Heide weather in September

In September, Heide sees average daytime highs of 18°C and overnight lows near 11°C, with 71 mm of rain across 12.5 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 16°C by the end. The sky is clear or mostly clear about 17% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Heide's 6th-clearest and 8th-windiest month. For the whole year in context, see Heide's year-round climate.

Daytime high
18°
4th warmest
Overnight low
11°
9th coldest
Rainfall
71 mm
12.5 wet days
Daylight
12 h 24 min
6:05 AM – 6:31 PM
Cloud cover
67%
6th clearest
Wind
15 km/h
8th windiest
Solar energy
2.85 kWh/m²
Travel score
5.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 19°C in the first days to 16°C by the end.

A typical September day in Heide reaches about 18°C in the afternoon and slips back to 11°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 22°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11912
21912
31912
41912
51912
61912
71912
81912
91812
101811
111811
121811
131811
141811
151811
161811
171711
181711
191710
201710
211710
221710
231710
241610
251610
261610
271610
28169
29169
30159

How September really feels in Heide

Once humidity and wind are folded in, September 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

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

Heide weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6913.22.47.70.0
Feb / 5210.52.49.30.0
Mar / 5311.31.711.51.0
Apr12° / 4510.10.213.73.1
May16° / 5711.6015.74.8
Jun19° / 11°7212.2016.85.6
Jul21° / 13°8013016.46.0
Aug21° / 13°8413.8014.65.9
Sep18° / 11°7112.5012.55.1
Oct13° / 7413.8010.23.2
Nov / 63130.48.21.2
Dec / 6813.12.27.20.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13961
23862
33961
43862
53862
63862
73763
83763
93664
103664
113664
123565
133565
143565
153664
163664
173664
183664
193565
203466
213466
223466
233466
243268
253268
263268
273169
283169
293169
303169

Chance of precipitation in September

Any precipitation

Heide gets around 71 mm of rain over 12.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 43% and peaks near 46% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
146
245
345
445
544
644
744
844
944
1043
1143
1243
1342
1442
1542
1641
1741
1841
1941
2040
2140
2240
2341
2441
2541
2642
2743
2843
2944
3044

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 76% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1613261
2613261
3633250
4643240
5653140
6653140
7673030
8673030
9682930
10692830
11702730
12722530
13742420
14752320
15772120
16782020
17801820
18821710
19831610
20831610
21841510
22841510
23851500
24861400
25861400
26861400
27871300
28871300
29871300
30881200

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 30 min at the start of September to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 126 minutes over September. Sunrise moves from 5:37 AM to 6:31 AM, and sunset from 7:09 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:377:09
213.55:397:07
313.45:417:04
413.35:437:02
513.25:456:59
613.25:476:57
713.15:486:54
813.05:506:52
912.95:526:49
1012.95:546:46
1112.85:566:44
1212.75:586:41
1312.75:596:39
1412.66:016:36
1512.56:036:33
1612.46:056:31
1712.46:076:28
1812.36:096:26
1912.26:116:23
2012.16:136:20
2112.16:146:18
2212.06:166:15
2311.96:186:13
2411.86:206:10
2511.86:226:07
2611.76:246:05
2711.66:266:02
2811.56:286:00
2911.56:295:57
3011.46:315:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.85 kWh/m².

For context, solar energy here swings from a low near 0.43 kWh/m² to a high of 5.47 kWh/m² in June across the year — September's 2.85 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.4Moderate
43.4Moderate
53.3Moderate
63.3Moderate
73.2Moderate
83.2Moderate
93.1Moderate
103.1Moderate
113.0Moderate
123.0Moderate
133.0Moderate
142.9Moderate
152.9Moderate
162.8Moderate
172.8Moderate
182.7Moderate
192.7Moderate
202.6Moderate
212.6Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.4Moderate
262.4Moderate
272.3Moderate
282.3Moderate
292.2Moderate
302.2Moderate
Planning a trip in September

Is September a good time to visit Heide?

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

5.1
Sightseeing
4th-best month of the year
1.5
Beach & pool
4th-best month of the year

September is a reasonable time to visit Heide for sightseeing.

What to pack for Heide in September

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

In September, Heide sees daytime highs around 18°C and nights near 11°C. Worth packing: rain gear. About 13 days see rain.

rain gear

Sea temperature near Heide in September

The nearest coast averages about 16°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 km away) is warmest in August at about 19°C and coldest in February near 3°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
Feb3Bracing
Mar5Bracing
Apr8Bracing
May13Bracing
Jun16Cool
Jul18Cool
Aug19Cool
Sep16Cool
Oct13Bracing
Nov9Bracing
Dec5Bracing

UV index in Heide in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Heide peaks around July 20 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 21 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 20UV 5Dec 21UV 0
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr3Moderate
May5High
Jun5Moderate
Jul6High
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Heide?

Heide sits at 54.2°N, 9.1°E, 14 m above sea level, in Germany. The nearest listed city is Husum, 32 km away.

SchleswigEckernfördeNeumünsterElmshorn

Topography around Heide

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

Within 3 km, the terrain around Heide has only modest variations in elevation — a maximum elevation change of 35 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 98 m; within 80 km, only modest variations in elevation — a maximum elevation change of 218 m.

The land around Heide is covered by grassland (48%) and trees (24%) within 3 km, grassland (44%) and cropland (36%) within 16 km, and water (33%), grassland (27%) and cropland (25%) within 80 km.

3 km
35 m
16 km
98 m
80 km
218 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Husum 32 km · Rendsburg 39 km · Itzehoe 41 km · Cuxhaven 45 km · Schleswig 47 km · Eckernförde 57 km · Neumünster 59 km · Elmshorn 62 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 Heide (54.1956°, 9.0974°, elevation 14 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).