Grafton, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 70°F 21°C	Observed at: Grafton, IL	Elevation: 606 ft | 185 m
	Last Updated: July 29, 5:30 AM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 70°F | 21°C
	Pressure: 29.41 in | 995.9 mb	Dewpoint: 58°F | 14°C
	Humidity: 66%	Wind: ENE 5 mph | ENE 8 kph
	Feels Like: 71°F | 22°C	Visibility: 53.8 mi | 86.6 km
	Lat/Long: 38.97 | -90.4314	Sunrise: 6:00 AM   Sunset: 8:16 PM

7 Day Graphical Forecast

Valid: 5:30 AM 7/29/2026

Tonight Clear 69 °F 1% Chance Precipitation Thursday Overcast 92 |67 °F 0% Chance Precipitation Friday Light Showers 84 |68 °F 67% Chance Precipitation Saturday Drizzle 78 |67 °F 67% Chance Precipitation Sunday Clear 82 |61 °F 17% Chance Precipitation Monday Clear 84 |64 °F 15% Chance Precipitation Tuesday Clear 86 |62 °F 7% Chance Precipitation

7 Hour Graphical Forecast

Valid: 5:30 AM 7/29/2026

5 AM Clear 71 °F 0% Chance Precipitation

6 AM Clear 69 °F 1% Chance Precipitation

7 AM Clear 70 °F 1% Chance Precipitation

8 AM Clear 73 °F 1% Chance Precipitation

9 AM Clear 76 °F 1% Chance Precipitation

10 AM Clear 80 °F 1% Chance Precipitation

11 AM Clear 83 °F 0% Chance Precipitation

7 Day Textual Forecast - with QPF, Max Wind, Humidity, Snowfall & UV Index

7 Day & Night Weather Forecast for Grafton, IL - (Fahrenheit & Celsius) Valid: 5:30 AM 7/29/2026 Tonight Clear with a low around 69°F [21°C]. NE wind to around 8 mph [13 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 92°F [33°C]. E wind to around 7 mph [11 kph], with gusts to near 14 mph [23 kph]. Dewpoint near 58°F [14°C] with humidity of 65%. Pressure around 29.41 in [995.9 mb]. UV Index: 7.5. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 67°F [20°C]. E wind to around 7 mph [11 kph], with gusts to near 14 mph [23 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Friday Light Showers with a high near 84°F [29°C]. SSE wind to around 17 mph [27 kph], with gusts to near 30 mph [49 kph]. Dewpoint near 58°F [14°C] with humidity of 94%. Pressure around 29.41 in [995.9 mb]. UV Index: 6.7. Chance of precipitation 67% with QPF of 0.32 in [8.1 mm]. Friday Night Light Showers with a low around 68°F [20°C]. SSE wind to around 17 mph [27 kph], with gusts to near 30 mph [49 kph]. Chance of precipitation 67% with QPF of 0.32 in [8.1 mm]. Saturday Drizzle with a high near 78°F [26°C]. NNE wind to around 18 mph [28 kph], with gusts to near 27 mph [43 kph]. Dewpoint near 58°F [14°C] with humidity of 98%. Pressure around 29.41 in [995.9 mb]. UV Index: 5.75. Chance of precipitation 67% with QPF of 0.08 in [2.1 mm]. Saturday Night Drizzle with a low around 67°F [19°C]. NNE wind to around 18 mph [28 kph], with gusts to near 27 mph [43 kph]. Chance of precipitation 67% with QPF of 0.08 in [2.1 mm]. Sunday Clear with a high near 82°F [28°C]. NE wind to around 12 mph [19 kph], with gusts to near 22 mph [36 kph]. Dewpoint near 58°F [14°C] with humidity of 96%. Pressure around 29.41 in [995.9 mb]. UV Index: 7.45. Chance of precipitation 17% with QPF of 0.00 in [0.0 mm]. Sunday Night Clear with a low around 61°F [16°C]. NE wind to around 12 mph [19 kph], with gusts to near 22 mph [36 kph]. Chance of precipitation 17% with QPF of 0.00 in [0.0 mm]. Monday Clear with a high near 84°F [29°C]. ENE wind to around 9 mph [14 kph], with gusts to near 12 mph [19 kph]. Dewpoint near 58°F [14°C] with humidity of 95%. Pressure around 29.41 in [995.9 mb]. UV Index: 7.45. Chance of precipitation 15% with QPF of 0.00 in [0.0 mm]. Monday Night Clear with a low around 64°F [18°C]. ENE wind to around 9 mph [14 kph], with gusts to near 12 mph [19 kph]. Chance of precipitation 15% with QPF of 0.00 in [0.0 mm]. Tuesday Clear with a high near 86°F [30°C]. E wind to around 12 mph [19 kph], with gusts to near 21 mph [34 kph]. Dewpoint near 58°F [14°C] with humidity of 93%. Pressure around 29.41 in [995.9 mb]. UV Index: 7.45. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm]. Tuesday Night Clear with a low around 62°F [17°C]. E wind to around 12 mph [19 kph], with gusts to near 21 mph [34 kph]. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Grafton, IL

Tonight: 0.0 mm | 0.00 in

Thursday: 0.0 mm | 0.00 in

Thursday Night: 0.0 mm | 0.00 in

Friday: 8.1 mm | 0.32 in

Friday Night: 8.1 mm | 0.32 in

Saturday: 2.1 mm | 0.08 in

Saturday Night: 2.1 mm | 0.08 in

Sunday: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

Monday: 0.0 mm | 0.00 in

Monday Night: 0.0 mm | 0.00 in

Tuesday: 0.0 mm | 0.00 in

Tuesday Night: 0.0 mm | 0.00 in

7 Day and Night - Maximum Wind Speed Forecast for Grafton, IL

Tonight: NE @ 13 kph | 8 mph

Thursday: E @ 11 kph | 7 mph

Thursday Night: E @ 11 kph | 7 mph

Friday: SSE @ 27 kph | 17 mph

Friday Night: SSE @ 27 kph | 17 mph

Saturday: NNE @ 28 kph | 18 mph

Saturday Night: NNE @ 28 kph | 18 mph

Sunday: NE @ 19 kph | 12 mph

Sunday Night: NE @ 19 kph | 12 mph

Monday: ENE @ 14 kph | 9 mph

Monday Night: ENE @ 14 kph | 9 mph

Tuesday: E @ 19 kph | 12 mph

Tuesday Night: E @ 19 kph | 12 mph

7 Day and Night - Maximum Humidity Forecast for Grafton, IL

Tonight: 83 %

Thursday: 65 %

Thursday Night: 65 %

Friday: 94 %

Friday Night: 94 %

Saturday: 98 %

Saturday Night: 98 %

Sunday: 96 %

Sunday Night: 96 %

Monday: 95 %

Monday Night: 95 %

Tuesday: 93 %

Tuesday Night: 93 %

7 Day and Night - Snowfall Totals Forecast for Grafton, IL

Tonight: 0.0 cm | 0.00 in

Thursday: 0.0 cm | 0.00 in

Thursday Night: 0.0 cm | 0.00 in

Friday: 0.0 cm | 0.00 in

Friday Night: 0.0 cm | 0.00 in

Saturday: 0.0 cm | 0.00 in

Saturday Night: 0.0 cm | 0.00 in

Sunday: 0.0 cm | 0.00 in

Sunday Night: 0.0 cm | 0.00 in

Monday: 0.0 cm | 0.00 in

Monday Night: 0.0 cm | 0.00 in

Tuesday: 0.0 cm | 0.00 in

Tuesday Night: 0.0 cm | 0.00 in

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