Monthly outlook for South Hills, MT: average high 87.8°, average low 59.1°. That is 4.2° above the climate normal for August. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 5 days and 0.9 inches. The warmest day looks like 24 August (99.2°), the coolest 10 August (51.8°).
87.8°/59.1°
Average high / low
+4.2°
Above normal
3 / 5
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
83.1°
80.9°
+1.2°
19 August – 28 August
95.8°
78.9°
+9.4°
29 August – 7 September
at normal
76.2°
—
August records over 66 years
99.5°5 August 1961All-time high
31.5°24 August 1992All-time low
Climate normals and records are computed from the nearest reference point — Helena (3 mi).
Mon, 1089° / 52°0
89 °
South Hills, Monday, 10 August
Clear. High 89°, low 52°.
Pressure29.83 inHg
Wind6.8 mph N
Humidity15%
Visibility6.2 mi
Dew point31°
Tue, 1191° / 58°0
91 °
South Hills, Tuesday, 11 August
Clear. High 91°, low 58°.
Pressure29.91 inHg
Wind6.6 mph NE
Humidity14%
Visibility6.2 mi
Dew point29°
Wed, 1283° / 58°0.02
83 °
South Hills, Wednesday, 12 August
Light rain. High 83°, low 58°.
Pressure29.85 inHg
Wind9 mph N
Humidity28%
Visibility6.2 mi
Dew point41°
Thu, 1364° / 52°0.1
64 °
South Hills, Thursday, 13 August
Light rain. High 64°, low 52°.
Pressure29.94 inHg
Wind9.5 mph N
Humidity64%
Visibility—
Dew point49°
Fri, 1474° / 54°0.21
74 °
South Hills, Friday, 14 August
Light rain. High 74°, low 54°.
Pressure30.00 inHg
Wind9.6 mph SW
Humidity61%
Visibility—
Dew point50°
Sat, 1579° / 52°0.04
79 °
South Hills, Saturday, 15 August
Light rain. High 79°, low 52°.
Pressure30.03 inHg
Wind8.9 mph SE
Humidity36%
Visibility—
Dew point46°
Sun, 1689° / 57°0
89 °
South Hills, Sunday, 16 August
Mostly clear. High 89°, low 57°.
Pressure30.00 inHg
Wind5 mph S
Humidity28%
Visibility—
Dew point44°
Mon, 1786° / 66°0
86 °
South Hills, Monday, 17 August
Overcast. High 86°, low 66°.
Pressure29.91 inHg
Wind11.4 mph W
Humidity24%
Visibility—
Dew point41°
Tue, 1888° / 60°0
88 °
South Hills, Tuesday, 18 August
Clear. High 88°, low 60°.
Pressure30.00 inHg
Wind14.2 mph NW
Humidity21%
Visibility—
Dew point36°
Wed, 1991° / 59°0
91 °
South Hills, Wednesday, 19 August
Clear. High 91°, low 59°.
Pressure30.00 inHg
Wind15.2 mph NW
Humidity13%
Visibility—
Dew point26°
Thu, 2095° / 64°0
95 °
South Hills, Thursday, 20 August
Overcast. High 95°, low 64°.
Pressure29.91 inHg
Wind16.5 mph NW
Humidity15%
Visibility—
Dew point33°
Fri, 2194° / 64°0
94 °
South Hills, Friday, 21 August
Clear. High 94°, low 64°.
Pressure29.88 inHg
Wind13.7 mph NW
Humidity13%
Visibility—
Dew point29°
Sat, 2298° / 61°0
98 °
South Hills, Saturday, 22 August
Clear. High 98°, low 61°.
Pressure29.91 inHg
Wind15.7 mph NW
Humidity15%
Visibility—
Dew point32°
Sun, 2397° / 65°0
97 °
South Hills, Sunday, 23 August
Clear. High 97°, low 65°.
Pressure30.00 inHg
Wind12.5 mph NW
Humidity12%
Visibility—
Dew point30°
Mon, 2499° / 67°0
99 °
South Hills, Monday, 24 August
Clear. High 99°, low 67°.
Pressure29.97 inHg
Wind18.3 mph N
Humidity11%
Visibility—
Dew point28°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2578° / 52°0.03
78 °
South Hills, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low52°
Average precipitation0.03 in
Chance of precipitation20%
Record high93° (2008)
Record low36° (1992)
Wed, 2679° / 53°0.03
79 °
South Hills, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low53°
Average precipitation0.03 in
Chance of precipitation18%
Record high93° (2010)
Record low37° (1992)
Thu, 2779° / 53°0.04
79 °
South Hills, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high79°
Average low53°
Average precipitation0.04 in
Chance of precipitation23%
Record high91° (2011)
Record low39° (1976)
Fri, 2878° / 53°0.07
78 °
South Hills, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low53°
Average precipitation0.07 in
Chance of precipitation20%
Record high94° (2012)
Record low36° (1960)
Sat, 2979° / 53°0.04
79 °
South Hills, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high79°
Average low53°
Average precipitation0.04 in
Chance of precipitation23%
Record high92° (2005)
Record low38° (1965)
Sun, 3077° / 52°0.06
77 °
South Hills, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low52°
Average precipitation0.06 in
Chance of precipitation23%
Record high92° (2007)
Record low36° (1965)
Mon, 3176° / 51°0.06
76 °
South Hills, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low51°
Average precipitation0.06 in
Chance of precipitation18%
Record high93° (2016)
Record low38° (1965)
Tue, 0176° / 51°0.06
76 °
South Hills, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high76°
Average low51°
Average precipitation0.06 in
Chance of precipitation15%
Record high91° (1967)
Record low36° (2008)
Wed, 0277° / 50°0.04
77 °
South Hills, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low50°
Average precipitation0.04 in
Chance of precipitation22%
Record high93° (2017)
Record low33° (2008)
Thu, 0377° / 51°0.02
77 °
South Hills, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high77°
Average low51°
Average precipitation0.02 in
Chance of precipitation13%
Record high97° (2022)
Record low37° (1962)
Fri, 0476° / 51°0.05
76 °
South Hills, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low51°
Average precipitation0.05 in
Chance of precipitation20%
Record high92° (1998)
Record low36° (1965)
Sat, 0576° / 51°0.06
76 °
South Hills, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low51°
Average precipitation0.06 in
Chance of precipitation25%
Record high92° (2020)
Record low41° (2008)
Sun, 0675° / 50°0.05
75 °
South Hills, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high75°
Average low50°
Average precipitation0.05 in
Chance of precipitation27%
Record high91° (1988)
Record low37° (1965)
Mon, 0774° / 50°0.07
74 °
South Hills, Monday, 7 September
Climate normal for this date — 60-year average.
Average high74°
Average low50°
Average precipitation0.07 in
Chance of precipitation27%
Record high96° (2022)
Record low34° (1985)
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 South Hills, 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 South Hills, 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.