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Denmark · 1991–2020

Best time to visit
Tønder.

July leads for comfortable weather in Tønder: typically 21.5°C by day, 12.1°C at night, with 82 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high21.5°C

Typical low12.1°C

Rain in July82 mm

Comfort

July

July · August · June

73climate match

Beach

July

July · August · June

36climate match

Outdoors

June

June · July · May

82climate match

The weakest month is January, scoring 5 against July’s 73 — days reach only 3.9°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

53.9° / -0.6°

Feb

54.3° / -0.8°

Mar

117.3° / 0.5°

Apr

3512.3° / 3.1°

May

5216.3° / 6.5°

Jun

6319° / 9.8°

Jul

7321.5° / 12.1°

Aug

7021.4° / 11.9°

Sep

5417.9° / 9.5°

Oct

3013° / 6.1°

Nov

108.1° / 2.8°

Dec

55° / 0.3°

Monthly climate evidence for Tønder — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 17 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	3.9°C	-0.6°C	69 mm	12.7	3.5°C	7 h 45	5	Strong coverage
February	4.3°C	-0.8°C	50 mm	10.2	2.7°C	9 h 34	5	Strong coverage
March	7.3°C	0.5°C	48 mm	9.9	4.0°C	11 h 38	11	Strong coverage
April	12.3°C	3.1°C	37 mm	8.2	7.0°C	14 h 00	35	Strong coverage
May	16.3°C	6.5°C	50 mm	8.7	11.2°C	16 h 05	52	Strong coverage
June	19°C	9.8°C	72 mm	10	14.9°C	17 h 19	63	Strong coverage
July	21.5°C	12.1°C	82 mm	11.1	17.5°C	16 h 49	73	Strong coverage
August	21.4°C	11.9°C	93 mm	11.8	18.6°C	14 h 57	70	Strong coverage
September	17.9°C	9.5°C	89 mm	11.9	16.1°C	12 h 38	54	Strong coverage
October	13°C	6.1°C	92 mm	13.6	12.3°C	10 h 22	30	Strong coverage
November	8.1°C	2.8°C	76 mm	13.3	8.6°C	8 h 18	10	Strong coverage
December	5°C	0.3°C	79 mm	13.4	5.4°C	7 h 13	5	Strong coverage

What has changed

Tønder runs +1.7°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

+2.4

Mar

+2.4

Apr

+2.4

May

+1.1

Jun

+1.5

Jul

+1.5

Aug

+1.4

Sep

+2.0

Oct

+1.1

Nov

+1.1

Dec

+1.8

July daytime highs, 2011–2025. Last recorded: 22.3°C.

Records at LECK, 1974–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	11.3°C24 Jan 2018	-20.4°C10 Jan 1986	27 mm19 Jan 1986	147 mm1995 · driest 2 mm in 1997	52
February	14.4°C22 Feb 2021	-22.2°C19 Feb 1978	26 mm18 Feb 2024	140 mm2022 · driest 2 mm in 1986	52
March	21.0°C31 Mar 2017	-14.8°C7 Mar 2010	23 mm3 Mar 1998	116 mm2019 · driest 8 mm in 2013	52
April	25.9°C26 Apr 2007	-7.4°C8 Apr 2003	25 mm30 Apr 2018	122 mm2024 · driest 3 mm in 2007	52
May	28.5°C28 May 2005	-3.5°C1 May 2013	36 mm30 May 2010	144 mm2021 · driest 6 mm in 2008	52
June	32.6°C18 Jun 2002	0.3°C6 Jun 1991	46 mm17 Jun 1977	129 mm2017 · driest 2 mm in 1992	52
July	33.9°C20 Jul 2022	3.9°C14 Jul 1993	66 mm13 Jul 2011	169 mm2023 · driest 16 mm in 1976	51
August	33.9°C10 Aug 1975	2.8°C31 Aug 1983	46 mm20 Aug 1981	218 mm2014 · driest 8 mm in 1983	51
September	29.5°C1 Sep 1983	-1.2°C30 Sep 1979	45 mm7 Sep 2011	190 mm1990 · driest 20 mm in 2002	51
October	25.1°C1 Oct 2011	-7.1°C28 Oct 1997	37 mm25 Oct 2005	220 mm1980 · driest 28 mm in 2007	51
November	16.8°C2 Nov 2020	-16.3°C30 Nov 1985	34 mm8 Nov 2002	173 mm1992 · driest 14 mm in 2011	52
December	12.3°C9 Dec 2025	-21.1°C20 Dec 1981	30 mm9 Dec 1983	180 mm1999 · driest 22 mm in 2002	52

Typical days per month at LECK, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	15	2
February	0	0	14	<1
March	0	0	13	<1
April	<1	0	6	<1
May	<1	0	1	1
June	3	<1	0	2
July	6	<1	0	3
August	5	<1	0	3
September	<1	0	0	3
October	0	0	3	3
November	0	0	8	2
December	0	0	13	2

The best month has moved. On the 1961–1990 numbers the strongest month here was July (scoring 76); on 2011–2025 it is August (79). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in LECK’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%	42%	5%	55%	0.1–6.4°C
February	0%	34%	3%	46%	1.1–7.5°C
March	<1%	33%	3%	43%	4.1–9.7°C
April	4%	29%	2%	34%	9.5–14.0°C
May	17%	29%	4%	34%	14.0–18.1°C
June	28%	34%	8%	46%	16.8–21.4°C
July	38%	36%	9%	49%	18.7–23.3°C
August	41%	38%	9%	52%	19.1–23.4°C
September	15%	41%	9%	56%	15.8–19.5°C
October	1%	44%	11%	58%	11.2–15.2°C
November	0%	47%	7%	63%	6.7–9.5°C
December	0%	45%	7%	61%	2.3–7.2°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.

1975Each stripe is one year’s mean temperature against the 51-year average. Warmest: 2024. Coolest: 1979.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2611497
NOAA station: GME00125146 · LECK
Station distance: 16.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 54.93°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 17 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 LECK is what differs

Niebüll→Leck→Risum-Lindholm→Løgumkloster→Toftlund→Langenhorn→

Or put two places side by side: Tønder vs Niebüll

Best time to visitTønder.

July

July

June

The whole year,without the guesswork.

Tønder runs +1.7°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Tønder.

The whole year,
without the guesswork.

Tønder runs +1.7°C
on the 1961–1990 baseline.

Nearby, measured,
and named.