As of 08:34 MDT

Weather in Chapman, MT

54°

Chapman, Friday, 9 October, 08:34

Overcast. Feels like 52°. High 80°, low 49°.

Pressure29.56 inHg

Wind8.5 mph SW

Humidity57%

Visibility6.2 mi

Dew point40°

See detailed hourly forecast

Monthly outlook for Chapman, MT: average high 53.5°, average low 36.7°. That is 0.2° below the climate normal for October. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 9 October (79.5°), the coolest 16 October (29.5°).

53.5°/36.7°

Average high / low

−0.2°

Below normal

2 / 2

Wet days / normal

0.5 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 October – 18 October	51.5°	54.5°	-1.7°
19 October – 28 October	56.7°	51.2°	+3.1°
29 October – 7 November	at normal	44.5°	—

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).

Sat, 1053° / 39°

53 °

Chapman, Saturday, 10 October

Overcast. High 53°, low 39°.

Pressure29.74 inHg

Wind11.5 mph N

Humidity74%

Visibility6.2 mi

Dew point41°

Sun, 1141° / 34°

0.2

41 °

Chapman, Sunday, 11 October

Snow. High 41°, low 34°.

Pressure30.18 inHg

Wind13.6 mph NE

Humidity86%

Visibility4.8 mi

Dew point30°

Mon, 1236° / 33°

0.27

36 °

Chapman, Monday, 12 October

Snow. High 36°, low 33°.

Pressure30.21 inHg

Wind5.1 mph NE

Humidity92%

Visibility4.9 mi

Dew point32°

Tue, 1346° / 31°

46 °

Chapman, Tuesday, 13 October

Mostly clear. High 46°, low 31°.

Pressure30.15 inHg

Wind7.4 mph S

Humidity74%

Visibility—

Dew point31°

Wed, 1458° / 31°

58 °

Chapman, Wednesday, 14 October

Clear. High 58°, low 31°.

Pressure29.94 inHg

Wind12.7 mph SW

Humidity47%

Visibility—

Dew point30°

Thu, 1545° / 37°

45 °

Chapman, Thursday, 15 October

Overcast. High 45°, low 37°.

Pressure30.27 inHg

Wind31.5 mph NW

Humidity49%

Visibility—

Dew point26°

Fri, 1642° / 29°

42 °

Chapman, Friday, 16 October

Clear. High 42°, low 29°.

Pressure30.65 inHg

Wind23.8 mph NW

Humidity43%

Visibility—

Dew point16°

Sat, 1756° / 32°

56 °

Chapman, Saturday, 17 October

Overcast. High 56°, low 32°.

Pressure30.03 inHg

Wind17.6 mph NW

Humidity33%

Visibility—

Dew point19°

Sun, 1858° / 40°

58 °

Chapman, Sunday, 18 October

Overcast. High 58°, low 40°.

Pressure30.06 inHg

Wind12.3 mph S

Humidity30%

Visibility—

Dew point22°

Mon, 1966° / 41°

66 °

Chapman, Monday, 19 October

Overcast. High 66°, low 41°.

Pressure29.80 inHg

Wind10.3 mph S

Humidity32%

Visibility—

Dew point25°

Tue, 2056° / 42°

56 °

Chapman, Tuesday, 20 October

Partly cloudy. High 56°, low 42°.

Pressure30.09 inHg

Wind12.3 mph NW

Humidity41%

Visibility—

Dew point28°

Wed, 2162° / 42°

0.03

62 °

Chapman, Wednesday, 21 October

Light rain. High 62°, low 42°.

Pressure29.77 inHg

Wind27.8 mph NW

Humidity25%

Visibility—

Dew point21°

Thu, 2245° / 36°

45 °

Chapman, Thursday, 22 October

Overcast. High 45°, low 36°.

Pressure30.45 inHg

Wind29.1 mph NW

Humidity63%

Visibility—

Dew point28°

Fri, 2351° / 32°

51 °

Chapman, Friday, 23 October

Mostly clear. High 51°, low 32°.

Pressure30.21 inHg

Wind17.7 mph SE

Humidity45%

Visibility—

Dew point23°

Sat, 2462° / 38°

62 °

Chapman, Saturday, 24 October

Partly cloudy. High 62°, low 38°.

Pressure29.97 inHg

Wind7.5 mph SE

Humidity27%

Visibility—

Dew point21°

From day 17 onward the outlook is built from 60-year climate statistics

Sun, 2551° / 34°

0.01

51 °

Chapman, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high51°

Average low34°

Average precipitation0.01 in

Chance of precipitation12%

Record high71° (1990)

Record low0° (2020)

Mon, 2649° / 33°

0.04

49 °

Chapman, Monday, 26 October

Climate normal for this date — 60-year average.

Average high49°

Average low33°

Average precipitation0.04 in

Chance of precipitation20%

Record high71° (1983)

Record low4° (2020)

Tue, 2748° / 31°

0.03

48 °

Chapman, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high48°

Average low31°

Average precipitation0.03 in

Chance of precipitation17%

Record high67° (2024)

Record low12° (1984)

Wed, 2847° / 30°

0.02

47 °

Chapman, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high47°

Average low30°

Average precipitation0.02 in

Chance of precipitation7%

Record high71° (1968)

Record low-2° (1984)

Thu, 2946° / 29°

0.03

46 °

Chapman, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high46°

Average low29°

Average precipitation0.03 in

Chance of precipitation13%

Record high71° (1968)

Record low-4° (1991)

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)

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.