Monthly outlook for Alder, MT: average high 53.5°, average low 36.2°. That is 1.1° above the climate normal for October. Precipitation is expected on 2 days (about 1.0 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 18 October (67.3°), the coolest 13 October (24.1°).
53.5°/36.2°
Average high / low
+1.1°
Above normal
2 / 4
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
50.4°
52.6°
-1.2°
21 October – 30 October
58.7°
47.9°
+6°
31 October – 9 November
at normal
41.9°
—
October records over 66 years
80.8°3 October 2010All-time high
-8.9°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Brandon (10 mi).
Mon, 1233° / 25°0.04
33 °
Alder, Monday, 12 October
Snow. High 33°, low 25°.
Pressure30.06 inHg
Wind1.3 mph SW
Humidity97%
Visibility—
Dew point28°
Tue, 1337° / 24°0
37 °
Alder, Tuesday, 13 October
Partly cloudy. High 37°, low 24°.
Pressure30.18 inHg
Wind2.7 mph W
Humidity93%
Visibility6.2 mi
Dew point29°
Wed, 1443° / 25°0
43 °
Alder, Wednesday, 14 October
Clear. High 43°, low 25°.
Pressure30.24 inHg
Wind1.4 mph W
Humidity75%
Visibility6.2 mi
Dew point28°
Thu, 1547° / 31°0
47 °
Alder, Thursday, 15 October
Clear. High 47°, low 31°.
Pressure30.56 inHg
Wind1.8 mph SE
Humidity62%
Visibility—
Dew point29°
Fri, 1660° / 34°0
60 °
Alder, Friday, 16 October
Clear. High 60°, low 34°.
Pressure30.45 inHg
Wind3.2 mph SE
Humidity47%
Visibility—
Dew point30°
Sat, 1762° / 41°0
62 °
Alder, Saturday, 17 October
Overcast. High 62°, low 41°.
Pressure30.15 inHg
Wind9.6 mph S
Humidity49%
Visibility—
Dew point36°
Sun, 1867° / 46°0
67 °
Alder, Sunday, 18 October
Partly cloudy. High 67°, low 46°.
Pressure30.00 inHg
Wind14.2 mph SW
Humidity35%
Visibility—
Dew point32°
Mon, 1964° / 47°0
64 °
Alder, Monday, 19 October
Overcast. High 64°, low 47°.
Pressure29.88 inHg
Wind17.6 mph SW
Humidity32%
Visibility—
Dew point29°
Tue, 2053° / 43°0
53 °
Alder, Tuesday, 20 October
Mostly clear. High 53°, low 43°.
Pressure30.00 inHg
Wind8.3 mph S
Humidity56%
Visibility—
Dew point33°
Wed, 2151° / 36°0
51 °
Alder, Wednesday, 21 October
Overcast. High 51°, low 36°.
Pressure30.06 inHg
Wind7.3 mph SE
Humidity41%
Visibility—
Dew point24°
Thu, 2256° / 36°0
56 °
Alder, Thursday, 22 October
Clear. High 56°, low 36°.
Pressure30.12 inHg
Wind6.7 mph W
Humidity32%
Visibility—
Dew point20°
Fri, 2362° / 41°0
62 °
Alder, Friday, 23 October
Partly cloudy. High 62°, low 41°.
Pressure30.00 inHg
Wind10.3 mph S
Humidity25%
Visibility—
Dew point20°
Sat, 2461° / 42°0
61 °
Alder, Saturday, 24 October
Overcast. High 61°, low 42°.
Pressure30.06 inHg
Wind6.7 mph W
Humidity37%
Visibility—
Dew point28°
Sun, 2558° / 37°0
58 °
Alder, Sunday, 25 October
Overcast. High 58°, low 37°.
Pressure30.33 inHg
Wind5.7 mph W
Humidity26%
Visibility—
Dew point17°
Mon, 2665° / 42°0
65 °
Alder, Monday, 26 October
Overcast. High 65°, low 42°.
Pressure30.06 inHg
Wind10 mph W
Humidity19%
Visibility—
Dew point14°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2747° / 28°0.03
47 °
Alder, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.03 in
Chance of precipitation17%
Record high62° (2024)
Record low5° (2019)
Wed, 2846° / 28°0.06
46 °
Alder, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high46°
Average low28°
Average precipitation0.06 in
Chance of precipitation28%
Record high64° (1987)
Record low1° (1991)
Thu, 2944° / 27°0.04
44 °
Alder, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high44°
Average low27°
Average precipitation0.04 in
Chance of precipitation27%
Record high66° (1964)
Record low-7° (1991)
Fri, 3043° / 26°0.04
43 °
Alder, Friday, 30 October
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.04 in
Chance of precipitation25%
Record high65° (1962)
Record low-9° (1991)
Sat, 3143° / 26°0.04
43 °
Alder, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.04 in
Chance of precipitation23%
Record high61° (2008)
Record low-5° (1996)
Sun, 0143° / 26°0.03
43 °
Alder, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.03 in
Chance of precipitation22%
Record high62° (2014)
Record low-4° (1991)
Mon, 0242° / 26°0.04
42 °
Alder, Monday, 2 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.04 in
Chance of precipitation25%
Record high58° (1965)
Record low-14° (1991)
Tue, 0343° / 26°0.04
43 °
Alder, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.04 in
Chance of precipitation17%
Record high61° (1962)
Record low-6° (1991)
Wed, 0444° / 26°0.04
44 °
Alder, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high44°
Average low26°
Average precipitation0.04 in
Chance of precipitation22%
Record high58° (1962)
Record low-10° (1973)
Thu, 0543° / 26°0.06
43 °
Alder, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.06 in
Chance of precipitation28%
Record high61° (2020)
Record low3° (2003)
Fri, 0642° / 26°0.04
42 °
Alder, Friday, 6 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.04 in
Chance of precipitation30%
Record high61° (1999)
Record low6° (2003)
Sat, 0741° / 25°0.04
41 °
Alder, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high41°
Average low25°
Average precipitation0.04 in
Chance of precipitation33%
Record high61° (1999)
Record low1° (2000)
Sun, 0840° / 24°0.06
40 °
Alder, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high40°
Average low24°
Average precipitation0.06 in
Chance of precipitation37%
Record high58° (1999)
Record low7° (2000)
Mon, 0939° / 23°0.04
39 °
Alder, Monday, 9 November
Climate normal for this date — 60-year average.
Average high39°
Average low23°
Average precipitation0.04 in
Chance of precipitation23%
Record high58° (2016)
Record low-1° (1986)
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 Alder, 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 Alder, 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.