Monthly outlook for Trempealeau, WI: average high 80.2°, average low 60°. That is 1.2° above the climate normal for August. Precipitation is expected on 4 days (about 2.6 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 18 August (90.2°), the coolest 20 August (52.6°).
80.2°/60°
Average high / low
+1.2°
Above normal
4 / 5
Wet days / normal
2.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
81.6°
78.3°
+1.8°
19 August – 28 August
78°
77.9°
+0.1°
29 August – 7 September
at normal
76.2°
—
August records over 66 years
99.9°16 August 1988All-time high
45.1°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Ettrick (14 mi).
Mon, 1085° / 72°0.02
85 °
Trempealeau, Monday, 10 August
Light rain. High 85°, low 72°.
Pressure29.91 inHg
Wind6.1 mph SE
Humidity71%
Visibility6.2 mi
Dew point69°
Tue, 1186° / 64°1.3
86 °
Trempealeau, Tuesday, 11 August
Heavy rain. High 86°, low 64°.
Pressure29.80 inHg
Wind5.4 mph N
Humidity65%
Visibility6.2 mi
Dew point66°
Wed, 1283° / 64°0
83 °
Trempealeau, Wednesday, 12 August
Partly cloudy. High 83°, low 64°.
Pressure29.91 inHg
Wind10.5 mph N
Humidity45%
Visibility6.2 mi
Dew point56°
Thu, 1376° / 58°0
76 °
Trempealeau, Thursday, 13 August
Overcast. High 76°, low 58°.
Pressure30.03 inHg
Wind5.5 mph SW
Humidity68%
Visibility—
Dew point57°
Fri, 1480° / 57°0
80 °
Trempealeau, Friday, 14 August
Mostly clear. High 80°, low 57°.
Pressure30.12 inHg
Wind4.5 mph S
Humidity51%
Visibility—
Dew point56°
Sat, 1577° / 58°0.01
77 °
Trempealeau, Saturday, 15 August
Light rain. High 77°, low 58°.
Pressure30.24 inHg
Wind13.6 mph S
Humidity60%
Visibility—
Dew point60°
Sun, 1679° / 54°0
79 °
Trempealeau, Sunday, 16 August
Overcast. High 79°, low 54°.
Pressure30.12 inHg
Wind6.2 mph SW
Humidity57%
Visibility—
Dew point56°
Mon, 1785° / 62°0
85 °
Trempealeau, Monday, 17 August
Overcast. High 85°, low 62°.
Pressure30.03 inHg
Wind6.6 mph W
Humidity50%
Visibility—
Dew point60°
Tue, 1890° / 67°0.09
90 °
Trempealeau, Tuesday, 18 August
Light rain. High 90°, low 67°.
Pressure29.85 inHg
Wind16.8 mph W
Humidity53%
Visibility—
Dew point65°
Wed, 1979° / 60°0
79 °
Trempealeau, Wednesday, 19 August
Light rain. High 79°, low 60°.
Pressure30.00 inHg
Wind15.6 mph NW
Humidity48%
Visibility—
Dew point51°
Thu, 2074° / 53°0
74 °
Trempealeau, Thursday, 20 August
Overcast. High 74°, low 53°.
Pressure30.12 inHg
Wind7.8 mph SW
Humidity57%
Visibility—
Dew point50°
Fri, 2177° / 53°0
77 °
Trempealeau, Friday, 21 August
Clear. High 77°, low 53°.
Pressure30.06 inHg
Wind8.1 mph SE
Humidity44%
Visibility—
Dew point49°
Sat, 2278° / 56°0.37
78 °
Trempealeau, Saturday, 22 August
Rain. High 78°, low 56°.
Pressure29.80 inHg
Wind11.5 mph SW
Humidity93%
Visibility—
Dew point61°
Sun, 2380° / 62°0
80 °
Trempealeau, Sunday, 23 August
Clear. High 80°, low 62°.
Pressure29.91 inHg
Wind13.8 mph NW
Humidity48%
Visibility—
Dew point54°
Mon, 2480° / 57°0
80 °
Trempealeau, Monday, 24 August
Overcast. High 80°, low 57°.
Pressure29.97 inHg
Wind9.9 mph S
Humidity48%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2579° / 63°0.12
79 °
Trempealeau, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.12 in
Chance of precipitation25%
Record high91° (2013)
Record low51° (2025)
Wed, 2678° / 64°0.17
78 °
Trempealeau, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.17 in
Chance of precipitation40%
Record high92° (2024)
Record low49° (1964)
Thu, 2778° / 63°0.2
78 °
Trempealeau, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.2 in
Chance of precipitation35%
Record high92° (2013)
Record low50° (1968)
Fri, 2878° / 62°0.13
78 °
Trempealeau, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.13 in
Chance of precipitation37%
Record high93° (1984)
Record low45° (1986)
Sat, 2978° / 62°0.11
78 °
Trempealeau, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.11 in
Chance of precipitation27%
Record high90° (2012)
Record low48° (1965)
Sun, 3077° / 62°0.13
77 °
Trempealeau, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.13 in
Chance of precipitation28%
Record high95° (2012)
Record low51° (2009)
Mon, 3177° / 61°0.07
77 °
Trempealeau, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.07 in
Chance of precipitation22%
Record high90° (2000)
Record low47° (1967)
Tue, 0177° / 61°0.08
77 °
Trempealeau, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.08 in
Chance of precipitation25%
Record high93° (2011)
Record low46° (1974)
Wed, 0277° / 61°0.09
77 °
Trempealeau, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.09 in
Chance of precipitation32%
Record high91° (2023)
Record low48° (1974)
Thu, 0376° / 61°0.13
76 °
Trempealeau, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.13 in
Chance of precipitation30%
Record high95° (2023)
Record low43° (1974)
Fri, 0476° / 60°0.11
76 °
Trempealeau, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.11 in
Chance of precipitation30%
Record high94° (2023)
Record low43° (2025)
Sat, 0575° / 60°0.17
75 °
Trempealeau, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.17 in
Chance of precipitation33%
Record high90° (2023)
Record low45° (1962)
Sun, 0675° / 60°0.08
75 °
Trempealeau, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.08 in
Chance of precipitation27%
Record high90° (1960)
Record low46° (2025)
Mon, 0775° / 60°0.12
75 °
Trempealeau, Monday, 7 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.12 in
Chance of precipitation38%
Record high92° (1978)
Record low43° (2024)
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 Trempealeau, 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 Trempealeau, 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.