
Sat, 1441° / 24°0.03
41 °
Garneill, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high41°
Average low24°
Average precipitation0.03 in
Chance of precipitation25%
Record high63° (1999)
Record low-1° (1978)
Sun, 1541° / 24°0.03
41 °
Garneill, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high41°
Average low24°
Average precipitation0.03 in
Chance of precipitation20%
Record high60° (1999)
Record low1° (2014)
Mon, 1641° / 24°0.03
41 °
Garneill, Monday, 16 November
Climate normal for this date — 60-year average.
Average high41°
Average low24°
Average precipitation0.03 in
Chance of precipitation22%
Record high57° (2001)
Record low4° (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 Garneill, 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 Garneill, 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.