Finland · 1991–2020

Best time to visit
Hanko.

July leads for comfortable weather in Hanko: typically 20.3°C by day, 15°C at night, with 52 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high20.3°C

Typical low15°C

Rain in July52 mm

Comfort

July

July · August · June

82climate match

Beach

July

July · August · June

50climate match

Outdoors

July

July · June · August

84climate match

The weakest month is January, scoring 5 against July’s 82 — days reach only 0.6°C, 23° 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

50.6° / -3.3°

Feb

5-0.5° / -4.6°

Mar

51.7° / -2.7°

Apr

116° / 1.1°

May

4111.6° / 5.9°

Jun

6316.3° / 11.1°

Jul

8220.3° / 15°

Aug

7719.8° / 14.9°

Sep

5715.5° / 11.2°

Oct

259.8° / 6.2°

Nov

55.5° / 2.2°

Dec

52.8° / -0.8°

Monthly climate evidence for Hanko — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 6 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	0.6°C	-3.3°C	54 mm	11.3	2.8°C	6 h 42	5	Good coverage
February	-0.5°C	-4.6°C	42 mm	8.3	1.4°C	9 h 02	5	Good coverage
March	1.7°C	-2.7°C	36 mm	7.5	1.2°C	11 h 33	5	Good coverage
April	6°C	1.1°C	32 mm	7.6	2.5°C	14 h 25	11	Good coverage
May	11.6°C	5.9°C	28 mm	5.2	6.3°C	17 h 03	41	Good coverage
June	16.3°C	11.1°C	44 mm	7.3	11.3°C	18 h 44	63	Good coverage
July	20.3°C	15°C	52 mm	6.5	16.0°C	18 h 02	82	Good coverage
August	19.8°C	14.9°C	70 mm	8.1	17.2°C	15 h 36	77	Good coverage
September	15.5°C	11.2°C	57 mm	8.1	14.5°C	12 h 45	57	Good coverage
October	9.8°C	6.2°C	70 mm	11.3	10.8°C	10 h 00	25	Good coverage
November	5.5°C	2.2°C	68 mm	10.6	7.6°C	7 h 25	5	Good coverage
December	2.8°C	-0.8°C	65 mm	11.9	5.0°C	5 h 58	5	Good coverage

What has changed

Hanko runs +2.1°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

+1.9

Feb

+2.7

Mar

+2.7

Apr

+2.5

May

+2.3

Jun

+1.4

Jul

+2.0

Aug

+2.0

Sep

+2.5

Oct

+1.4

Nov

+1.8

Dec

+2.0

July daytime highs, 2011–2025. Last recorded: 21.4°C.

Records at HANKO RUSSARO, 1959–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	7.6°C10 Jan 2007	-33.6°C10 Jan 1987	27 mm31 Jan 2004	104 mm2005 · driest 3 mm in 1972	68
February	7.8°C28 Feb 2021	-30.6°C3 Feb 1966	26 mm16 Feb 2024	97 mm1990 · driest 3 mm in 1980	68
March	10.2°C27 Mar 2007	-21.2°C1 Mar 1960	21 mm22 Mar 1983	86 mm1994 · driest 2 mm in 2022	68
April	17.7°C22 Apr 2014	-13.6°C1 Apr 1963	38 mm2 Apr 2024	87 mm1977 · driest 4 mm in 1981	68
May	26.5°C15 May 2018	-2.6°C1 May 1978	49 mm4 May 1988	69 mm1977 · driest 2 mm in 2024	68
June	28.2°C27 Jun 2020	3.7°C10 Jun 1982	30 mm15 Jun 2026	91 mm1981 · driest 2 mm in 1970	68
July	30.5°C14 Jul 2003	8.2°C1 Jul 1965	47 mm6 Jul 1996	177 mm1996 · driest 1 mm in 1994	67
August	27.7°C2 Aug 2018	6.0°C26 Aug 1984	48 mm6 Aug 1967	166 mm2005 · driest 3 mm in 1996	67
September	22.9°C7 Sep 1968	1.0°C28 Sep 1986	48 mm3 Sep 2000	111 mm2001 · driest 13 mm in 2005	67
October	16.3°C2 Oct 2023	-6.7°C25 Oct 1968	41 mm3 Oct 2023	130 mm1974 · driest 16 mm in 1960	67
November	12.9°C3 Nov 2020	-15.0°C29 Nov 1980	37 mm20 Nov 2024	148 mm1996 · driest 5 mm in 1993	67
December	9.6°C6 Dec 1986	-27.3°C31 Dec 1978	35 mm21 Dec 2003	108 mm2004 · driest 6 mm in 1963	67

Typical days per month at HANKO RUSSARO, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)
January	0	21	1
February	0	22	<1
March	0	21	<1
April	0	8	<1
May	0	<1	<1
June	<1	0	1
July	2	0	2
August	<1	0	3
September	0	0	2
October	0	2	2
November	0	8	2
December	0	15	2

How often, not how much — every day in HANKO RUSSARO’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%	2%	38%	-4.0–2.8°C
February	0%	24%	2%	27%	-5.6–2.3°C
March	0%	21%	1%	24%	-1.7–3.8°C
April	0%	23%	2%	26%	3.1–7.4°C
May	2%	18%	2%	14%	8.9–12.9°C
June	15%	21%	3%	21%	14.4–18.3°C
July	31%	24%	5%	26%	17.4–22.2°C
August	27%	28%	7%	36%	17.1–20.9°C
September	2%	31%	5%	39%	12.4–16.6°C
October	0%	34%	5%	46%	7.8–11.8°C
November	0%	38%	5%	52%	2.8–7.3°C
December	0%	35%	3%	46%	-0.6–4.9°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 66-year average. Warmest: 2020. Coolest: 1987.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 659101
NOAA station: FIE00141925 · HANKO RUSSARO
Station distance: 6.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 16 usable years
Daylight: Calculated from latitude 59.83°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 6 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 HANKO RUSSARO is what differs

Vättlax→Täktom→Stubbnäs→Rosala→Östergård→Östanberg→

Or put two places side by side: Hanko vs Vättlax

Best time to visitHanko.

July

July

July

The whole year,without the guesswork.

Hanko runs +2.1°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Hanko.

The whole year,
without the guesswork.

Hanko runs +2.1°C
on the 1961–1990 baseline.

Nearby, measured,
and named.