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Canada · 1991–2020

Best time to visit
Chemainus.

July leads for comfortable weather in Chemainus: typically 24.1°C by day, 14.3°C at night, with 22 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high24.1°C

Typical low14.3°C

Rain in July22 mm

Comfort

July

July · August · June

98climate match

Beach

July

July · August · June

66climate match

Outdoors

September

September · June · May

89climate match

The weakest month is January, scoring 5 against July’s 98 — days reach only 6.7°C, 17° 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

56.7° / 2.4°

Feb

58.1° / 2.3°

Mar

1210.7° / 3.7°

Apr

3713.9° / 5.6°

May

6418.3° / 9.2°

Jun

8021° / 11.8°

Jul

9824.1° / 14.3°

Aug

9723.9° / 14.4°

Sep

7520.2° / 11.6°

Oct

3114° / 7.5°

Nov

59.2° / 4.3°

Dec

56.2° / 2.3°

Monthly climate evidence for Chemainus — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 24 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	6.7°C	2.4°C	244 mm	16.5	6.9°C	8 h 40	5	Strong coverage
February	8.1°C	2.3°C	130 mm	12	7.0°C	10 h 04	5	Strong coverage
March	10.7°C	3.7°C	135 mm	14.1	7.9°C	11 h 43	12	Strong coverage
April	13.9°C	5.6°C	73 mm	11.4	9.8°C	13 h 37	37	Strong coverage
May	18.3°C	9.2°C	48 mm	8.2	12.8°C	15 h 15	64	Strong coverage
June	21°C	11.8°C	40 mm	6.7	15.2°C	16 h 10	80	Strong coverage
July	24.1°C	14.3°C	22 mm	3.9	17.1°C	15 h 48	98	Strong coverage
August	23.9°C	14.4°C	32 mm	4.4	17.3°C	14 h 22	97	Strong coverage
September	20.2°C	11.6°C	53 mm	6.9	15.0°C	12 h 31	75	Strong coverage
October	14°C	7.5°C	140 mm	12.2	11.6°C	10 h 42	31	Strong coverage
November	9.2°C	4.3°C	216 mm	16.4	9.1°C	9 h 05	5	Strong coverage
December	6.2°C	2.3°C	235 mm	16.9	7.5°C	8 h 16	5	Strong coverage

Records at CHEMAINUS, 1979–2024
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	16.0°C6 Jan 2002	-11.0°C13 Jan 2024	99 mm31 Jan 2020	547 mm2020 · driest 73 mm in 2009	33
February	15.0°C27 Feb 1992	-6.0°C24 Feb 2023	68 mm23 Feb 1999	410 mm1999 · driest 21 mm in 2003	33
March	20.5°C29 Mar 2004	-5.0°C10 Mar 2009	86 mm17 Mar 1997	271 mm2016 · driest 12 mm in 2019	33
April	26.0°C20 Apr 2016	-0.5°C1 Apr 2008	44 mm3 Apr 2022	169 mm2022 · driest 10 mm in 1998	33
May	31.5°C14 May 2023	1.5°C5 May 2010	26 mm21 May 2004	98 mm2006 · driest 10 mm in 2018	32
June	39.5°C28 Jun 2021	4.0°C14 Jun 1979	53 mm11 Jun 2000	84 mm2020 · driest 3 mm in 2015	33
July	35.5°C28 Jul 2009	5.0°C3 Jul 1979	25 mm9 Jul 1995	51 mm1993 · driest 0 mm in 2021	33
August	36.0°C12 Aug 2021	9.0°C30 Aug 2008	56 mm29 Aug 1991	133 mm1991 · driest 2 mm in 2022	34
September	31.0°C3 Sep 2017	5.0°C28 Sep 1979	47 mm17 Sep 2021	169 mm2021 · driest 2 mm in 2012	34
October	24.5°C7 Oct 2022	-1.0°C29 Oct 1991	98 mm24 Oct 2023	362 mm2016 · driest 14 mm in 2002	34
November	19.0°C4 Nov 2020	-7.5°C23 Nov 2010	90 mm14 Nov 2021	482 mm2021 · driest 53 mm in 1979	34
December	18.0°C24 Dec 2005	-10.0°C20 Dec 2008	72 mm9 Dec 1993	387 mm1996 · driest 43 mm in 2013	33

Typical days per month at CHEMAINUS, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	8	8	3
February	0	0	6	5	2
March	0	0	3	5	1
April	<1	0	<1	2	<1
May	2	0	0	1	0
June	4	<1	0	1	0
July	12	2	0	<1	0
August	12	1	0	1	0
September	3	<1	0	2	0
October	0	0	<1	5	0
November	0	0	2	8	1
December	0	0	7	8	3

How often, not how much — every day in CHEMAINUS’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%	52%	22%	68%	5.3–8.1°C
February	0%	42%	15%	56%	6.4–9.5°C
March	<1%	41%	13%	53%	9.5–12.1°C
April	5%	31%	6%	38%	12.4–15.1°C
May	32%	23%	4%	24%	15.8–20.5°C
June	55%	21%	3%	23%	19.5–23.2°C
July	83%	12%	2%	10%	22.6–26.3°C
August	84%	13%	2%	11%	22.9–25.3°C
September	50%	21%	5%	26%	18.6–21.7°C
October	5%	38%	14%	54%	13.1–15.7°C
November	0%	51%	22%	70%	7.8–10.5°C
December	0%	54%	25%	74%	4.2–7.6°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.

1993Each stripe is one year’s mean temperature against the 30-year average. Warmest: 2015. Coolest: 2011.2022

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5920668
NOAA station: CA001011500 · CHEMAINUS
Station distance: 2.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 48.92°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 24 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
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 CHEMAINUS is what differs

Saltair→Thetis Island→

Or put two places side by side: Chemainus vs Saltair

Best time to visitChemainus.

July

July

September

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Chemainus.

The whole year,
without the guesswork.

Nearby, measured,
and named.