When visiting Hamilton, make sure you wear layers of clothing, which can prepare you for whatever part of the city you’re in: Hamilton’s climate of the lower city (downtown) is in general much more sheltered and milder than on top of "the mountain".

Overall, though, Hamilton has a humid continental climate, one which is relatively mild compared with most of Canada. The average January temperature is -3.6C (26.5F) but most days rise just above freezing making for slushy conditions during snowfalls. Winter snowfall averages 113cm (44") with great year-to-year variation. The average July temperature is 22.5C (72.5F) and humidity is usually high during the summer, May through early October.

In the winter, it is not uncommon for lower city residents, with no snow present in their neighborhoods, to drive up into the upper city and be surprised at encountering a thick blanket of fresh white snow. The escarpment also affects summer weather; temperatures downtown are many degrees warmer, particularly at night, and often an inversion will combine with the physical barrier of the escarpment to trap smog in the downtown area, sometimes reducing downtown visibility to less than 2km.

Current Hamilton Weather

Observed at Hamilton Munro Int'l Airport on 2010-03-11 05:00:00

	2°C Mainly Clear
		Feels Like		Wind	NE 21 km/h
		Humidity	85 %	Pressure	101.3 kPa rising
		Dew Point	0.1°C	Visibility	24.1 km
		Air Quality		Temperature	2.4°C

Short Term Forecast

	Thursday	Thursday Night	Friday	Saturday	Sunday
	Sunny With Cloudy Periods	Chance Of Showers	Chance Of Showers	Periods Of Rain	Periods Of Rain
Low		5°C		4°C	5°C
High	10°C		12°C	9°C	9°C

Detailed Hamilton Weather Forecast

Thursday	Sunny with cloudy periods. High 10. UV index 3 or moderate. Forecast issued 05:00 AM EDT Thursday 11 March 2010
Thursday Night	Increasing cloudiness. 60 percent chance of showers overnight. Low plus 5. Forecast issued 05:00 AM EDT Thursday 11 March 2010
Friday	Cloudy. 60 percent chance of showers in the morning and in the evening. Wind becoming east 30 km/h late in the day. High 12. Forecast issued 05:00 AM EDT Thursday 11 March 2010
Saturday	Periods of rain. Windy. Low plus 4. High 9. Forecast issued 05:00 AM EDT Thursday 11 March 2010
Sunday	Periods of rain. Windy. Low plus 5. High 9. Forecast issued 05:00 AM EDT Thursday 11 March 2010
Monday	Cloudy with 70 percent chance of showers. Low plus 3. High 8. Forecast issued 05:00 AM EDT Thursday 11 March 2010
Tuesday	Sunny. Low zero. High 9. Forecast issued 05:00 AM EDT Thursday 11 March 2010
Wednesday	Sunny. Low minus 2. High 8. Forecast issued 05:00 AM EDT Thursday 11 March 2010