How accurate is the forecast for McHenry?

Forecasts are pulled from leading meteorological models and refreshed automatically every 30 minutes. Short-range accuracy (next 24 hours) is typically within 1–2°C and 80–90% for precipitation.

How often is the data updated?

Current conditions and the hourly outlook refresh every 30 minutes; daily forecasts every hour.

What does the air-quality (AQI) value mean?

We display the European AQI on a scale from Good (0–20) to Extremely poor (>100), blending PM2.5, PM10, NO₂ and O₃.

Clima Map

McHenry US

July 12, 2026 · 12:39 am

27^°

Clear sky

Feels like 28°C

Humidity: 47%
Wind: 9 km/h ESE
Pressure: 1020 hPa
Cloud: 0%

7-day forecast

July 12, 2026 Mainly clear 0% 30°C / 16°C July 13, 2026 Overcast 1% 34°C / 19°C July 14, 2026 Overcast 0% 32°C / 21°C July 15, 2026 Overcast 2% 32°C / 22°C July 16, 2026 Thunderstorm 10% 31°C / 19°C July 17, 2026 Light drizzle 16% 30°C / 18°C July 18, 2026 Overcast 23% 31°C / 23°C

Nearby weather

Cities near McHenry

Compare weather conditions in surrounding cities and open any local forecast instantly.

5.6 km Johnsburg US View forecast 5.6 km Lakemoor US View forecast 8.8 km Island Lake US View forecast 9.8 km Fox Lake US View forecast 11 km Crystal Lake US View forecast 12.5 km Spring Grove US View forecast 13.4 km Wauconda US View forecast 14.4 km Round Lake US View forecast

Weather notice Forecasts are for general planning. During severe weather, follow official alerts and local authority instructions.