Markham weather in September

Long-run climate averages for Markham, Ontario in September, plus what the forecast models say for the days ahead.

September at a glance

In September, Markham averages 23°C by day and 14°C at night. The wettest month is usually April.

September in Markham averages a daytime high of 23°C and an overnight low of 14°C, which reads as warm for this part of the world. Across the whole year Markham sees roughly 1059 mm of precipitation.

Climate averages tell you what to pack. They do not tell you what next Tuesday looks like — for that, see the live Markham forecast with every model compared and how much they currently agree.

Markham weather by month

what to expect in Markham through the year

Here is Markham's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Markham by season.

Jan

1°

-5°

Cold

Feb

3°

-6°

Cold

Mar

6°

-3°

Cold

Apr

13°

3°

Cool

Wettest

May

20°

9°

Mild

Jun

24°

14°

Warm

Jul

27°

17°

Warm

Aug

25°

16°

Warm

Sep

23°

14°

Warm

Oct

16°

8°

Mild

Nov

8°

1°

Cool

Dec

3°

-2°

Cold

Common questions

How warm is Markham in September?

Markham averages a daytime high of 23°C in September, with overnight lows around 14°C. These are long-run climate averages, not a forecast — for the actual days ahead see the live model comparison.

Is September a good time to visit Markham?

The most comfortable time to visit Markham is usually May, June, August and September, when daytime highs sit in the pleasant 16-26°C range and the heaviest April rain is behind you.

Does it rain a lot in Markham in September?

The wettest month in Markham is usually April. Across the year the city sees roughly 1059 mm of precipitation.

Markham in other months

January February March April May June July August October November December

More about Markham

Markham live forecast Best time to visit Markham Which forecast is most accurate in Canada?