Monthly outlook for Halfmoon, MT: average high 53.4°, average low 35.2°. That is 0.9° above the climate normal for October. Precipitation is expected on 3 days (about 0.3 inches), against a normal of 6 days and 1.6 inches. The warmest day looks like 24 October (64.1°), the coolest 12 October (25.7°).
53.4°/35.2°
Average high / low
+0.9°
Above normal
3 / 6
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
50.8°
52.8°
-1.1°
20 October – 29 October
57.7°
48.3°
+5.2°
30 October – 8 November
at normal
42.5°
—
October records over 66 years
81.3°1 October 1992All-time high
-0.9°25 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Martin City (10 mi).
Sun, 1138° / 29°0.11
38 °
Halfmoon, Sunday, 11 October
Light snow. High 38°, low 29°.
Pressure30.09 inHg
Wind9.5 mph NE
Humidity82%
Visibility3.5 mi
Dew point24°
Mon, 1243° / 26°0
43 °
Halfmoon, Monday, 12 October
Partly cloudy. High 43°, low 26°.
Pressure30.09 inHg
Wind0.6 mph S
Humidity70%
Visibility6.2 mi
Dew point26°
Tue, 1348° / 32°0
48 °
Halfmoon, Tuesday, 13 October
Clear. High 48°, low 32°.
Pressure30.15 inHg
Wind2.6 mph S
Humidity67%
Visibility6.2 mi
Dew point32°
Wed, 1450° / 36°0
50 °
Halfmoon, Wednesday, 14 October
Overcast. High 50°, low 36°.
Pressure30.24 inHg
Wind3.5 mph S
Humidity66%
Visibility—
Dew point36°
Thu, 1558° / 37°0
58 °
Halfmoon, Thursday, 15 October
Clear. High 58°, low 37°.
Pressure30.47 inHg
Wind3.1 mph NE
Humidity63%
Visibility—
Dew point38°
Fri, 1650° / 36°0
50 °
Halfmoon, Friday, 16 October
Overcast. High 50°, low 36°.
Pressure30.59 inHg
Wind2.6 mph S
Humidity42%
Visibility—
Dew point23°
Sat, 1751° / 29°0
51 °
Halfmoon, Saturday, 17 October
Overcast. High 51°, low 29°.
Pressure30.36 inHg
Wind1.9 mph SW
Humidity44%
Visibility—
Dew point22°
Sun, 1863° / 36°0
63 °
Halfmoon, Sunday, 18 October
Partly cloudy. High 63°, low 36°.
Pressure30.06 inHg
Wind13.2 mph SW
Humidity38%
Visibility—
Dew point26°
Mon, 1960° / 39°0
60 °
Halfmoon, Monday, 19 October
Overcast. High 60°, low 39°.
Pressure30.06 inHg
Wind3.8 mph SE
Humidity48%
Visibility—
Dew point32°
Tue, 2053° / 42°0.07
53 °
Halfmoon, Tuesday, 20 October
Light rain. High 53°, low 42°.
Pressure29.91 inHg
Wind17.9 mph SW
Humidity62%
Visibility—
Dew point36°
Wed, 2153° / 34°0
53 °
Halfmoon, Wednesday, 21 October
Light rain. High 53°, low 34°.
Pressure30.21 inHg
Wind6.2 mph S
Humidity53%
Visibility—
Dew point30°
Thu, 2252° / 33°0
52 °
Halfmoon, Thursday, 22 October
Partly cloudy. High 52°, low 33°.
Pressure30.45 inHg
Wind2.6 mph N
Humidity57%
Visibility—
Dew point30°
Fri, 2359° / 35°0
59 °
Halfmoon, Friday, 23 October
Partly cloudy. High 59°, low 35°.
Pressure30.21 inHg
Wind2.8 mph S
Humidity41%
Visibility—
Dew point27°
Sat, 2464° / 41°0
64 °
Halfmoon, Saturday, 24 October
Partly cloudy. High 64°, low 41°.
Pressure30.03 inHg
Wind2.7 mph SW
Humidity44%
Visibility—
Dew point33°
Sun, 2564° / 42°0
64 °
Halfmoon, Sunday, 25 October
Overcast. High 64°, low 42°.
Pressure30.09 inHg
Wind2.5 mph N
Humidity47%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2647° / 34°0.13
47 °
Halfmoon, Monday, 26 October
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.13 in
Chance of precipitation48%
Record high64° (1986)
Record low13° (2023)
Tue, 2746° / 33°0.1
46 °
Halfmoon, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.1 in
Chance of precipitation43%
Record high59° (1998)
Record low15° (1971)
Wed, 2846° / 33°0.11
46 °
Halfmoon, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.11 in
Chance of precipitation47%
Record high61° (1974)
Record low-1° (1971)
Thu, 2944° / 31°0.12
44 °
Halfmoon, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.12 in
Chance of precipitation45%
Record high61° (1962)
Record low5° (1991)
Fri, 3044° / 31°0.09
44 °
Halfmoon, Friday, 30 October
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.09 in
Chance of precipitation43%
Record high61° (1987)
Record low1° (1991)
Sat, 3144° / 31°0.16
44 °
Halfmoon, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.16 in
Chance of precipitation55%
Record high64° (2008)
Record low4° (1984)
Sun, 0144° / 31°0.14
44 °
Halfmoon, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.14 in
Chance of precipitation45%
Record high60° (2008)
Record low1° (1991)
Mon, 0243° / 31°0.15
43 °
Halfmoon, Monday, 2 November
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.15 in
Chance of precipitation47%
Record high59° (1981)
Record low-3° (1991)
Tue, 0343° / 32°0.09
43 °
Halfmoon, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.09 in
Chance of precipitation43%
Record high60° (2020)
Record low7° (1973)
Wed, 0443° / 32°0.18
43 °
Halfmoon, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.18 in
Chance of precipitation58%
Record high58° (1975)
Record low7° (1973)
Thu, 0542° / 31°0.12
42 °
Halfmoon, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high42°
Average low31°
Average precipitation0.12 in
Chance of precipitation53%
Record high59° (2010)
Record low8° (1993)
Fri, 0641° / 29°0.15
41 °
Halfmoon, Friday, 6 November
Climate normal for this date — 60-year average.
Average high41°
Average low29°
Average precipitation0.15 in
Chance of precipitation55%
Record high58° (2010)
Record low7° (1990)
Sat, 0741° / 29°0.17
41 °
Halfmoon, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high41°
Average low29°
Average precipitation0.17 in
Chance of precipitation55%
Record high55° (1999)
Record low8° (2022)
Sun, 0841° / 29°0.12
41 °
Halfmoon, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high41°
Average low29°
Average precipitation0.12 in
Chance of precipitation53%
Record high57° (2016)
Record low1° (2022)
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 Halfmoon, 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 Halfmoon, 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.