Longueuil weather in September
Long-run climate averages for Longueuil, Quebec in September, plus what the forecast models say for the days ahead.
In September, Longueuil averages 23°C by day and 14°C at night. The wettest month is usually August.
September in Longueuil 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 Longueuil sees roughly 1211 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 Longueuil forecast with every model compared and how much they currently agree.
Longueuil weather by month
what to expect in Longueuil through the yearHere is Longueuil'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 Longueuil by season.