Climate averages 1991–2020

Longueuil weather
in January.

A freezing month with moderate precipitation: the coolest and the joint 2nd driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high -5.3°C Daytime mean, January

Average low -14.2°C Night-time mean, January

Precipitation 74 mm 11 days with ≥1 mm

Daylight 9 h Sunrise to sunset, per day

January is a freezing month in Longueuil: daytime highs average -5.3°C and nights cool to about -14.2°C. By daytime temperature it is the coolest month of the year.

Expect about 74 mm of precipitation on roughly 11 days, which makes January a month with moderate precipitation (the joint 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 08 min on an average January day.

The nearest other city in this atlas is Mercier–Hochelaga-Maisonneuve (9 km away). In January its highs average -5.4°C, about as warm as Longueuil, with 74 mm of precipitation.

Among the 86 cities listed in Canada, Longueuil ranks joint 64th of 86 for the warmest January highs and joint 50th of 86 for the driest January (precipitation, lowest first). The mean January high of those 86 cities is -2.3°C; Longueuil is 3.0°C cooler than that mean.

From January to February, average highs rise by 1.8°C to -3.5°C, and monthly precipitation falls from 74 mm to 60 mm.

The annual picture

January in context

30-year average

Average highAverage low°C

Monthly precipitation

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Longueuil climate table

1991–2020

Monthly climate averages for Longueuil, 1991–2020
Month	Average highHigh / low	Average low	Precipitation mm/month	Wet days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	-5.3°C-14.2°C	-14.2°C	74	10.5	9.19 h
February	-3.5°C-12.8°C	-12.8°C	60	9.3	10.310 h
March	2.4°C-6.9°C	-6.9°C	74	10.3	11.912 h
April	10.7°C0.7°C	0.7°C	103	11.7	13.513 h
May	18.5°C8.3°C	8.3°C	100	11.9	14.915 h
June	23.4°C14.3°C	14.3°C	108	12.2	15.616 h
July	25.7°C17.3°C	17.3°C	101	12.8	15.315 h
August	24.6°C16.5°C	16.5°C	102	11.6	14.114 h
September	20.4°C12.3°C	12.3°C	99	10.2	12.613 h
October	12.9°C5.9°C	5.9°C	112	11.5	11.011 h
November	5.6°C-0.7°C	-0.7°C	88	11.9	9.610 h
December	-1.3°C-8.5°C	-8.5°C	85	11.7	8.89 h

Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

January in nearby cities

Distance from Longueuil

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Longueuil) is explained once on the Longueuil year overview and on the Sources, method and limits page.

Montréal, Villeray–Saint-Michel–Parc-Extension and Mercier–Hochelaga-Maisonneuve lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.