Montreal · Canada

Montreal in August: every year compared

In August, Montreal averages highs of 23.9 °C and lows of 14.3 °C, with 103 mm of precipitation. The warmest August was 2021 (21.8 °C), the coldest 1963 (15.9 °C).

Avg. highAvg. high 23.9 °C

Avg. lowAvg. low 14.3 °C

PrecipitationPrecipitation 103 mm

Rainy daysRainy days 12

Day by day through August

Normal high and low for each day of August in Montreal.

Normal high and low, day by dayNormal 1991–2020

Every August in Montreal, ranked

86 months of August since 1940. The last one, 2025, ranks 33 of 86 (±0.0 °C vs normal).

194019832025

2025 · 19.0 °C · ±0.0 °C vs normal · rank 33 of 86

Warmest years

1202121.8 °C
2201821.1 °C
3194720.9 °C
4197320.8 °C
5200120.8 °C

Coldest years

1196415.9 °C
2196315.9 °C
3198216.7 °C
4194116.8 °C
5195716.9 °C

All 86 years in a table

Year	Mean temperature	Daytime highs	Night lows	Precipitation	Hot days (30 °C+)	Rainy days
2025	19.0 °C	24.8 °C	13.3 °C	62 mm	4 days	7 days
2024	19.1 °C	23.6 °C	14.8 °C	226 mm	1 day	15 days
2023	18.1 °C	22.5 °C	13.6 °C	210 mm	0 days	17 days
2022	19.7 °C	24.7 °C	14.7 °C	124 mm	1 day	15 days
2021	21.8 °C	26.7 °C	17.3 °C	45 mm	7 days	11 days
2020	18.8 °C	23.6 °C	14.3 °C	181 mm	0 days	15 days
2019	18.8 °C	24.0 °C	13.7 °C	70 mm	0 days	12 days
2018	21.1 °C	25.9 °C	16.7 °C	83 mm	2 days	15 days
2017	18.0 °C	22.9 °C	13.5 °C	145 mm	0 days	9 days
2016	20.4 °C	25.2 °C	15.7 °C	119 mm	2 days	11 days
2015	19.6 °C	24.3 °C	15.3 °C	66 mm	1 day	10 days
2014	18.7 °C	23.9 °C	13.8 °C	103 mm	0 days	11 days
2013	18.8 °C	23.9 °C	13.9 °C	77 mm	0 days	16 days
2012	20.2 °C	25.5 °C	15.1 °C	84 mm	2 days	11 days
2011	19.1 °C	24.2 °C	14.8 °C	183 mm	0 days	13 days
2010	19.1 °C	23.9 °C	14.3 °C	107 mm	1 day	12 days
2009	19.3 °C	23.8 °C	14.7 °C	92 mm	1 day	11 days
2008	18.0 °C	22.9 °C	13.7 °C	70 mm	0 days	15 days
2007	18.4 °C	23.4 °C	13.1 °C	61 mm	1 day	11 days
2006	17.8 °C	23.0 °C	12.8 °C	130 mm	1 day	11 days
2005	19.9 °C	24.8 °C	15.0 °C	139 mm	0 days	10 days
2004	17.8 °C	22.3 °C	13.2 °C	133 mm	0 days	12 days
2003	19.8 °C	24.5 °C	15.5 °C	107 mm	0 days	13 days
2002	19.9 °C	25.3 °C	14.5 °C	26 mm	3 days	5 days
2001	20.8 °C	26.5 °C	15.1 °C	101 mm	6 days	10 days
2000	18.3 °C	22.9 °C	13.7 °C	100 mm	0 days	10 days
1999	18.4 °C	23.3 °C	13.6 °C	66 mm	0 days	9 days
1998	19.1 °C	23.9 °C	14.8 °C	77 mm	0 days	13 days
1997	17.6 °C	22.3 °C	13.1 °C	145 mm	0 days	12 days
1996	19.0 °C	24.2 °C	14.4 °C	76 mm	0 days	10 days
1995	19.2 °C	24.1 °C	14.4 °C	130 mm	0 days	9 days
1994	17.3 °C	21.8 °C	12.6 °C	73 mm	0 days	12 days
1993	19.5 °C	24.8 °C	14.8 °C	118 mm	1 day	13 days
1992	17.8 °C	22.5 °C	13.4 °C	101 mm	0 days	13 days
1991	19.7 °C	24.6 °C	15.3 °C	114 mm	1 day	14 days
1990	19.0 °C	24.4 °C	14.3 °C	151 mm	0 days	9 days
1989	18.6 °C	23.9 °C	14.0 °C	71 mm	0 days	7 days
1988	19.8 °C	24.7 °C	15.6 °C	102 mm	6 days	11 days
1987	17.8 °C	23.3 °C	12.1 °C	60 mm	1 day	10 days
1986	17.4 °C	22.3 °C	12.9 °C	176 mm	0 days	15 days
1985	18.8 °C	24.1 °C	14.1 °C	68 mm	3 days	9 days
1984	19.8 °C	24.8 °C	15.5 °C	107 mm	0 days	14 days
1983	19.5 °C	25.0 °C	14.7 °C	80 mm	0 days	10 days
1982	16.7 °C	21.6 °C	11.7 °C	147 mm	0 days	14 days
1981	17.9 °C	23.3 °C	13.2 °C	144 mm	0 days	14 days
1980	19.4 °C	24.4 °C	14.7 °C	96 mm	0 days	15 days
1979	17.5 °C	21.8 °C	13.2 °C	112 mm	0 days	16 days
1978	18.6 °C	23.5 °C	13.4 °C	72 mm	0 days	12 days
1977	17.8 °C	22.6 °C	12.6 °C	123 mm	2 days	14 days
1976	17.9 °C	22.9 °C	12.7 °C	132 mm	0 days	14 days
1975	19.2 °C	24.6 °C	13.7 °C	66 mm	3 days	12 days
1974	18.4 °C	23.9 °C	12.9 °C	61 mm	0 days	13 days
1973	20.8 °C	25.9 °C	16.4 °C	72 mm	0 days	12 days
1972	17.1 °C	22.2 °C	12.1 °C	134 mm	0 days	13 days
1971	17.9 °C	22.9 °C	12.7 °C	115 mm	0 days	11 days
1970	19.1 °C	24.1 °C	14.0 °C	84 mm	2 days	9 days
1969	19.7 °C	24.4 °C	14.6 °C	58 mm	0 days	11 days
1968	17.0 °C	21.5 °C	11.7 °C	81 mm	0 days	9 days
1967	18.1 °C	22.8 °C	13.5 °C	120 mm	0 days	14 days
1966	18.3 °C	23.3 °C	13.5 °C	99 mm	1 day	11 days
1965	17.5 °C	22.1 °C	13.0 °C	131 mm	0 days	18 days
1964	15.9 °C	20.4 °C	11.3 °C	126 mm	0 days	12 days
1963	15.9 °C	20.5 °C	11.7 °C	192 mm	0 days	17 days
1962	18.0 °C	22.8 °C	13.6 °C	97 mm	0 days	12 days
1961	18.2 °C	22.9 °C	14.0 °C	100 mm	0 days	16 days
1960	18.6 °C	24.6 °C	12.9 °C	36 mm	2 days	6 days
1959	19.8 °C	24.2 °C	15.6 °C	149 mm	0 days	17 days
1958	18.1 °C	23.2 °C	12.8 °C	120 mm	0 days	16 days
1957	16.9 °C	22.4 °C	11.3 °C	13 mm	0 days	2 days
1956	17.8 °C	22.7 °C	12.4 °C	117 mm	0 days	16 days
1955	20.6 °C	25.6 °C	15.7 °C	110 mm	4 days	13 days
1954	16.9 °C	21.8 °C	12.1 °C	106 mm	0 days	11 days
1953	18.3 °C	23.6 °C	13.1 °C	66 mm	2 days	5 days
1952	18.7 °C	23.6 °C	13.8 °C	79 mm	0 days	7 days
1951	17.1 °C	21.6 °C	12.3 °C	93 mm	0 days	12 days
1950	17.4 °C	22.6 °C	12.4 °C	130 mm	0 days	12 days
1949	20.0 °C	25.4 °C	14.8 °C	128 mm	3 days	11 days
1948	19.4 °C	24.3 °C	14.7 °C	68 mm	4 days	9 days
1947	20.9 °C	25.5 °C	16.5 °C	60 mm	4 days	8 days
1946	17.2 °C	21.5 °C	13.1 °C	103 mm	0 days	13 days
1945	18.8 °C	22.9 °C	14.9 °C	100 mm	0 days	11 days
1944	20.1 °C	24.6 °C	15.8 °C	34 mm	5 days	6 days
1943	17.7 °C	21.3 °C	14.2 °C	66 mm	0 days	12 days
1942	18.5 °C	22.6 °C	14.4 °C	38 mm	1 day	7 days
1941	16.8 °C	20.8 °C	12.7 °C	110 mm	0 days	13 days
1940	18.3 °C	22.6 °C	13.9 °C	59 mm	0 days	6 days

August records

Hottest day

34.7 °C

August 9, 2001 estimate

Nearby station: 36.0 °C on August 17, 1987 measured

Coldest night

1.7 °C

August 31, 1965 estimate

Nearby station: 2.5 °C on August 25, 1989 measured

Wettest day

106 mm

August 9, 2024 estimate

The weather on your birthday in Montreal

Any day since 1940: high, low, rain, snow, and how warm it was compared with the same date in every other year.

Questions & answers

How warm is Montreal in August?

Highs average 23.9 °C and lows 14.3 °C. A typical August brings 1 hot days (30 °C or more) and 0 frost days.

Does it rain a lot in Montreal in August?

About 103 mm falls in August, over some 12 days with at least 1 mm. The wettest August was 2024 (226 mm), the driest 1957 (13 mm).

What was the warmest August in Montreal?

2021, with a mean temperature of 21.8 °C. The coldest was 1963 (15.9 °C). The last one, 2025, ranks 33 of 86.