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Sweden · 1991–2020

Best time to visit
Viken.

July leads for comfortable weather in Viken: typically 20.4°C by day, 10.7°C at night, with 93 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high20.4°C

Typical low10.7°C

Rain in July93 mm

Comfort

July

July · August · June

63climate match

Beach

July

July · August · June

25climate match

Outdoors

August

August · July · June

77climate match

The weakest month is January, scoring 5 against July’s 63 — days reach only -3.7°C, 28° 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

5-3.7° / -10.5°

Feb

5-4° / -11°

Mar

50.1° / -8°

Apr

55.9° / -3°

May

3312.3° / 2°

Jun

5517.6° / 7.5°

Jul

6320.4° / 10.7°

Aug

5818.4° / 9.5°

Sep

3412.6° / 4.7°

Oct

55.1° / -0.2°

Nov

5-0.5° / -5.3°

Dec

5-2.7° / -8.5°

Monthly climate evidence for Viken — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 25 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	-3.7°C	-10.5°C	48 mm	11.2	0.9°C	5 h 03	5	Good coverage
February	-4°C	-11°C	33 mm	9.4	0.2°C	8 h 17	5	Good coverage
March	0.1°C	-8°C	42 mm	9	0.2°C	11 h 26	5	Good coverage
April	5.9°C	-3°C	35 mm	6.6	0.7°C	15 h	5	Good coverage
May	12.3°C	2°C	38 mm	7.8	2.9°C	18 h 31	33	Good coverage
June	17.6°C	7.5°C	63 mm	9.9	8.1°C	21 h 33	55	Good coverage
July	20.4°C	10.7°C	93 mm	12.6	13.9°C	20 h 06	63	Good coverage
August	18.4°C	9.5°C	83 mm	10.9	15.0°C	16 h 31	58	Good coverage
September	12.6°C	4.7°C	62 mm	9.6	11.8°C	12 h 55	34	Good coverage
October	5.1°C	-0.2°C	62 mm	11.2	7.7°C	9 h 31	5	Good coverage
November	-0.5°C	-5.3°C	58 mm	13.1	4.7°C	6 h 07	5	Good coverage
December	-2.7°C	-8.5°C	47 mm	10.9	2.6°C	3 h 51	5	Good coverage

Records at VASTANTRASK, 1970–2008
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	10.5°C10 Jan 1971	-37.0°C28 Jan 1999	26 mm13 Jan 1984	88 mm1977 · driest 2 mm in 1996	38
February	9.3°C23 Feb 1990	-34.2°C15 Feb 1978	21 mm4 Feb 1999	96 mm1988 · driest 4 mm in 1983	38
March	13.9°C29 Mar 2007	-31.7°C7 Mar 1981	23 mm22 Mar 1986	81 mm1986 · driest 4 mm in 1974	38
April	19.1°C21 Apr 2003	-19.4°C9 Apr 1993	33 mm4 Apr 2000	110 mm1973 · driest 3 mm in 1987	38
May	28.2°C29 May 1988	-9.2°C1 May 1971	32 mm17 May 1983	84 mm1991 · driest 3 mm in 2002	38
June	29.7°C29 Jun 1988	-1.7°C17 Jun 1978	40 mm27 Jun 1973	115 mm1987 · driest 14 mm in 1986	38
July	31.8°C17 Jul 2003	2.5°C31 Jul 1976	52 mm25 Jul 1987	189 mm1998 · driest 10 mm in 1975	39
August	29.8°C7 Aug 2006	-1.3°C30 Aug 1972	55 mm15 Aug 2000	142 mm1986 · driest 10 mm in 1976	39
September	25.6°C3 Sep 1999	-6.7°C26 Sep 1973	37 mm7 Sep 2006	131 mm2004 · driest 10 mm in 1999	38
October	16.9°C9 Oct 1995	-18.5°C26 Oct 1992	33 mm7 Oct 1980	137 mm1984 · driest 20 mm in 2005	38
November	12.0°C9 Nov 1975	-26.3°C21 Nov 1971	29 mm24 Nov 1981	118 mm1992 · driest 7 mm in 1988	38
December	7.2°C18 Dec 1998	-31.4°C9 Dec 1973	27 mm15 Dec 1982	105 mm1981 · driest 8 mm in 1995	38

Typical days per month at VASTANTRASK, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)
January	0	30	<1
February	0	28	<1
March	0	29	<1
April	0	24	<1
May	<1	9	<1
June	2	<1	2
July	4	0	3
August	2	0	2
September	<1	3	2
October	0	15	2
November	0	26	1
December	0	29	<1

How often, not how much — every day in VASTANTRASK’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%	35%	2%	49%	-9.6–-1.5°C
February	0%	30%	2%	35%	-8.4–-0.4°C
March	0%	27%	2%	33%	-3.5–2.3°C
April	0%	23%	3%	26%	2.8–7.5°C
May	8%	25%	3%	31%	9.8–15.1°C
June	24%	30%	5%	39%	15.4–19.9°C
July	37%	36%	8%	46%	18.3–23.0°C
August	23%	34%	7%	43%	15.3–20.3°C
September	2%	35%	7%	45%	9.7–13.6°C
October	0%	35%	6%	48%	2.7–7.5°C
November	0%	42%	4%	53%	-3.1–1.7°C
December	0%	36%	2%	44%	-7.6–-0.2°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.

1971Each stripe is one year’s mean temperature against the 37-year average. Warmest: 2006. Coolest: 1985.2007

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 601972
NOAA station: SWE00140330 · VASTANTRASK
Station distance: 39 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 64.73°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 25 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 VASTANTRASK is what differs

Skellefteå→Forsbacka→Burträsk→Nyland→Ersmark→Medle→

Or put two places side by side: Viken vs Skellefteå

Best time to visitViken.

July

July

August

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Viken.

The whole year,
without the guesswork.

Nearby, measured,
and named.