Lillerød weather in September

In September, Lillerød sees average daytime highs of 16°C and overnight lows near 12°C, with 67 mm of rain across 11.3 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 21% 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 18 min by month's end. Set against the rest of the year, September is Lillerød's 6th-clearest and 7th-windiest month. For the whole year in context, see Lillerød's year-round climate.

Daytime high
16°
4th warmest
Overnight low
12°
9th coldest
Rainfall
67 mm
11.3 wet days
Daylight
12 h 30 min
5:51 AM – 6:19 PM
Cloud cover
65%
6th clearest
Wind
20 km/h
7th windiest
Solar energy
2.86 kWh/m²
Travel score
4.9
out of 10

Lillerød is human settlement.

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 Lillerød 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 20°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
81713
91713
101713
111712
121712
131712
141712
151712
161612
171612
181612
191611
201611
211611
221611
231511
241511
251511
261511
271511
281510
291410
301410

How September really feels in Lillerød

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.

Lillerød 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 / 5211.547.40.0
Feb / -0°43104.19.20.0
Mar / 429.52.311.40.3
Apr10° / 409.30.313.82.3
May15° / 5610.70164.3
Jun18° / 12°7411.7017.25.5
Jul20° / 15°7212016.76.1
Aug20° / 15°8213.2014.85.9
Sep16° / 12°6711.3012.54.9
Oct12° / 7012.9010.12.8
Nov / 57120.780.9
Dec / 5812.42.86.80.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% 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 59%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14456
24456
34456
44456
54456
64456
74555
84555
94555
104555
114456
124456
134357
144258
154258
164159
174159
184060
194060
203961
213961
223862
233862
243763
253763
263763
273763
283664
293664
303664

Chance of precipitation in September

Any precipitation

Lillerød gets around 67 mm of rain over 11.3 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 38% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
143
242
342
441
541
640
740
840
939
1039
1139
1238
1338
1438
1538
1637
1737
1837
1937
2036
2136
2236
2336
2437
2537
2637
2738
2838
2938
3038

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 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1613351
2613351
3643240
4653140
5673030
6682930
7702820
8712720
9722620
10732520
11752410
12762310
13772210
14782110
15792010
16801910
17811810
18831700
19841600
20851500
21861400
22871300
23871300
24881200
25881200
26891100
27891100
28901000
29901000
3091900

Wind in September

Winds average 20 km/h in September.

Across September, daily wind ranges from about 19 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
920light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1920light breeze
2020light breeze
2120light breeze
2220light breeze
2320light breeze
2420light breeze
2520light breeze
2620light breeze
2720breezy
2820breezy
2920breezy
3020breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 36 min at the start of September to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 138 minutes over September. Sunrise moves from 5:21 AM to 6:20 AM, and sunset from 6:59 PM to 5:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:216:59
213.65:236:57
313.55:256:54
413.45:276:51
513.35:296:49
613.25:316:46
713.25:336:43
813.15:356:41
913.05:376:38
1012.95:396:35
1112.95:416:32
1212.85:436:30
1312.75:456:27
1412.65:476:24
1512.55:496:21
1612.55:516:19
1712.45:536:16
1812.35:556:13
1912.25:576:10
2012.15:596:08
2112.16:016:05
2212.06:036:02
2311.96:055:59
2411.86:075:57
2511.76:095:54
2611.76:115:51
2711.66:135:48
2811.56:155:46
2911.46:185:43
3011.36:205:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.86 kWh/m².

For context, solar energy here swings from a low near 0.35 kWh/m² to a high of 5.72 kWh/m² in June across the year — September's 2.86 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.5Moderate
33.5Moderate
43.4Moderate
53.4Moderate
63.3Moderate
73.3Moderate
83.2Moderate
93.2Moderate
103.1Moderate
113.1Moderate
123.0Moderate
133.0Moderate
142.9Moderate
152.9Moderate
162.8Moderate
172.8Moderate
182.7Moderate
192.7Moderate
202.6Moderate
212.6Moderate
222.5Moderate
232.5Moderate
242.4Moderate
252.4Moderate
262.3Moderate
272.3Moderate
282.2Moderate
292.2Moderate
302.1Moderate
Planning a trip in September

Is September a good time to visit Lillerød?

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

4.9
Sightseeing
4th-best month of the year
0.9
Beach & pool
4th-best month of the year

September is a reasonable time to visit Lillerød for sightseeing.

What to pack for Lillerød in September

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

In September, Lillerød sees daytime highs around 16°C and nights near 12°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Lillerød in September

The nearest coast averages about 15°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 17 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
Apr6Bracing
May10Bracing
Jun14Bracing
Jul17Cool
Aug18Cool
Sep15Cool
Oct12Bracing
Nov8Bracing
Dec5Bracing

UV index in Lillerød in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lillerød peaks around July 12 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 12UV 5Dec 20UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5Moderate
Jun5High
Jul5High
Aug5Moderate
Sep3Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Lillerød?

Lillerød sits at 55.9°N, 12.3°E, 45 m above sea level, in Denmark. The nearest listed city is Allerød, 1.0 km away.

Topography around Lillerød

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

Within 3 km, the terrain around Lillerød has only modest variations in elevation — a maximum elevation change of 60 m around an average of 52 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 110 m; within 80 km, significant variations in elevation — a maximum elevation change of 289 m.

The land around Lillerød is covered by trees (48%) and grassland (22%) within 3 km, trees (36%) and grassland (26%) within 16 km, and water (45%) and cropland (23%) within 80 km.

3 km
60 m
16 km
110 m
80 km
289 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Allerød 1.0 km · Birkerød 6.0 km · Hillerød 7.0 km · Farum 7.0 km · Hørsholm 10 km · Stenløse 15 km · Ballerup 16 km · Frederikssund 18 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 Lillerød (55.875°, 12.3458°, elevation 45 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).