Monthly outlook for Marysville, WA: average high 75.4°, average low 54.5°. That is 0.8° above the climate normal for August. Precipitation is expected on 4 days (about 1.4 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 15 August (83.4°), the coolest 10 August (51.4°).
75.4°/54.5°
Average high / low
+0.8°
Above normal
4 / 3
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
77.4°
74.8°
+1.5°
19 August – 28 August
72.1°
72.7°
-0.4°
29 August – 7 September
at normal
70.7°
—
August records over 66 years
96.8°16 August 2020All-time high
44.2°18 August 1973All-time low
Mon, 1079° / 51°0
79 °
Marysville, Monday, 10 August
Partly cloudy. High 79°, low 51°.
Pressure30.09 inHg
Wind3.1 mph W
Humidity45%
Visibility6.2 mi
Dew point53°
Tue, 1176° / 52°0
76 °
Marysville, Tuesday, 11 August
Clear. High 76°, low 52°.
Pressure30.12 inHg
Wind6.3 mph NW
Humidity43%
Visibility6.2 mi
Dew point50°
Wed, 1277° / 52°0
77 °
Marysville, Wednesday, 12 August
Clear. High 77°, low 52°.
Pressure30.00 inHg
Wind5 mph W
Humidity47%
Visibility6.2 mi
Dew point53°
Thu, 1380° / 53°0
80 °
Marysville, Thursday, 13 August
Clear. High 80°, low 53°.
Pressure29.88 inHg
Wind7 mph NW
Humidity40%
Visibility—
Dew point51°
Fri, 1482° / 55°0
82 °
Marysville, Friday, 14 August
Overcast. High 82°, low 55°.
Pressure29.91 inHg
Wind5.5 mph NW
Humidity40%
Visibility—
Dew point53°
Sat, 1583° / 55°0.01
83 °
Marysville, Saturday, 15 August
Light rain. High 83°, low 55°.
Pressure29.97 inHg
Wind8 mph NW
Humidity37%
Visibility—
Dew point52°
Sun, 1681° / 54°0
81 °
Marysville, Sunday, 16 August
Overcast. High 81°, low 54°.
Pressure29.94 inHg
Wind5.9 mph NW
Humidity31%
Visibility—
Dew point45°
Mon, 1762° / 58°0.28
62 °
Marysville, Monday, 17 August
Light rain. High 62°, low 58°.
Pressure30.00 inHg
Wind9.9 mph SE
Humidity92%
Visibility—
Dew point59°
Tue, 1876° / 55°0.01
76 °
Marysville, Tuesday, 18 August
Light rain. High 76°, low 55°.
Pressure30.00 inHg
Wind7.4 mph NW
Humidity43%
Visibility—
Dew point50°
Wed, 1981° / 53°0
81 °
Marysville, Wednesday, 19 August
Partly cloudy. High 81°, low 53°.
Pressure29.94 inHg
Wind5.4 mph W
Humidity37%
Visibility—
Dew point49°
Thu, 2078° / 60°0.05
78 °
Marysville, Thursday, 20 August
Light rain. High 78°, low 60°.
Pressure29.91 inHg
Wind7.7 mph W
Humidity48%
Visibility—
Dew point55°
Fri, 2175° / 56°0.04
75 °
Marysville, Friday, 21 August
Light rain. High 75°, low 56°.
Pressure29.94 inHg
Wind4.3 mph S
Humidity45%
Visibility—
Dew point50°
Sat, 2268° / 53°0.35
68 °
Marysville, Saturday, 22 August
Rain. High 68°, low 53°.
Pressure30.03 inHg
Wind2.9 mph NW
Humidity76%
Visibility—
Dew point58°
Sun, 2371° / 55°0.04
71 °
Marysville, Sunday, 23 August
Light rain. High 71°, low 55°.
Pressure30.09 inHg
Wind6.1 mph NW
Humidity54%
Visibility—
Dew point52°
Mon, 2459° / 54°0.66
59 °
Marysville, Monday, 24 August
Rain. High 59°, low 54°.
Pressure29.88 inHg
Wind5.7 mph SE
Humidity96%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2573° / 55°0.07
73 °
Marysville, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.07 in
Chance of precipitation25%
Record high87° (1996)
Record low47° (1973)
Wed, 2673° / 55°0.06
73 °
Marysville, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.06 in
Chance of precipitation22%
Record high89° (1986)
Record low47° (1993)
Thu, 2773° / 56°0.13
73 °
Marysville, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.13 in
Chance of precipitation27%
Record high90° (1986)
Record low49° (1960)
Fri, 2873° / 55°0.06
73 °
Marysville, Friday, 28 August
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.06 in
Chance of precipitation27%
Record high91° (1967)
Record low46° (2000)
Sat, 2972° / 55°0.1
72 °
Marysville, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.1 in
Chance of precipitation37%
Record high90° (2017)
Record low45° (1969)
Sun, 3071° / 55°0.09
71 °
Marysville, 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 low45° (1965)
Mon, 3170° / 55°0.08
70 °
Marysville, Monday, 31 August
Climate normal for this date — 60-year average.
Average high70°
Average low55°
Average precipitation0.08 in
Chance of precipitation33%
Record high91° (1987)
Record low45° (1964)
Tue, 0171° / 54°0.16
71 °
Marysville, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.16 in
Chance of precipitation30%
Record high87° (1987)
Record low44° (1973)
Wed, 0271° / 54°0.09
71 °
Marysville, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.09 in
Chance of precipitation33%
Record high92° (1988)
Record low44° (1960)
Thu, 0371° / 54°0.09
71 °
Marysville, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.09 in
Chance of precipitation25%
Record high94° (1988)
Record low46° (1975)
Fri, 0471° / 54°0.06
71 °
Marysville, 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, 0570° / 54°0.1
70 °
Marysville, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high70°
Average low54°
Average precipitation0.1 in
Chance of precipitation23%
Record high96° (2017)
Record low47° (2000)
Sun, 0670° / 53°0.13
70 °
Marysville, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high70°
Average low53°
Average precipitation0.13 in
Chance of precipitation30%
Record high85° (1986)
Record low45° (1969)
Mon, 0770° / 53°0.07
70 °
Marysville, Monday, 7 September
Climate normal for this date — 60-year average.
Average high70°
Average low53°
Average precipitation0.07 in
Chance of precipitation30%
Record high87° (2020)
Record low43° (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 Marysville, 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 Marysville, 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.