Monthly outlook for Garneill, MT: average high 49.7°, average low 33°. That is 1.1° below the climate normal for October. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 17 October (68.7°), the coolest 25 October (23.2°).
49.7°/33°
Average high / low
−1.1°
Below normal
3 / 4
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
55.2°
53°
+1.2°
23 October – 1 November
40.7°
47.9°
-4°
2 November – 11 November
at normal
42.7°
—
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).
Wed, 1450° / 28°0
50 °
Garneill, Wednesday, 14 October
Clear. High 50°, low 28°.
Pressure30.06 inHg
Wind4.7 mph SE
Humidity64%
Visibility6.2 mi
Dew point31°
Thu, 1547° / 34°0
47 °
Garneill, Thursday, 15 October
Clear. High 47°, low 34°.
Pressure30.71 inHg
Wind2.8 mph N
Humidity67%
Visibility6.2 mi
Dew point27°
Fri, 1662° / 34°0
62 °
Garneill, Friday, 16 October
Clear. High 62°, low 34°.
Pressure30.39 inHg
Wind15.1 mph SE
Humidity44%
Visibility6.2 mi
Dew point28°
Sat, 1769° / 49°0
69 °
Garneill, Saturday, 17 October
Partly cloudy. High 69°, low 49°.
Pressure29.94 inHg
Wind10 mph S
Humidity26%
Visibility6.2 mi
Dew point27°
Sun, 1859° / 43°0
59 °
Garneill, Sunday, 18 October
Clear. High 59°, low 43°.
Pressure29.94 inHg
Wind14.1 mph S
Humidity41%
Visibility—
Dew point32°
Mon, 1965° / 40°0
65 °
Garneill, Monday, 19 October
Overcast. High 65°, low 40°.
Pressure29.83 inHg
Wind8.3 mph S
Humidity40%
Visibility—
Dew point34°
Tue, 2066° / 46°0
66 °
Garneill, Tuesday, 20 October
Overcast. High 66°, low 46°.
Pressure29.74 inHg
Wind12.5 mph NW
Humidity31%
Visibility—
Dew point30°
Wed, 2143° / 32°0.19
43 °
Garneill, Wednesday, 21 October
Snow. High 43°, low 32°.
Pressure29.80 inHg
Wind14.8 mph N
Humidity96%
Visibility—
Dew point35°
Thu, 2244° / 29°0.03
44 °
Garneill, Thursday, 22 October
Light rain. High 44°, low 29°.
Pressure29.65 inHg
Wind16.2 mph W
Humidity71%
Visibility—
Dew point31°
Fri, 2345° / 33°0.06
45 °
Garneill, Friday, 23 October
Snow. High 45°, low 33°.
Pressure29.80 inHg
Wind10.4 mph N
Humidity44%
Visibility—
Dew point22°
Sat, 2433° / 29°0.41
33 °
Garneill, Saturday, 24 October
Snow. High 33°, low 29°.
Pressure30.21 inHg
Wind6.9 mph S
Humidity99%
Visibility—
Dew point32°
Sun, 2536° / 23°0.02
36 °
Garneill, Sunday, 25 October
Light snow. High 36°, low 23°.
Pressure30.30 inHg
Wind7.4 mph S
Humidity90%
Visibility—
Dew point29°
Mon, 2638° / 27°0
38 °
Garneill, Monday, 26 October
Light snow. High 38°, low 27°.
Pressure30.21 inHg
Wind6.3 mph N
Humidity82%
Visibility—
Dew point29°
Tue, 2742° / 25°0
42 °
Garneill, Tuesday, 27 October
Mostly clear. High 42°, low 25°.
Pressure30.21 inHg
Wind6.8 mph S
Humidity69%
Visibility—
Dew point26°
Wed, 2850° / 29°0
50 °
Garneill, Wednesday, 28 October
Clear. High 50°, low 29°.
Pressure30.09 inHg
Wind3.2 mph S
Humidity40%
Visibility—
Dew point20°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2946° / 28°0.04
46 °
Garneill, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high46°
Average low28°
Average precipitation0.04 in
Chance of precipitation35%
Record high67° (1968)
Record low2° (1991)
Fri, 3046° / 27°0.03
46 °
Garneill, Friday, 30 October
Climate normal for this date — 60-year average.
Average high46°
Average low27°
Average precipitation0.03 in
Chance of precipitation23%
Record high64° (1987)
Record low3° (1991)
Sat, 3145° / 28°0.05
45 °
Garneill, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.05 in
Chance of precipitation18%
Record high64° (1987)
Record low-7° (2002)
Sun, 0145° / 28°0.04
45 °
Garneill, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.04 in
Chance of precipitation17%
Record high65° (2025)
Record low-2° (1991)
Mon, 0245° / 27°0.02
45 °
Garneill, Monday, 2 November
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.02 in
Chance of precipitation20%
Record high64° (1981)
Record low-10° (1991)
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)
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.