The climate of Eastern Ontario is humid continental with large seasonal variation. Snow and ice are dominant during the winter season. Summers are fairly warm and humid, usually lasting a little longer than winter does. The average July maximum temperature is 27C (80F). Temperatures rarely exceed 35C (95F), but during periods of hot weather, high humidity is often an aggravating factor.

Spring and fall are changabale seasons, prone to extremes in temperature and unpredictable swings in conditions. So when you visit here, make sure you bring clothes that can be worn in layers. Cornwall is generally a flat plain, dotted with some extensive woodlots and marshes, but is primarily farmland.

Current Cornwall Weather

Observed at on

The current weather conditions have not been observed.

Short Term Forecast

	Wednesday	Wednesday Night	Thursday	Friday	Saturday
	Sunny	Clear	Sunny With Cloudy Periods	Chance Of Showers	Rain
Low		-3°C		-1°C	2°C
High	9°C		10°C	11°C	5°C

Detailed Cornwall Weather Forecast

Wednesday	Sunny. High 9. UV index 4 or moderate. Forecast issued 05:00 AM EDT Wednesday 10 March 2010
Wednesday Night	Clear. Low minus 3. Forecast issued 05:00 AM EDT Wednesday 10 March 2010
Thursday	Sunny. Becoming cloudy periods in the afternoon. Wind becoming east 20 km/h late in the day. High 10. Forecast issued 05:00 AM EDT Wednesday 10 March 2010
Friday	Cloudy with 60 percent chance of showers. Low minus 1. High 11. Forecast issued 05:00 AM EDT Wednesday 10 March 2010
Saturday	Rain. Low plus 2. High plus 5. Forecast issued 05:00 AM EDT Wednesday 10 March 2010
Sunday	Rain mixed with snow. Low zero. High plus 5. Forecast issued 05:00 AM EDT Wednesday 10 March 2010
Monday	Cloudy with 60 percent chance of flurries or rain showers. Low zero. High 7. Forecast issued 05:00 AM EDT Wednesday 10 March 2010
Tuesday	A mix of sun and cloud. Low minus 4. High 7. Forecast issued 05:00 AM EDT Wednesday 10 March 2010