Finland · 1991–2020

Best time to visit
Västervik.

July leads for comfortable weather in Västervik: typically 18.7°C by day, 13.4°C at night, with 55 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high18.7°C

Typical low13.4°C

Rain in July55 mm

Comfort

July

July · August · June

73climate match

Beach

July

July · August · June

40climate match

Outdoors

July

July · August · June

81climate match

The weakest month is January, scoring 5 against July’s 73 — days reach only -1.3°C, 25° 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

5-1.3° / -5.4°

Feb

5-2.4° / -6.9°

Mar

50.3° / -4.4°

Apr

54.2° / -0.4°

May

319.7° / 4.1°

Jun

5514.7° / 9.1°

Jul

7318.7° / 13.4°

Aug

7218.2° / 13.5°

Sep

5013.6° / 9.4°

Oct

177.6° / 4.4°

Nov

53.5° / 0.5°

Dec

51° / -2.5°

Monthly climate evidence for Västervik — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 10 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	-1.3°C	-5.4°C	38 mm	9.4	0.9°C	5 h 41	5	Good coverage
February	-2.4°C	-6.9°C	29 mm	7.3	0.0°C	8 h 33	5	Good coverage
March	0.3°C	-4.4°C	30 mm	7.3	0.0°C	11 h 29	5	Good coverage
April	4.2°C	-0.4°C	24 mm	5.6	1.3°C	14 h 47	5	Good coverage
May	9.7°C	4.1°C	31 mm	5.7	4.8°C	17 h 58	31	Good coverage
June	14.7°C	9.1°C	43 mm	6.2	9.6°C	20 h 18	55	Good coverage
July	18.7°C	13.4°C	55 mm	7.3	14.7°C	19 h 16	73	Good coverage
August	18.2°C	13.5°C	53 mm	7.4	16.0°C	16 h 11	72	Good coverage
September	13.6°C	9.4°C	47 mm	7.3	12.8°C	12 h 51	50	Good coverage
October	7.6°C	4.4°C	56 mm	10.3	8.5°C	9 h 41	17	Good coverage
November	3.5°C	0.5°C	54 mm	10.4	5.3°C	6 h 36	5	Good coverage
December	1°C	-2.5°C	47 mm	9.8	2.7°C	4 h 42	5	Good coverage

What has changed

Västervik runs +2.4°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+2.2

Feb

+3.3

Mar

+3.2

Apr

+2.3

May

+2.8

Jun

+2.0

Jul

+2.6

Aug

+2.5

Sep

+2.4

Oct

+1.1

Nov

+1.9

Dec

+2.6

July daytime highs, 2011–2025. Last recorded: 21.1°C.

Records at MUSTASAARI VALASSAARET, 1959–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	8.1°C18 Jan 2025	-27.8°C20 Jan 1986	19 mm16 Jan 1999	75 mm1990 · driest 4 mm in 1964	64
February	7.0°C14 Feb 2019	-28.7°C3 Feb 1966	17 mm2 Feb 1985	62 mm1999 · driest 1 mm in 1994	66
March	11.3°C29 Mar 2016	-28.2°C14 Mar 1966	20 mm23 Mar 1986	56 mm2008 · driest 1 mm in 1964	67
April	16.6°C27 Apr 2002	-18.7°C4 Apr 1970	24 mm4 Apr 2000	65 mm2000 · driest 1 mm in 1961	68
May	22.6°C25 May 2022	-5.0°C7 May 1966	24 mm2 May 1991	73 mm1982 · driest 4 mm in 1994	68
June	26.6°C28 Jun 2024	1.5°C7 Jun 1985	38 mm25 Jun 1981	99 mm1981 · driest 0 mm in 1982	68
July	31.4°C23 Jul 2014	6.4°C16 Jul 1977	60 mm21 Jul 2008	134 mm2008 · driest 2 mm in 1994	66
August	31.3°C4 Aug 2014	4.8°C28 Aug 1959	52 mm6 Aug 1967	143 mm1960 · driest 13 mm in 1994	67
September	24.5°C1 Sep 2019	0.5°C27 Sep 1966	44 mm4 Sep 1992	116 mm1963 · driest 11 mm in 2008	67
October	15.5°C4 Oct 2020	-8.0°C24 Oct 1992	26 mm11 Oct 1999	110 mm1980 · driest 13 mm in 2005	67
November	11.9°C2 Nov 2020	-15.6°C29 Nov 2002	24 mm29 Nov 1999	105 mm1996 · driest 10 mm in 1993	67
December	7.0°C7 Dec 2000	-25.9°C30 Dec 1978	24 mm19 Dec 1993	90 mm1993 · driest 11 mm in 2002	66

Typical days per month at MUSTASAARI VALASSAARET, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)
January	0	27	<1
February	0	24	<1
March	0	26	<1
April	0	16	<1
May	0	1	<1
June	<1	0	1
July	<1	0	2
August	<1	0	2
September	0	0	1
October	0	3	1
November	0	13	1
December	0	20	1

How often, not how much — every day in MUSTASAARI VALASSAARET’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%	30%	1%	39%	-6.6–0.4°C
February	0%	23%	<1%	24%	-7.8–0.8°C
March	0%	22%	1%	23%	-4.2–2.3°C
April	0%	19%	<1%	18%	1.4–5.8°C
May	<1%	19%	2%	18%	6.5–11.2°C
June	4%	20%	3%	19%	12.3–16.8°C
July	16%	23%	5%	28%	16.1–20.5°C
August	12%	25%	5%	31%	15.1–19.7°C
September	<1%	30%	4%	40%	11.0–15.1°C
October	0%	33%	3%	41%	5.4–9.3°C
November	0%	35%	3%	46%	0.7–5.3°C
December	0%	31%	2%	38%	-3.8–3.0°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.

1959Each stripe is one year’s mean temperature against the 61-year average. Warmest: 2020. Coolest: 1985.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 632191
NOAA station: FIE00144222 · MUSTASAARI VALASSAARET
Station distance: 40.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 63.15°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 10 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 MUSTASAARI VALASSAARET is what differs

Vaasa→Replot→Vistarna→Dragnäsbäck→Vaskiluoto→Vallgrund→

Or put two places side by side: Västervik vs Vaasa

Best time to visitVästervik.

July

July

July

The whole year,without the guesswork.

Västervik runs +2.4°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Västervik.

The whole year,
without the guesswork.

Västervik runs +2.4°C
on the 1961–1990 baseline.

Nearby, measured,
and named.