Monthly outlook for Missoula, MT: average high 82.9°, average low 54.9°. That is 4.2° above the climate normal for August. Precipitation is expected on 5 days (about 1.4 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 11 August (92.2°), the coolest 23 August (50.3°).
82.9°/54.9°
Average high / low
+4.2°
Above normal
5 / 4
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
85.2°
76.2°
+5°
19 August – 28 August
79°
73.5°
+3.1°
29 August – 7 September
at normal
70.8°
—
August records over 66 years
96.4°10 August 2018All-time high
32.5°25 August 1992All-time low
Climate normals and records are computed from the nearest reference point — Evaro (14 mi).
Mon, 1090° / 51°0
90 °
Missoula, Monday, 10 August
Clear. High 90°, low 51°.
Pressure29.85 inHg
Wind2.9 mph NW
Humidity15%
Visibility6.2 mi
Dew point30°
Tue, 1192° / 55°0
92 °
Missoula, Tuesday, 11 August
Clear. High 92°, low 55°.
Pressure29.94 inHg
Wind2.7 mph W
Humidity17%
Visibility6.2 mi
Dew point32°
Wed, 1290° / 56°0
90 °
Missoula, Wednesday, 12 August
Overcast. High 90°, low 56°.
Pressure29.85 inHg
Wind1.3 mph W
Humidity20%
Visibility6.2 mi
Dew point36°
Thu, 1390° / 56°0.02
90 °
Missoula, Thursday, 13 August
Light rain. High 90°, low 56°.
Pressure29.77 inHg
Wind9.8 mph NW
Humidity30%
Visibility—
Dew point46°
Fri, 1485° / 60°0.01
85 °
Missoula, Friday, 14 August
Light rain. High 85°, low 60°.
Pressure29.91 inHg
Wind6.8 mph N
Humidity42%
Visibility—
Dew point53°
Sat, 1583° / 55°0.02
83 °
Missoula, Saturday, 15 August
Light rain. High 83°, low 55°.
Pressure30.03 inHg
Wind10.1 mph S
Humidity32%
Visibility—
Dew point47°
Sun, 1672° / 59°0.04
72 °
Missoula, Sunday, 16 August
Light rain. High 72°, low 59°.
Pressure30.06 inHg
Wind4.2 mph NW
Humidity80%
Visibility—
Dew point57°
Mon, 1784° / 58°0.04
84 °
Missoula, Monday, 17 August
Light rain. High 84°, low 58°.
Pressure29.91 inHg
Wind5 mph NW
Humidity40%
Visibility—
Dew point51°
Tue, 1875° / 53°0.01
75 °
Missoula, Tuesday, 18 August
Light rain. High 75°, low 53°.
Pressure29.94 inHg
Wind11 mph W
Humidity48%
Visibility—
Dew point48°
Wed, 1976° / 55°0.07
76 °
Missoula, Wednesday, 19 August
Light rain. High 76°, low 55°.
Pressure29.97 inHg
Wind6.6 mph SW
Humidity37%
Visibility—
Dew point45°
Thu, 2086° / 53°0.01
86 °
Missoula, Thursday, 20 August
Light rain. High 86°, low 53°.
Pressure29.91 inHg
Wind5.6 mph S
Humidity32%
Visibility—
Dew point46°
Fri, 2185° / 57°0.19
85 °
Missoula, Friday, 21 August
Light rain. High 85°, low 57°.
Pressure29.83 inHg
Wind5.4 mph NW
Humidity46%
Visibility—
Dew point53°
Sat, 2271° / 56°1.02
71 °
Missoula, Saturday, 22 August
Rain. High 71°, low 56°.
Pressure29.88 inHg
Wind3.6 mph SW
Humidity77%
Visibility—
Dew point56°
Sun, 2372° / 50°0.01
72 °
Missoula, Sunday, 23 August
Light rain. High 72°, low 50°.
Pressure30.00 inHg
Wind7.2 mph W
Humidity47%
Visibility—
Dew point45°
Mon, 2484° / 53°0
84 °
Missoula, Monday, 24 August
Overcast. High 84°, low 53°.
Pressure29.85 inHg
Wind4.9 mph S
Humidity35%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2573° / 49°0.05
73 °
Missoula, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high73°
Average low49°
Average precipitation0.05 in
Chance of precipitation13%
Record high91° (1981)
Record low33° (1992)
Wed, 2674° / 49°0.02
74 °
Missoula, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high74°
Average low49°
Average precipitation0.02 in
Chance of precipitation15%
Record high90° (1981)
Record low37° (1989)
Thu, 2773° / 50°0.06
73 °
Missoula, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high73°
Average low50°
Average precipitation0.06 in
Chance of precipitation27%
Record high87° (1996)
Record low35° (1960)
Fri, 2873° / 50°0.03
73 °
Missoula, Friday, 28 August
Climate normal for this date — 60-year average.
Average high73°
Average low50°
Average precipitation0.03 in
Chance of precipitation18%
Record high87° (2012)
Record low35° (1960)
Sat, 2973° / 49°0.02
73 °
Missoula, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high73°
Average low49°
Average precipitation0.02 in
Chance of precipitation17%
Record high87° (1998)
Record low35° (1965)
Sun, 3072° / 49°0.07
72 °
Missoula, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high72°
Average low49°
Average precipitation0.07 in
Chance of precipitation25%
Record high87° (1996)
Record low33° (1965)
Mon, 3170° / 48°0.09
70 °
Missoula, Monday, 31 August
Climate normal for this date — 60-year average.
Average high70°
Average low48°
Average precipitation0.09 in
Chance of precipitation27%
Record high87° (1991)
Record low36° (1977)
Tue, 0171° / 47°0.04
71 °
Missoula, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high71°
Average low47°
Average precipitation0.04 in
Chance of precipitation20%
Record high89° (1967)
Record low35° (2006)
Wed, 0271° / 48°0.05
71 °
Missoula, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high71°
Average low48°
Average precipitation0.05 in
Chance of precipitation20%
Record high87° (2017)
Record low32° (2008)
Thu, 0371° / 48°0.03
71 °
Missoula, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high71°
Average low48°
Average precipitation0.03 in
Chance of precipitation17%
Record high91° (2022)
Record low35° (1961)
Fri, 0471° / 48°0.03
71 °
Missoula, Friday, 4 September
Climate normal for this date — 60-year average.
Average high71°
Average low48°
Average precipitation0.03 in
Chance of precipitation20%
Record high88° (1988)
Record low34° (1964)
Sat, 0571° / 48°0.07
71 °
Missoula, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high71°
Average low48°
Average precipitation0.07 in
Chance of precipitation27%
Record high89° (1967)
Record low32° (1965)
Sun, 0669° / 48°0.06
69 °
Missoula, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high69°
Average low48°
Average precipitation0.06 in
Chance of precipitation30%
Record high85° (2022)
Record low33° (2010)
Mon, 0769° / 47°0.05
69 °
Missoula, Monday, 7 September
Climate normal for this date — 60-year average.
Average high69°
Average low47°
Average precipitation0.05 in
Chance of precipitation23%
Record high87° (2017)
Record low31° (1992)
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 Missoula, 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 Missoula, 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.