Monthly outlook for Boltonville, WI: average high 77.6°, average low 59.5°. That is 0.4° above the climate normal for August. Precipitation is expected on 5 days (about 1.3 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 10 August (83.7°), the coolest 23 August (51.5°).
77.6°/59.5°
Average high / low
+0.4°
Above normal
5 / 5
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
76.9°
77°
-0.1°
19 August – 28 August
78.8°
76.7°
+1.2°
29 August – 7 September
at normal
74.8°
—
August records over 66 years
97.5°23 August 2023All-time high
48.2°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Random Lake (8 mi).
Mon, 1084° / 70°0
84 °
Boltonville, Monday, 10 August
Light rain. High 84°, low 70°.
Pressure29.91 inHg
Wind5.7 mph W
Humidity67%
Visibility6.2 mi
Dew point69°
Tue, 1179° / 63°0.02
79 °
Boltonville, Tuesday, 11 August
Light rain. High 79°, low 63°.
Pressure29.91 inHg
Wind4.6 mph W
Humidity60%
Visibility6.2 mi
Dew point64°
Wed, 1283° / 63°0
83 °
Boltonville, Wednesday, 12 August
Clear. High 83°, low 63°.
Pressure29.85 inHg
Wind11 mph NW
Humidity58%
Visibility6.2 mi
Dew point64°
Thu, 1370° / 57°0
70 °
Boltonville, Thursday, 13 August
Overcast. High 70°, low 57°.
Pressure30.03 inHg
Wind9.4 mph E
Humidity71%
Visibility—
Dew point55°
Fri, 1473° / 56°0
73 °
Boltonville, Friday, 14 August
Overcast. High 73°, low 56°.
Pressure30.21 inHg
Wind11.3 mph E
Humidity48%
Visibility—
Dew point50°
Sat, 1572° / 60°0.04
72 °
Boltonville, Saturday, 15 August
Light rain. High 72°, low 60°.
Pressure30.24 inHg
Wind13.9 mph SE
Humidity59%
Visibility—
Dew point56°
Sun, 1672° / 63°0.13
72 °
Boltonville, Sunday, 16 August
Light rain. High 72°, low 63°.
Pressure30.00 inHg
Wind13.1 mph NW
Humidity76%
Visibility—
Dew point63°
Mon, 1779° / 60°0
79 °
Boltonville, Monday, 17 August
Partly cloudy. High 79°, low 60°.
Pressure30.09 inHg
Wind8.5 mph NW
Humidity48%
Visibility—
Dew point53°
Tue, 1877° / 59°0
77 °
Boltonville, Tuesday, 18 August
Overcast. High 77°, low 59°.
Pressure29.88 inHg
Wind13.2 mph SW
Humidity74%
Visibility—
Dew point58°
Wed, 1978° / 60°0.02
78 °
Boltonville, Wednesday, 19 August
Light rain. High 78°, low 60°.
Pressure29.83 inHg
Wind15.4 mph N
Humidity62%
Visibility—
Dew point57°
Thu, 2077° / 55°0
77 °
Boltonville, Thursday, 20 August
Overcast. High 77°, low 55°.
Pressure29.94 inHg
Wind9.9 mph SE
Humidity40%
Visibility—
Dew point47°
Fri, 2180° / 58°0.1
80 °
Boltonville, Friday, 21 August
Light rain. High 80°, low 58°.
Pressure29.77 inHg
Wind15.4 mph SW
Humidity54%
Visibility—
Dew point57°
Sat, 2278° / 59°0.14
78 °
Boltonville, Saturday, 22 August
Light rain. High 78°, low 59°.
Pressure29.77 inHg
Wind17 mph NW
Humidity49%
Visibility—
Dew point55°
Sun, 2377° / 51°0
77 °
Boltonville, Sunday, 23 August
Overcast. High 77°, low 51°.
Pressure30.12 inHg
Wind9.9 mph NW
Humidity44%
Visibility—
Dew point49°
Mon, 2482° / 57°0
82 °
Boltonville, Monday, 24 August
Clear. High 82°, low 57°.
Pressure30.15 inHg
Wind9.2 mph W
Humidity38%
Visibility—
Dew point50°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2577° / 64°0.1
77 °
Boltonville, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high77°
Average low64°
Average precipitation0.1 in
Chance of precipitation30%
Record high92° (2021)
Record low51° (2025)
Wed, 2677° / 65°0.14
77 °
Boltonville, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.14 in
Chance of precipitation37%
Record high93° (2020)
Record low49° (2025)
Thu, 2777° / 65°0.15
77 °
Boltonville, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.15 in
Chance of precipitation37%
Record high92° (2013)
Record low51° (2025)
Fri, 2877° / 64°0.13
77 °
Boltonville, Friday, 28 August
Climate normal for this date — 60-year average.
Average high77°
Average low64°
Average precipitation0.13 in
Chance of precipitation35%
Record high92° (2021)
Record low48° (1986)
Sat, 2976° / 64°0.11
76 °
Boltonville, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.11 in
Chance of precipitation33%
Record high88° (1984)
Record low49° (1965)
Sun, 3076° / 63°0.07
76 °
Boltonville, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high76°
Average low63°
Average precipitation0.07 in
Chance of precipitation33%
Record high88° (1969)
Record low51° (2023)
Mon, 3175° / 62°0.04
75 °
Boltonville, Monday, 31 August
Climate normal for this date — 60-year average.
Average high75°
Average low62°
Average precipitation0.04 in
Chance of precipitation22%
Record high87° (1960)
Record low50° (2009)
Tue, 0175° / 62°0.07
75 °
Boltonville, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low62°
Average precipitation0.07 in
Chance of precipitation32%
Record high85° (1990)
Record low50° (2020)
Wed, 0276° / 63°0.07
76 °
Boltonville, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high76°
Average low63°
Average precipitation0.07 in
Chance of precipitation23%
Record high89° (2011)
Record low50° (2017)
Thu, 0375° / 62°0.1
75 °
Boltonville, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high75°
Average low62°
Average precipitation0.1 in
Chance of precipitation25%
Record high93° (2023)
Record low47° (1974)
Fri, 0474° / 62°0.07
74 °
Boltonville, Friday, 4 September
Climate normal for this date — 60-year average.
Average high74°
Average low62°
Average precipitation0.07 in
Chance of precipitation23%
Record high91° (2023)
Record low44° (2025)
Sat, 0574° / 61°0.11
74 °
Boltonville, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.11 in
Chance of precipitation27%
Record high86° (2023)
Record low49° (1962)
Sun, 0674° / 62°0.09
74 °
Boltonville, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high74°
Average low62°
Average precipitation0.09 in
Chance of precipitation38%
Record high87° (1985)
Record low46° (2025)
Mon, 0774° / 61°0.09
74 °
Boltonville, Monday, 7 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.09 in
Chance of precipitation35%
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 Boltonville, 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 Boltonville, 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.