Gdynia, Poland climate

Cfb Oceanic / temperate

Gdynia has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is August with an average daily high near 72°F, while the coldest is January averaging around 30°F at night. Around 24 inches of precipitation falls each year, peaking in July (3.5 inches) and easing off in February (1.2 inches). At latitude 55°N, day length swings from 7.0 hours in midwinter to 17.0 hours at midsummer.

☀️ Summers

Mild

Highs near 72°F in August.

❄️ Winters

Cold

Lows near 30°F in January.

🌧️ Rain

Moderate rainfall

About 24 in of rain a year.

Wettest in July

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Gdynia climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	36	37	42	52	61	67	72	72	64	54	45	39
Avg temp (°F)	33	33	37	44	53	60	65	65	58	49	41	36
Avg low (°F)	30	30	32	37	45	53	58	59	53	45	38	33
Precipitation (in)	1.5	1.2	1.3	1.3	1.9	2.1	3.5	2.7	2.4	2.2	2.0	1.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	36	37	42	52	61	67
Avg temp (°F)	33	33	37	44	53	60
Avg low (°F)	30	30	32	37	45	53
Precipitation (in)	1.5	1.2	1.3	1.3	1.9	2.1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	72	72	64	54	45	39
Avg temp (°F)	65	65	58	49	41	36
Avg low (°F)	58	59	53	45	38	33
Precipitation (in)	3.5	2.7	2.4	2.2	2.0	1.8

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	82	81	75	66	61	63	64	63	66	74	82	81
Relative humidity (%)	91	89	85	82	80	79	79	77	79	84	90	91
Wind speed (mph)	12.8	12.1	10.6	8.6	7.9	8.2	8.3	8.5	9.9	11.1	11.6	12.3

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	82	81	75	66	61	63
Relative humidity (%)	91	89	85	82	80	79
Wind speed (mph)	12.8	12.1	10.6	8.6	7.9	8.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	64	63	66	74	82	81
Relative humidity (%)	79	77	79	84	90	91
Wind speed (mph)	8.3	8.5	9.9	11.1	11.6	12.3

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Hel, a weather station, about 20 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 →