Monthly outlook for Mill Creek, WA: average high 77.5°, average low 52.7°. That is 1.8° above the climate normal for August. Precipitation is expected on 1 day (about 0.0 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 17 August (84.6°), the coolest 10 August (48.5°).
77.5°/52.7°
Average high / low
+1.8°
Above 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
77.5°
74.9°
+1.4°
18 August – 27 August
77.4°
72.9°
+2.5°
28 August – 6 September
at normal
71.1°
—
August records over 66 years
94.5°16 August 2020All-time high
44.2°18 August 1973All-time low
Climate normals and records are computed from the nearest reference point — Everett (6 mi).
Sun, 0976° / 51°0
76 °
Mill Creek, Sunday, 9 August
Partly cloudy. High 76°, low 51°.
Pressure30.03 inHg
Wind1.8 mph NW
Humidity37%
Visibility6.2 mi
Dew point50°
Mon, 1078° / 49°0
78 °
Mill Creek, Monday, 10 August
Partly cloudy. High 78°, low 49°.
Pressure30.06 inHg
Wind2.6 mph W
Humidity40%
Visibility6.2 mi
Dew point51°
Tue, 1179° / 50°0
79 °
Mill Creek, Tuesday, 11 August
Clear. High 79°, low 50°.
Pressure30.09 inHg
Wind3.3 mph NW
Humidity42%
Visibility6.2 mi
Dew point53°
Wed, 1266° / 56°0
66 °
Mill Creek, Wednesday, 12 August
Light rain. High 66°, low 56°.
Pressure30.06 inHg
Wind2.6 mph SW
Humidity75%
Visibility6.2 mi
Dew point58°
Thu, 1374° / 53°0.04
74 °
Mill Creek, Thursday, 13 August
Light rain. High 74°, low 53°.
Pressure30.00 inHg
Wind7 mph N
Humidity52%
Visibility—
Dew point51°
Fri, 1475° / 50°0
75 °
Mill Creek, Friday, 14 August
Overcast. High 75°, low 50°.
Pressure29.97 inHg
Wind8.6 mph NW
Humidity46%
Visibility—
Dew point50°
Sat, 1580° / 53°0
80 °
Mill Creek, Saturday, 15 August
Overcast. High 80°, low 53°.
Pressure29.97 inHg
Wind4.7 mph SE
Humidity43%
Visibility—
Dew point50°
Sun, 1682° / 53°0
82 °
Mill Creek, Sunday, 16 August
Clear. High 82°, low 53°.
Pressure30.03 inHg
Wind8.4 mph NW
Humidity30%
Visibility—
Dew point45°
Mon, 1785° / 51°0
85 °
Mill Creek, Monday, 17 August
Mostly clear. High 85°, low 51°.
Pressure30.00 inHg
Wind9.1 mph NW
Humidity27%
Visibility—
Dew point44°
Tue, 1884° / 53°0
84 °
Mill Creek, Tuesday, 18 August
Overcast. High 84°, low 53°.
Pressure30.03 inHg
Wind7 mph NW
Humidity27%
Visibility—
Dew point44°
Wed, 1968° / 55°0
68 °
Mill Creek, Wednesday, 19 August
Overcast. High 68°, low 55°.
Pressure30.06 inHg
Wind5.8 mph NW
Humidity63%
Visibility—
Dew point54°
Thu, 2078° / 53°0
78 °
Mill Creek, Thursday, 20 August
Overcast. High 78°, low 53°.
Pressure30.00 inHg
Wind9.5 mph NW
Humidity45%
Visibility—
Dew point53°
Fri, 2183° / 55°0
83 °
Mill Creek, Friday, 21 August
Mostly clear. High 83°, low 55°.
Pressure30.03 inHg
Wind10 mph NW
Humidity34%
Visibility—
Dew point49°
Sat, 2274° / 52°0
74 °
Mill Creek, Saturday, 22 August
Overcast. High 74°, low 52°.
Pressure30.03 inHg
Wind8.6 mph NW
Humidity53%
Visibility—
Dew point54°
Sun, 2378° / 52°0
78 °
Mill Creek, Sunday, 23 August
Mostly clear. High 78°, low 52°.
Pressure29.91 inHg
Wind7.9 mph NW
Humidity42%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2472° / 55°0.07
72 °
Mill Creek, Monday, 24 August
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.07 in
Chance of precipitation20%
Record high85° (1985)
Record low45° (1993)
Tue, 2573° / 55°0.08
73 °
Mill Creek, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.08 in
Chance of precipitation25%
Record high86° (1996)
Record low47° (1973)
Wed, 2673° / 55°0.06
73 °
Mill Creek, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.06 in
Chance of precipitation20%
Record high88° (1986)
Record low47° (1993)
Thu, 2773° / 56°0.13
73 °
Mill Creek, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.13 in
Chance of precipitation28%
Record high89° (1986)
Record low49° (1995)
Fri, 2873° / 55°0.06
73 °
Mill Creek, Friday, 28 August
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.06 in
Chance of precipitation25%
Record high90° (1967)
Record low46° (2000)
Sat, 2972° / 55°0.11
72 °
Mill Creek, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.11 in
Chance of precipitation38%
Record high88° (2017)
Record low45° (1969)
Sun, 3071° / 55°0.09
71 °
Mill Creek, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.09 in
Chance of precipitation37%
Record high85° (1987)
Record low46° (1965)
Mon, 3171° / 55°0.08
71 °
Mill Creek, Monday, 31 August
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.08 in
Chance of precipitation33%
Record high91° (1987)
Record low46° (1964)
Tue, 0171° / 54°0.16
71 °
Mill Creek, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.16 in
Chance of precipitation30%
Record high86° (1987)
Record low44° (1973)
Wed, 0271° / 54°0.09
71 °
Mill Creek, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.09 in
Chance of precipitation32%
Record high91° (1988)
Record low45° (1960)
Thu, 0371° / 54°0.09
71 °
Mill Creek, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.09 in
Chance of precipitation25%
Record high92° (1988)
Record low46° (1975)
Fri, 0471° / 54°0.06
71 °
Mill Creek, Friday, 4 September
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.06 in
Chance of precipitation32%
Record high85° (1988)
Record low45° (1965)
Sat, 0571° / 54°0.1
71 °
Mill Creek, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.1 in
Chance of precipitation25%
Record high96° (2017)
Record low46° (2002)
Sun, 0670° / 53°0.13
70 °
Mill Creek, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high70°
Average low53°
Average precipitation0.13 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 Mill Creek, 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 Mill Creek, 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.