Canada · 1991–2020

Best time to visit
Altona.

August leads for comfortable weather in Altona: typically 25.8°C by day, 13°C at night, with 68 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high25.8°C

Typical low13°C

Rain in August68 mm

Comfort

August

August · July · June

82climate match

Beach

July

July · August · June

59climate match

Outdoors

September

September · May · August

88climate match

The weakest month is January, scoring 5 against August’s 82 — days reach only -10.6°C, 35° 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

5-10.6° / -20.2°

Feb

5-7° / -16.9°

Mar

5-0.3° / -9.6°

Apr

2610.6° / -0.9°

May

5218.5° / 5.8°

Jun

7723.7° / 12.4°

Jul

8126° / 14.5°

Aug

8225.8° / 13°

Sep

6920.1° / 7.7°

Oct

2610.9° / 0.4°

Nov

50.3° / -7.7°

Dec

5-6.6° / -14.9°

Monthly climate evidence for Altona — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-10.6°C	-20.2°C	27 mm	8.3	8 h 38	5	Good coverage
February	-7°C	-16.9°C	23 mm	7.2	10 h 03	5	Good coverage
March	-0.3°C	-9.6°C	29 mm	6.7	11 h 43	5	Good coverage
April	10.6°C	-0.9°C	29 mm	4.8	13 h 38	26	Good coverage
May	18.5°C	5.8°C	82 mm	10.5	15 h 16	52	Good coverage
June	23.7°C	12.4°C	111 mm	10.6	16 h 11	77	Good coverage
July	26°C	14.5°C	78 mm	9.2	15 h 49	81	Good coverage
August	25.8°C	13°C	68 mm	7.8	14 h 23	82	Good coverage
September	20.1°C	7.7°C	46 mm	7.5	12 h 32	69	Good coverage
October	10.9°C	0.4°C	43 mm	7.2	10 h 41	26	Good coverage
November	0.3°C	-7.7°C	33 mm	6.2	9 h 03	5	Good coverage
December	-6.6°C	-14.9°C	30 mm	8.3	8 h 14	5	Good coverage

Records at ALTONA, 1949–2008
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	8.0°C7 Jan 2003	-40.0°C28 Jan 1966	20 mm1 Jan 2005	64 mm1969 · driest 0 mm in 1952	49
February	14.0°C21 Feb 2000	-40.6°C18 Feb 1966	24 mm25 Feb 1998	41 mm1998 · driest 0 mm in 1952	49
March	22.2°C31 Mar 1963	-33.5°C1 Mar 1980	60 mm27 Mar 2004	95 mm2004 · driest 5 mm in 1978	49
April	35.6°C27 Apr 1952	-23.9°C2 Apr 1979	45 mm5 Apr 1997	108 mm1979 · driest 0 mm in 1987	59
May	36.7°C21 May 1964	-13.9°C3 May 1967	50 mm7 May 2005	151 mm2004 · driest 7 mm in 1958	60
June	38.0°C17 Jun 1995	-2.8°C1 Jun 1964	116 mm10 Jun 1970	276 mm2005 · driest 15 mm in 1978	60
July	38.9°C29 Jul 1975	2.8°C13 Jul 1950	101 mm11 Jul 1957	168 mm1993 · driest 19 mm in 1976	59
August	40.0°C1 Aug 1989	0.0°C28 Aug 1965	95 mm18 Aug 1995	202 mm1985 · driest 1 mm in 1961	59
September	39.0°C2 Sep 1983	-6.7°C26 Sep 1965	77 mm2 Sep 1957	127 mm1977 · driest 4 mm in 1976	59
October	33.5°C1 Oct 1992	-16.5°C31 Oct 1991	58 mm10 Oct 1949	126 mm1949 · driest 0 mm in 1963	57
November	25.0°C5 Nov 1975	-35.0°C28 Nov 1985	21 mm6 Nov 2000	87 mm2000 · driest 0 mm in 1976	51
December	14.4°C1 Dec 1969	-37.2°C31 Dec 1967	23 mm30 Dec 2006	56 mm2004 · driest 3 mm in 1997	48

Typical days per month at ALTONA, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	8
February	0	0	27	<1	7
March	0	0	29	<1	5
April	<1	0	18	1	2
May	5	1	5	3	<1
June	13	4	0	4	0
July	20	6	0	2	0
August	19	6	0	2	0
September	7	2	1	2	0
October	<1	<1	14	1	1
November	0	0	28	1	5
December	0	0	30	<1	9

How often, not how much — every day in ALTONA’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%	26%	1%	27%	-17.1–-6.3°C
February	0%	20%	1%	17%	-12.0–-2.5°C
March	<1%	19%	2%	18%	-4.7–3.3°C
April	12%	17%	4%	15%	5.2–14.5°C
May	35%	28%	7%	34%	15.0–22.0°C
June	56%	32%	9%	42%	21.3–26.1°C
July	69%	28%	7%	30%	24.3–28.3°C
August	70%	25%	6%	28%	22.9–28.6°C
September	40%	22%	5%	21%	17.2–22.4°C
October	12%	19%	4%	16%	9.3–14.0°C
November	<1%	18%	2%	16%	-3.5–4.1°C
December	0%	23%	2%	27%	-12.7–-3.5°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.

1950Each stripe is one year’s mean temperature against the 44-year average. Warmest: 1998. Coolest: 1950.2006

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5884260
NOAA station: CA005020040 · ALTONA
Station distance: 0.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 16 usable years
Daylight: Calculated from latitude 49.10°, 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 ALTONA is what differs

St. Jean Baptiste→Rosenfeld→

Or put two places side by side: Altona vs St. Jean Baptiste

Best time to visitAltona.