As of 07:46 CDT

Weather in Sugar Island, WI

66°Current weather

Sugar Island, Sunday, 9 August, 07:46

Overcast. Feels like 67°. High 81°, low 62°.

Pressure30.00 inHg
Wind6.2 mph SW
Humidity93%
Visibility6.2 mi
Dew point64°

Monthly outlook for Sugar Island, WI: average high 79°, average low 63.2°. That is 0.4° above the climate normal for August. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 20 August (91.7°), the coolest 14 August (56.4°).

79°/63.2°
Average high / low
+0.4°
Above normal
4 / 5
Wet days / normal
1.2 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
9 August – 18 August76.5°78.3°-1°
19 August – 28 August83°78.3°+2.6°
29 August – 7 Septemberat normal76.3°

August records over 66 years

96.6°23 August 2023All-time high
44.6°29 August 1965All-time low

Climate normals and records are computed from the nearest reference point — Reeseville (14 mi).

Mon, 1084° / 70°0.04Light rain
84 °Light rain

Sugar Island, Monday, 10 August

Light rain. High 84°, low 70°.

Pressure29.91 inHg
Wind2.7 mph NW
Humidity69%
Visibility6.2 mi
Dew point70°
Tue, 1177° / 64°0.19Rain
77 °Rain

Sugar Island, Tuesday, 11 August

Rain. High 77°, low 64°.

Pressure29.83 inHg
Wind8.1 mph NE
Humidity85%
Visibility6.2 mi
Dew point69°
Wed, 1282° / 63°0Clear
82 °Clear

Sugar Island, Wednesday, 12 August

Clear. High 82°, low 63°.

Pressure29.85 inHg
Wind8.1 mph NW
Humidity68%
Visibility6.2 mi
Dew point68°
Thu, 1370° / 58°0Overcast
70 °Overcast

Sugar Island, Thursday, 13 August

Overcast. High 70°, low 58°.

Pressure30.00 inHg
Wind9.8 mph E
Humidity71%
Visibility
Dew point58°
Fri, 1473° / 56°0Mostly clear
73 °Mostly clear

Sugar Island, Friday, 14 August

Mostly clear. High 73°, low 56°.

Pressure30.18 inHg
Wind11.9 mph E
Humidity51%
Visibility
Dew point52°
Sat, 1574° / 59°0Overcast
74 °Overcast

Sugar Island, Saturday, 15 August

Overcast. High 74°, low 59°.

Pressure30.21 inHg
Wind14.4 mph SE
Humidity61%
Visibility
Dew point57°
Sun, 1670° / 62°0.01Light rain
70 °Light rain

Sugar Island, Sunday, 16 August

Light rain. High 70°, low 62°.

Pressure30.09 inHg
Wind5.9 mph SE
Humidity86%
Visibility
Dew point60°
Mon, 1777° / 60°0.01Light rain
77 °Light rain

Sugar Island, Monday, 17 August

Light rain. High 77°, low 60°.

Pressure30.09 inHg
Wind7.6 mph E
Humidity62%
Visibility
Dew point61°
Tue, 1876° / 58°0Overcast
76 °Overcast

Sugar Island, Tuesday, 18 August

Overcast. High 76°, low 58°.

Pressure30.03 inHg
Wind7.5 mph S
Humidity65%
Visibility
Dew point58°
Wed, 1984° / 66°0.37Rain
84 °Rain

Sugar Island, Wednesday, 19 August

Rain. High 84°, low 66°.

Pressure29.88 inHg
Wind14.3 mph S
Humidity72%
Visibility
Dew point69°
Thu, 2092° / 73°0Overcast
92 °Overcast

Sugar Island, Thursday, 20 August

Overcast. High 92°, low 73°.

Pressure29.77 inHg
Wind8.2 mph N
Humidity64%
Visibility
Dew point74°
Fri, 2183° / 67°0.01Light rain
83 °Light rain

Sugar Island, Friday, 21 August

Light rain. High 83°, low 67°.

Pressure29.97 inHg
Wind8.7 mph N
Humidity57%
Visibility
Dew point63°
Sat, 2287° / 64°0.04Light rain
87 °Light rain

Sugar Island, Saturday, 22 August

Light rain. High 87°, low 64°.

Pressure29.88 inHg
Wind11.2 mph SE
Humidity69%
Visibility
Dew point66°
Sun, 2379° / 64°0.01Light rain
79 °Light rain

Sugar Island, Sunday, 23 August

Light rain. High 79°, low 64°.

Pressure29.85 inHg
Wind13.1 mph NE
Humidity71%
Visibility
Dew point67°
Mon, 2473° / 65°0Overcast
73 °Overcast

Sugar Island, Monday, 24 August

Overcast. High 73°, low 65°.

Pressure30.09 inHg
Wind10.6 mph E
Humidity82%
Visibility
Dew point65°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2579° / 63°0.11Climate normal
79 °Climate normal

Sugar Island, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high79°
Average low63°
Average precipitation0.11 in
Chance of precipitation27%
Record high89° (2024)
Record low49° (2017)
Wed, 2679° / 64°0.14Climate normal
79 °Climate normal

Sugar Island, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high79°
Average low64°
Average precipitation0.14 in
Chance of precipitation38%
Record high92° (2020)
Record low48° (1964)
Thu, 2779° / 64°0.11Climate normal
79 °Climate normal

Sugar Island, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high79°
Average low64°
Average precipitation0.11 in
Chance of precipitation38%
Record high93° (1976)
Record low49° (2025)
Fri, 2878° / 62°0.15Climate normal
78 °Climate normal

Sugar Island, Friday, 28 August

Climate normal for this date — 60-year average.

Average high78°
Average low62°
Average precipitation0.15 in
Chance of precipitation40%
Record high92° (1984)
Record low46° (1986)
Sat, 2978° / 62°0.11Climate normal
78 °Climate normal

Sugar Island, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high78°
Average low62°
Average precipitation0.11 in
Chance of precipitation30%
Record high91° (1984)
Record low45° (1965)
Sun, 3077° / 62°0.07Climate normal
77 °Climate normal

Sugar Island, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high77°
Average low62°
Average precipitation0.07 in
Chance of precipitation35%
Record high89° (2013)
Record low49° (1974)
Mon, 3177° / 60°0.04Climate normal
77 °Climate normal

Sugar Island, Monday, 31 August

Climate normal for this date — 60-year average.

Average high77°
Average low60°
Average precipitation0.04 in
Chance of precipitation17%
Record high89° (2000)
Record low47° (2009)
Tue, 0177° / 61°0.07Climate normal
77 °Climate normal

Sugar Island, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high77°
Average low61°
Average precipitation0.07 in
Chance of precipitation25%
Record high90° (2011)
Record low46° (1967)
Wed, 0277° / 61°0.07Climate normal
77 °Climate normal

Sugar Island, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high77°
Average low61°
Average precipitation0.07 in
Chance of precipitation25%
Record high91° (2008)
Record low46° (1974)
Thu, 0376° / 61°0.09Climate normal
76 °Climate normal

Sugar Island, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high76°
Average low61°
Average precipitation0.09 in
Chance of precipitation25%
Record high93° (2023)
Record low45° (1974)
Fri, 0476° / 60°0.08Climate normal
76 °Climate normal

Sugar Island, Friday, 4 September

Climate normal for this date — 60-year average.

Average high76°
Average low60°
Average precipitation0.08 in
Chance of precipitation28%
Record high92° (2023)
Record low43° (2025)
Sat, 0575° / 59°0.09Climate normal
75 °Climate normal

Sugar Island, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high75°
Average low59°
Average precipitation0.09 in
Chance of precipitation18%
Record high89° (2023)
Record low47° (1974)
Sun, 0676° / 60°0.08Climate normal
76 °Climate normal

Sugar Island, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high76°
Average low60°
Average precipitation0.08 in
Chance of precipitation32%
Record high89° (1990)
Record low45° (1988)
Mon, 0775° / 59°0.11Climate normal
75 °Climate normal

Sugar Island, Monday, 7 September

Climate normal for this date — 60-year average.

Average high75°
Average low59°
Average precipitation0.11 in
Chance of precipitation33%
Record high89° (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 Sugar Island, 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 Sugar Island, 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.