Canada · 1991–2020

Best time to visit
Glen Cairn.

June leads for comfortable weather in Glen Cairn: typically 24°C by day, 13°C at night, with 87 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high24°C

Typical low13°C

Rain in June87 mm

Comfort

June

June · August · July

83climate match

Beach

July

July · August · June

65climate match

Outdoors

September

September · May · June

81climate match

The weakest month is January, scoring 5 against June’s 83 — days reach only -4.9°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

5-4.9° / -14°

Feb

5-3.2° / -13.1°

Mar

52.5° / -7.2°

Apr

2011.1° / 0.8°

May

6019.2° / 7.9°

Jun

8324° / 13°

Jul

7826.9° / 15.7°

Aug

8125.7° / 14.5°

Sep

7221.6° / 10°

Oct

3013.3° / 4°

Nov

56° / -2.1°

Dec

5-1.6° / -9°

Monthly climate evidence for Glen Cairn — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-4.9°C	-14°C	53 mm	9.2	9 h 05	5	Good coverage
February	-3.2°C	-13.1°C	51 mm	8.9	10 h 19	5	Good coverage
March	2.5°C	-7.2°C	60 mm	8.7	11 h 46	5	Good coverage
April	11.1°C	0.8°C	80 mm	9.4	13 h 26	20	Good coverage
May	19.2°C	7.9°C	76 mm	9.5	14 h 51	60	Good coverage
June	24°C	13°C	87 mm	9.9	15 h 38	83	Good coverage
July	26.9°C	15.7°C	84 mm	8.2	15 h 19	78	Good coverage
August	25.7°C	14.5°C	90 mm	8	14 h 06	81	Good coverage
September	21.6°C	10°C	80 mm	8.2	12 h 28	72	Good coverage
October	13.3°C	4°C	91 mm	10.5	10 h 52	30	Good coverage
November	6°C	-2.1°C	61 mm	8.8	9 h 27	5	Good coverage
December	-1.6°C	-9°C	73 mm	10.9	8 h 45	5	Good coverage

Records at OTTAWA CDA RCS, 2000–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	11.8°C30 Jan 2013	-31.8°C21 Jan 2022	43 mm25 Jan 2010	119 mm2006 · driest 15 mm in 2003	26
February	15.1°C28 Feb 2024	-32.5°C4 Feb 2023	34 mm16 Feb 2016	94 mm2016 · driest 14 mm in 2012	26
March	26.5°C21 Mar 2012	-28.6°C3 Mar 2003	33 mm5 Mar 2011	124 mm2008 · driest 19 mm in 2005	26
April	30.7°C27 Apr 2009	-11.3°C5 Apr 2004	44 mm2 Apr 2005	157 mm2019 · driest 11 mm in 2001	26
May	35.2°C26 May 2010	-2.7°C9 May 2020	55 mm1 May 2017	182 mm2017 · driest 11 mm in 2021	26
June	34.7°C23 Jun 2025	3.4°C1 Jun 2020	57 mm11 Jun 2002	184 mm2002 · driest 15 mm in 2020	26
July	36.4°C10 Jul 2020	6.9°C31 Jul 2010	83 mm25 Jul 2018	199 mm2009 · driest 15 mm in 2012	26
August	37.1°C9 Aug 2001	5.9°C27 Aug 2009	78 mm10 Aug 2023	190 mm2020 · driest 37 mm in 2001	25
September	35.3°C9 Sep 2002	-0.6°C19 Sep 2014	116 mm9 Sep 2004	148 mm2010 · driest 33 mm in 2007	25
October	30.3°C3 Oct 2023	-6.8°C19 Oct 2015	63 mm30 Oct 2017	168 mm2017 · driest 28 mm in 2022	24
November	23.0°C5 Nov 2022	-21.0°C23 Nov 2018	37 mm26 Nov 2000	102 mm2003 · driest 3 mm in 2007	26
December	17.0°C24 Dec 2015	-30.3°C20 Dec 2004	42 mm21 Dec 2018	114 mm2012 · driest 22 mm in 2002	26

Typical days per month at OTTAWA CDA RCS, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	30	1
February	0	0	27	1
March	<1	0	26	2
April	<1	<1	12	3
May	5	<1	<1	2
June	13	3	0	3
July	21	6	0	3
August	18	3	0	3
September	8	1	<1	2
October	<1	0	5	3
November	0	0	19	2
December	0	0	27	2

How often, not how much — every day in OTTAWA CDA RCS’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%	30%	4%	35%	-8.2–-1.8°C
February	0%	32%	4%	39%	-6.0–-0.4°C
March	<1%	28%	5%	35%	-0.1–6.4°C
April	7%	32%	10%	42%	9.1–13.6°C
May	36%	30%	8%	40%	16.9–21.7°C
June	58%	33%	9%	37%	22.8–25.3°C
July	71%	28%	9%	34%	24.7–29.1°C
August	71%	27%	9%	27%	24.3–27.6°C
September	47%	26%	8%	32%	19.9–23.3°C
October	13%	32%	8%	45%	11.4–16.2°C
November	1%	30%	6%	41%	3.5–8.5°C
December	0%	36%	7%	51%	-4.7–1.7°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.

2001Each stripe is one year’s mean temperature against the 23-year average. Warmest: 2010. Coolest: 2019.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5961863
NOAA station: CA006105978 · OTTAWA CDA RCS
Station distance: 16.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 19 usable years
Daylight: Calculated from latitude 45.29°, 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 CDA RCS is what differs

Bells Corners→Beaverbrook→Arbeatha Park→Arlington Woods→Beacon Hill South→Beaconwood→

Or put two places side by side: Glen Cairn vs Bells Corners

Best time to visitGlen Cairn.