Markham, Illinois 7 Day & Night Forecast & Conditions

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Current Conditions

Maps Alerts Climate Index

N/A 0°F -18°C Wind Chill: 0°F	Observed at: Markham, IL	Elevation: 707 ft | 215 m
	Last Updated: July 28, 1:11 PM Timezone: GMT -5/-4
	Sky Conditions: N/A	Temperature: 0°F | -18°C
	Pressure: 0 in | 0 mb	Dewpoint: 0°F | -18°C
	Humidity: 0%	Wind: N 0 mph | N 0 kph
	Feels Like: 0°F | -18°C	Visibility: 0 mi | 0 km
	Lat/Long: 39.7458 | -90.3278	Sunrise: 5:56 AM   Sunset: 8:19 PM

7 Day Graphical Forecast

Valid: 1:11 PM 7/28/2026

Today Overcast 95 |79 °F 35 |26 °C 13% Chance Precipitation Tuesday Overcast 91 |76 °F 33 |25 °C 3% Chance Precipitation Wednesday Overcast 84 |67 °F 29 |19 °C 2% Chance Precipitation Thursday Overcast 85 |64 °F 29 |18 °C 2% Chance Precipitation Friday Showers 77 |63 °F 25 |17 °C 51% Chance Precipitation Saturday Thunderstorm 82 |63 °F 28 |17 °C 51% Chance Precipitation Sunday Light Drizzle 84 |66 °F 29 |19 °C 21% Chance Precipitation

7 Hour Graphical Forecast

Valid: 1:11 PM 7/28/2026

1 PM Overcast 90 °F 3% Chance Precipitation

2 PM Overcast 91 °F 2% Chance Precipitation

3 PM Overcast 91 °F 2% Chance Precipitation

4 PM Partly Cloudy 90 °F 3% Chance Precipitation

5 PM Overcast 91 °F 3% Chance Precipitation

6 PM Overcast 89 °F 3% Chance Precipitation

7 PM Overcast 87 °F 3% Chance Precipitation

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

7 Day & Night Weather Forecast for Markham, IL - (Fahrenheit & Celsius) Valid: 1:11 PM 7/28/2026 Today Overcast with a high near 95°F [35°C]. SSW wind to around 15 mph [24 kph], with gusts to near 23 mph [36 kph]. Dewpoint near 0°F [-18°C] with humidity of 91%. Pressure around 0.00 in [0 mb]. UV Index: 7.7. Chance of precipitation 13% with QPF of 0.00 in [0.0 mm]. Tonight Overcast with a low around 79°F [26°C]. SSW wind to around 15 mph [24 kph], with gusts to near 23 mph [36 kph]. Chance of precipitation 13% with QPF of 0.00 in [0.0 mm]. Tuesday Overcast with a high near 91°F [33°C]. N wind to around 11 mph [17 kph], with gusts to near 22 mph [35 kph]. Dewpoint near 0°F [-18°C] with humidity of 93%. Pressure around 0.00 in [0 mb]. UV Index: 7.55. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 76°F [25°C]. N wind to around 11 mph [17 kph], with gusts to near 22 mph [35 kph]. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Wednesday Overcast with a high near 84°F [29°C]. E wind to around 10 mph [15 kph], with gusts to near 21 mph [33 kph]. Dewpoint near 0°F [-18°C] with humidity of 85%. Pressure around 0.00 in [0 mb]. UV Index: 7.6. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Wednesday Night Overcast with a low around 67°F [19°C]. E wind to around 10 mph [15 kph], with gusts to near 21 mph [33 kph]. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 85°F [29°C]. SSE wind to around 11 mph [18 kph], with gusts to near 21 mph [34 kph]. Dewpoint near 0°F [-18°C] with humidity of 90%. Pressure around 0.00 in [0 mb]. UV Index: 7.4. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 64°F [18°C]. SSE wind to around 11 mph [18 kph], with gusts to near 21 mph [34 kph]. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Friday Showers with a high near 77°F [25°C]. ESE wind to around 17 mph [27 kph], with gusts to near 34 mph [55 kph]. Dewpoint near 0°F [-18°C] with humidity of 98%. Pressure around 0.00 in [0 mb]. UV Index: 0.4. Chance of precipitation 51% with QPF of 1.02 in [25.8 mm]. Friday Night Showers with a low around 63°F [17°C]. ESE wind to around 17 mph [27 kph], with gusts to near 34 mph [55 kph]. Chance of precipitation 51% with QPF of 1.02 in [25.8 mm]. Saturday Thunderstorm with a high near 82°F [28°C]. NNE wind to around 15 mph [24 kph], with gusts to near 25 mph [40 kph]. Dewpoint near 0°F [-18°C] with humidity of 99%. Pressure around 0.00 in [0 mb]. UV Index: 6.75. Chance of precipitation 51% with QPF of 0.22 in [5.6 mm]. Saturday Night Thunderstorm with a low around 63°F [17°C]. NNE wind to around 15 mph [24 kph], with gusts to near 25 mph [40 kph]. Chance of precipitation 51% with QPF of 0.22 in [5.6 mm]. Sunday Light Drizzle with a high near 84°F [29°C]. NNE wind to around 9 mph [14 kph], with gusts to near 29 mph [47 kph]. Dewpoint near 0°F [-18°C] with humidity of 97%. Pressure around 0.00 in [0 mb]. UV Index: 7.35. Chance of precipitation 21% with QPF of 0.02 in [0.4 mm]. Sunday Night Light Drizzle with a low around 66°F [19°C]. NNE wind to around 9 mph [14 kph], with gusts to near 29 mph [47 kph]. Chance of precipitation 21% with QPF of 0.02 in [0.4 mm].

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7 Day and Night - QPF Forecast for Markham, IL

Today: 0.0 mm | 0.00 in

Tonight: 0.0 mm | 0.00 in

Tuesday: 0.0 mm | 0.00 in

Tuesday Night: 0.0 mm | 0.00 in

Wednesday: 0.0 mm | 0.00 in

Wednesday Night: 0.0 mm | 0.00 in

Thursday: 0.0 mm | 0.00 in

Thursday Night: 0.0 mm | 0.00 in

Friday: 25.8 mm | 1.02 in

Friday Night: 25.8 mm | 1.02 in

Saturday: 5.6 mm | 0.22 in

Saturday Night: 5.6 mm | 0.22 in

Sunday: 0.4 mm | 0.02 in

Sunday Night: 0.4 mm | 0.02 in

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

Today: SSW @ 24 kph | 15 mph

Tonight: SSW @ 24 kph | 15 mph

Tuesday: N @ 17 kph | 11 mph

Tuesday Night: N @ 17 kph | 11 mph

Wednesday: E @ 15 kph | 10 mph

Wednesday Night: E @ 15 kph | 10 mph

Thursday: SSE @ 18 kph | 11 mph

Thursday Night: SSE @ 18 kph | 11 mph

Friday: ESE @ 27 kph | 17 mph

Friday Night: ESE @ 27 kph | 17 mph

Saturday: NNE @ 24 kph | 15 mph

Saturday Night: NNE @ 24 kph | 15 mph

Sunday: NNE @ 14 kph | 9 mph

Sunday Night: NNE @ 14 kph | 9 mph

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

Today: 91 %

Tonight: 91 %

Tuesday: 93 %

Tuesday Night: 93 %

Wednesday: 85 %

Wednesday Night: 85 %

Thursday: 90 %

Thursday Night: 90 %

Friday: 98 %

Friday Night: 98 %

Saturday: 99 %

Saturday Night: 99 %

Sunday: 97 %

Sunday Night: 97 %

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

Today: 0.0 cm | 0.00 in

Tonight: 0.0 cm | 0.00 in

Tuesday: 0.0 cm | 0.00 in

Tuesday Night: 0.0 cm | 0.00 in

Wednesday: 0.0 cm | 0.00 in

Wednesday Night: 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

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