Monthly outlook for Sand Lake, WI: average high 84.4°, average low 60.5°. That is 4.3° above the climate normal for August. Precipitation is expected on 7 days (about 1.5 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 19 August (98.3°), the coolest 14 August (53.3°).
84.4°/60.5°
Average high / low
+4.3°
Above normal
7 / 5
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
84°
76.9°
+3.9°
19 August – 28 August
85.1°
76.2°
+4.9°
29 August – 7 September
at normal
74.4°
—
August records over 66 years
96.3°16 August 1988All-time high
43°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — St. Croix Falls (4 mi).
Mon, 1088° / 60°0.02
88 °
Sand Lake, Monday, 10 August
Light rain. High 88°, low 60°.
Pressure29.88 inHg
Wind6.5 mph E
Humidity30%
Visibility6.2 mi
Dew point50°
Tue, 1192° / 66°0.17
92 °
Sand Lake, Tuesday, 11 August
Rain. High 92°, low 66°.
Pressure29.77 inHg
Wind6.8 mph NW
Humidity43%
Visibility6.2 mi
Dew point62°
Wed, 1283° / 58°0
83 °
Sand Lake, Wednesday, 12 August
Mostly clear. High 83°, low 58°.
Pressure29.91 inHg
Wind8.9 mph N
Humidity27%
Visibility6.2 mi
Dew point44°
Thu, 1378° / 55°0
78 °
Sand Lake, Thursday, 13 August
Overcast. High 78°, low 55°.
Pressure30.06 inHg
Wind8 mph E
Humidity27%
Visibility—
Dew point36°
Fri, 1482° / 53°0
82 °
Sand Lake, Friday, 14 August
Overcast. High 82°, low 53°.
Pressure30.15 inHg
Wind7.9 mph SE
Humidity27%
Visibility—
Dew point39°
Sat, 1574° / 56°0
74 °
Sand Lake, Saturday, 15 August
Overcast. High 74°, low 56°.
Pressure30.21 inHg
Wind13.8 mph S
Humidity35%
Visibility—
Dew point42°
Sun, 1687° / 60°0
87 °
Sand Lake, Sunday, 16 August
Partly cloudy. High 87°, low 60°.
Pressure30.03 inHg
Wind14.7 mph NW
Humidity34%
Visibility—
Dew point50°
Mon, 1784° / 55°0
84 °
Sand Lake, Monday, 17 August
Overcast. High 84°, low 55°.
Pressure30.09 inHg
Wind8.3 mph SE
Humidity27%
Visibility—
Dew point40°
Tue, 1888° / 62°0.15
88 °
Sand Lake, Tuesday, 18 August
Light rain. High 88°, low 62°.
Pressure29.85 inHg
Wind15.6 mph S
Humidity56%
Visibility—
Dew point62°
Wed, 1998° / 69°0.42
98 °
Sand Lake, Wednesday, 19 August
Rain. High 98°, low 69°.
Pressure29.80 inHg
Wind10.3 mph S
Humidity47%
Visibility—
Dew point66°
Thu, 2090° / 68°0.3
90 °
Sand Lake, Thursday, 20 August
Rain. High 90°, low 68°.
Pressure29.83 inHg
Wind23.6 mph N
Humidity30%
Visibility—
Dew point51°
Fri, 2184° / 59°0
84 °
Sand Lake, Friday, 21 August
Overcast. High 84°, low 59°.
Pressure29.97 inHg
Wind12.4 mph N
Humidity34%
Visibility—
Dew point50°
Sat, 2286° / 62°0.11
86 °
Sand Lake, Saturday, 22 August
Light rain. High 86°, low 62°.
Pressure29.83 inHg
Wind12.9 mph NE
Humidity61%
Visibility—
Dew point63°
Sun, 2377° / 62°0.03
77 °
Sand Lake, Sunday, 23 August
Light rain. High 77°, low 62°.
Pressure29.94 inHg
Wind13.2 mph NE
Humidity63%
Visibility—
Dew point59°
Mon, 2474° / 60°0.05
74 °
Sand Lake, Monday, 24 August
Light rain. High 74°, low 60°.
Pressure30.09 inHg
Wind9.9 mph E
Humidity76%
Visibility—
Dew point62°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2577° / 62°0.11
77 °
Sand Lake, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.11 in
Chance of precipitation45%
Record high91° (2013)
Record low49° (2025)
Wed, 2676° / 62°0.24
76 °
Sand Lake, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.24 in
Chance of precipitation47%
Record high91° (2013)
Record low47° (1964)
Thu, 2776° / 61°0.2
76 °
Sand Lake, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.2 in
Chance of precipitation35%
Record high90° (1991)
Record low46° (1971)
Fri, 2876° / 61°0.09
76 °
Sand Lake, Friday, 28 August
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.09 in
Chance of precipitation35%
Record high90° (1984)
Record low43° (1986)
Sat, 2976° / 60°0.1
76 °
Sand Lake, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.1 in
Chance of precipitation22%
Record high89° (2013)
Record low47° (1965)
Sun, 3075° / 60°0.1
75 °
Sand Lake, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.1 in
Chance of precipitation30%
Record high92° (2012)
Record low47° (2009)
Mon, 3175° / 59°0.11
75 °
Sand Lake, Monday, 31 August
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.11 in
Chance of precipitation38%
Record high87° (1960)
Record low46° (1967)
Tue, 0175° / 59°0.12
75 °
Sand Lake, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.12 in
Chance of precipitation25%
Record high90° (2011)
Record low43° (1974)
Wed, 0275° / 60°0.11
75 °
Sand Lake, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.11 in
Chance of precipitation33%
Record high90° (2023)
Record low45° (1974)
Thu, 0374° / 60°0.15
74 °
Sand Lake, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high74°
Average low60°
Average precipitation0.15 in
Chance of precipitation33%
Record high95° (2023)
Record low38° (1974)
Fri, 0474° / 58°0.15
74 °
Sand Lake, Friday, 4 September
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.15 in
Chance of precipitation28%
Record high94° (2023)
Record low43° (1974)
Sat, 0574° / 58°0.13
74 °
Sand Lake, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.13 in
Chance of precipitation33%
Record high89° (2023)
Record low42° (1962)
Sun, 0673° / 58°0.1
73 °
Sand Lake, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.1 in
Chance of precipitation32%
Record high89° (1960)
Record low43° (2025)
Mon, 0773° / 58°0.08
73 °
Sand Lake, Monday, 7 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.08 in
Chance of precipitation37%
Record high91° (1976)
Record low42° (2025)
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 Sand Lake, WI 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 Sand Lake, WI 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.