Monthly outlook for Slab City, WI: average high 83.8°, average low 58.8°. That is 3.9° above the climate normal for August. Precipitation is expected on 4 days (about 0.4 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 20 August (103.2°), the coolest 14 August (49.9°).
83.8°/58.8°
Average high / low
+3.9°
Above normal
4 / 5
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
81.3°
77°
+2.4°
19 August – 28 August
87.9°
76.4°
+6.4°
29 August – 7 September
at normal
74.4°
—
August records over 66 years
97.3°16 August 1988All-time high
43.3°29 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Cecil (6 mi).
Mon, 1087° / 66°0
87 °
Slab City, Monday, 10 August
Overcast. High 87°, low 66°.
Pressure29.91 inHg
Wind6.2 mph W
Humidity47%
Visibility6.2 mi
Dew point60°
Tue, 1185° / 62°0.11
85 °
Slab City, Tuesday, 11 August
Rain. High 85°, low 62°.
Pressure29.85 inHg
Wind7.2 mph S
Humidity72%
Visibility6.2 mi
Dew point63°
Wed, 1285° / 61°0
85 °
Slab City, Wednesday, 12 August
Clear. High 85°, low 61°.
Pressure29.83 inHg
Wind8.7 mph NW
Humidity30%
Visibility6.2 mi
Dew point48°
Thu, 1378° / 51°0
78 °
Slab City, Thursday, 13 August
Overcast. High 78°, low 51°.
Pressure30.03 inHg
Wind9 mph E
Humidity31%
Visibility—
Dew point39°
Fri, 1479° / 50°0
79 °
Slab City, Friday, 14 August
Mostly clear. High 79°, low 50°.
Pressure30.21 inHg
Wind8.6 mph SE
Humidity29%
Visibility—
Dew point38°
Sat, 1581° / 51°0
81 °
Slab City, Saturday, 15 August
Overcast. High 81°, low 51°.
Pressure30.24 inHg
Wind9.3 mph SE
Humidity28%
Visibility—
Dew point39°
Sun, 1674° / 62°0.02
74 °
Slab City, Sunday, 16 August
Light rain. High 74°, low 62°.
Pressure30.09 inHg
Wind6.8 mph SW
Humidity84%
Visibility—
Dew point60°
Mon, 1782° / 56°0
82 °
Slab City, Monday, 17 August
Light rain. High 82°, low 56°.
Pressure30.09 inHg
Wind9.2 mph E
Humidity31%
Visibility—
Dew point45°
Tue, 1886° / 55°0
86 °
Slab City, Tuesday, 18 August
Overcast. High 86°, low 55°.
Pressure29.97 inHg
Wind11.4 mph S
Humidity30%
Visibility—
Dew point45°
Wed, 1993° / 65°0.06
93 °
Slab City, Wednesday, 19 August
Light rain. High 93°, low 65°.
Pressure29.85 inHg
Wind12.2 mph S
Humidity44%
Visibility—
Dew point62°
Thu, 20103° / 72°0.02
103 °
Slab City, Thursday, 20 August
Light rain. High 103°, low 72°.
Pressure29.74 inHg
Wind15.5 mph N
Humidity32%
Visibility—
Dew point61°
Fri, 2191° / 62°0
91 °
Slab City, Friday, 21 August
Partly cloudy. High 91°, low 62°.
Pressure29.94 inHg
Wind11.2 mph E
Humidity33%
Visibility—
Dew point51°
Sat, 2288° / 58°0
88 °
Slab City, Saturday, 22 August
Light rain. High 88°, low 58°.
Pressure29.88 inHg
Wind15 mph E
Humidity32%
Visibility—
Dew point49°
Sun, 2375° / 61°0.12
75 °
Slab City, Sunday, 23 August
Light rain. High 75°, low 61°.
Pressure29.97 inHg
Wind16.2 mph NE
Humidity83%
Visibility—
Dew point61°
Mon, 2478° / 56°0
78 °
Slab City, Monday, 24 August
Overcast. High 78°, low 56°.
Pressure30.09 inHg
Wind14 mph E
Humidity49%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2577° / 61°0.09
77 °
Slab City, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.09 in
Chance of precipitation33%
Record high91° (2013)
Record low47° (1977)
Wed, 2677° / 62°0.15
77 °
Slab City, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.15 in
Chance of precipitation42%
Record high90° (2020)
Record low47° (1964)
Thu, 2777° / 62°0.2
77 °
Slab City, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.2 in
Chance of precipitation42%
Record high93° (1976)
Record low44° (1968)
Fri, 2876° / 61°0.11
76 °
Slab City, Friday, 28 August
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.11 in
Chance of precipitation35%
Record high89° (1984)
Record low44° (1986)
Sat, 2976° / 60°0.09
76 °
Slab City, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.09 in
Chance of precipitation33%
Record high89° (2010)
Record low43° (1965)
Sun, 3075° / 59°0.1
75 °
Slab City, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.1 in
Chance of precipitation30%
Record high91° (2012)
Record low48° (1974)
Mon, 3175° / 58°0.07
75 °
Slab City, Monday, 31 August
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.07 in
Chance of precipitation23%
Record high89° (2000)
Record low46° (2009)
Tue, 0175° / 58°0.1
75 °
Slab City, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.1 in
Chance of precipitation23%
Record high87° (2008)
Record low44° (1994)
Wed, 0275° / 59°0.09
75 °
Slab City, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.09 in
Chance of precipitation33%
Record high90° (2008)
Record low42° (1974)
Thu, 0374° / 59°0.11
74 °
Slab City, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high74°
Average low59°
Average precipitation0.11 in
Chance of precipitation27%
Record high92° (2023)
Record low42° (1974)
Fri, 0474° / 58°0.05
74 °
Slab City, Friday, 4 September
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.05 in
Chance of precipitation22%
Record high91° (2023)
Record low41° (1974)
Sat, 0573° / 58°0.09
73 °
Slab City, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.09 in
Chance of precipitation25%
Record high88° (2007)
Record low44° (1962)
Sun, 0674° / 58°0.09
74 °
Slab City, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.09 in
Chance of precipitation33%
Record high88° (1960)
Record low42° (1962)
Mon, 0773° / 57°0.11
73 °
Slab City, Monday, 7 September
Climate normal for this date — 60-year average.
Average high73°
Average low57°
Average precipitation0.11 in
Chance of precipitation33%
Record high89° (1976)
Record low42° (1968)
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 Slab City, 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 Slab City, 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.