Monthly outlook for Cedar Grove, WA: average high 81.9°, average low 56.3°. That is 3° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 17 August (88.4°), the coolest 10 August (52.3°).
81.9°/56.3°
Average high / low
+3°
Above normal
0 / 3
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
81°
77.3°
+2°
18 August – 27 August
83.4°
74.8°
+4.8°
28 August – 6 September
at normal
72.9°
—
August records over 66 years
98.1°9 August 1981All-time high
44.2°30 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Renton (7 mi).
Sun, 0977° / 53°0
77 °
Cedar Grove, Sunday, 9 August
Mostly clear. High 77°, low 53°.
Pressure30.03 inHg
Wind2.3 mph W
Humidity38%
Visibility6.2 mi
Dew point49°
Mon, 1083° / 52°0
83 °
Cedar Grove, Monday, 10 August
Mostly clear. High 83°, low 52°.
Pressure30.06 inHg
Wind2.9 mph W
Humidity42%
Visibility6.2 mi
Dew point51°
Tue, 1184° / 54°0
84 °
Cedar Grove, Tuesday, 11 August
Clear. High 84°, low 54°.
Pressure30.09 inHg
Wind2.9 mph NW
Humidity39%
Visibility6.2 mi
Dew point50°
Wed, 1270° / 58°0
70 °
Cedar Grove, Wednesday, 12 August
Overcast. High 70°, low 58°.
Pressure30.06 inHg
Wind4.1 mph SW
Humidity74%
Visibility6.2 mi
Dew point56°
Thu, 1377° / 57°0.01
77 °
Cedar Grove, Thursday, 13 August
Light rain. High 77°, low 57°.
Pressure30.00 inHg
Wind5.5 mph N
Humidity44%
Visibility—
Dew point50°
Fri, 1482° / 54°0
82 °
Cedar Grove, Friday, 14 August
Overcast. High 82°, low 54°.
Pressure29.94 inHg
Wind7.5 mph NW
Humidity35%
Visibility—
Dew point48°
Sat, 1578° / 57°0
78 °
Cedar Grove, Saturday, 15 August
Overcast. High 78°, low 57°.
Pressure30.00 inHg
Wind4.2 mph S
Humidity43%
Visibility—
Dew point51°
Sun, 1685° / 56°0
85 °
Cedar Grove, Sunday, 16 August
Overcast. High 85°, low 56°.
Pressure30.03 inHg
Wind4.3 mph N
Humidity27%
Visibility—
Dew point43°
Mon, 1788° / 58°0
88 °
Cedar Grove, Monday, 17 August
Overcast. High 88°, low 58°.
Pressure30.00 inHg
Wind4.9 mph N
Humidity24%
Visibility—
Dew point43°
Tue, 1885° / 57°0
85 °
Cedar Grove, Tuesday, 18 August
Overcast. High 85°, low 57°.
Pressure30.06 inHg
Wind4 mph SW
Humidity28%
Visibility—
Dew point45°
Wed, 1977° / 59°0
77 °
Cedar Grove, Wednesday, 19 August
Overcast. High 77°, low 59°.
Pressure30.03 inHg
Wind5 mph NW
Humidity40%
Visibility—
Dew point49°
Thu, 2084° / 57°0
84 °
Cedar Grove, Thursday, 20 August
Overcast. High 84°, low 57°.
Pressure30.00 inHg
Wind5.8 mph N
Humidity39%
Visibility—
Dew point52°
Fri, 2185° / 58°0
85 °
Cedar Grove, Friday, 21 August
Clear. High 85°, low 58°.
Pressure30.03 inHg
Wind6 mph N
Humidity34%
Visibility—
Dew point50°
Sat, 2283° / 56°0
83 °
Cedar Grove, Saturday, 22 August
Overcast. High 83°, low 56°.
Pressure30.00 inHg
Wind7.6 mph N
Humidity41%
Visibility—
Dew point52°
Sun, 2387° / 57°0
87 °
Cedar Grove, Sunday, 23 August
Clear. High 87°, low 57°.
Pressure29.88 inHg
Wind5.9 mph NW
Humidity33%
Visibility—
Dew point50°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2474° / 56°0.07
74 °
Cedar Grove, Monday, 24 August
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0.07 in
Chance of precipitation20%
Record high88° (1985)
Record low49° (2021)
Tue, 2575° / 55°0.07
75 °
Cedar Grove, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high75°
Average low55°
Average precipitation0.07 in
Chance of precipitation18%
Record high87° (2022)
Record low46° (1995)
Wed, 2675° / 55°0.05
75 °
Cedar Grove, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high75°
Average low55°
Average precipitation0.05 in
Chance of precipitation22%
Record high90° (1986)
Record low48° (1993)
Thu, 2775° / 56°0.09
75 °
Cedar Grove, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high75°
Average low56°
Average precipitation0.09 in
Chance of precipitation27%
Record high92° (1986)
Record low49° (1962)
Fri, 2875° / 56°0.04
75 °
Cedar Grove, Friday, 28 August
Climate normal for this date — 60-year average.
Average high75°
Average low56°
Average precipitation0.04 in
Chance of precipitation18%
Record high92° (1967)
Record low47° (2000)
Sat, 2974° / 56°0.11
74 °
Cedar Grove, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0.11 in
Chance of precipitation25%
Record high87° (1996)
Record low46° (1980)
Sun, 3073° / 56°0.07
73 °
Cedar Grove, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.07 in
Chance of precipitation33%
Record high87° (1967)
Record low44° (1965)
Mon, 3172° / 56°0.07
72 °
Cedar Grove, Monday, 31 August
Climate normal for this date — 60-year average.
Average high72°
Average low56°
Average precipitation0.07 in
Chance of precipitation32%
Record high92° (1987)
Record low47° (1964)
Tue, 0173° / 55°0.08
73 °
Cedar Grove, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.08 in
Chance of precipitation27%
Record high89° (1987)
Record low44° (1973)
Wed, 0273° / 55°0.08
73 °
Cedar Grove, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.08 in
Chance of precipitation30%
Record high95° (1988)
Record low45° (1960)
Thu, 0373° / 55°0.08
73 °
Cedar Grove, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.08 in
Chance of precipitation25%
Record high93° (1988)
Record low44° (1975)
Fri, 0473° / 55°0.06
73 °
Cedar Grove, Friday, 4 September
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.06 in
Chance of precipitation22%
Record high87° (2003)
Record low46° (1965)
Sat, 0572° / 55°0.08
72 °
Cedar Grove, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.08 in
Chance of precipitation32%
Record high92° (2017)
Record low46° (2000)
Sun, 0672° / 54°0.11
72 °
Cedar Grove, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high72°
Average low54°
Average precipitation0.11 in
Chance of precipitation28%
Record high88° (2017)
Record low45° (1960)
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 Cedar Grove, WA 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 Cedar Grove, WA 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.