The climate in Quebec City has a continental climate with no dry season and a warm summer (Köppen: Dfb). It is fairly wet, at 47 inches of precipitation a year.

Temperature

Average daily temperatures in Quebec City range from -12.8 °C (9.0 °F) in January to 19.3 °C (66.7 °F) in July. The average annual mean temperature is 4.2 °C (39.6 °F). On average, there are 171 days per year with temperatures below freezing."Quebec City Climate Normals 1981-2010", date:Mar 2019 The average number of days in June, July, and August exceeding a threshold Humidex (i.e., humidity index – a heat-stress indicator combining temperature and dew point) value of 30 ("noticable discomfort") were 6.3, 13.3, and 10.6, respectively, for the 1991–2020 period. A Humidex value of 35 ("evident discomfort") was exceeded on average on 1.8, 3.9, and 2.1 days during those months.Climate Normals 1991–2020, Quebec Jean Lesage (Airport). Environment and Climate Change Canada. Retrieved 25 Sep 2026.

Averages

Average monthly maxima and minima

Extremes

Climate data for Quebec City (extremes)MonthJanFebMarAprMayJunJulAug SepOctNovDecYearRecord high daily minimum °C (°F)3.3(37.9)3.6(38.5)5.0(41.0)10.2(50.4)18.3(64.9)22.8(73.0)23.3(73.9)22.2(72.0)20.9(69.6)15.0(59.0)9.7(49.5)4.4(39.9)23.3(73.9)Record low daily maximum °C (°F)-25.8(-14.4)-25.0(-13.0)-20.0(-4.0)-10.2(13.6)1.7(35.1)7.8(46.0)13.9(57.0)12.2(54.0)4.2(39.6)0.0(32.0)-13.3(8.1)-27.3(-17.1)-27.3(-17.1)Record high monthly average °C (°F)-5.9(21.4)-4.0(24.8)0.1(32.4)7.7(45.9)15.3(59.5)19.7(67.5)22.5(72.5)21.4(70.5)16.5(61.7)10.8(51.4)3.2(37.8)-0.8(30.6)6.9(44.4)Record low monthly average °C (°F)-18.4(-1.1)-16.5(2.3)-11.4(11.5)-0.8(30.6)7.7(45.9)14.7(58.5)17.6(63.9)16.1(61.0)11.1(52.0)3.3(37.9)-5.0(23.0)-17.0(1.4)2.8(37.0)source 1:"Quebec Monthly Almanac", date=Mar 2019source 2:"Quebec Average Monthly Temperature Totals", date=Mar 2019

Days with certain temperature thresholdsMonthJanFebMarAprMayJunJulAugSepOct NovDecYearHot days (≥30 °C) 00000.2 1.3 2.6 0.8 0.130005.1Warm days (≥20 °C)0 0 0 0.8 9.3 20.4 27.9 25.5 9.1 1.1 0 0 94.1Mild days (≥10 °C)0 0.07 0.73 9.9 27.5 29.9 31 31 29.1 17.7 2.4 0.2 179.5Cold daylight (Max ≤0 °C) 26.7 22.8 13.4 1.4 0 0 0 0 0 0 7.7 22.9 94.9 Freezing days (below 0)30.9 27.7 28.9 16.5 2.3 0.07 0 0 0.87 10.1 23.0 30.3 170.7Cold days (≤-2 °C)30.3 26.7 24.9 9.9 0.53 0 0 0 0.07 5 18.3 28.6 144.3Very cold days (≤-10 °C)25.2 21.9 13.5 0.87 0 0 0 0 0 0 4.1 19.3 84.8Frigidly cold days (≤-20 °C)12.9 8.7 2.9 0 0 0 0 0 0 0 0.2 6.5 31.3

Precipitation

There are almost 900 mm of rain in Quebec City, The wettest month is July with 121.4 mm. While the driest is February of only 74.5. 1189.7 mm of total precipitation fall a year. Snowfall accumulates to 303.4 cm/yr.

Total precipitation

Precipitation data for Quebec CityMonthJanFebMarAprMayJunJulAugSepOctNovDecYearHighest monthly total precipitation161.7(6.4)186.0(7.3)177.8(7.0)183.0(7.2)259.6(10.2)231.2(9.1)256.4(10.1)216.8(8.5)213.6(8.4)234.0(9.2)177.8(7.0)239.0(9.4)1578.2(62.1)Highest 24 hour total precipitation 53.4(2.1)53.4(2.1)63.5(2.5)55.4(2.2)54.2(2.1)78.0(3.1)59.9(2.4)55.4(2.2)81.2(3.2)56.9(2.2)45.7(1.8)49.6(2.0)81.2(3.2)

References