Finland · 1991–2020

Best time to visit
Aluemeri.

July leads for comfortable weather in Aluemeri: typically 19.8°C by day, 14.9°C at night, with 48 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high19.8°C

Typical low14.9°C

Rain in July48 mm

Comfort

July

July · August · June

81climate match

Beach

July

July · August · June

49climate match

Outdoors

July

July · June · August

84climate match

The weakest month is January, scoring 5 against July’s 81 — days reach only 0°C, 24° 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

50° / -4.1°

Feb

5-1.8° / -6.4°

Mar

50.8° / -3.9°

Apr

105.3° / 0.6°

May

3911.3° / 5.8°

Jun

6116.3° / 11.2°

Jul

8119.8° / 14.9°

Aug

7419.1° / 14.8°

Sep

5414.4° / 10.5°

Oct

228.9° / 5.5°

Nov

54.1° / 0.6°

Dec

51.6° / -2.3°

Monthly climate evidence for Aluemeri — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 14 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	0°C	-4.1°C	44 mm	11.1	2.0°C	6 h 39	5	Good coverage
February	-1.8°C	-6.4°C	29 mm	8.2	0.7°C	9 h 00	5	Good coverage
March	0.8°C	-3.9°C	29 mm	7.7	0.7°C	11 h 33	5	Good coverage
April	5.3°C	0.6°C	31 mm	6.1	2.2°C	14 h 26	10	Good coverage
May	11.3°C	5.8°C	32 mm	6.1	6.2°C	17 h 05	39	Good coverage
June	16.3°C	11.2°C	50 mm	7.9	11.4°C	18 h 48	61	Good coverage
July	19.8°C	14.9°C	48 mm	6.7	16.1°C	18 h 05	81	Good coverage
August	19.1°C	14.8°C	66 mm	8.7	17.2°C	15 h 38	74	Good coverage
September	14.4°C	10.5°C	47 mm	8	14.4°C	12 h 46	54	Good coverage
October	8.9°C	5.5°C	65 mm	10.2	10.3°C	9 h 59	22	Good coverage
November	4.1°C	0.6°C	59 mm	10.4	7.0°C	7 h 23	5	Good coverage
December	1.6°C	-2.3°C	45 mm	9.9	4.2°C	5 h 55	5	Good coverage

Records at HELSINKI ISOSAARI, 1984–2008
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	7.8°C10 Jan 2007	-27.7°C6 Jan 1987	38 mm31 Jan 2004	87 mm2007 · driest 4 mm in 1996	24
February	8.3°C19 Feb 1998	-25.4°C10 Feb 1985	22 mm8 Feb 1990	103 mm1990 · driest 4 mm in 1994	24
March	10.4°C26 Mar 2007	-19.5°C11 Mar 2006	18 mm2 Mar 2001	54 mm2004 · driest 3 mm in 2005	24
April	17.0°C28 Apr 1993	-10.6°C5 Apr 1996	24 mm16 Apr 1999	65 mm2001 · driest 4 mm in 2002	24
May	24.0°C30 May 1988	-0.6°C12 May 1995	31 mm14 May 1995	69 mm2003 · driest 5 mm in 2008	24
June	26.5°C28 Jun 1988	5.3°C1 Jun 1999	25 mm18 Jun 1996	101 mm1998 · driest 12 mm in 1988	24
July	28.0°C14 Jul 2003	6.4°C12 Jul 1986	70 mm24 Jul 1993	135 mm1993 · driest 3 mm in 1994	24
August	26.6°C7 Aug 1997	8.1°C27 Aug 1986	39 mm21 Aug 1989	150 mm1992 · driest 1 mm in 1996	24
September	21.5°C1 Sep 1991	-0.7°C28 Sep 1986	35 mm24 Sep 1987	112 mm1987 · driest 7 mm in 2002	24
October	16.1°C1 Oct 1999	-7.0°C31 Oct 1992	39 mm31 Oct 2006	174 mm2006 · driest 24 mm in 2002	24
November	10.6°C1 Nov 2001	-13.0°C22 Nov 1990	33 mm29 Nov 2005	134 mm2005 · driest 5 mm in 1993	24
December	9.0°C6 Dec 2006	-22.4°C31 Dec 2002	26 mm21 Dec 2003	94 mm1988 · driest 11 mm in 2002	24

Typical days per month at HELSINKI ISOSAARI, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)
January	0	24	<1
February	0	24	<1
March	0	24	<1
April	0	10	<1
May	0	<1	<1
June	0	0	2
July	1	0	1
August	<1	0	2
September	0	0	1
October	0	3	2
November	0	13	2
December	0	19	<1

How often, not how much — every day in HELSINKI ISOSAARI’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%	34%	2%	47%	-4.6–2.2°C
February	0%	31%	1%	41%	-7.0–2.1°C
March	0%	25%	<1%	32%	-1.6–2.7°C
April	0%	20%	2%	19%	3.2–6.9°C
May	2%	20%	3%	19%	9.7–12.9°C
June	13%	26%	4%	28%	14.3–18.4°C
July	37%	23%	5%	27%	17.2–22.1°C
August	25%	31%	7%	40%	16.4–21.0°C
September	1%	30%	4%	38%	12.2–15.5°C
October	0%	32%	5%	42%	6.6–11.2°C
November	0%	35%	4%	47%	1.4–6.3°C
December	0%	32%	2%	40%	-1.9–4.2°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.

1985Each stripe is one year’s mean temperature against the 23-year average. Warmest: 2000. Coolest: 1985.2007

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 11962458
NOAA station: FIE00142311 · HELSINKI ISOSAARI
Station distance: 11.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 60.00°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 14 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 HELSINKI ISOSAARI is what differs

Jollas→Kõrgemäe Raba→Villinki→Sandhamn→Ulkosaaret→

Or put two places side by side: Aluemeri vs Jollas

Best time to visitAluemeri.

July

July

July

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Aluemeri.

The whole year,
without the guesswork.

Nearby, measured,
and named.