As of 22:46 CDT

Weather in Grafton, WI

65°Current weather

Grafton, Saturday, 8 August, 22:46

Clear. Feels like 65°. High 81°, low 64°.

Pressure30.00 inHg
Wind6.8 mph W
Humidity87%
Visibility6.2 mi
Dew point60°

Monthly outlook for Grafton, WI: average high 75.7°, average low 61.4°. That is 0° below the climate normal for August. Precipitation is expected on 3 days (about 2.5 inches), against a normal of 6 days and 2.0 inches. The warmest day looks like 10 August (84.9°), the coolest 20 August (55.8°).

75.7°/61.4°
Average high / low
−0°
Below normal
3 / 6
Wet days / normal
2.5 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
8 August – 17 August77.4°76.1°+0.7°
18 August – 27 August73°75.4°-1.3°
28 August – 6 Septemberat normal74.1°

August records over 66 years

96.3°23 August 2023All-time high
50.9°26 August 2025All-time low
Sun, 0976° / 64°1.24Heavy rain
76 °Heavy rain

Grafton, Sunday, 9 August

Heavy rain. High 76°, low 64°.

Pressure29.97 inHg
Wind7.5 mph W
Humidity95%
Visibility2.7 mi
Dew point67°
Mon, 1085° / 68°0.02Light rain
85 °Light rain

Grafton, Monday, 10 August

Light rain. High 85°, low 68°.

Pressure29.94 inHg
Wind4.2 mph SE
Humidity70%
Visibility6.2 mi
Dew point68°
Tue, 1175° / 65°0.67Heavy rain
75 °Heavy rain

Grafton, Tuesday, 11 August

Heavy rain. High 75°, low 65°.

Pressure29.80 inHg
Wind7.2 mph E
Humidity89%
Visibility6.2 mi
Dew point69°
Wed, 1280° / 63°0Light rain
80 °Light rain

Grafton, Wednesday, 12 August

Light rain. High 80°, low 63°.

Pressure29.85 inHg
Wind7.2 mph NW
Humidity65%
Visibility6.2 mi
Dew point65°
Thu, 1372° / 60°0Overcast
72 °Overcast

Grafton, Thursday, 13 August

Overcast. High 72°, low 60°.

Pressure30.03 inHg
Wind9.3 mph SW
Humidity52%
Visibility
Dew point50°
Fri, 1477° / 58°0Clear
77 °Clear

Grafton, Friday, 14 August

Clear. High 77°, low 58°.

Pressure30.12 inHg
Wind7.3 mph W
Humidity44%
Visibility
Dew point50°
Sat, 1573° / 61°0Overcast
73 °Overcast

Grafton, Saturday, 15 August

Overcast. High 73°, low 61°.

Pressure30.27 inHg
Wind8.7 mph SE
Humidity56%
Visibility
Dew point55°
Sun, 1674° / 58°0Overcast
74 °Overcast

Grafton, Sunday, 16 August

Overcast. High 74°, low 58°.

Pressure30.15 inHg
Wind6.9 mph SE
Humidity58%
Visibility
Dew point56°
Mon, 1780° / 62°0Partly cloudy
80 °Partly cloudy

Grafton, Monday, 17 August

Partly cloudy. High 80°, low 62°.

Pressure30.03 inHg
Wind6.3 mph SW
Humidity56%
Visibility
Dew point60°
Tue, 1884° / 67°0.03Light rain
84 °Light rain

Grafton, Tuesday, 18 August

Light rain. High 84°, low 67°.

Pressure29.91 inHg
Wind14.5 mph SW
Humidity60%
Visibility
Dew point65°
Wed, 1972° / 62°0.01Light rain
72 °Light rain

Grafton, Wednesday, 19 August

Light rain. High 72°, low 62°.

Pressure29.88 inHg
Wind18.5 mph NW
Humidity55%
Visibility
Dew point55°
Thu, 2072° / 56°0Overcast
72 °Overcast

Grafton, Thursday, 20 August

Overcast. High 72°, low 56°.

Pressure30.06 inHg
Wind10.9 mph N
Humidity43%
Visibility
Dew point45°
Fri, 2171° / 56°0Clear
71 °Clear

Grafton, Friday, 21 August

Clear. High 71°, low 56°.

Pressure30.09 inHg
Wind8.6 mph E
Humidity49%
Visibility
Dew point49°
Sat, 2263° / 58°0.44Rain
63 °Rain

Grafton, Saturday, 22 August

Rain. High 63°, low 58°.

Pressure29.91 inHg
Wind12.3 mph SE
Humidity95%
Visibility
Dew point58°
Sun, 2377° / 61°0.02Light rain
77 °Light rain

Grafton, Sunday, 23 August

Light rain. High 77°, low 61°.

Pressure29.85 inHg
Wind15.7 mph W
Humidity54%
Visibility
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2475° / 66°0.13Climate normal
75 °Climate normal

Grafton, Monday, 24 August

Climate normal for this date — 60-year average.

Average high75°
Average low66°
Average precipitation0.13 in
Chance of precipitation30%
Record high93° (2020)
Record low57° (1966)
Tue, 2576° / 67°0.09Climate normal
76 °Climate normal

Grafton, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high76°
Average low67°
Average precipitation0.09 in
Chance of precipitation27%
Record high89° (2021)
Record low52° (2025)
Wed, 2676° / 67°0.15Climate normal
76 °Climate normal

Grafton, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high76°
Average low67°
Average precipitation0.15 in
Chance of precipitation35%
Record high92° (2020)
Record low51° (2025)
Thu, 2776° / 67°0.13Climate normal
76 °Climate normal

Grafton, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high76°
Average low67°
Average precipitation0.13 in
Chance of precipitation42%
Record high90° (2020)
Record low53° (2025)
Fri, 2876° / 66°0.11Climate normal
76 °Climate normal

Grafton, Friday, 28 August

Climate normal for this date — 60-year average.

Average high76°
Average low66°
Average precipitation0.11 in
Chance of precipitation37%
Record high90° (2021)
Record low51° (1986)
Sat, 2976° / 66°0.11Climate normal
76 °Climate normal

Grafton, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high76°
Average low66°
Average precipitation0.11 in
Chance of precipitation35%
Record high87° (2022)
Record low52° (2025)
Sun, 3074° / 66°0.07Climate normal
74 °Climate normal

Grafton, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high74°
Average low66°
Average precipitation0.07 in
Chance of precipitation35%
Record high84° (2013)
Record low52° (2023)
Mon, 3174° / 65°0.04Climate normal
74 °Climate normal

Grafton, Monday, 31 August

Climate normal for this date — 60-year average.

Average high74°
Average low65°
Average precipitation0.04 in
Chance of precipitation17%
Record high84° (2022)
Record low52° (2025)
Tue, 0174° / 65°0.07Climate normal
74 °Climate normal

Grafton, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high74°
Average low65°
Average precipitation0.07 in
Chance of precipitation28%
Record high84° (2022)
Record low55° (2017)
Wed, 0274° / 65°0.06Climate normal
74 °Climate normal

Grafton, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high74°
Average low65°
Average precipitation0.06 in
Chance of precipitation27%
Record high87° (2023)
Record low52° (2025)
Thu, 0374° / 65°0.09Climate normal
74 °Climate normal

Grafton, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high74°
Average low65°
Average precipitation0.09 in
Chance of precipitation23%
Record high93° (2023)
Record low52° (1974)
Fri, 0473° / 64°0.07Climate normal
73 °Climate normal

Grafton, Friday, 4 September

Climate normal for this date — 60-year average.

Average high73°
Average low64°
Average precipitation0.07 in
Chance of precipitation25%
Record high88° (2023)
Record low45° (2025)
Sat, 0573° / 64°0.09Climate normal
73 °Climate normal

Grafton, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high73°
Average low64°
Average precipitation0.09 in
Chance of precipitation25%
Record high85° (2023)
Record low49° (2019)
Sun, 0673° / 64°0.08Climate normal
73 °Climate normal

Grafton, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high73°
Average low64°
Average precipitation0.08 in
Chance of precipitation35%
Record high85° (1990)
Record low47° (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 Grafton, 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 Grafton, 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.