Flensburg weather in May

In May, Flensburg sees average daytime highs of 16°C and overnight lows near 8°C, with 55 mm of rain across 10.6 wet days and about 15.8 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 14°C in the first days to 17°C by the end. The sky is clear or mostly clear about 24% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 54 min at the start of May to 16 h 36 min by month's end. Set against the rest of the year, May is Flensburg's 1st-clearest and 10th-windiest month. For the whole year in context, see Flensburg's year-round climate.

Daytime high
16°
5th warmest
Overnight low
8th coldest
Rainfall
55 mm
10.6 wet days
Daylight
15 h 48 min
4:24 AM – 8:13 PM
Cloud cover
61%
1st clearest
Wind
14 km/h
10th windiest
Solar energy
5.3 kWh/m²
Travel score
4.8
out of 10
Air quality
Moderate
PM2.5 11 µg/m³ · 2019

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 14°C in the first days to 17°C by the end.

A typical May day in Flensburg reaches about 16°C in the afternoon and slips back to 8°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 21°C. Set against its neighbours, May runs about 4°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1146
2146
3146
4146
5146
6156
7156
8157
9157
10157
11157
12157
13157
14157
15167
16168
17168
18168
19168
20168
21168
22168
23179
24179
25179
26179
27179
28179
29179
30189
311810

How May really feels in Flensburg

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Flensburg weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6412.72.77.60.0
Feb / -0°4910.43.39.30.0
Mar / 5010.7211.50.8
Apr11° / 439.60.313.72.9
May16° / 5510.6015.84.8
Jun19° / 11°6811.6016.95.7
Jul21° / 13°7412.3016.56.1
Aug21° / 13°7612.8014.76.0
Sep17° / 11°6311012.55.2
Oct12° / 6612.6010.23.1
Nov / 5711.90.68.21.1
Dec / 6312.62.67.10.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in May, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 20% of May, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34357
44456
54555
64555
74555
84654
94654
104555
114654
124654
134555
144555
154555
164555
174456
184357
194258
204357
214357
224357
234357
244357
254357
264258
274258
284258
294258
304357
314357

Chance of precipitation in May

Any precipitation

Flensburg gets around 55 mm of rain over 10.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 34% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
335
435
534
634
734
833
933
1033
1133
1233
1334
1434
1534
1634
1734
1834
1934
2034
2135
2235
2335
2435
2535
2635
2734
2834
2934
3034
3135

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
110000
210000
310000
410000
510000
69910
79910
89910
99910
109910
119820
129820
139820
149730
159730
169640
179640
189550
199550
209550
219460
229460
239370
249370
259280
269280
279181
289091
299091
3089101
3189101

Wind in May

Winds average 14 km/h in May.

Across May, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 54 min at the start of May to 16 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 102 minutes over May. Sunrise moves from 4:53 AM to 4:02 AM, and sunset from 7:45 PM to 8:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.94:537:45
214.94:517:47
315.04:497:49
415.14:477:51
515.14:457:53
615.24:437:55
715.34:417:57
815.34:397:59
915.44:378:01
1015.54:358:02
1115.54:338:04
1215.64:318:06
1315.64:298:08
1415.74:278:10
1515.84:258:12
1615.84:248:13
1715.94:228:15
1815.94:208:17
1916.04:198:18
2016.14:178:20
2116.14:158:22
2216.24:148:23
2316.24:128:25
2416.34:118:27
2516.34:108:28
2616.44:088:30
2716.44:078:31
2816.44:068:33
2916.54:058:34
3016.54:038:36
3116.64:028:37

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.3 kWh/m².

For context, solar energy here swings from a low near 0.41 kWh/m² to a high of 5.55 kWh/m² in June across the year — May's 5.3 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
25.0Bright
35.0Bright
45.0Bright
55.1Bright
65.1Bright
75.1Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.6Bright
Planning a trip in May

Is May a good time to visit Flensburg?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.8
Sightseeing
5th-best month of the year
0.6
Beach & pool
5th-best month of the year

May is a reasonable time to visit Flensburg for sightseeing.

What to pack for Flensburg in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Flensburg sees daytime highs around 16°C and nights near 8°C. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

Sea temperature near Flensburg in May

The nearest coast averages about 11°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 45 km away) is warmest in August at about 19°C and coldest in February near 2°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan3Bracing
Feb2Bracing
Mar3Bracing
Apr5Bracing
May11Bracing
Jun15Cool
Jul18Cool
Aug19Cool
Sep16Cool
Oct12Bracing
Nov9Bracing
Dec4Bracing

UV index in Flensburg in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Flensburg peaks around July 17 at about 5 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 17UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5High
Jun5High
Jul5High
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Flensburg?

Flensburg sits at 54.8°N, 9.4°E, 33 m above sea level, in Germany. The nearest listed city is Sønderborg, 26 km away.

HaderslevRendsburg

Topography around Flensburg

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Flensburg.

Within 3 km, the terrain around Flensburg has only modest variations in elevation — a maximum elevation change of 82 m around an average of 37 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 99 m; within 80 km, only modest variations in elevation — a maximum elevation change of 144 m.

The land around Flensburg is covered by trees (45%) and artificial surfaces (33%) within 3 km, cropland (39%), grassland (25%) and trees (22%) within 16 km, and water (35%), cropland (31%) and grassland (21%) within 80 km.

3 km
82 m
16 km
99 m
80 km
144 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Sønderborg 26 km · Aabenraa 29 km · Schleswig 31 km · Tønder 40 km · Husum 42 km · Eckernförde 44 km · Haderslev 51 km · Rendsburg 56 km

Germany travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 80% of US
price level, 2025
GDP per capita
$60,496
2025
Happiness
6.9 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.9
per 100k, 2023
Road deaths
3.8
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 615
Religion
none 44%Roman Catholic 25%Protestant 23%other 5%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Flensburg (54.788°, 9.4372°, elevation 33 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).