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Canada · 1991–2020

Best time to visit
Extension.

July leads for comfortable weather in Extension: typically 24.5°C by day, 12.7°C at night, with 25 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high24.5°C

Typical low12.7°C

Rain in July25 mm

Comfort

July

July · August · June

93climate match

Beach

July

July · August · June

62climate match

Outdoors

September

September · June · May

91climate match

The weakest month is January, scoring 5 against July’s 93 — days reach only 6.8°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

56.8° / 0.1°

Feb

58.7° / 0.4°

Mar

1010.8° / 1.9°

Apr

3513.9° / 3.9°

May

5918° / 7.5°

Jun

7620.7° / 10.5°

Jul

9324.5° / 12.7°

Aug

9224.4° / 12.3°

Sep

7621.1° / 9.3°

Oct

3314.5° / 5.5°

Nov

59.4° / 1.8°

Dec

56.5° / 0.1°

Monthly climate evidence for Extension — 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	6.8°C	0.1°C	185 mm	16.6	6.9°C	8 h 38	5	Strong coverage
February	8.7°C	0.4°C	118 mm	12.8	7.0°C	10 h 03	5	Strong coverage
March	10.8°C	1.9°C	122 mm	14.8	7.9°C	11 h 43	10	Strong coverage
April	13.9°C	3.9°C	64 mm	11.8	9.8°C	13 h 38	35	Strong coverage
May	18°C	7.5°C	49 mm	9.3	12.8°C	15 h 16	59	Strong coverage
June	20.7°C	10.5°C	41 mm	8.2	15.2°C	16 h 11	76	Strong coverage
July	24.5°C	12.7°C	25 mm	4.4	17.1°C	15 h 49	93	Good coverage
August	24.4°C	12.3°C	30 mm	4.8	17.3°C	14 h 23	92	Strong coverage
September	21.1°C	9.3°C	41 mm	6.1	15.0°C	12 h 32	76	Good coverage
October	14.5°C	5.5°C	109 mm	12.6	11.6°C	10 h 41	33	Strong coverage
November	9.4°C	1.8°C	171 mm	16.7	9.1°C	9 h 03	5	Strong coverage
December	6.5°C	0.1°C	194 mm	17.3	7.5°C	8 h 14	5	Good coverage

Records at NANAIMO A, 1947–2016
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.6°C20 Jan 1968	-17.8°C31 Jan 1950	71 mm18 Jan 1968	365 mm2006 · driest 22 mm in 1985	69
February	18.3°C27 Feb 1968	-16.7°C4 Feb 1989	97 mm1 Feb 1991	364 mm1999 · driest 18 mm in 1993	69
March	21.7°C28 Mar 1994	-12.2°C10 Mar 1951	69 mm9 Mar 2016	284 mm2016 · driest 20 mm in 1965	69
April	27.0°C20 Apr 2016	-5.0°C2 Apr 1955	59 mm27 Apr 1962	116 mm1992 · driest 5 mm in 1973	70
May	34.3°C29 May 1983	-3.3°C1 May 1954	31 mm25 May 1984	146 mm1984 · driest 3 mm in 1947	70
June	34.6°C27 Jun 2015	0.6°C1 Jun 1976	33 mm8 Jun 2006	95 mm1980 · driest 2 mm in 2015	68
July	36.6°C29 Jul 2009	2.8°C3 Jul 1954	24 mm23 Jul 1949	66 mm1957 · driest 0 mm in 2013	68
August	36.7°C9 Aug 1960	3.3°C18 Aug 1973	76 mm29 Aug 1991	131 mm1991 · driest 0 mm in 1967	69
September	33.2°C3 Sep 1988	-1.1°C27 Sep 1972	47 mm29 Sep 1953	142 mm2013 · driest 0 mm in 2012	67
October	29.3°C1 Oct 1987	-6.7°C18 Oct 1949	92 mm21 Oct 1963	289 mm1975 · driest 7 mm in 1979	69
November	19.4°C2 Nov 1949	-16.1°C15 Nov 1955	84 mm2 Nov 1955	477 mm1983 · driest 31 mm in 1947	69
December	18.2°C24 Dec 2005	-20.0°C30 Dec 1968	74 mm17 Dec 1979	393 mm1979 · driest 25 mm in 2013	67

Typical days per month at NANAIMO A, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	14	6	3
February	0	0	13	5	2
March	0	0	9	4	1
April	<1	0	3	2	<1
May	2	<1	<1	1	<1
June	4	1	0	<1	0
July	13	3	0	<1	0
August	13	2	0	<1	0
September	5	<1	0	1	0
October	0	0	2	4	0
November	0	0	10	6	1
December	0	0	16	8	3

How often, not how much — every day in NANAIMO A’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%	53%	19%	70%	3.7–8.3°C
February	0%	46%	16%	62%	6.3–10.1°C
March	<1%	43%	13%	57%	8.9–12.2°C
April	6%	35%	5%	45%	12.3–15.2°C
May	27%	28%	4%	34%	15.9–20.3°C
June	49%	26%	3%	30%	18.6–23.6°C
July	78%	15%	2%	13%	21.7–26.3°C
August	78%	16%	2%	18%	21.9–26.2°C
September	50%	22%	4%	25%	18.8–22.7°C
October	7%	38%	11%	53%	13.5–16.1°C
November	0%	53%	20%	75%	7.8–10.7°C
December	0%	56%	22%	77%	4.1–7.9°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.

1948Each stripe is one year’s mean temperature against the 60-year average. Warmest: 2015. Coolest: 1955.2015

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5950739
NOAA station: CA001025370 · NANAIMO A
Station distance: 8.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 49.10°, 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 NANAIMO A is what differs

Ladysmith→Chase River→North Oyster/Yellow Point→Cassidy→Cinnabar Valley→South Wellington→

Or put two places side by side: Extension vs Ladysmith

Best time to visitExtension.

July

July

September

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Extension.

The whole year,
without the guesswork.

Nearby, measured,
and named.