Germany · 1991–2020

Best time to visit
Altona.

July leads for comfortable weather in Altona: typically 23.5°C by day, 13.9°C at night, with 80 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high23.5°C

Typical low13.9°C

Rain in July80 mm

Comfort

July

July · August · June

83climate match

Beach

July

July · August · June

48climate match

Outdoors

September

September · May · June

85climate match

The weakest month is January, scoring 5 against July’s 83 — days reach only 4.4°C, 20° 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

54.4° / -0.1°

Feb

55.4° / 0°

Mar

179.1° / 1.6°

Apr

4514.4° / 4.8°

May

6118.5° / 8.4°

Jun

7321.3° / 11.6°

Jul

8323.5° / 13.9°

Aug

8323.3° / 13.7°

Sep

6719.1° / 10.6°

Oct

4213.8° / 6.7°

Nov

178.4° / 3.4°

Dec

55.2° / 0.9°

Monthly climate evidence for Altona — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.4°C	-0.1°C	67 mm	12.6	7 h 59	5	Strong coverage
February	5.4°C	0°C	54 mm	10.6	9 h 42	5	Strong coverage
March	9.1°C	1.6°C	57 mm	10.4	11 h 40	17	Strong coverage
April	14.4°C	4.8°C	39 mm	8.1	13 h 54	45	Strong coverage
May	18.5°C	8.4°C	57 mm	9.6	15 h 52	61	Strong coverage
June	21.3°C	11.6°C	72 mm	10.7	17 h 00	73	Strong coverage
July	23.5°C	13.9°C	80 mm	10.9	16 h 33	83	Strong coverage
August	23.3°C	13.7°C	76 mm	10.7	14 h 48	83	Strong coverage
September	19.1°C	10.6°C	58 mm	9.4	12 h 36	67	Strong coverage
October	13.8°C	6.7°C	59 mm	10.4	10 h 27	42	Strong coverage
November	8.4°C	3.4°C	57 mm	11	8 h 30	17	Strong coverage
December	5.2°C	0.9°C	69 mm	12.1	7 h 29	5	Strong coverage

What has changed

Altona runs +2.2°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

+2.6

Mar

+2.8

Apr

+2.7

May

+1.6

Jun

+2.3

Jul

+2.2

Aug

+2.1

Sep

+2.3

Oct

+1.7

Nov

+1.3

Dec

+2.5

July daytime highs, 2011–2025. Last recorded: 23.5°C.

Records at HAMBURG-NEUWIEDENTHAL, 1962–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	16.2°C1 Jan 2023	-20.3°C1 Jan 1979	34 mm2 Jan 1967	144 mm1976 · driest 1 mm in 1996	64
February	21.1°C22 Feb 2021	-19.4°C18 Feb 1966	39 mm5 Feb 2011	161 mm2022 · driest 6 mm in 2025	64
March	24.3°C31 Mar 2021	-15.3°C13 Mar 2006	28 mm30 Mar 2010	133 mm1981 · driest 9 mm in 1996	64
April	30.0°C21 Apr 1968	-6.3°C12 Apr 1986	28 mm28 Apr 1992	109 mm1970 · driest 2 mm in 2007	64
May	34.0°C28 May 2005	-3.0°C4 May 1967	40 mm21 May 2013	157 mm2013 · driest 4 mm in 2018	65
June	39.4°C27 Jun 2026	1.5°C2 Jun 1975	57 mm27 Jun 1997	150 mm2007 · driest 12 mm in 1992	65
July	40.1°C20 Jul 2022	4.6°C19 Jul 1971	47 mm29 Jul 2005	176 mm2005 · driest 16 mm in 1983	64
August	37.0°C9 Aug 1992	2.4°C22 Aug 1964	83 mm27 Aug 1989	151 mm2006 · driest 6 mm in 1983	64
September	32.1°C13 Sep 2016	0.5°C17 Sep 1971	60 mm28 Sep 1976	202 mm2001 · driest 11 mm in 1969	64
October	27.9°C13 Oct 2018	-6.5°C28 Oct 1997	36 mm5 Oct 2017	167 mm2023 · driest 8 mm in 1985	64
November	20.6°C1 Nov 2014	-15.7°C23 Nov 1965	33 mm15 Nov 2015	134 mm1977 · driest 6 mm in 2011	64
December	16.0°C31 Dec 2022	-18.4°C21 Dec 1981	32 mm23 Dec 2020	159 mm2011 · driest 9 mm in 1972	64

Typical days per month at HAMBURG-NEUWIEDENTHAL, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	14	2
February	0	0	13	1
March	0	0	10	1
April	<1	0	3	<1
May	3	<1	<1	1
June	6	1	0	2
July	11	3	0	2
August	10	2	0	2
September	3	<1	0	2
October	<1	0	2	2
November	0	0	7	1
December	0	0	12	2

The best month has moved. On the 1961–1990 numbers the strongest month here was July (scoring 83); on 2011–2025 it is August (93). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in HAMBURG-NEUWIEDENTHAL’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%	39%	4%	52%	-0.7–7.0°C
February	<1%	34%	3%	43%	1.2–8.7°C
March	<1%	34%	4%	46%	4.9–11.7°C
April	9%	30%	3%	37%	10.9–16.3°C
May	26%	33%	5%	39%	15.7–20.0°C
June	42%	35%	7%	48%	18.9–23.6°C
July	49%	37%	7%	47%	19.8–25.4°C
August	53%	35%	7%	45%	20.6–25.2°C
September	26%	33%	6%	44%	16.4–21.4°C
October	4%	34%	5%	45%	11.6–16.0°C
November	<1%	38%	4%	50%	6.6–10.3°C
December	0%	39%	5%	54%	1.1–7.4°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.

1963Each stripe is one year’s mean temperature against the 63-year average. Warmest: 2024. Coolest: 1963.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2911296
NOAA station: GME00123274 · HAMBURG-NEUWIEDENTHAL
Station distance: 8.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 53.55°, 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 HAMBURG-NEUWIEDENTHAL is what differs

Harburg→Wilhelmsburg→Ottensen→Neugraben-Fischbek→Altona-Altstadt→Eißendorf→

Or put two places side by side: Altona vs Harburg

Best time to visitAltona.

July

July

September

The whole year,without the guesswork.

Altona runs +2.2°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Altona.

The whole year,
without the guesswork.

Altona runs +2.2°C
on the 1961–1990 baseline.

Nearby, measured,
and named.