Hamilton climate

Name: Hamilton
Address: CA

Hamilton is warmest in July, with average highs of 26 °C, and coldest in February, when nights average -7.0 °C. April is the wettest month (93 mm) and February the driest (56 mm). Figures are 1991–2020 climate normals.

Across a full year Hamilton averages 913 mm of rain, 58 days above 25 °C and 107 days below freezing.

Canada · population 569,353 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 26 °C
Coldest month February -7.0 °C
Driest month February 56 mm
Wettest month April 93 mm
Least cloud August 49 % cloud
Hottest on record July 34 °C
Coldest on record February -27 °C

What to expectHamilton through the year

Hamilton has a clear annual cycle: average daily highs run from 0.2 °C in February to 26 °C in July, a swing of 26 °C in mean temperature across the year.

Counted across a normal year, 58 days a year reach 25 °C, 6 of them reach 30 °C, 107 nights drop below freezing. The warmest reading in the 1991–2020 record is 34 °C, in July.

Rain is spread fairly evenly through the year, from 56 mm in February to 93 mm in April. There is no dry season to aim for.

Month by month

Month	Avg high	Rainfall	Cloud
January	-0.4 °C	70 mm	77 %
February	0.2 °C	56 mm	69 %
March	4.4 °C	68 mm	64 %
April	10.4 °C	93 mm	63 %
May	17.5 °C	83 mm	59 %
June	23.4 °C	86 mm	55 %
July	26.4 °C	78 mm	49 %
August	25.6 °C	69 mm	49 %
September	21.9 °C	75 mm	51 %
October	14.8 °C	83 mm	60 %
November	8.0 °C	78 mm	69 %
December	2.7 °C	72 mm	76 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	-0.4 °C	-6.7 °C	-3.8 °C	13.9 °C	-26.0 °C	0	0	26
February	0.2 °C	-7.0 °C	-3.9 °C	17.8 °C	-26.7 °C	0	0	25
March	4.4 °C	-3.2 °C	0.1 °C	23.6 °C	-22.6 °C	0	0	22
April	10.4 °C	2.8 °C	6.1 °C	25.8 °C	-10.8 °C	0	0	6
May	17.5 °C	9.7 °C	13.3 °C	32.2 °C	-2.6 °C	2	0	0
June	23.4 °C	15.9 °C	19.4 °C	33.1 °C	5.8 °C	10	1	0
July	26.4 °C	19.0 °C	22.6 °C	34.0 °C	11.8 °C	21	4	0
August	25.6 °C	18.6 °C	21.9 °C	33.2 °C	10.6 °C	18	2	0
September	21.9 °C	15.2 °C	18.3 °C	32.2 °C	4.1 °C	7	0	0
October	14.8 °C	9.0 °C	11.6 °C	29.8 °C	-3.3 °C	0	0	0
November	8.0 °C	2.8 °C	5.1 °C	21.3 °C	-11.7 °C	0	0	7
December	2.7 °C	-2.3 °C	-0.1 °C	15.6 °C	-22.6 °C	0	0	20

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	70 mm	11	9.3 h/day	77 %	75 %	24 km/h
February	56 mm	8	10 h/day	69 %	73 %	23 km/h
March	68 mm	10	12 h/day	64 %	72 %	21 km/h
April	93 mm	11	13 h/day	63 %	70 %	21 km/h
May	83 mm	11	15 h/day	59 %	71 %	18 km/h
June	86 mm	11	15 h/day	55 %	72 %	17 km/h
July	78 mm	10	15 h/day	49 %	70 %	17 km/h
August	69 mm	9	14 h/day	49 %	72 %	17 km/h
September	75 mm	9	13 h/day	51 %	73 %	19 km/h
October	83 mm	11	11 h/day	60 %	74 %	22 km/h
November	78 mm	10	9.7 h/day	69 %	75 %	23 km/h
December	72 mm	11	9.0 h/day	76 %	76 %	23 km/h

How Hamilton compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Hamilton	26 °C	-7.0 °C	913 mm	58
Mississauga · Canada	26 °C	-8.6 °C	881 mm	57
Brampton · Canada	26 °C	-9.6 °C	828 mm	60
Etobicoke · Canada	26 °C	-7.9 °C	804 mm	52
Kitchener · Canada	26 °C	-10 °C	920 mm	52
Toronto · Canada	25 °C	-8.1 °C	806 mm	43
Vaughan · Canada	26 °C	-9.4 °C	812 mm	53

Where Hamilton ranks

Ranking	Position	Value
The coolest places in North America in April	13thof 50	10 °C
The coolest places in North America in May	17thof 50	18 °C
The coolest places in North America in March	20thof 50	4.4 °C
The coolest places in North America year-round	24thof 50	13 °C
The coolest places in North America in February	26thof 50	0.2 °C
The coolest places in North America in January	28thof 50	-0.4 °C

Planning a trip? See the best time to visit Hamilton.

QuestionsCommon questions about Hamilton’s climate

When is the best time to visit Hamilton?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, August, September sit closest to 20 °C on average, July is the warmest month and February the driest. The month-by-month table above has the full picture.

How hot does Hamilton get?

In July, the warmest month, daily highs average 26 °C. About 6 days a year pass 30 °C. The highest value in the 1991–2020 record is 34 °C.

How cold does it get in winter?

Nights average -7.0 °C in February, the coldest month. A normal year has 107 nights below freezing.

Which month is wettest in Hamilton?

April, averaging 93 mm over 11 days with rain. The driest month is February with 56 mm. The year as a whole averages 913 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Hamilton rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.