Catharines
No need to modify usual outdoor activities unless you experience symptoms such as coughing or throat irritation.
Catharines Live Precipitation Radar
Full Screen ViewCatharines Live Doppler RadarMSC Dual-Pol
Catharines, ON • Lat: 52.50° N, Lon: 89.71° W • Sweep 10m
Catharines 30-Year Weather History & Monthly Averages
Explore month-by-month temperatures, annual snowfall in cm, rainy days, and historical record highs and lows.
Catharines Air Quality & Wildfire Smoke Report
Detailed Canadian AQHI breakdown, fine particulate matter (PM2.5), ground-level ozone, and health guidance.
Frequently Asked Questions About Weather in Catharines, ON
What is the current temperature and conditions in Catharines?
As of today, the temperature in Catharines is 11.1°C with clear sky. The apparent temperature (feels like) is 5.5°C with relative humidity at 41%.
How does Wind Chill and Humidex affect Catharines?
During warmer conditions, the Canadian Humidex indicates comfort levels. The current Humidex is 11 (Comfortable).
What is the Air Quality Health Index (AQHI) for Catharines?
The current AQHI for Catharines is 4 (Moderate Risk). It is calculated based on ground-level ozone, fine particulate matter (PM2.5), and nitrogen dioxide levels according to Health Canada standards.
Where does the meteorological data for Catharines come from?
Forecasts are generated using high-resolution Canadian Deterministic Prediction System (HRDPS 2.5km) and Global Environmental Multiscale (GEM) models alongside official Environment and Climate Change Canada Doppler radar feeds.