Monthly outlook for Sunriver, OR: average high 87.4°, average low 53.7°. That is 3.8° above the climate normal for August. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 23 August (94°), the coolest 10 August (42.3°).
87.4°/53.7°
Average high / low
+3.8°
Above normal
1 / 2
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
86.3°
81.6°
+2.6°
18 August – 27 August
89.2°
78.3°
+6°
28 August – 6 September
at normal
77.2°
—
August records over 66 years
99.5°15 August 2023All-time high
34.9°29 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Bend (14 mi).
Sun, 0987° / 45°0
87 °
Sunriver, Sunday, 9 August
Clear. High 87°, low 45°.
Pressure29.91 inHg
Wind1.2 mph S
Humidity14%
Visibility6.2 mi
Dew point28°
Mon, 1087° / 42°0
87 °
Sunriver, Monday, 10 August
Clear. High 87°, low 42°.
Pressure29.94 inHg
Wind2.1 mph E
Humidity16%
Visibility6.2 mi
Dew point31°
Tue, 1188° / 54°0
88 °
Sunriver, Tuesday, 11 August
Clear. High 88°, low 54°.
Pressure29.97 inHg
Wind0.7 mph SE
Humidity14%
Visibility6.2 mi
Dew point29°
Wed, 1284° / 52°0
84 °
Sunriver, Wednesday, 12 August
Clear. High 84°, low 52°.
Pressure29.91 inHg
Wind0.9 mph SW
Humidity24%
Visibility6.2 mi
Dew point39°
Thu, 1385° / 50°0
85 °
Sunriver, Thursday, 13 August
Clear. High 85°, low 50°.
Pressure29.80 inHg
Wind5.2 mph NW
Humidity13%
Visibility—
Dew point26°
Fri, 1487° / 52°0
87 °
Sunriver, Friday, 14 August
Overcast. High 87°, low 52°.
Pressure29.85 inHg
Wind6.3 mph NW
Humidity19%
Visibility—
Dew point37°
Sat, 1582° / 55°0.12
82 °
Sunriver, Saturday, 15 August
Light rain. High 82°, low 55°.
Pressure29.91 inHg
Wind8.6 mph SW
Humidity23%
Visibility—
Dew point38°
Sun, 1687° / 56°0
87 °
Sunriver, Sunday, 16 August
Clear. High 87°, low 56°.
Pressure29.94 inHg
Wind9.6 mph NW
Humidity19%
Visibility—
Dew point37°
Mon, 1787° / 58°0
87 °
Sunriver, Monday, 17 August
Overcast. High 87°, low 58°.
Pressure29.94 inHg
Wind12.6 mph W
Humidity15%
Visibility—
Dew point31°
Tue, 1886° / 57°0
86 °
Sunriver, Tuesday, 18 August
Overcast. High 86°, low 57°.
Pressure29.97 inHg
Wind8.5 mph NW
Humidity17%
Visibility—
Dew point33°
Wed, 1985° / 57°0
85 °
Sunriver, Wednesday, 19 August
Overcast. High 85°, low 57°.
Pressure29.91 inHg
Wind7.6 mph W
Humidity18%
Visibility—
Dew point35°
Thu, 2088° / 55°0
88 °
Sunriver, Thursday, 20 August
Clear. High 88°, low 55°.
Pressure29.88 inHg
Wind8.1 mph W
Humidity19%
Visibility—
Dew point38°
Fri, 2188° / 55°0
88 °
Sunriver, Friday, 21 August
Overcast. High 88°, low 55°.
Pressure29.91 inHg
Wind5.9 mph NW
Humidity18%
Visibility—
Dew point37°
Sat, 2293° / 58°0
93 °
Sunriver, Saturday, 22 August
Clear. High 93°, low 58°.
Pressure29.85 inHg
Wind5.9 mph N
Humidity17%
Visibility—
Dew point38°
Sun, 2394° / 65°0.01
94 °
Sunriver, Sunday, 23 August
Light rain. High 94°, low 65°.
Pressure29.83 inHg
Wind9.1 mph SW
Humidity19%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2477° / 50°0.03
77 °
Sunriver, Monday, 24 August
Climate normal for this date — 60-year average.
Average high77°
Average low50°
Average precipitation0.03 in
Chance of precipitation17%
Record high95° (1996)
Record low38° (1975)
Tue, 2577° / 51°0.02
77 °
Sunriver, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high77°
Average low51°
Average precipitation0.02 in
Chance of precipitation13%
Record high94° (2010)
Record low38° (1993)
Wed, 2678° / 50°0.01
78 °
Sunriver, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high78°
Average low50°
Average precipitation0.01 in
Chance of precipitation10%
Record high89° (1971)
Record low38° (1963)
Thu, 2778° / 51°0.01
78 °
Sunriver, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low51°
Average precipitation0.01 in
Chance of precipitation13%
Record high92° (2017)
Record low37° (1960)
Fri, 2879° / 51°0.02
79 °
Sunriver, Friday, 28 August
Climate normal for this date — 60-year average.
Average high79°
Average low51°
Average precipitation0.02 in
Chance of precipitation10%
Record high94° (2017)
Record low37° (1960)
Sat, 2979° / 51°0.02
79 °
Sunriver, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high79°
Average low51°
Average precipitation0.02 in
Chance of precipitation12%
Record high93° (2017)
Record low35° (1965)
Sun, 3076° / 50°0.04
76 °
Sunriver, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high76°
Average low50°
Average precipitation0.04 in
Chance of precipitation17%
Record high95° (2022)
Record low39° (1966)
Mon, 3176° / 49°0.02
76 °
Sunriver, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low49°
Average precipitation0.02 in
Chance of precipitation13%
Record high93° (2024)
Record low37° (2008)
Tue, 0177° / 49°0.01
77 °
Sunriver, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low49°
Average precipitation0.01 in
Chance of precipitation10%
Record high96° (1998)
Record low36° (1999)
Wed, 0278° / 49°0.01
78 °
Sunriver, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high78°
Average low49°
Average precipitation0.01 in
Chance of precipitation7%
Record high102° (2022)
Record low36° (1975)
Thu, 0377° / 49°0.02
77 °
Sunriver, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high77°
Average low49°
Average precipitation0.02 in
Chance of precipitation10%
Record high98° (2017)
Record low35° (1980)
Fri, 0477° / 49°0.01
77 °
Sunriver, Friday, 4 September
Climate normal for this date — 60-year average.
Average high77°
Average low49°
Average precipitation0.01 in
Chance of precipitation12%
Record high98° (2020)
Record low37° (2000)
Sat, 0577° / 49°0.01
77 °
Sunriver, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high77°
Average low49°
Average precipitation0.01 in
Chance of precipitation7%
Record high93° (1988)
Record low35° (1969)
Sun, 0676° / 48°0.03
76 °
Sunriver, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low48°
Average precipitation0.03 in
Chance of precipitation15%
Record high94° (2024)
Record low35° (1961)
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 Sunriver, OR 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 Sunriver, OR 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.