Monthly outlook for Possession, WA: average high 72.3°, average low 54.4°. That is 0.3° below the climate normal for August. Precipitation is expected on 1 day (about 0.0 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 8 August (80.9°), the coolest 10 August (51.4°).
72.3°/54.4°
Average high / low
−0.3°
Below normal
1 / 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
73.1°
73.5°
-0.3°
18 August – 27 August
71°
71.4°
-0.2°
28 August – 6 September
at normal
69.4°
—
August records over 66 years
92.1°16 August 2020All-time high
43.5°29 August 1980All-time low
Climate normals and records are computed from the nearest reference point — Mountlake Terrace (9 mi).
Sun, 0976° / 53°0
76 °
Possession, Sunday, 9 August
Overcast. High 76°, low 53°.
Pressure30.03 inHg
Wind1.2 mph N
Humidity48%
Visibility6.2 mi
Dew point51°
Mon, 1072° / 51°0
72 °
Possession, Monday, 10 August
Partly cloudy. High 72°, low 51°.
Pressure30.09 inHg
Wind1.6 mph NW
Humidity52%
Visibility6.2 mi
Dew point52°
Tue, 1172° / 52°0
72 °
Possession, Tuesday, 11 August
Clear. High 72°, low 52°.
Pressure30.09 inHg
Wind2.9 mph N
Humidity54%
Visibility6.2 mi
Dew point53°
Wed, 1264° / 57°0
64 °
Possession, Wednesday, 12 August
Light rain. High 64°, low 57°.
Pressure30.06 inHg
Wind2.5 mph SW
Humidity82%
Visibility6.2 mi
Dew point57°
Thu, 1370° / 55°0.04
70 °
Possession, Thursday, 13 August
Light rain. High 70°, low 55°.
Pressure30.00 inHg
Wind8.7 mph N
Humidity61%
Visibility—
Dew point53°
Fri, 1470° / 53°0
70 °
Possession, Friday, 14 August
Overcast. High 70°, low 53°.
Pressure30.00 inHg
Wind9 mph N
Humidity61%
Visibility—
Dew point53°
Sat, 1576° / 54°0
76 °
Possession, Saturday, 15 August
Overcast. High 76°, low 54°.
Pressure29.97 inHg
Wind6.9 mph N
Humidity50%
Visibility—
Dew point53°
Sun, 1674° / 55°0
74 °
Possession, Sunday, 16 August
Mostly clear. High 74°, low 55°.
Pressure30.03 inHg
Wind9.1 mph NW
Humidity49%
Visibility—
Dew point52°
Mon, 1776° / 54°0
76 °
Possession, Monday, 17 August
Overcast. High 76°, low 54°.
Pressure30.00 inHg
Wind10.4 mph N
Humidity42%
Visibility—
Dew point49°
Tue, 1877° / 55°0
77 °
Possession, Tuesday, 18 August
Overcast. High 77°, low 55°.
Pressure30.06 inHg
Wind9.1 mph NW
Humidity43%
Visibility—
Dew point50°
Wed, 1964° / 56°0
64 °
Possession, Wednesday, 19 August
Overcast. High 64°, low 56°.
Pressure30.06 inHg
Wind6.2 mph NW
Humidity77%
Visibility—
Dew point56°
Thu, 2072° / 55°0
72 °
Possession, Thursday, 20 August
Overcast. High 72°, low 55°.
Pressure30.03 inHg
Wind9.9 mph N
Humidity60%
Visibility—
Dew point55°
Fri, 2176° / 56°0
76 °
Possession, Friday, 21 August
Mostly clear. High 76°, low 56°.
Pressure30.03 inHg
Wind10.5 mph N
Humidity50%
Visibility—
Dew point54°
Sat, 2268° / 55°0
68 °
Possession, Saturday, 22 August
Overcast. High 68°, low 55°.
Pressure30.03 inHg
Wind10 mph N
Humidity69%
Visibility—
Dew point56°
Sun, 2371° / 53°0
71 °
Possession, Sunday, 23 August
Partly cloudy. High 71°, low 53°.
Pressure29.94 inHg
Wind8.4 mph N
Humidity59%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2471° / 54°0.07
71 °
Possession, Monday, 24 August
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.07 in
Chance of precipitation17%
Record high85° (2025)
Record low46° (1993)
Tue, 2571° / 54°0.07
71 °
Possession, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.07 in
Chance of precipitation20%
Record high85° (2025)
Record low46° (1973)
Wed, 2672° / 54°0.05
72 °
Possession, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high72°
Average low54°
Average precipitation0.05 in
Chance of precipitation18%
Record high84° (1986)
Record low45° (1993)
Thu, 2771° / 55°0.11
71 °
Possession, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.11 in
Chance of precipitation28%
Record high87° (1986)
Record low47° (1963)
Fri, 2871° / 54°0.05
71 °
Possession, Friday, 28 August
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.05 in
Chance of precipitation27%
Record high86° (1967)
Record low47° (2024)
Sat, 2971° / 55°0.11
71 °
Possession, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.11 in
Chance of precipitation32%
Record high84° (2017)
Record low44° (1980)
Sun, 3069° / 55°0.07
69 °
Possession, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high69°
Average low55°
Average precipitation0.07 in
Chance of precipitation38%
Record high82° (1967)
Record low46° (1964)
Mon, 3169° / 54°0.07
69 °
Possession, Monday, 31 August
Climate normal for this date — 60-year average.
Average high69°
Average low54°
Average precipitation0.07 in
Chance of precipitation28%
Record high87° (1987)
Record low45° (1964)
Tue, 0169° / 54°0.11
69 °
Possession, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high69°
Average low54°
Average precipitation0.11 in
Chance of precipitation30%
Record high84° (1987)
Record low44° (1973)
Wed, 0269° / 53°0.09
69 °
Possession, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high69°
Average low53°
Average precipitation0.09 in
Chance of precipitation30%
Record high87° (1988)
Record low43° (1960)
Thu, 0369° / 53°0.08
69 °
Possession, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high69°
Average low53°
Average precipitation0.08 in
Chance of precipitation27%
Record high88° (1988)
Record low46° (1999)
Fri, 0469° / 53°0.07
69 °
Possession, Friday, 4 September
Climate normal for this date — 60-year average.
Average high69°
Average low53°
Average precipitation0.07 in
Chance of precipitation25%
Record high83° (1988)
Record low45° (1965)
Sat, 0569° / 53°0.09
69 °
Possession, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high69°
Average low53°
Average precipitation0.09 in
Chance of precipitation32%
Record high92° (2017)
Record low46° (2005)
Sun, 0669° / 53°0.12
69 °
Possession, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high69°
Average low53°
Average precipitation0.12 in
Chance of precipitation30%
Record high85° (2017)
Record low44° (1969)
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 Possession, 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 Possession, 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.