Denmark Copenhagen Weather in September — Climate Guide
September in Copenhagen is very-high
September is very-high for Copenhagen.
Best shoulder-season month. Daylight still good (13h), crowds dropping, prices moderating.
Travel score
Copenhagen September Weather Stats
Avg High
17°C
Avg Low
10°C
Rainy Days
10
55mm total
Sunshine
5h
Daily avg
Humidity
78%
moderate
UV Index
3
Moderate
Wind
9 km/h
Gusts 25
Sea Temp
16°C
swimming possible
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
16 μg/m³
PM10
28 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
17°C
Nighttime
10°C
Humidity and wind affect how the actual temperature feels.
Wind
9 km/h
Max gust 25 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- 17/10°C still comfortable
- Crowds dropping
- Cheaper than Jun-Aug
- Sea-temp 16°C swim-able
Cons
- Rain 10 days/month
- Sunset 19:30
- Korean Chuseok airfare spike
September Events & Festivals
- Korean Chuseok
- Tivoli Halloween prep (late month)
Copenhagen in September — Full Picture
Best shoulder-season month. Daylight still good (13h), crowds dropping, prices moderating.
What to Wear & What to Pack
Early autumn. Day 17°C tee + cardigan, evening cool.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
11°C
3.3°C
8.7/mo
Summer (Jun·Jul·Aug)
20.3°C
12.3°C
10.3/mo
Autumn (Sep·Oct·Nov)
Current12°C
6.3°C
11/mo
Winter (Dec·Jan·Feb)
3.3°C
-1.3°C
10/mo
Copenhagen Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 3° | -2° | 11d·50mm | 1h | 88% | 1 | Quiet | Low season | |
| 3° | -2° | 8d·30mm | 2h | 85% | 1 | Quiet | Low season | |
| 6° | 0° | 9d·35mm | 4h | 80% | 2 | Quiet | Shoulder | |
| 11° | 3° | 9d·35mm | 6h | 75% | 3 | Moderate | Shoulder | |
| May (Best) | 16° | 7° | 8d·40mm | 8h | 70% | 4 | Busy | Peak |
| June (Best) | 19° | 11° | 10d·50mm | 9h | 70% | 5 | Very busy | Peak |
| July (Best) | 21° | 13° | 10d·70mm | 8h | 70% | 5 | Very busy | Peak |
| August (Best) | 21° | 13° | 11d·75mm | 7h | 73% | 5 | Very busy | Peak |
| 17° | 10° | 10d·55mm | 5h | 78% | 3 | Busy | Peak | |
| 12° | 6° | 11d·60mm | 3h | 82% | 2 | Moderate | Shoulder | |
| 7° | 3° | 12d·65mm | 1h | 87% | 1 | Moderate | Shoulder | |
| December (Best) | 4° | 0° | 11d·55mm | 1h | 88% | 1 | Very busy | Peak |
View Other Months
Copenhagen September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Copenhagen?
Copenhagen in September is very-high. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Copenhagen in September?
Copenhagen September averages a high of 17°C and a low of 10°C.
Does it rain much in Copenhagen in September?
Copenhagen September averages 55mm of rainfall over about 10 rainy days.
What should I wear in Copenhagen in September?
Early autumn. Day 17°C tee + cardigan, evening cool.
What time are sunrise and sunset in Copenhagen in September?
Copenhagen September sunrise is 06:30 and sunset is 19:32, with 13h 1min of daylight.
What's the air quality like in Copenhagen in September?
Copenhagen September air quality (AQI) averages 45, rated Good. PM2.5 averages 16μg/m³.
What activities are recommended in Copenhagen in September?
In September, Copenhagen is great for Tivoli (Halloween late month), Nyhavn, Bike tours.
Is September peak season in Copenhagen?
Copenhagen September crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Copenhagen
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.