Monthly outlook for Bonner-West Riverside, MT: average high 83.8°, average low 51.1°. That is 1° above the climate normal for August. Precipitation is expected on 0 days (about 0.1 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 24 August (92.8°), the coolest 11 August (42.6°).
83.8°/51.1°
Average high / low
+1°
Above normal
0 / 3
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
81.1°
82.9°
-1°
19 August – 28 August
88.4°
80.3°
+4.5°
29 August – 7 September
at normal
77.6°
—
August records over 66 years
101.8°10 August 2018All-time high
36.1°28 August 1960All-time low
Climate normals and records are computed from the nearest reference point — Clinton (11 mi).
Mon, 1085° / 44°0
85 °
Bonner-West Riverside, Monday, 10 August
Clear. High 85°, low 44°.
Pressure29.88 inHg
Wind4.9 mph W
Humidity15%
Visibility6.2 mi
Dew point28°
Tue, 1187° / 43°0
87 °
Bonner-West Riverside, Tuesday, 11 August
Clear. High 87°, low 43°.
Pressure29.94 inHg
Wind4.2 mph W
Humidity16%
Visibility6.2 mi
Dew point29°
Wed, 1285° / 53°0
85 °
Bonner-West Riverside, Wednesday, 12 August
Overcast. High 85°, low 53°.
Pressure29.85 inHg
Wind0.4 mph N
Humidity21%
Visibility6.2 mi
Dew point35°
Thu, 1373° / 50°0.02
73 °
Bonner-West Riverside, Thursday, 13 August
Light rain. High 73°, low 50°.
Pressure29.91 inHg
Wind4.9 mph NE
Humidity62%
Visibility6.2 mi
Dew point50°
Fri, 1478° / 48°0.02
78 °
Bonner-West Riverside, Friday, 14 August
Light rain. High 78°, low 48°.
Pressure29.94 inHg
Wind5.4 mph NE
Humidity47%
Visibility—
Dew point46°
Sat, 1581° / 49°0
81 °
Bonner-West Riverside, Saturday, 15 August
Overcast. High 81°, low 49°.
Pressure29.97 inHg
Wind5 mph S
Humidity43%
Visibility—
Dew point44°
Sun, 1676° / 50°0.03
76 °
Bonner-West Riverside, Sunday, 16 August
Light rain. High 76°, low 50°.
Pressure29.94 inHg
Wind14.4 mph W
Humidity49%
Visibility—
Dew point45°
Mon, 1779° / 49°0
79 °
Bonner-West Riverside, Monday, 17 August
Overcast. High 79°, low 49°.
Pressure29.94 inHg
Wind12.4 mph W
Humidity21%
Visibility—
Dew point28°
Tue, 1882° / 49°0
82 °
Bonner-West Riverside, Tuesday, 18 August
Mostly clear. High 82°, low 49°.
Pressure29.94 inHg
Wind15 mph W
Humidity22%
Visibility—
Dew point32°
Wed, 1983° / 52°0
83 °
Bonner-West Riverside, Wednesday, 19 August
Overcast. High 83°, low 52°.
Pressure29.97 inHg
Wind10.2 mph NW
Humidity27%
Visibility—
Dew point37°
Thu, 2085° / 55°0
85 °
Bonner-West Riverside, Thursday, 20 August
Partly cloudy. High 85°, low 55°.
Pressure30.00 inHg
Wind12.9 mph W
Humidity29%
Visibility—
Dew point42°
Fri, 2189° / 57°0
89 °
Bonner-West Riverside, Friday, 21 August
Clear. High 89°, low 57°.
Pressure30.03 inHg
Wind13.1 mph W
Humidity29%
Visibility—
Dew point43°
Sat, 2290° / 58°0
90 °
Bonner-West Riverside, Saturday, 22 August
Mostly clear. High 90°, low 58°.
Pressure30.03 inHg
Wind5.8 mph NW
Humidity23%
Visibility—
Dew point39°
Sun, 2391° / 57°0
91 °
Bonner-West Riverside, Sunday, 23 August
Overcast. High 91°, low 57°.
Pressure30.00 inHg
Wind4.5 mph NW
Humidity20%
Visibility—
Dew point37°
Mon, 2493° / 57°0
93 °
Bonner-West Riverside, Monday, 24 August
Clear. High 93°, low 57°.
Pressure29.91 inHg
Wind10.9 mph W
Humidity19%
Visibility—
Dew point36°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 53°0.03
80 °
Bonner-West Riverside, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low53°
Average precipitation0.03 in
Chance of precipitation15%
Record high97° (1981)
Record low37° (1992)
Wed, 2681° / 53°0.02
81 °
Bonner-West Riverside, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low53°
Average precipitation0.02 in
Chance of precipitation15%
Record high96° (1981)
Record low41° (1989)
Thu, 2780° / 54°0.04
80 °
Bonner-West Riverside, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low54°
Average precipitation0.04 in
Chance of precipitation20%
Record high93° (2011)
Record low40° (1960)
Fri, 2880° / 54°0.04
80 °
Bonner-West Riverside, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low54°
Average precipitation0.04 in
Chance of precipitation15%
Record high94° (2012)
Record low36° (1960)
Sat, 2980° / 53°0.02
80 °
Bonner-West Riverside, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low53°
Average precipitation0.02 in
Chance of precipitation13%
Record high94° (2017)
Record low39° (1965)
Sun, 3079° / 53°0.04
79 °
Bonner-West Riverside, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low53°
Average precipitation0.04 in
Chance of precipitation18%
Record high94° (2016)
Record low38° (1965)
Mon, 3177° / 52°0.06
77 °
Bonner-West Riverside, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low52°
Average precipitation0.06 in
Chance of precipitation23%
Record high94° (2022)
Record low42° (2010)
Tue, 0178° / 51°0.04
78 °
Bonner-West Riverside, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low51°
Average precipitation0.04 in
Chance of precipitation18%
Record high93° (1967)
Record low40° (2006)
Wed, 0278° / 51°0.04
78 °
Bonner-West Riverside, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high78°
Average low51°
Average precipitation0.04 in
Chance of precipitation17%
Record high94° (2017)
Record low36° (2008)
Thu, 0378° / 51°0.02
78 °
Bonner-West Riverside, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low51°
Average precipitation0.02 in
Chance of precipitation13%
Record high100° (2022)
Record low40° (1962)
Fri, 0478° / 51°0.01
78 °
Bonner-West Riverside, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low51°
Average precipitation0.01 in
Chance of precipitation12%
Record high94° (1988)
Record low39° (1962)
Sat, 0577° / 51°0.04
77 °
Bonner-West Riverside, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high77°
Average low51°
Average precipitation0.04 in
Chance of precipitation22%
Record high94° (1967)
Record low40° (1965)
Sun, 0676° / 51°0.05
76 °
Bonner-West Riverside, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low51°
Average precipitation0.05 in
Chance of precipitation22%
Record high95° (2022)
Record low37° (2010)
Mon, 0776° / 50°0.04
76 °
Bonner-West Riverside, Monday, 7 September
Climate normal for this date — 60-year average.
Average high76°
Average low50°
Average precipitation0.04 in
Chance of precipitation20%
Record high94° (2022)
Record low33° (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 Bonner-West Riverside, 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 Bonner-West Riverside, 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.