Markham, Canada — Weather in May 2027

Climate Overview

Markham, Canada in May has mild conditions, with highs averaging 17.5°C (64°F) and noticeably cooler mornings. Rain falls on about 12 days this month.

This month falls at the end of Spring.

Daily highs in May gradually rise from around 14°C (57°F) at the start to 21°C (70°F) by month's end.

May sees fairly even rainfall, totalling about 80 mm across the month.

Expect around 7.5h of sunshine at the start of May, increasing to 11.4h by the end.

The warmest days tend to fall around the 31th, averaging 21.5°C (71°F).

Compared to April, this month is about 7°C warmer with 1 fewer rainy days. Temperatures will rise further into June.

Monthly May Averages

Temperature

18°C / 9°C

Feels Like

16°C / 6°C

Rain

12 days · 80 mm

Sunshine

10.5h / day

Humidity

69% — Humid

Wind

18 km/h

Wind Direction

NW (314°)

Gusts

40 km/h

Daylight

14.8 h

Cloud Cover

61%

Clear Sky Days

3.8

UV Index

6 — High

Dew Point

8°C — Dry

Moon Phase

Waxing Gibbous · 66%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 05:53

Daylight 14.7h

Sunset 20:37

What to Expect

Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Rain usually comes in shorter passing showers rather than all-day rain.

2 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	-1°C / -7°C	-5°C / -12°C	10days (67 mm) Wet	4.9h Fair	76% Humid	1.9 Low	Poor	View Details
February	1°C / -7°C	-4°C / -12°C	10days (62 mm) Wet	6.4h Fair	74% Muggy	3 Moderate	Poor	View Details
March	5°C / -3°C	1°C / -8°C	12days (73 mm) Wet	7.5h Good	69% Muggy	3.9 Moderate	Poor	View Details
April	11°C / 2°C	8°C / -2°C	13days (98 mm) Wet	8.7h Good	68% Muggy	4.8 Moderate	Poor	View Details
May best	18°C / 9°C	16°C / 6°C	12days (80 mm) Wet	10.5h Excellent	69% Muggy	6 High	Good	View Details
June best	23°C / 15°C	24°C / 14°C	11days (95 mm) Wet	11.8h Excellent	68% Muggy	6.4 High	Excellent	View Details
July best	26°C / 18°C	28°C / 19°C	13days (89 mm) Wet	12.2h Excellent	71% Muggy	6.8 High	Excellent	View Details
August best	25°C / 18°C	27°C / 18°C	10days (90 mm) Wet	11.2h Excellent	73% Muggy	6 High	Excellent	View Details
September best	22°C / 14°C	22°C / 14°C	8days (62 mm) Wet	9.7h Good	74% Muggy	5.1 High	Excellent	View Details
October	15°C / 9°C	13°C / 6°C	11days (81 mm) Wet	6.9h Fair	74% Muggy	3.3 Moderate	Fair	View Details
November	7°C / 1°C	4°C / -3°C	11days (60 mm) Wet	5.5h Fair	75% Muggy	2.1 Moderate	Poor	View Details
December	2°C / -4°C	-2°C / -8°C	12days (74 mm) Wet	4.2h Fair	77% Humid	1.5 Low	Poor	View Details

What to Wear

Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility between indoors and outdoors.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Layered clothingLight jacketUmbrellaWaterproof jacketComfortable walking shoes

Frequently Asked Questions

Expand all

Is May a good time to visit Markham?

May is typically good for visiting Markham, with average highs of 18°C (64°F) and around 12 rainy days. Markham, Canada in May has mild conditions, with highs averaging 17.5°C (64°F) and noticeably cooler mornings. Rain fall

Does it rain a lot in Markham in May?

Markham typically sees around 12 rainy days in May with 80 mm (3.1 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Markham in May?

Nights in Markham during May are cool at around 9°C (48°F). Bring a jacket or sweater for evenings.

What should I pack for Markham in May?

With highs of 18°C (64°F) and lows of 9°C (48°F) in May, we recommend: Layered clothing, Light jacket, Umbrella, Waterproof jacket, Comfortable walking shoes. Comfortable walking shoes are essential.

Is May among the best months weather-wise in Markham?

Yes, May offers some of the best weather conditions in Markham with comfortable temperatures and lower chances of rain.

What is the UV index in Markham in May?

The average UV index in Markham during May is 6 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.

How many hours of daylight are there in Markham in May?

Markham gets approximately 15 hours of daylight per day in May, with around 11 hours of sunshine.

Does it snow in Markham in May?

Snow is uncommon in Markham during May based on 10-year climate averages.

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