Markham climate

Name: Markham
Address: CA

Markham is warmest in July, with average highs of 26 °C, and coldest in February, when nights average -9.3 °C. June is the wettest month (92 mm) and February the driest (50 mm). Figures are 1991–2020 climate normals.

Across a full year Markham averages 888 mm of rain, 51 days above 25 °C and 126 days below freezing.

Canada · population 338,503 · 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 -9.3 °C
Driest month February 50 mm
Wettest month June 92 mm
Least cloud August 51 % cloud
Hottest on record July 36 °C
Coldest on record February -28 °C

What to expectMarkham through the year

Markham has a clear annual cycle: average daily highs run from -0.6 °C in February to 26 °C in July, a swing of 27 °C in mean temperature across the year.

Counted across a normal year, 51 days a year reach 25 °C, 6 of them reach 30 °C, 126 nights drop below freezing. The warmest reading in the 1991–2020 record is 36 °C, in July.

Rain is spread fairly evenly through the year, from 50 mm in February to 92 mm in June. There is no dry season to aim for.

Month by month

Month	Avg high	Rainfall	Cloud
January	-1.5 °C	63 mm	76 %
February	-0.6 °C	50 mm	69 %
March	4.2 °C	59 mm	64 %
April	11.0 °C	81 mm	63 %
May	17.8 °C	82 mm	59 %
June	23.0 °C	92 mm	57 %
July	25.8 °C	86 mm	51 %
August	25.0 °C	82 mm	51 %
September	21.3 °C	77 mm	53 %
October	14.2 °C	81 mm	62 %
November	7.3 °C	71 mm	71 %
December	1.6 °C	63 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	-1.5 °C	-9.1 °C	-5.5 °C	14.9 °C	-27.3 °C	0	0	28
February	-0.6 °C	-9.3 °C	-5.3 °C	16.3 °C	-27.6 °C	0	0	26
March	4.2 °C	-4.6 °C	-0.6 °C	22.5 °C	-24.9 °C	0	0	25
April	11.0 °C	1.8 °C	6.0 °C	25.5 °C	-11.8 °C	0	0	10
May	17.8 °C	8.4 °C	12.9 °C	30.0 °C	-3.8 °C	3	0	0
June	23.0 °C	14.2 °C	18.5 °C	34.1 °C	4.1 °C	9	1	0
July	25.8 °C	17.3 °C	21.5 °C	35.6 °C	9.3 °C	18	3	0
August	25.0 °C	16.9 °C	20.8 °C	34.1 °C	9.0 °C	15	2	0
September	21.3 °C	13.5 °C	17.1 °C	32.1 °C	2.3 °C	6	0	0
October	14.2 °C	7.4 °C	10.4 °C	28.8 °C	-5.0 °C	0	0	1
November	7.3 °C	1.1 °C	3.9 °C	20.1 °C	-17.1 °C	0	0	12
December	1.6 °C	-4.5 °C	-1.6 °C	15.8 °C	-26.8 °C	0	0	24

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	63 mm	10	9.3 h/day	76 %	75 %	20 km/h
February	50 mm	8	10 h/day	69 %	73 %	20 km/h
March	59 mm	10	12 h/day	64 %	69 %	20 km/h
April	81 mm	11	13 h/day	63 %	66 %	20 km/h
May	82 mm	11	15 h/day	59 %	68 %	18 km/h
June	92 mm	12	15 h/day	57 %	70 %	17 km/h
July	86 mm	11	15 h/day	51 %	70 %	16 km/h
August	82 mm	10	14 h/day	51 %	73 %	16 km/h
September	77 mm	10	13 h/day	53 %	73 %	17 km/h
October	81 mm	11	11 h/day	62 %	74 %	19 km/h
November	71 mm	10	9.7 h/day	71 %	76 %	19 km/h
December	63 mm	10	8.9 h/day	76 %	77 %	20 km/h

How Markham 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
Markham	26 °C	-9.3 °C	888 mm	51
Vaughan · Canada	26 °C	-9.4 °C	812 mm	53
Toronto · Canada	25 °C	-8.1 °C	806 mm	43
Oshawa · Canada	25 °C	-8.1 °C	892 mm	40
Etobicoke · Canada	26 °C	-7.9 °C	804 mm	52
Mississauga · Canada	26 °C	-8.6 °C	881 mm	57
Brampton · Canada	26 °C	-9.6 °C	828 mm	60

Where Markham ranks

Ranking	Position	Value
The coolest places in North America in February	16thof 50	-0.6 °C
The coolest places in North America in March	18thof 50	4.2 °C
The coolest places in North America in April	19thof 50	11 °C
The coolest places in North America in January	20thof 50	-1.5 °C
The coolest places in North America year-round	20thof 50	12 °C
The coolest places in North America in December	21stof 50	1.6 °C

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

QuestionsCommon questions about Markham’s climate

When is the best time to visit Markham?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August 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 Markham 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 36 °C.

How cold does it get in winter?

Nights average -9.3 °C in February, the coldest month. A normal year has 126 nights below freezing.

Which month is wettest in Markham?

June, averaging 92 mm over 12 days with rain. The driest month is February with 50 mm. The year as a whole averages 888 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 Markham 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.