Live Weather & Forecast
Weather in Markham
Illinois, United States · Real-time conditions & 3-day outlook
7°C
Feels like 5°C
45°F / Feels 41°F
Sunny
Markham, Illinois
🌞 Daytime
Updated: 2026-04-11 18:15
Humidity
61%
Wind
12.2 km/h NNW
Wind Gust
14.8 km/h
Pressure
1030 mb
Visibility
14 km
UV Index
0.7
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
0°C
Wind Degree
339°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
302.9 μg/m³
NO₂
25.3 μg/m³
O₃
59 μg/m³
SO₂
8.7 μg/m³
PM 2.5
10.6 μg/m³
PM 10
11 μg/m³
Today's Hourly Forecast
24-hour breakdown for Markham, Illinois
12 AM
2°
Clear
1 AM
1°
Clear
2 AM
1°
Clear
3 AM
1°
Clear
4 AM
1°
Clear
5 AM
0°
Clear
6 AM
0°
Clear
7 AM
1°
Sunny
8 AM
2°
Sunny
9 AM
3°
Sunny
10 AM
5°
Sunny
11 AM
6°
Sunny
12 PM
6°
Sunny
1 PM
7°
Partly Cloudy
2 PM
8°
Partly Cloudy
3 PM
8°
Partly Cloudy
4 PM
9°
Partly Cloudy
5 PM
9°
Partly Cloudy
6 PM
7°
Sunny
7 PM
7°
Sunny
8 PM
5°
Clear
9 PM
4°
Clear
10 PM
3°
Clear
11 PM
2°
Clear
3-Day Forecast
Daily overview for Markham, Illinois
Today
Sunny
9°
/
0°
🌧️ 0% chance of rain
💧 Avg. humidity: 74%
💨 Max wind: 18.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:41 AM
🌇 Sunset: 07:56 PM
🌙 Waning Crescent
🌑 Moon: 42% lit
Sun, Apr 12
Overcast
8°
/
0°
🌧️ 0% chance of rain
💧 Avg. humidity: 84%
💨 Max wind: 20.5 km/h
🌧️ Total precip: 0.01 mm
☀️ UV Index: 0.4
🌅 Sunrise: 06:39 AM
🌇 Sunset: 07:57 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Heavy rain
19°
/
13°
🌧️ 88% chance of rain
💧 Avg. humidity: 88%
💨 Max wind: 32.8 km/h
🌧️ Total precip: 25.92 mm
☀️ UV Index: 0.6
🌅 Sunrise: 06:37 AM
🌇 Sunset: 07:59 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Best Time to Visit Markham
Plan your trip to Markham, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
People also ask — answers optimized for search engines and voice queries.
What is the current weather in Markham?
Current conditions in Markham: Sunny, temperature 7°C, humidity 61%.
What is the best time to visit Markham?
The best time to visit Markham is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Markham?
Markham is located at approximately 43.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Markham?
The wettest period in Markham is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Markham?
For visits to Markham during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Markham in?
Markham is located in United States, in the state of Illinois.
What are the public holidays in Markham in 2026?
View the 2026 public holidays for Markham on our Holidays page.
What are the GPS coordinates used for the weather forecast in Markham?
The weather forecast for Markham uses coordinates 43.8564, -79.3377.