Canada · 1991–2020

Best time to visit
Gloucester.

August leads for comfortable weather in Gloucester: typically 25.6°C by day, 14.4°C at night, with 78 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high25.6°C

Typical low14.4°C

Rain in August78 mm

Comfort

August

August · June · July

83climate match

Beach

July

July · August · June

59climate match

Outdoors

September

September · May · August

80climate match

The weakest month is January, scoring 5 against August’s 83 — days reach only -6°C, 30° 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

5-6° / -14.6°

Feb

5-3.6° / -13.1°

Mar

52.6° / -6.9°

Apr

2111.6° / 0.9°

May

5919.2° / 7.6°

Jun

8024.4° / 13.2°

Jul

7626.4° / 15.5°

Aug

8325.6° / 14.4°

Sep

6620.8° / 9.8°

Oct

2912.9° / 3.5°

Nov

55.8° / -2.1°

Dec

5-2° / -9.6°

Monthly climate evidence for Gloucester — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-6°C	-14.6°C	66 mm	10.7	9 h 05	5	Good coverage
February	-3.6°C	-13.1°C	50 mm	8.8	10 h 19	5	Good coverage
March	2.6°C	-6.9°C	68 mm	9	11 h 46	5	Good coverage
April	11.6°C	0.9°C	80 mm	9.7	13 h 26	21	Good coverage
May	19.2°C	7.6°C	76 mm	9.9	14 h 51	59	Good coverage
June	24.4°C	13.2°C	98 mm	10.3	15 h 38	80	Good coverage
July	26.4°C	15.5°C	96 mm	10.2	15 h 20	76	Good coverage
August	25.6°C	14.4°C	78 mm	8.4	14 h 06	83	Good coverage
September	20.8°C	9.8°C	90 mm	9.8	12 h 28	66	Good coverage
October	12.9°C	3.5°C	85 mm	10.4	10 h 52	29	Good coverage
November	5.8°C	-2.1°C	78 mm	9.8	9 h 27	5	Good coverage
December	-2°C	-9.6°C	74 mm	11.4	8 h 44	5	Good coverage

Records at OTTAWA MACDONALD-CARTIER INT'L, 1938–2011
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	12.9°C13 Jan 2005	-35.6°C15 Jan 1957	44 mm25 Jan 2010	146 mm1995 · driest 15 mm in 1961	73
February	12.4°C27 Feb 2000	-36.1°C15 Feb 1943	40 mm21 Feb 1997	168 mm1971 · driest 2 mm in 1978	73
March	26.7°C29 Mar 1946	-30.6°C3 Mar 1950	44 mm21 Mar 1980	138 mm1947 · driest 13 mm in 1957	73
April	31.1°C27 Apr 1990	-16.7°C4 Apr 1954	46 mm2 Apr 2005	167 mm2011 · driest 14 mm in 2001	73
May	35.8°C26 May 2010	-5.6°C7 May 1966	48 mm31 May 2008	164 mm1986 · driest 24 mm in 1944	73
June	36.1°C27 Jun 1941	-0.1°C9 Jun 1980	90 mm24 Jun 2011	225 mm2002 · driest 14 mm in 1991	73
July	36.7°C1 Jul 1963	5.0°C15 Jul 1946	70 mm9 Jul 1967	244 mm2009 · driest 28 mm in 1976	73
August	37.8°C14 Aug 1944	2.6°C29 Aug 1986	67 mm10 Aug 2004	186 mm1952 · driest 8 mm in 1957	73
September	35.1°C9 Sep 2002	-3.0°C29 Sep 1980	135 mm9 Sep 2004	173 mm1945 · driest 13 mm in 1948	73
October	27.8°C7 Oct 1946	-7.8°C20 Oct 1946	76 mm6 Oct 1995	189 mm1995 · driest 7 mm in 1947	73
November	23.9°C6 Nov 1938	-21.7°C29 Nov 1940	46 mm26 Nov 2000	166 mm1963 · driest 27 mm in 1939	74
December	16.3°C3 Dec 1982	-34.4°C20 Dec 1942	44 mm9 Dec 1973	144 mm1983 · driest 19 mm in 2002	73

Typical days per month at OTTAWA MACDONALD-CARTIER INT'L, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	2	16
February	0	0	27	1	13
March	0	0	27	2	9
April	<1	<1	12	3	3
May	5	<1	<1	3	<1
June	15	3	0	3	0
July	21	5	0	3	0
August	18	4	0	3	0
September	6	1	<1	3	0
October	<1	0	7	3	<1
November	0	0	20	2	6
December	0	0	29	2	14

How often, not how much — every day in OTTAWA MACDONALD-CARTIER INT'L’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%	36%	5%	48%	-9.8–-2.7°C
February	0%	33%	5%	43%	-7.1–-1.9°C
March	<1%	31%	7%	41%	-1.2–5.2°C
April	8%	31%	8%	37%	8.1–13.7°C
May	31%	32%	8%	40%	16.0–21.4°C
June	59%	31%	9%	40%	22.2–26.1°C
July	69%	30%	9%	36%	25.0–28.1°C
August	67%	27%	9%	29%	23.4–27.1°C
September	37%	30%	9%	38%	18.1–22.5°C
October	10%	31%	8%	39%	11.0–15.1°C
November	<1%	37%	8%	50%	2.7–7.9°C
December	0%	40%	8%	60%	-6.3–-0.1°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.

1939Each stripe is one year’s mean temperature against the 72-year average. Warmest: 1998. Coolest: 1940.2010

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5962204
NOAA station: CA006106000 · OTTAWA MACDONALD-CARTIER INT'L
Station distance: 4.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude 45.35°, 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 OTTAWA MACDONALD-CARTIER INT'L is what differs

Nepean→Bridlewood→Blossom Park→Greely→Richmond→Ramsayville→

Or put two places side by side: Gloucester vs Nepean

Best time to visitGloucester.