Køge weather in September

In September, Køge sees average daytime highs of 16°C and overnight lows near 12°C, with 61 mm of rain across 10.3 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 18°C in the first days to 15°C by the end. The sky is clear or mostly clear about 19% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Køge's 6th-clearest and 7th-windiest month. For the whole year in context, see Køge's year-round climate.

Daytime high
16°
4th warmest
Overnight low
12°
9th coldest
Rainfall
61 mm
10.3 wet days
Daylight
12 h 24 min
5:52 AM – 6:19 PM
Cloud cover
65%
6th clearest
Wind
18 km/h
7th windiest
Solar energy
2.92 kWh/m²
Travel score
5.0
out of 10

Køge is town in Denmark.

Founded
1250

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 18°C in the first days to 15°C by the end.

A typical September day in Køge reaches about 16°C in the afternoon and slips back to 12°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 19°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)
11813
21813
31813
41813
51813
61813
71813
81813
91713
101712
111712
121712
131712
141712
151712
161612
171612
181612
191611
201611
211611
221611
231511
241511
251511
261511
271511
281510
291510
301410

How September really feels in Køge

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.

Køge 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 / 5311.847.50.0
Feb / -0°429.63.99.20.0
Mar / 439.72.311.40.3
Apr10° / 3990.413.82.1
May14° / 5210.2015.94.2
Jun18° / 12°6711.1017.15.5
Jul20° / 14°6811.4016.66.1
Aug20° / 15°7311.7014.86.1
Sep16° / 12°6110.3012.55.0
Oct12° / 6312.2010.12.9
Nov / 5511.40.981.0
Dec / 5711.92.66.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24258
34357
44357
54357
64357
74357
84357
94357
104258
114258
124258
134159
144159
154060
164159
173961
183961
193862
203763
213763
223763
233664
243664
253565
263565
273565
283565
293664
303664

Chance of precipitation in September

Any precipitation

Køge gets around 61 mm of rain over 10.3 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 35% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
238
338
437
537
637
737
836
936
1036
1135
1235
1335
1434
1534
1634
1734
1834
1933
2033
2133
2233
2334
2434
2534
2635
2736
2836
2937
3037

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 77% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1563671
2583561
3613450
4623440
5633340
6653230
7663130
8673030
9692920
10702820
11712720
12732610
13752410
14762310
15782110
16792010
17801910
18821800
19831700
20841600
21851500
22861400
23871300
24871300
25881200
26891100
27891100
28901000
29901000
3091900

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 17 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
117light breeze
217light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 36 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 132 minutes over September. Sunrise moves from 5:23 AM to 6:20 AM, and sunset from 6:59 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:236:59
213.55:256:57
313.55:276:54
413.45:296:51
513.35:316:49
613.25:326:46
713.15:346:43
813.15:366:41
913.05:386:38
1012.95:406:35
1112.85:426:33
1212.85:446:30
1312.75:466:27
1412.65:486:24
1512.55:506:22
1612.45:526:19
1712.45:546:16
1812.35:566:14
1912.25:586:11
2012.16:006:08
2112.16:026:06
2212.06:046:03
2311.96:066:00
2411.86:085:57
2511.76:105:55
2611.76:125:52
2711.66:145:49
2811.56:165:47
2911.46:185:44
3011.46:205:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.92 kWh/m².

For context, solar energy here swings from a low near 0.38 kWh/m² to a high of 5.76 kWh/m² in June across the year — September's 2.92 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.5Moderate
43.5Moderate
53.5Moderate
63.4Moderate
73.3Moderate
83.3Moderate
93.2Moderate
103.2Moderate
113.1Moderate
123.1Moderate
133.0Moderate
143.0Moderate
152.9Moderate
162.9Moderate
172.8Moderate
182.8Moderate
192.7Moderate
202.7Moderate
212.6Moderate
222.6Moderate
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 Køge?

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

5.0
Sightseeing
4th-best month of the year
1.0
Beach & pool
4th-best month of the year

September is a reasonable time to visit Køge for sightseeing.

What to pack for Køge in September

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

In September, Køge sees daytime highs around 16°C and nights near 12°C. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Køge 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 15 km away) is warmest in August at about 18°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°5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan3Bracing
Feb2Bracing
Mar3Bracing
Apr5Bracing
May10Bracing
Jun14Bracing
Jul17Cool
Aug18Cool
Sep16Cool
Oct12Bracing
Nov9Bracing
Dec5Bracing

UV index in Køge 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 Køge peaks around June 21 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 20 at about 0 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 21UV 5Dec 20UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5Moderate
Jun6High
Jul5High
Aug5Moderate
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Køge?

Køge sits at 55.5°N, 12.2°E, 4 m above sea level, in Denmark. The nearest listed city is Solrød Strand, 9.0 km away.

RingstedAlbertslund

Topography around Køge

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

Within 3 km, the terrain around Køge has only modest variations in elevation — a maximum elevation change of 49 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 92 m; within 80 km, only modest variations in elevation — a maximum elevation change of 211 m.

The land around Køge is covered by water (27%), artificial surfaces (22%) and grassland (21%) within 3 km, cropland (34%) and water (29%) within 16 km, and water (50%) and cropland (26%) within 80 km.

3 km
49 m
16 km
92 m
80 km
211 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Solrød Strand 9.0 km · Greve 16 km · Ishøj 21 km · Roskilde 21 km · Vallensbæk 22 km · Taastrup 23 km · Ringsted 25 km · Albertslund 25 km

Denmark travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E / F / K
230 V · 50 Hz
Prices
≈ 92% of US
price level, 2025
GDP per capita
$76,970
2025
Happiness
7.5 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
3.7
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 611
Religion
Evangelical Lutheran 71%other/none/unspecified 24%Muslim 4%

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 Køge (55.458°, 12.1821°, elevation 4 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).