Canada · 1991–2020

Best time to visit
Beauharnois.

August leads for comfortable weather in Beauharnois: typically 25.6°C by day, 14.6°C at night, with 77 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high25.6°C

Typical low14.6°C

Rain in August77 mm

Comfort

August

August · June · July

83climate match

Beach

July

July · August · June

58climate match

Outdoors

September

September · May · August

79climate match

The weakest month is January, scoring 5 against August’s 83 — days reach only -4.6°C, 29° below the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

5-4.6° / -13.5°

Feb

5-3.4° / -12.4°

Mar

52.6° / -6.2°

Apr

2011.2° / 1.3°

May

5919.6° / 8.1°

Jun

8024.4° / 13.6°

Jul

7326.6° / 15.9°

Aug

8325.6° / 14.6°

Sep

6821.2° / 10°

Oct

3113.9° / 4.7°

Nov

56° / -1.3°

Dec

5-0.5° / -7.8°

Monthly climate evidence for Beauharnois — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-4.6°C	-13.5°C	71 mm	11.5	9 h 05	5	Strong coverage
February	-3.4°C	-12.4°C	57 mm	9.5	10 h 19	5	Strong coverage
March	2.6°C	-6.2°C	61 mm	9.8	11 h 46	5	Strong coverage
April	11.2°C	1.3°C	82 mm	10.4	13 h 26	20	Strong coverage
May	19.6°C	8.1°C	89 mm	10.1	14 h 51	59	Strong coverage
June	24.4°C	13.6°C	100 mm	11.1	15 h 38	80	Strong coverage
July	26.6°C	15.9°C	102 mm	11	15 h 19	73	Strong coverage
August	25.6°C	14.6°C	77 mm	9.3	14 h 06	83	Good coverage
September	21.2°C	10°C	87 mm	9.6	12 h 28	68	Good coverage
October	13.9°C	4.7°C	107 mm	11.1	10 h 52	31	Good coverage
November	6°C	-1.3°C	76 mm	11	9 h 27	5	Strong coverage
December	-0.5°C	-7.8°C	79 mm	12.6	8 h 45	5	Strong coverage

Records at STE MARTINE, 1963–2023
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	14.0°C15 Jan 1995	-36.0°C27 Jan 1994	57 mm12 Jan 2018	151 mm1978 · driest 14 mm in 1980	58
February	17.0°C22 Feb 1981	-36.7°C23 Feb 1972	37 mm12 Feb 2019	112 mm1972 · driest 2 mm in 2010	56
March	26.5°C21 Mar 2012	-33.0°C2 Mar 1992	65 mm14 Mar 2017	117 mm1998 · driest 14 mm in 2015	58
April	31.0°C27 Apr 2009	-14.5°C5 Apr 1995	45 mm30 Apr 2014	153 mm1993 · driest 0 mm in 2017	58
May	35.9°C27 May 2020	-5.6°C7 May 1966	64 mm19 May 2006	184 mm2006 · driest 8 mm in 2017	57
June	35.3°C1 Jun 2023	-1.1°C1 Jun 1966	77 mm11 Jun 2002	188 mm1972 · driest 21 mm in 1965	58
July	35.5°C2 Jul 2018	4.5°C2 Jul 1992	67 mm25 Jul 2018	228 mm1974 · driest 0 mm in 2019	56
August	36.7°C2 Aug 1975	1.1°C31 Aug 1965	67 mm7 Aug 1972	213 mm1965 · driest 20 mm in 2009	54
September	35.0°C9 Sep 2002	-3.0°C29 Sep 1980	72 mm22 Sep 1970	186 mm1975 · driest 0 mm in 2023	54
October	29.4°C2 Oct 1968	-8.3°C31 Oct 1966	68 mm21 Oct 1995	204 mm2005 · driest 14 mm in 1963	53
November	24.0°C10 Nov 2020	-20.0°C29 Nov 1978	127 mm8 Nov 1996	174 mm1996 · driest 9 mm in 2012	56
December	18.0°C6 Dec 1998	-33.0°C26 Dec 1980	38 mm26 Dec 1969	152 mm2012 · driest 9 mm in 1992	56

Typical days per month at STE MARTINE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	2	9
February	0	0	25	2	7
March	0	0	24	2	5
April	<1	<1	12	3	2
May	5	1	<1	3	<1
June	14	4	0	3	0
July	20	5	0	3	0
August	17	3	0	2	0
September	6	<1	<1	3	0
October	<1	0	5	3	<1
November	0	0	17	2	3
December	0	0	26	2	7

How often, not how much — every day in STE MARTINE’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	0%	35%	6%	51%	-9.0–-1.6°C
February	0%	33%	6%	43%	-7.2–-0.5°C
March	<1%	31%	7%	42%	-0.6–5.3°C
April	7%	35%	9%	44%	8.9–13.5°C
May	31%	34%	8%	48%	16.9–22.3°C
June	55%	37%	11%	49%	22.1–25.8°C
July	64%	36%	10%	48%	24.9–27.9°C
August	63%	33%	11%	41%	23.6–27.0°C
September	38%	33%	11%	44%	18.7–23.0°C
October	11%	35%	9%	49%	11.3–15.9°C
November	<1%	39%	9%	58%	2.9–8.4°C
December	0%	39%	9%	61%	-5.3–1.8°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1963Each stripe is one year’s mean temperature against the 48-year average. Warmest: 2012. Coolest: 1972.2015

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5896495
NOAA station: CA007027540 · STE MARTINE
Station distance: 10.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 45.31°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from STE MARTINE is what differs

Mercier→Sainte-Martine→Allan's Corners→Bellevue→Howick→Laberge→

Or put two places side by side: Beauharnois vs Mercier

Best time to visitBeauharnois.