Monthly outlook for Amherst, MT: average high 58.5°, average low 39.5°. That is 5.6° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 7 November (78.5°), the coolest 24 October (23.5°).
58.5°/39.5°
Average high / low
+5.6°
Above normal
1 / 4
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
50.6°
49.7°
+0.5°
3 November – 12 November
71.7°
44.8°
+15°
13 November – 22 November
at normal
41.8°
—
October records over 66 years
87.4°1 October 2011All-time high
-16.4°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Lewistown (11 mi).
Sun, 2544° / 25°0
44 °
Amherst, Sunday, 25 October
Clear. High 44°, low 25°.
Pressure30.47 inHg
Wind0.6 mph N
Humidity78%
Visibility6.2 mi
Dew point25°
Mon, 2649° / 31°0
49 °
Amherst, Monday, 26 October
Partly cloudy. High 49°, low 31°.
Pressure30.15 inHg
Wind3.1 mph SE
Humidity68%
Visibility6.2 mi
Dew point33°
Tue, 2751° / 32°0.06
51 °
Amherst, Tuesday, 27 October
Light rain. High 51°, low 32°.
Pressure29.94 inHg
Wind13.4 mph W
Humidity58%
Visibility6.2 mi
Dew point30°
Wed, 2854° / 36°0
54 °
Amherst, Wednesday, 28 October
Clear. High 54°, low 36°.
Pressure29.94 inHg
Wind6.5 mph S
Humidity50%
Visibility—
Dew point31°
Thu, 2951° / 34°0
51 °
Amherst, Thursday, 29 October
Overcast. High 51°, low 34°.
Pressure29.91 inHg
Wind10.2 mph SW
Humidity58%
Visibility—
Dew point32°
Fri, 3053° / 38°0
53 °
Amherst, Friday, 30 October
Partly cloudy. High 53°, low 38°.
Pressure29.94 inHg
Wind8.3 mph S
Humidity43%
Visibility—
Dew point25°
Sat, 3150° / 37°0
50 °
Amherst, Saturday, 31 October
Clear. High 50°, low 37°.
Pressure29.94 inHg
Wind21.5 mph NW
Humidity20%
Visibility—
Dew point9°
Sun, 0155° / 33°0
55 °
Amherst, Sunday, 1 November
Clear. High 55°, low 33°.
Pressure30.24 inHg
Wind7.4 mph S
Humidity18%
Visibility—
Dew point6°
Mon, 0251° / 39°0
51 °
Amherst, Monday, 2 November
Overcast. High 51°, low 39°.
Pressure30.33 inHg
Wind7.6 mph S
Humidity22%
Visibility—
Dew point10°
Tue, 0367° / 41°0
67 °
Amherst, Tuesday, 3 November
Partly cloudy. High 67°, low 41°.
Pressure29.91 inHg
Wind13.7 mph NW
Humidity15%
Visibility—
Dew point12°
Wed, 0474° / 48°0
74 °
Amherst, Wednesday, 4 November
Partly cloudy. High 74°, low 48°.
Pressure29.77 inHg
Wind8.8 mph W
Humidity16%
Visibility—
Dew point17°
Thu, 0569° / 51°0
69 °
Amherst, Thursday, 5 November
Overcast. High 69°, low 51°.
Pressure29.77 inHg
Wind20.9 mph W
Humidity28%
Visibility—
Dew point28°
Fri, 0669° / 55°0
69 °
Amherst, Friday, 6 November
Overcast. High 69°, low 55°.
Pressure30.09 inHg
Wind22.3 mph W
Humidity39%
Visibility—
Dew point40°
Sat, 0778° / 53°0
78 °
Amherst, Saturday, 7 November
Partly cloudy. High 78°, low 53°.
Pressure30.12 inHg
Wind7.8 mph S
Humidity24%
Visibility—
Dew point31°
Sun, 0872° / 55°0
72 °
Amherst, Sunday, 8 November
Partly cloudy. High 72°, low 55°.
Pressure29.94 inHg
Wind7.7 mph S
Humidity18%
Visibility—
Dew point24°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0943° / 26°0.05
43 °
Amherst, Monday, 9 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.05 in
Chance of precipitation22%
Record high69° (2016)
Record low-4° (2022)
Tue, 1042° / 26°0.04
42 °
Amherst, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.04 in
Chance of precipitation22%
Record high64° (2025)
Record low-8° (1986)
Wed, 1142° / 24°0.03
42 °
Amherst, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high42°
Average low24°
Average precipitation0.03 in
Chance of precipitation22%
Record high67° (1990)
Record low-8° (2012)
Thu, 1244° / 25°0.04
44 °
Amherst, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high44°
Average low25°
Average precipitation0.04 in
Chance of precipitation23%
Record high70° (1990)
Record low-22° (1986)
Fri, 1343° / 26°0.04
43 °
Amherst, Friday, 13 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.04 in
Chance of precipitation22%
Record high65° (2025)
Record low-8° (1986)
Sat, 1444° / 26°0.04
44 °
Amherst, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high44°
Average low26°
Average precipitation0.04 in
Chance of precipitation27%
Record high67° (1999)
Record low-2° (2014)
Sun, 1544° / 26°0.03
44 °
Amherst, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high44°
Average low26°
Average precipitation0.03 in
Chance of precipitation18%
Record high65° (1999)
Record low-9° (2014)
Mon, 1644° / 27°0.03
44 °
Amherst, Monday, 16 November
Climate normal for this date — 60-year average.
Average high44°
Average low27°
Average precipitation0.03 in
Chance of precipitation22%
Record high64° (2001)
Record low-1° (2000)
Tue, 1742° / 26°0.04
42 °
Amherst, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.04 in
Chance of precipitation32%
Record high63° (1976)
Record low2° (2022)
Wed, 1842° / 25°0.04
42 °
Amherst, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high42°
Average low25°
Average precipitation0.04 in
Chance of precipitation23%
Record high64° (2008)
Record low-4° (2022)
Thu, 1940° / 24°0.05
40 °
Amherst, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high40°
Average low24°
Average precipitation0.05 in
Chance of precipitation20%
Record high59° (1989)
Record low-6° (1985)
Fri, 2041° / 24°0.02
41 °
Amherst, Friday, 20 November
Climate normal for this date — 60-year average.
Average high41°
Average low24°
Average precipitation0.02 in
Chance of precipitation25%
Record high58° (2005)
Record low-24° (1985)
Sat, 2140° / 22°0.02
40 °
Amherst, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high40°
Average low22°
Average precipitation0.02 in
Chance of precipitation15%
Record high61° (2002)
Record low-26° (1977)
Sun, 2238° / 22°0.03
38 °
Amherst, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high38°
Average low22°
Average precipitation0.03 in
Chance of precipitation28%
Record high61° (2021)
Record low-23° (1985)
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 Amherst, 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 Amherst, 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.