Monthly outlook for Miles City, MT: average high 87.3°, average low 67.2°. That is 0.5° above the climate normal for August. Precipitation is expected on 6 days (about 1.1 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 11 August (95.4°), the coolest 10 August (59°).
87.3°/67.2°
Average high / low
+0.5°
Above normal
6 / 3
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
88.5°
86.7°
+1°
19 August – 28 August
85.3°
85.5°
-0.1°
29 August – 7 September
at normal
82.6°
—
August records over 66 years
106°7 August 1995All-time high
39.6°22 August 1966All-time low
Mon, 1090° / 59°0
90 °
Miles City, Monday, 10 August
Partly cloudy. High 90°, low 59°.
Pressure29.80 inHg
Wind13 mph NE
Humidity27%
Visibility6.2 mi
Dew point47°
Tue, 1195° / 65°0
95 °
Miles City, Tuesday, 11 August
Clear. High 95°, low 65°.
Pressure29.83 inHg
Wind7.1 mph E
Humidity32%
Visibility6.2 mi
Dew point54°
Wed, 1289° / 69°0.1
89 °
Miles City, Wednesday, 12 August
Light rain. High 89°, low 69°.
Pressure29.85 inHg
Wind18 mph NE
Humidity37%
Visibility6.2 mi
Dew point54°
Thu, 1386° / 69°0.08
86 °
Miles City, Thursday, 13 August
Light rain. High 86°, low 69°.
Pressure29.83 inHg
Wind25.8 mph SE
Humidity45%
Visibility—
Dew point57°
Fri, 1469° / 65°0.43
69 °
Miles City, Friday, 14 August
Rain. High 69°, low 65°.
Pressure29.91 inHg
Wind16.6 mph SE
Humidity89%
Visibility—
Dew point62°
Sat, 1582° / 62°0
82 °
Miles City, Saturday, 15 August
Partly cloudy. High 82°, low 62°.
Pressure30.09 inHg
Wind8.3 mph NW
Humidity44%
Visibility—
Dew point51°
Sun, 1693° / 69°0.26
93 °
Miles City, Sunday, 16 August
Rain. High 93°, low 69°.
Pressure29.97 inHg
Wind20.7 mph E
Humidity35%
Visibility—
Dew point54°
Mon, 1793° / 69°0.02
93 °
Miles City, Monday, 17 August
Light rain. High 93°, low 69°.
Pressure29.83 inHg
Wind17.7 mph W
Humidity33%
Visibility—
Dew point53°
Tue, 1892° / 73°0
92 °
Miles City, Tuesday, 18 August
Overcast. High 92°, low 73°.
Pressure29.80 inHg
Wind14.7 mph SE
Humidity27%
Visibility—
Dew point47°
Wed, 1986° / 72°0
86 °
Miles City, Wednesday, 19 August
Partly cloudy. High 86°, low 72°.
Pressure29.91 inHg
Wind13.4 mph N
Humidity23%
Visibility—
Dew point40°
Thu, 2091° / 68°0
91 °
Miles City, Thursday, 20 August
Light rain. High 91°, low 68°.
Pressure29.91 inHg
Wind11.2 mph E
Humidity31%
Visibility—
Dew point48°
Fri, 2195° / 75°0.01
95 °
Miles City, Friday, 21 August
Light rain. High 95°, low 75°.
Pressure29.71 inHg
Wind16.6 mph NW
Humidity30%
Visibility—
Dew point53°
Sat, 2286° / 70°0.07
86 °
Miles City, Saturday, 22 August
Light rain. High 86°, low 70°.
Pressure29.80 inHg
Wind6.8 mph N
Humidity47%
Visibility—
Dew point57°
Sun, 2381° / 67°0.03
81 °
Miles City, Sunday, 23 August
Light rain. High 81°, low 67°.
Pressure29.88 inHg
Wind11.1 mph N
Humidity48%
Visibility—
Dew point55°
Mon, 2473° / 59°0.08
73 °
Miles City, Monday, 24 August
Light rain. High 73°, low 59°.
Pressure30.00 inHg
Wind15 mph N
Humidity61%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2584° / 61°0.02
84 °
Miles City, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high84°
Average low61°
Average precipitation0.02 in
Chance of precipitation12%
Record high103° (1969)
Record low43° (1992)
Wed, 2685° / 61°0.05
85 °
Miles City, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low61°
Average precipitation0.05 in
Chance of precipitation15%
Record high99° (2010)
Record low44° (1992)
Thu, 2785° / 62°0.02
85 °
Miles City, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low62°
Average precipitation0.02 in
Chance of precipitation7%
Record high98° (1967)
Record low47° (1987)
Fri, 2885° / 61°0.02
85 °
Miles City, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low61°
Average precipitation0.02 in
Chance of precipitation13%
Record high100° (1971)
Record low47° (1977)
Sat, 2985° / 61°0.01
85 °
Miles City, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high85°
Average low61°
Average precipitation0.01 in
Chance of precipitation12%
Record high100° (1966)
Record low49° (2018)
Sun, 3085° / 61°0.05
85 °
Miles City, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high85°
Average low61°
Average precipitation0.05 in
Chance of precipitation13%
Record high98° (1985)
Record low44° (1992)
Mon, 3183° / 60°0.01
83 °
Miles City, Monday, 31 August
Climate normal for this date — 60-year average.
Average high83°
Average low60°
Average precipitation0.01 in
Chance of precipitation12%
Record high99° (1991)
Record low44° (1994)
Tue, 0183° / 59°0.04
83 °
Miles City, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high83°
Average low59°
Average precipitation0.04 in
Chance of precipitation17%
Record high102° (1983)
Record low48° (1980)
Wed, 0283° / 60°0.04
83 °
Miles City, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high83°
Average low60°
Average precipitation0.04 in
Chance of precipitation12%
Record high101° (2015)
Record low41° (1974)
Thu, 0382° / 59°0.05
82 °
Miles City, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low59°
Average precipitation0.05 in
Chance of precipitation15%
Record high100° (2005)
Record low44° (1962)
Fri, 0482° / 58°0.03
82 °
Miles City, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low58°
Average precipitation0.03 in
Chance of precipitation15%
Record high102° (1998)
Record low40° (1962)
Sat, 0582° / 58°0.04
82 °
Miles City, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low58°
Average precipitation0.04 in
Chance of precipitation20%
Record high98° (1978)
Record low42° (1965)
Sun, 0681° / 57°0.04
81 °
Miles City, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high81°
Average low57°
Average precipitation0.04 in
Chance of precipitation20%
Record high100° (1976)
Record low40° (2025)
Mon, 0780° / 56°0.04
80 °
Miles City, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low56°
Average precipitation0.04 in
Chance of precipitation20%
Record high105° (2022)
Record low42° (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 Miles City, 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 Miles City, 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.