Monthly outlook for Cottonwood, MT: average high 81°, average low 55.9°. That is 1.1° above the climate normal for August. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 4 days and 1.0 inches. The warmest day looks like 17 August (87°), the coolest 24 August (45.8°).
81°/55.9°
Average high / low
+1.1°
Above normal
4 / 4
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
82.7°
79.3°
+1.9°
19 August – 28 August
78.1°
77.9°
+0.1°
29 August – 7 September
at normal
75.1°
—
August records over 66 years
99.5°11 August 2018All-time high
31.6°25 August 1992All-time low
Climate normals and records are computed from the nearest reference point — Lewistown (4 mi).
Mon, 1084° / 49°0
84 °
Cottonwood, Monday, 10 August
Clear. High 84°, low 49°.
Pressure29.80 inHg
Wind3.2 mph W
Humidity19%
Visibility6.2 mi
Dew point38°
Tue, 1186° / 61°0
86 °
Cottonwood, Tuesday, 11 August
Clear. High 86°, low 61°.
Pressure29.88 inHg
Wind9 mph NW
Humidity20%
Visibility6.2 mi
Dew point37°
Wed, 1283° / 58°0
83 °
Cottonwood, Wednesday, 12 August
Overcast. High 83°, low 58°.
Pressure29.88 inHg
Wind11.5 mph NE
Humidity27%
Visibility6.2 mi
Dew point43°
Thu, 1384° / 61°0.08
84 °
Cottonwood, Thursday, 13 August
Light rain. High 84°, low 61°.
Pressure29.74 inHg
Wind16.6 mph W
Humidity26%
Visibility—
Dew point43°
Fri, 1464° / 56°0.09
64 °
Cottonwood, Friday, 14 August
Light rain. High 64°, low 56°.
Pressure30.03 inHg
Wind6.9 mph NW
Humidity82%
Visibility—
Dew point53°
Sat, 1584° / 54°0
84 °
Cottonwood, Saturday, 15 August
Partly cloudy. High 84°, low 54°.
Pressure30.06 inHg
Wind8.6 mph SW
Humidity36%
Visibility—
Dew point45°
Sun, 1687° / 61°0.01
87 °
Cottonwood, Sunday, 16 August
Light rain. High 87°, low 61°.
Pressure29.85 inHg
Wind11.6 mph W
Humidity25%
Visibility—
Dew point44°
Mon, 1787° / 61°0
87 °
Cottonwood, Monday, 17 August
Light rain. High 87°, low 61°.
Pressure29.85 inHg
Wind11 mph NW
Humidity26%
Visibility—
Dew point41°
Tue, 1885° / 59°0
85 °
Cottonwood, Tuesday, 18 August
Partly cloudy. High 85°, low 59°.
Pressure29.77 inHg
Wind16.9 mph W
Humidity20%
Visibility—
Dew point36°
Wed, 1978° / 57°0
78 °
Cottonwood, Wednesday, 19 August
Partly cloudy. High 78°, low 57°.
Pressure29.97 inHg
Wind8.3 mph N
Humidity29%
Visibility—
Dew point38°
Thu, 2086° / 55°0
86 °
Cottonwood, Thursday, 20 August
Mostly clear. High 86°, low 55°.
Pressure29.88 inHg
Wind7.8 mph SW
Humidity25%
Visibility—
Dew point38°
Fri, 2186° / 60°0.3
86 °
Cottonwood, Friday, 21 August
Rain. High 86°, low 60°.
Pressure29.74 inHg
Wind13.1 mph W
Humidity24%
Visibility—
Dew point42°
Sat, 2274° / 56°0.76
74 °
Cottonwood, Saturday, 22 August
Heavy rain. High 74°, low 56°.
Pressure29.80 inHg
Wind16.9 mph W
Humidity45%
Visibility—
Dew point49°
Sun, 2370° / 51°0
70 °
Cottonwood, Sunday, 23 August
Clear. High 70°, low 51°.
Pressure29.91 inHg
Wind12.3 mph N
Humidity34%
Visibility—
Dew point38°
Mon, 2474° / 46°0
74 °
Cottonwood, Monday, 24 August
Overcast. High 74°, low 46°.
Pressure29.97 inHg
Wind15.6 mph E
Humidity45%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2577° / 54°0.05
77 °
Cottonwood, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high77°
Average low54°
Average precipitation0.05 in
Chance of precipitation18%
Record high96° (2008)
Record low32° (1992)
Wed, 2678° / 54°0.03
78 °
Cottonwood, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high78°
Average low54°
Average precipitation0.03 in
Chance of precipitation18%
Record high92° (2010)
Record low39° (1992)
Thu, 2778° / 54°0.04
78 °
Cottonwood, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low54°
Average precipitation0.04 in
Chance of precipitation22%
Record high92° (1996)
Record low42° (2004)
Fri, 2878° / 54°0.05
78 °
Cottonwood, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low54°
Average precipitation0.05 in
Chance of precipitation27%
Record high96° (2012)
Record low40° (1960)
Sat, 2978° / 54°0.04
78 °
Cottonwood, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low54°
Average precipitation0.04 in
Chance of precipitation18%
Record high92° (2005)
Record low40° (1965)
Sun, 3077° / 54°0.06
77 °
Cottonwood, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low54°
Average precipitation0.06 in
Chance of precipitation22%
Record high91° (2007)
Record low38° (1993)
Mon, 3175° / 53°0.06
75 °
Cottonwood, Monday, 31 August
Climate normal for this date — 60-year average.
Average high75°
Average low53°
Average precipitation0.06 in
Chance of precipitation27%
Record high94° (1991)
Record low37° (1965)
Tue, 0176° / 52°0.06
76 °
Cottonwood, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high76°
Average low52°
Average precipitation0.06 in
Chance of precipitation20%
Record high92° (1983)
Record low41° (1972)
Wed, 0276° / 53°0.03
76 °
Cottonwood, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high76°
Average low53°
Average precipitation0.03 in
Chance of precipitation13%
Record high92° (2007)
Record low36° (1974)
Thu, 0375° / 52°0.02
75 °
Cottonwood, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high75°
Average low52°
Average precipitation0.02 in
Chance of precipitation12%
Record high97° (2022)
Record low35° (1962)
Fri, 0474° / 52°0.03
74 °
Cottonwood, Friday, 4 September
Climate normal for this date — 60-year average.
Average high74°
Average low52°
Average precipitation0.03 in
Chance of precipitation18%
Record high90° (1998)
Record low34° (1965)
Sat, 0575° / 51°0.05
75 °
Cottonwood, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low51°
Average precipitation0.05 in
Chance of precipitation22%
Record high93° (2020)
Record low37° (1965)
Sun, 0673° / 51°0.06
73 °
Cottonwood, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high73°
Average low51°
Average precipitation0.06 in
Chance of precipitation27%
Record high91° (1988)
Record low34° (1965)
Mon, 0772° / 50°0.06
72 °
Cottonwood, Monday, 7 September
Climate normal for this date — 60-year average.
Average high72°
Average low50°
Average precipitation0.06 in
Chance of precipitation28%
Record high99° (2022)
Record low35° (1965)
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 Cottonwood, 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 Cottonwood, 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.