Monthly outlook for Brill, WI: average high 81.2°, average low 57.1°. That is 2.9° above the climate normal for August. Precipitation is expected on 6 days (about 1.2 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 18 August (92.1°), the coolest 21 August (52.8°).
81.2°/57.1°
Average high / low
+2.9°
Above normal
6 / 5
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
82.6°
76.5°
+3.4°
18 August – 27 August
78.9°
75.4°
+2°
28 August – 6 September
at normal
73.8°
—
August records over 66 years
95°16 August 1988All-time high
44.2°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Cameron (14 mi).
Sun, 0976° / 61°0.19
76 °
Brill, Sunday, 9 August
Rain. High 76°, low 61°.
Pressure29.85 inHg
Wind6.4 mph S
Humidity92%
Visibility6.2 mi
Dew point65°
Mon, 1087° / 61°0
87 °
Brill, Monday, 10 August
Overcast. High 87°, low 61°.
Pressure29.91 inHg
Wind3.6 mph NE
Humidity36%
Visibility6.2 mi
Dew point53°
Tue, 1187° / 61°0.1
87 °
Brill, Tuesday, 11 August
Rain. High 87°, low 61°.
Pressure29.80 inHg
Wind5.4 mph N
Humidity51%
Visibility6.2 mi
Dew point62°
Wed, 1280° / 58°0
80 °
Brill, Wednesday, 12 August
Mostly clear. High 80°, low 58°.
Pressure29.91 inHg
Wind12.1 mph NW
Humidity31%
Visibility6.2 mi
Dew point45°
Thu, 1379° / 53°0
79 °
Brill, Thursday, 13 August
Overcast. High 79°, low 53°.
Pressure30.00 inHg
Wind8.5 mph N
Humidity29%
Visibility—
Dew point39°
Fri, 1481° / 53°0
81 °
Brill, Friday, 14 August
Clear. High 81°, low 53°.
Pressure30.12 inHg
Wind7.6 mph NE
Humidity27%
Visibility—
Dew point40°
Sat, 1584° / 56°0
84 °
Brill, Saturday, 15 August
Overcast. High 84°, low 56°.
Pressure30.21 inHg
Wind12.4 mph SW
Humidity35%
Visibility—
Dew point47°
Sun, 1685° / 56°0
85 °
Brill, Sunday, 16 August
Overcast. High 85°, low 56°.
Pressure30.06 inHg
Wind8.6 mph SW
Humidity43%
Visibility—
Dew point52°
Mon, 1786° / 60°0.05
86 °
Brill, Monday, 17 August
Light rain. High 86°, low 60°.
Pressure30.00 inHg
Wind6.9 mph NE
Humidity25%
Visibility—
Dew point41°
Tue, 1892° / 65°0.16
92 °
Brill, Tuesday, 18 August
Rain. High 92°, low 65°.
Pressure29.80 inHg
Wind15.5 mph W
Humidity42%
Visibility—
Dew point59°
Wed, 1974° / 55°0.08
74 °
Brill, Wednesday, 19 August
Light rain. High 74°, low 55°.
Pressure30.00 inHg
Wind16.7 mph N
Humidity40%
Visibility—
Dew point45°
Thu, 2079° / 53°0
79 °
Brill, Thursday, 20 August
Overcast. High 79°, low 53°.
Pressure30.09 inHg
Wind7.1 mph E
Humidity31%
Visibility—
Dew point41°
Fri, 2181° / 53°0
81 °
Brill, Friday, 21 August
Clear. High 81°, low 53°.
Pressure30.03 inHg
Wind8.3 mph SE
Humidity28%
Visibility—
Dew point39°
Sat, 2271° / 56°0.58
71 °
Brill, Saturday, 22 August
Rain. High 71°, low 56°.
Pressure29.74 inHg
Wind15.9 mph SE
Humidity98%
Visibility—
Dew point57°
Sun, 2376° / 58°0
76 °
Brill, Sunday, 23 August
Overcast. High 76°, low 58°.
Pressure29.88 inHg
Wind14.7 mph NW
Humidity49%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2475° / 61°0.13
75 °
Brill, Monday, 24 August
Climate normal for this date — 60-year average.
Average high75°
Average low61°
Average precipitation0.13 in
Chance of precipitation33%
Record high89° (2003)
Record low47° (1987)
Tue, 2576° / 61°0.12
76 °
Brill, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.12 in
Chance of precipitation40%
Record high91° (2013)
Record low48° (2025)
Wed, 2676° / 62°0.2
76 °
Brill, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.2 in
Chance of precipitation47%
Record high90° (2013)
Record low46° (1964)
Thu, 2776° / 61°0.22
76 °
Brill, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.22 in
Chance of precipitation40%
Record high89° (1991)
Record low47° (1971)
Fri, 2875° / 60°0.09
75 °
Brill, Friday, 28 August
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.09 in
Chance of precipitation30%
Record high91° (1984)
Record low44° (1986)
Sat, 2975° / 60°0.1
75 °
Brill, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.1 in
Chance of precipitation33%
Record high89° (2012)
Record low46° (1965)
Sun, 3074° / 59°0.13
74 °
Brill, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high74°
Average low59°
Average precipitation0.13 in
Chance of precipitation32%
Record high91° (2012)
Record low49° (2009)
Mon, 3174° / 58°0.13
74 °
Brill, Monday, 31 August
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.13 in
Chance of precipitation35%
Record high87° (1960)
Record low46° (1967)
Tue, 0174° / 58°0.12
74 °
Brill, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.12 in
Chance of precipitation33%
Record high89° (2011)
Record low43° (1974)
Wed, 0274° / 59°0.15
74 °
Brill, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high74°
Average low59°
Average precipitation0.15 in
Chance of precipitation38%
Record high87° (2023)
Record low45° (1974)
Thu, 0373° / 59°0.17
73 °
Brill, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high73°
Average low59°
Average precipitation0.17 in
Chance of precipitation32%
Record high93° (2023)
Record low41° (1974)
Fri, 0474° / 58°0.13
74 °
Brill, Friday, 4 September
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.13 in
Chance of precipitation33%
Record high93° (2023)
Record low43° (1974)
Sat, 0573° / 58°0.16
73 °
Brill, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.16 in
Chance of precipitation33%
Record high88° (2023)
Record low43° (2025)
Sun, 0673° / 58°0.15
73 °
Brill, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.15 in
Chance of precipitation33%
Record high88° (1960)
Record low44° (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 Brill, 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 Brill, 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.