Monthly outlook for Chapman, MT: average high 56.7°, average low 39.5°. That is 2.8° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 17 October (71.3°), the coolest 16 October (32.4°).
56.7°/39.5°
Average high / low
+2.8°
Above normal
0 / 2
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 October – 23 October
58.6°
53.4°
+2.9°
24 October – 2 November
53.6°
47.3°
+3.5°
3 November – 12 November
at normal
41.2°
—
October records over 66 years
84.6°1 October 1992All-time high
-10.8°30 October 1984All-time low
Climate normals and records are computed from the nearest reference point — Caldwell (7 mi).
Thu, 1548° / 33°0
48 °
Chapman, Thursday, 15 October
Clear. High 48°, low 33°.
Pressure30.65 inHg
Wind18.6 mph NW
Humidity59%
Visibility6.2 mi
Dew point27°
Fri, 1659° / 32°0
59 °
Chapman, Friday, 16 October
Clear. High 59°, low 32°.
Pressure30.42 inHg
Wind14.1 mph S
Humidity49%
Visibility6.2 mi
Dew point27°
Sat, 1771° / 49°0
71 °
Chapman, Saturday, 17 October
Partly cloudy. High 71°, low 49°.
Pressure29.85 inHg
Wind17.9 mph SW
Humidity28%
Visibility6.2 mi
Dew point32°
Sun, 1856° / 39°0
56 °
Chapman, Sunday, 18 October
Partly cloudy. High 56°, low 39°.
Pressure30.18 inHg
Wind15.1 mph NW
Humidity40%
Visibility—
Dew point27°
Mon, 1960° / 39°0
60 °
Chapman, Monday, 19 October
Overcast. High 60°, low 39°.
Pressure29.94 inHg
Wind10.3 mph SE
Humidity49%
Visibility—
Dew point33°
Tue, 2055° / 45°0
55 °
Chapman, Tuesday, 20 October
Overcast. High 55°, low 45°.
Pressure30.03 inHg
Wind14.3 mph NW
Humidity31%
Visibility—
Dew point22°
Wed, 2156° / 39°0
56 °
Chapman, Wednesday, 21 October
Clear. High 56°, low 39°.
Pressure30.15 inHg
Wind20 mph SE
Humidity44%
Visibility—
Dew point27°
Thu, 2265° / 43°0
65 °
Chapman, Thursday, 22 October
Clear. High 65°, low 43°.
Pressure29.80 inHg
Wind15.2 mph SE
Humidity39%
Visibility—
Dew point31°
Fri, 2356° / 43°0
56 °
Chapman, Friday, 23 October
Overcast. High 56°, low 43°.
Pressure30.06 inHg
Wind21.7 mph NW
Humidity50%
Visibility—
Dew point34°
Sat, 2447° / 34°0
47 °
Chapman, Saturday, 24 October
Clear. High 47°, low 34°.
Pressure30.45 inHg
Wind13.3 mph NW
Humidity41%
Visibility—
Dew point20°
Sun, 2556° / 37°0
56 °
Chapman, Sunday, 25 October
Partly cloudy. High 56°, low 37°.
Pressure30.00 inHg
Wind14.5 mph SE
Humidity32%
Visibility—
Dew point21°
Mon, 2657° / 41°0
57 °
Chapman, Monday, 26 October
Overcast. High 57°, low 41°.
Pressure29.83 inHg
Wind13.8 mph SE
Humidity37%
Visibility—
Dew point24°
Tue, 2749° / 40°0
49 °
Chapman, Tuesday, 27 October
Overcast. High 49°, low 40°.
Pressure29.80 inHg
Wind12.3 mph N
Humidity44%
Visibility—
Dew point27°
Wed, 2859° / 37°0
59 °
Chapman, Wednesday, 28 October
Mostly clear. High 59°, low 37°.
Pressure29.65 inHg
Wind21.9 mph S
Humidity47%
Visibility—
Dew point29°
Thu, 2954° / 49°0
54 °
Chapman, Thursday, 29 October
Overcast. High 54°, low 49°.
Pressure29.59 inHg
Wind20.8 mph W
Humidity30%
Visibility—
Dew point22°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 3046° / 28°0.02
46 °
Chapman, Friday, 30 October
Climate normal for this date — 60-year average.
Average high46°
Average low28°
Average precipitation0.02 in
Chance of precipitation13%
Record high66° (1983)
Record low-11° (1984)
Sat, 3145° / 29°0.03
45 °
Chapman, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.03 in
Chance of precipitation15%
Record high65° (1990)
Record low-6° (1984)
Sun, 0145° / 29°0.01
45 °
Chapman, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.01 in
Chance of precipitation12%
Record high66° (2025)
Record low-14° (1984)
Mon, 0244° / 28°0.02
44 °
Chapman, Monday, 2 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.02 in
Chance of precipitation12%
Record high66° (1965)
Record low-8° (1991)
Tue, 0345° / 29°0.03
45 °
Chapman, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.03 in
Chance of precipitation20%
Record high63° (2020)
Record low-15° (1991)
Wed, 0445° / 29°0.02
45 °
Chapman, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.02 in
Chance of precipitation13%
Record high67° (1975)
Record low4° (2017)
Thu, 0544° / 28°0.03
44 °
Chapman, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.03 in
Chance of precipitation17%
Record high66° (2020)
Record low-12° (2003)
Fri, 0642° / 26°0.02
42 °
Chapman, Friday, 6 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.02 in
Chance of precipitation17%
Record high64° (2010)
Record low-6° (1991)
Sat, 0742° / 27°0.02
42 °
Chapman, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high42°
Average low27°
Average precipitation0.02 in
Chance of precipitation17%
Record high66° (2010)
Record low-2° (1991)
Sun, 0841° / 25°0.04
41 °
Chapman, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high41°
Average low25°
Average precipitation0.04 in
Chance of precipitation27%
Record high62° (1999)
Record low-6° (1973)
Mon, 0938° / 24°0.05
38 °
Chapman, Monday, 9 November
Climate normal for this date — 60-year average.
Average high38°
Average low24°
Average precipitation0.05 in
Chance of precipitation22%
Record high62° (2016)
Record low0° (1986)
Tue, 1038° / 22°0.02
38 °
Chapman, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high38°
Average low22°
Average precipitation0.02 in
Chance of precipitation22%
Record high61° (2025)
Record low-2° (2022)
Wed, 1138° / 22°0.02
38 °
Chapman, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high38°
Average low22°
Average precipitation0.02 in
Chance of precipitation13%
Record high59° (1981)
Record low-10° (2019)
Thu, 1239° / 22°0.03
39 °
Chapman, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high39°
Average low22°
Average precipitation0.03 in
Chance of precipitation15%
Record high70° (1999)
Record low-7° (2014)
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 Chapman, 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 Chapman, 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.