Monthly outlook for Weallup Lake, WA: average high 68.6°, average low 52.9°. That is 3° below the climate normal for August. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 10 August (76.3°), the coolest 10 August (49.9°).
68.6°/52.9°
Average high / low
−3°
Below normal
4 / 3
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
70.3°
74.8°
-2.5°
19 August – 28 August
65.6°
72.7°
-3.9°
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
Climate normals and records are computed from the nearest reference point — Marysville (8 mi).
Mon, 1076° / 50°0
76 °
Weallup Lake, Monday, 10 August
Partly cloudy. High 76°, low 50°.
Pressure30.09 inHg
Wind2.9 mph W
Humidity58%
Visibility6.2 mi
Dew point52°
Tue, 1168° / 51°0
68 °
Weallup Lake, Tuesday, 11 August
Clear. High 68°, low 51°.
Pressure30.12 inHg
Wind5 mph NW
Humidity57%
Visibility6.2 mi
Dew point50°
Wed, 1269° / 52°0
69 °
Weallup Lake, Wednesday, 12 August
Clear. High 69°, low 52°.
Pressure30.00 inHg
Wind4.9 mph W
Humidity62%
Visibility6.2 mi
Dew point53°
Thu, 1371° / 52°0
71 °
Weallup Lake, Thursday, 13 August
Clear. High 71°, low 52°.
Pressure29.88 inHg
Wind6.9 mph NW
Humidity54%
Visibility—
Dew point51°
Fri, 1471° / 54°0
71 °
Weallup Lake, Friday, 14 August
Overcast. High 71°, low 54°.
Pressure29.94 inHg
Wind6.2 mph NW
Humidity55%
Visibility—
Dew point53°
Sat, 1572° / 54°0
72 °
Weallup Lake, Saturday, 15 August
Overcast. High 72°, low 54°.
Pressure29.97 inHg
Wind10.6 mph NW
Humidity55%
Visibility—
Dew point53°
Sun, 1671° / 53°0
71 °
Weallup Lake, Sunday, 16 August
Overcast. High 71°, low 53°.
Pressure29.97 inHg
Wind8.8 mph NW
Humidity51%
Visibility—
Dew point49°
Mon, 1760° / 56°0.21
60 °
Weallup Lake, Monday, 17 August
Light rain. High 60°, low 56°.
Pressure30.00 inHg
Wind11.1 mph SE
Humidity93%
Visibility—
Dew point57°
Tue, 1868° / 53°0
68 °
Weallup Lake, Tuesday, 18 August
Overcast. High 68°, low 53°.
Pressure30.00 inHg
Wind7.7 mph NW
Humidity59%
Visibility—
Dew point51°
Wed, 1971° / 52°0
71 °
Weallup Lake, Wednesday, 19 August
Partly cloudy. High 71°, low 52°.
Pressure29.97 inHg
Wind4.8 mph W
Humidity53%
Visibility—
Dew point51°
Thu, 2069° / 57°0.02
69 °
Weallup Lake, Thursday, 20 August
Light rain. High 69°, low 57°.
Pressure29.94 inHg
Wind8.5 mph NW
Humidity63%
Visibility—
Dew point55°
Fri, 2168° / 54°0.02
68 °
Weallup Lake, Friday, 21 August
Light rain. High 68°, low 54°.
Pressure29.94 inHg
Wind4.6 mph SE
Humidity59%
Visibility—
Dew point52°
Sat, 2263° / 52°0.21
63 °
Weallup Lake, Saturday, 22 August
Light rain. High 63°, low 52°.
Pressure30.03 inHg
Wind5.5 mph W
Humidity76%
Visibility—
Dew point54°
Sun, 2366° / 53°0.07
66 °
Weallup Lake, Sunday, 23 August
Light rain. High 66°, low 53°.
Pressure30.09 inHg
Wind7.1 mph NW
Humidity64%
Visibility—
Dew point52°
Mon, 2456° / 53°0.6
56 °
Weallup Lake, Monday, 24 August
Rain. High 56°, low 53°.
Pressure29.88 inHg
Wind8.9 mph SE
Humidity95%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2573° / 55°0.07
73 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 °
Weallup Lake, 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 Weallup Lake, 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 Weallup Lake, 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.