Live Weather & Forecast
Weather in Hamilton
Illinois, United States · Real-time conditions & 3-day outlook
6°C
Feels like 5°C
43°F / Feels 40°F
Clear
Hamilton, Illinois
🌙 Nighttime
Updated: 2026-04-11 22:30
Humidity
56%
Wind
7.9 km/h SE
Wind Gust
14.3 km/h
Pressure
1030 mb
Visibility
10 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
-3.1°C
Wind Degree
140°
Air Quality Index
US EPA: Good
UK DEFRA: Low (2)
CO
224.9 μg/m³
NO₂
22.8 μg/m³
O₃
50 μg/m³
SO₂
5.1 μg/m³
PM 2.5
12.4 μg/m³
PM 10
13.3 μg/m³
Today's Hourly Forecast
24-hour breakdown for Hamilton, Illinois
12 AM
5°
Overcast
1 AM
4°
Partly Cloudy
2 AM
4°
Clear
3 AM
3°
Clear
4 AM
2°
Clear
5 AM
2°
Clear
6 AM
1°
Clear
7 AM
2°
Sunny
8 AM
3°
Sunny
9 AM
4°
Sunny
10 AM
6°
Sunny
11 AM
7°
Partly Cloudy
12 PM
8°
Partly Cloudy
1 PM
9°
Partly Cloudy
2 PM
10°
Sunny
3 PM
11°
Sunny
4 PM
11°
Sunny
5 PM
11°
Sunny
6 PM
11°
Sunny
7 PM
10°
Sunny
8 PM
9°
Cloudy
9 PM
7°
Clear
10 PM
6°
Clear
11 PM
5°
Clear
3-Day Forecast
Daily overview for Hamilton, Illinois
Today
Sunny
12°
/
1°
🌧️ 0% chance of rain
💧 Avg. humidity: 66%
💨 Max wind: 13.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:44 AM
🌇 Sunset: 07:58 PM
🌙 Waning Crescent
🌑 Moon: 42% lit
Sun, Apr 12
Overcast
18°
/
2°
🌧️ 0% chance of rain
💧 Avg. humidity: 80%
💨 Max wind: 25.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 0.3
🌅 Sunrise: 06:42 AM
🌇 Sunset: 07:59 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Moderate rain
20°
/
14°
🌧️ 88% chance of rain
💧 Avg. humidity: 85%
💨 Max wind: 37.8 km/h
🌧️ Total precip: 13.76 mm
☀️ UV Index: 0.6
🌅 Sunrise: 06:40 AM
🌇 Sunset: 08:00 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Best Time to Visit Hamilton
Plan your trip to Hamilton, 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 Hamilton?
Current conditions in Hamilton: Clear, temperature 6°C, humidity 56%.
What is the best time to visit Hamilton?
The best time to visit Hamilton is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Hamilton?
Hamilton is located at approximately 43.3° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Hamilton?
The wettest period in Hamilton is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Hamilton?
For visits to Hamilton during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Hamilton in?
Hamilton is located in United States, in the state of Illinois.
What are the public holidays in Hamilton in 2026?
View the 2026 public holidays for Hamilton on our Holidays page.
What are the GPS coordinates used for the weather forecast in Hamilton?
The weather forecast for Hamilton uses coordinates 43.2561, -79.8729.