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Köln vs Reykjavík

Cfb Oceanic / temperateCfc Subpolar oceanic

Comparing Köln change · Reykjavík change

Bottom line

Köln is the warmer of the two — about 6°C on the annual average; Reykjavík is the wetter, with 530 mm more rain a year, and Köln the sunnier.

Warmer Köln 6°C on the year
Wetter Reykjavík 530 mm more a year
Sunnier Köln 8 pp less cloud
Colder winters Reykjavík 2°C colder nights

How the seasons compare

The differences between Köln and Reykjavík, in everyday terms.

Summers

Köln has far hotter summers

Köln: Mild
Reykjavík: Cool

Winters

Köln has milder winters

Köln: Chilly
Reykjavík: Cold

Rain & snow

Reykjavík is wetter

Köln: Moderate rainfall
Reykjavík: Wet

Sky

Köln is sunnier

Köln: Often grey
Reykjavík: Often grey

Month-by-month charts

Temperature

Köln is the warmer of the two — about 6°C on the annual average.

-10°10°20°30°40° JanAprJulOct KölnReykjavík

Precipitation

Reykjavík is the wetter — about 530 mm more across the year.

PRECIPITATION (mm) 075150 JanAprJulOct KölnReykjavík

Clear skies

Köln has the clearer skies — the higher line.

0%25%50%75%100% JanAprJulOct KölnReykjavík

Exact monthly numbers

Tap a metric to open its full table. Desktop shows all twelve months; on a phone each metric splits into Jan–Jun and Jul–Dec.

Avg high (°C) Köln runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Köln671116202325252015106
Reykjavík3346912141311754
Difference-3-4-8-10-10-10-11-11-9-8-5-3
Jan – JunJanFebMarAprMayJun
Köln6711162023
Reykjavík3346912
Difference-3-4-8-10-10-10
Jul – DecJulAugSepOctNovDec
Köln25252015106
Reykjavík141311754
Difference-11-11-9-8-5-3
Avg low (°C) Köln runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Köln0024811131310731
Reykjavík-1-2-214799630-1
Difference-2-2-4-3-4-5-5-4-3-4-3-2
Jan – JunJanFebMarAprMayJun
Köln0024811
Reykjavík-1-2-2147
Difference-2-2-4-3-4-5
Jul – DecJulAugSepOctNovDec
Köln131310731
Reykjavík99630-1
Difference-5-4-3-4-3-2
Precipitation (mm) Reykjavík runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Köln625455486286878367656469
Reykjavík13312710975935095135128114149123
Difference+71+73+54+27+31-36+8+51+61+50+86+54
Jan – JunJanFebMarAprMayJun
Köln625455486286
Reykjavík133127109759350
Difference+71+73+54+27+31-36
Jul – DecJulAugSepOctNovDec
Köln878367656469
Reykjavík95135128114149123
Difference+8+51+61+50+86+54
Snowfall (cm)
JanFebMarAprMayJunJulAugSepOctNovDec
Köln
Reykjavík284029121000012130
Difference
Jan – JunJanFebMarAprMayJun
Köln
Reykjavík2840291210
Difference
Jul – DecJulAugSepOctNovDec
Köln
Reykjavík00012130
Difference
Cloud cover (%) Reykjavík runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Köln757473707272706867727877
Reykjavík858282797679817979788284
Difference+10+8+9+9+4+7+12+12+12+5+4+7
Jan – JunJanFebMarAprMayJun
Köln757473707272
Reykjavík858282797679
Difference+10+8+9+9+4+7
Jul – DecJulAugSepOctNovDec
Köln706867727877
Reykjavík817979788284
Difference+12+12+12+5+4+7
Relative humidity (%) Varies through the year
JanFebMarAprMayJunJulAugSepOctNovDec
Köln928984797774706975849193
Reykjavík888786848383858686888888
Difference-5-2+2+6+6+9+15+16+11+4-4-6
Jan – JunJanFebMarAprMayJun
Köln928984797774
Reykjavík888786848383
Difference-5-2+2+6+6+9
Jul – DecJulAugSepOctNovDec
Köln706975849193
Reykjavík858686888888
Difference+15+16+11+4-4-6

How both climates are changing

Both cities are warming. Each city has its own warming trend; see its trends page for the year-by-year detail. Köln trends → · Reykjavík trends →

Reykjavík from Cfc to Cfb.

Methodology & sources

Köln

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Koln-bonn, a weather station, about 16 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

Reykjavík

Temperature & precipitation — 1991–2020 normals computed from 11 years of daily observations at Keflavik, a weather station, about 39 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →