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Canada · 1991–2020

Best time to visit
Union Bay.

July leads for comfortable weather in Union Bay: typically 23.7°C by day, 12.1°C at night, with 24 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high23.7°C

Typical low12.1°C

Rain in July24 mm

Comfort

July

July · August · June

93climate match

Beach

July

July · August · June

58climate match

Outdoors

June

June · September · July

90climate match

The weakest month is January, scoring 5 against July’s 93 — days reach only 6.5°C, 17° below the 24°C the score treats as ideal, and 287 mm of rain falls.

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

56.5° / 0.6°

Feb

57.6° / 0.3°

Mar

510.2° / 1.6°

Apr

2813.5° / 3.7°

May

5918° / 7.1°

Jun

7420.6° / 9.9°

Jul

9323.7° / 12.1°

Aug

9223.7° / 12.1°

Sep

6920.2° / 9.2°

Oct

1813.7° / 5.2°

Nov

58.9° / 2.3°

Dec

56.2° / 0.8°

Monthly climate evidence for Union Bay — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 5 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	6.5°C	0.6°C	287 mm	17.4	7.3°C	8 h 34	5	Good coverage
February	7.6°C	0.3°C	170 mm	13.7	7.3°C	10 h 01	5	Good coverage
March	10.2°C	1.6°C	151 mm	15.3	7.9°C	11 h 43	5	Good coverage
April	13.5°C	3.7°C	97 mm	12.5	9.6°C	13 h 40	28	Good coverage
May	18°C	7.1°C	48 mm	8.8	12.7°C	15 h 20	59	Good coverage
June	20.6°C	9.9°C	44 mm	8.1	15.2°C	16 h 16	74	Good coverage
July	23.7°C	12.1°C	24 mm	4.5	16.7°C	15 h 54	93	Good coverage
August	23.7°C	12.1°C	39 mm	4.7	16.9°C	14 h 26	92	Good coverage
September	20.2°C	9.2°C	64 mm	7.1	14.6°C	12 h 32	69	Good coverage
October	13.7°C	5.2°C	179 mm	14	11.5°C	10 h 40	18	Good coverage
November	8.9°C	2.3°C	278 mm	16.9	9.4°C	9 h 00	5	Good coverage
December	6.2°C	0.8°C	285 mm	18.9	8.0°C	8 h 10	5	Good coverage

Records at MUD BAY, 1971–2021
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.0°C23 Jan 2005	-12.5°C6 Jan 1982	135 mm14 Jan 1973	591 mm1992 · driest 25 mm in 1985	43
February	15.0°C22 Feb 2021	-13.0°C3 Feb 1989	146 mm1 Feb 1991	496 mm1999 · driest 15 mm in 1993	44
March	20.5°C29 Mar 2004	-7.0°C3 Mar 1989	146 mm9 Mar 1974	390 mm1974 · driest 15 mm in 2019	43
April	25.0°C25 Apr 1971	-4.5°C4 Apr 1999	79 mm7 Apr 2003	203 mm2003 · driest 10 mm in 1973	45
May	32.5°C29 May 1983	-2.0°C10 May 1999	58 mm23 May 1973	161 mm1984 · driest 7 mm in 1992	44
June	33.0°C17 Jun 2018	2.2°C1 Jun 1976	35 mm11 Jun 2000	103 mm1980 · driest 8 mm in 1988	44
July	34.0°C23 Jul 2006	5.0°C11 Jul 1974	46 mm16 Jul 1974	81 mm1974 · driest 0 mm in 2013	44
August	36.0°C2 Aug 2017	4.5°C30 Aug 1999	74 mm29 Aug 1991	198 mm1991 · driest 0 mm in 1974	43
September	36.0°C3 Sep 2017	-0.6°C27 Sep 1972	66 mm20 Sep 1972	254 mm1997 · driest 2 mm in 1975	44
October	23.5°C3 Oct 1980	-5.5°C31 Oct 1984	122 mm21 Oct 2014	480 mm1975 · driest 21 mm in 2002	43
November	19.0°C15 Nov 2019	-14.0°C27 Nov 1985	120 mm14 Nov 1983	620 mm1975 · driest 71 mm in 1985	44
December	17.0°C24 Dec 2005	-13.0°C27 Dec 2021	135 mm8 Dec 2014	495 mm2018 · driest 38 mm in 2013	43

Typical days per month at MUD BAY, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	15	9	2
February	0	0	15	5	1
March	0	0	12	4	<1
April	0	0	5	3	0
May	2	0	<1	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	2	5	0
November	0	0	10	8	<1
December	0	0	15	8	1

How often, not how much — every day in MUD BAY’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%	55%	26%	73%	3.1–7.7°C
February	0%	50%	20%	67%	5.5–8.8°C
March	0%	47%	14%	65%	8.4–11.7°C
April	5%	38%	9%	48%	11.9–15.0°C
May	25%	30%	4%	34%	15.4–19.6°C
June	45%	27%	4%	29%	18.3–22.9°C
July	77%	15%	2%	12%	21.0–25.4°C
August	76%	16%	4%	17%	21.4–25.2°C
September	41%	26%	7%	31%	17.4–21.4°C
October	2%	43%	17%	62%	12.3–14.9°C
November	0%	58%	28%	79%	6.4–9.7°C
December	0%	57%	26%	77%	3.4–7.4°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.

1972Each stripe is one year’s mean temperature against the 39-year average. Warmest: 2018. Coolest: 1975.2019

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 6171951
NOAA station: CA001025240 · MUD BAY
Station distance: 14.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 49.58°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 5 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 MUD BAY is what differs

Denman Island Trust Area→Hornby Island→Denman Island→Fanny Bay→Mud Bay→Deep Bay→

Or put two places side by side: Union Bay vs Denman Island Trust Area

Best time to visitUnion Bay.

July

July

June

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Union Bay.

The whole year,
without the guesswork.

Nearby, measured,
and named.