ClimateAverages

Waterloo Weather in September

JanFebMarAprMayJunJulAugSepOctNovDec
September daytime high
20.8°C
September overnight low
8.9°C
September average
14.9°C

In September, Waterloo typically sees daytime highs of 20.8°C and overnight lows around 8.9°C. Compared to the annual average high of 11.9°C, September runs +8.9°C.

vs. annual avg high
+8.9°C
Rank among 12 months
#4 warmest
Hottest year overall
2011

Where September ranks in Waterloo

JanFebMarAprMayJunJulAugSep21°OctNovDec

FAQ

What is the average temperature in Waterloo in September?

September in Waterloo averages a daytime high of 20.8°C and an overnight low of 8.9°C.

Is September warm or cold in Waterloo?

September runs +8.9°C compared to Waterloo's annual average high of 11.9°C, ranking #4 of 12 months by warmth.

What should I pack for Waterloo in September?

Plan for daytime highs near 20.8°C and cooler evenings around 8.9°C.

Other months for Waterloo

JanuaryFebruaryMarchAprilMayJuneJulyAugustOctoberNovemberDecember

September in nearby cities

TorontoLondonOttawaMississaugaNorth YorkScarboroughHamiltonBramptonEtobicokeWindsorMarkhamOshawa