Question 1

What is the sunniest time of year in Copenhagen?

Accepted Answer

The sunniest time of year in Copenhagen is late spring through summer, with August 2025 being the standout month at 332.7 hours of sunshine. Across the full 2025 calendar year, the city recorded 2,028 hours of sunshine, and the brightest stretch runs from April to August.

After August, the next sunniest months in 2025 were June with 272.9 hours and April with 249.6 hours of sunshine. Grouped by meteorological season, summer (June to August) delivered the most light at roughly 813 hours, comfortably ahead of spring (March to May) at about 688 hours. By contrast, Copenhagen's darkest stretch falls in midwinter: January 2025 saw just 35.5 hours of sunshine, followed by December at 52.7 hours.

The warmest of these sunny months were also pleasant for visitors. August 2025 averaged 16.8°C (62.2°F) with highs reaching 28.4°C (83.1°F), though it was not entirely dry, collecting 59.8 mm (2.4 in) of rain.

For trip planning, the takeaway is clear: if you want the brightest, most reliable daylight in Copenhagen, aim for the May-to-August window. Long Nordic summer days mean extended evening light for harbour walks, cycling, and outdoor dining, while a winter visit means embracing short, dim days and the city's famous indoor *hygge* culture instead.

Question 2

Which season is the wettest in Copenhagen?

Accepted Answer

Autumn is the wettest season in Copenhagen, with the city recording 274.1 mm (10.8 in) of rainfall during autumn 2025 (September 1 to November 30) — far more than any other season.

This autumn total accounted for roughly 40% of Copenhagen's entire 2025 rainfall of 677.2 mm (26.7 in). September was the single wettest month of the year at 119.0 mm (4.7 in), followed closely by October with 100.3 mm (3.9 in). Rainfall then eased as winter approached, with November dropping to 54.8 mm (2.2 in).

By comparison, summer 2025 (June to August) was the second-wettest season at 215.5 mm (8.5 in), driven largely by frequent July showers. Spring 2025 (March to May) was the driest stretch by a wide margin, delivering just 72.9 mm (2.9 in), with April the standout dry month at only 9.0 mm (0.4 in).

For anyone planning a trip, this seasonal pattern makes a real difference in Copenhagen. The autumn months bring not just the heaviest rain but also rising humidity, which climbed to around 87–91% from October into November. If you want to explore the city's outdoor spots and harbour with the lowest chance of getting soaked, spring offers Copenhagen's driest and most settled conditions, while autumn travellers should pack a reliable rain jacket and waterproof shoes.

Question 3

What were the temperature extremes in Copenhagen in 2025?

Accepted Answer

Copenhagen swung between a peak high of 30.7°C (87.3°F) and a low of -10.4°C (13.3°F) in 2025, giving the Danish capital an annual temperature range of about 41.1°C (74°F) across the full calendar year.

The hottest conditions arrived in July 2025, which was both the warmest month overall (mean 18.2°C / 64.8°F) and the month that delivered the year's highest reading at 30.7°C (87.3°F). The coldest extreme came in February 2025, when the temperature dropped to -10.4°C (13.3°F); February was also the chilliest month by average at just 1.2°C (34.2°F). January wasn't far behind, bottoming out at -9.9°C (-14.2°F).

Across all of 2025, Copenhagen's annual mean temperature settled at 9.7°C (49.5°F), reflecting the city's mild, maritime northern-European climate. Key 2025 extremes at a glance:

- **Highest temperature:** 30.7°C (87.3°F) in July
- **Lowest temperature:** -10.4°C (13.3°F) in February
- **Annual average:** 9.7°C (49.5°F)

For visitors and residents, these figures show that Copenhagen rarely reaches uncomfortable heat, with even peak summer days topping out near 30°C (86°F). Winters can bring sharp sub-zero cold snaps, so warm layers are essential from December through February, while light clothing suits the brief but pleasant summer warmth in July and August.

Question 4

How windy is Copenhagen, and which months are the windiest?

Accepted Answer

Copenhagen is a consistently breezy coastal city, averaging **14.2 km/h (8.8 mph)** of wind across 2025 with no truly calm stretch during the year. Its position by the Øresund strait keeps a steady flow of maritime air moving over the city in every season.

In 2025, the windiest month in Copenhagen was June, with average wind speeds of **16.8 km/h (10.4 mph)**, closely followed by January at **16.6 km/h (10.3 mph)**. The calmest month was April, easing to **11.8 km/h (7.3 mph)**.

Seasonal averages stayed in a narrow band, showing just how stable the city's wind climate is:

- **Winter (December, January, February 2025):** 14.6 km/h (9.1 mph)
- **Autumn (September–November):** 14.4 km/h (9.0 mph)
- **Summer (June–August):** 14.2 km/h (8.8 mph)
- **Spring (March–May):** 13.7 km/h (8.5 mph)

Seven of the twelve months in 2025 sat above the annual average, confirming that brisk conditions are the norm rather than the exception in Copenhagen.

For visitors, this means a light windbreaker is useful year-round, especially along the harbour and waterfront. The steady breeze also helps explain why cycling and sailing are so popular here, and why the wider region is a hub for wind energy. Wind speeds rarely spike to extremes, so outdoor plans in Copenhagen are seldom disrupted, but the constant coastal air can make temperatures feel a few degrees cooler than the thermometer suggests.

Question 5

What is the weather like in Copenhagen in December?

Accepted Answer

Copenhagen in December is cold, damp, and grey, with mild Atlantic spells broken by short cold snaps. In December 2025 the city averaged **4.8°C (40.7°F)**, making it a typical early-winter month rather than a deep-freeze.

Daytime highs in Copenhagen averaged **6.3°C (43.3°F)**, while nights cooled to an average low of **3.0°C (37.5°F)**. The month swung between two extremes: the mildest day reached **10.8°C (51.4°F)** on 10 December, and the coldest night dropped to **-4.9°C (23.2°F)** on 30 December. Frost was occasional rather than constant, with **8 days** seeing sub-zero lows, mostly clustered around the Christmas period.

December was wet and overcast, as expected for Copenhagen this time of year:

- **25.6 mm (1.01 in)** of total precipitation
- **18 days** with measurable rainfall
- **88.4%** average humidity
- **14.4 km/h (8.9 mph)** average wind speed

With daylight at its shortest and skies frequently cloudy, December in Copenhagen suits city breaks built around indoor attractions, museums, and the cosy *hygge* of cafés and Christmas markets rather than long outdoor excursions. Pack a warm, waterproof coat and layers: temperatures hover near freezing on the coldest days but rarely turn bitter, and the persistent damp makes the air feel colder than the thermometer suggests.

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FAQ

What is the sunniest time of year in Copenhagen?

Which season is the wettest in Copenhagen?

What were the temperature extremes in Copenhagen in 2025?

How windy is Copenhagen, and which months are the windiest?

What is the weather like in Copenhagen in December?