Local weather forecast

Weather in Markham, IL

Updated 2026-08-11 11:00 local time · ZIP codes 60428

Light rain
Now77°F

Light rain

High / Low88° / 73°
Rain chance82%
Wind5 mph
Weather alerts

Active alerts

2
Flood Advisory issued August 11 at 6:02AM CDT until August 11 at 8:00AM CDT by NWS Chicago IL

* WHAT...Flooding caused by excessive rainfall continues. * WHERE...Northern Jasper County in northwestern Indiana... Lake IN County in northwestern Indiana... Northeastern Newton County in northwestern Indiana... Southern Porter County in northwestern Indiana... * WHEN...Until 800 AM CDT. * IMPACTS...Creeks and streams may rise out of their banks. * ADDITIONAL DETAILS... - At 600 AM CDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 2 inches of rain have fallen. - Flooding impacts will continue. This mornings thunderstorms will exit the advisory area by 7 AM, but additional rain is expected later today which may redevelop flooding issues. - Some locations that will experience flooding include... Merrillville, Schererville, Hobart, Crown Point, Highland, Munster, Cedar Lake, Lowell, DeMotte, Hebron, Wheatfield, Griffith, Dyer, St. John, Lynwood, Lakes of the Four Seasons, Winfield, Roselawn and Kouts. - http://www.weather.gov/safety/flood

Safety instructions

A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

Flood Advisory issued August 11 at 4:56AM CDT until August 11 at 8:00AM CDT by NWS Chicago IL

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Northern Jasper County in northwestern Indiana... Lake IN County in northwestern Indiana... Northeastern Newton County in northwestern Indiana... Southern Porter County in northwestern Indiana... * WHEN...Until 800 AM CDT. * IMPACTS...Creeks and streams may rise out of their banks. * ADDITIONAL DETAILS... - At 456 AM CDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 2 inches of rain have fallen. - Some locations that will experience flooding include... Merrillville, Schererville, Hobart, Crown Point, Highland, Munster, Cedar Lake, Lowell, DeMotte, Hebron, Wheatfield, Griffith, Dyer, St. John, Lynwood, Lakes of the Four Seasons, Winfield, Roselawn and Kouts. - http://www.weather.gov/safety/flood

Safety instructions

A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

Hourly

Next hours

NowLight rain77°9% rain
12 PMLight drizzle82°49% rain
1 PMHeavy rain at times74°88% rain
2 PMPatchy rain nearby79°46% rain
3 PMCloudy77°24% rain
4 PMPartly Cloudy78°19% rain
5 PMPartly Cloudy78°17% rain
6 PMSunny81°12% rain
7 PMSunny80°12% rain
8 PMClear77°17% rain
9 PMClear76°19% rain
10 PMClear76°17% rain
Forecast

3-day weather forecast

Today2026-08-11
Sunny
88° 73°Sunny
Rain 82%Gust 11 mph
Tomorrow2026-08-12
Mist
81° 67°Mist
Rain 84%Gust 10 mph
Thursday2026-08-13
Sunny
83° 66°Sunny
Rain 47%Gust 6 mph
Conditions

Weather details

Feels like81°F
Humidity89%
Pressure29.90 inHg
Visibility3 mi
Wind5 mph SSE
Wind gusts11 mph
Precipitation0.00 in
UV index0
Daylight

Sunrise, sunset and moon

Sunrise05:55 AM
Sunset07:56 PM
Moonrise03:54 AM
Moon phaseNew Moon
Practical guide

Weather insights for today

Take an umbrella

Rain chance reaches about 88% over the next 12 hours.

Light layers should work

It feels like 81°F with winds near 5 mph.

Best window: 11 AM

77°F, 9% rain chance and 5 mph wind.

Use extra caution while driving

Visibility is around 3 mi; gusts may reach 19 mph.

Running conditions are less comfortable

Current temperature is 77°F, wind 5 mph, rain chance up to 88%.

Low UV protection needs

UV index is 0.

Markham weather today

Light rain and 77°F in Markham, IL. Today's high is 88°F with a 82% rain chance. Winds are around 5 mph with gusts near 11 mph. Relative humidity is 89%, pressure is 29.90 inHg, and visibility is about 3 miles.

Tonight and tomorrow in Markham

Sunrise is at 05:55 AM and sunset is at 07:56 PM. Tomorrow's forecast calls for Mist with a high near 81°F and a low near 67°F. The maximum rain chance is 84%.

Nearby

Weather near Markham

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