Constanţa, Romania climate

Cfa Humid subtropical

Constanţa has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 82°F, while the coldest is January averaging around 30°F at night. Precipitation is fairly even year-round, totalling about 18 inches.

☀️ Summers

Warm

Highs near 82°F in August.

About 4 days a year above 90 °F

❄️ Winters

Cold

Lows near 30°F in January.

About 55 freezing nights a year

🌧️ Rain

Fairly dry

About 18 in of rain a year.

Wettest in May

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+1.9 °F vs 50 years ago

Temperature & precipitation

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

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Constanţa climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	40	44	50	59	69	78	82	82	74	64	53	44
Avg temp (°F)	35	38	44	52	62	71	75	75	67	58	48	38
Avg low (°F)	30	32	38	46	56	64	68	68	60	51	42	33
Precipitation (in)	1.4	1.1	1.5	1.3	1.8	1.6	1.7	1.4	1.7	1.7	1.6	1.6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	40	44	50	59	69	78
Avg temp (°F)	35	38	44	52	62	71
Avg low (°F)	30	32	38	46	56	64
Precipitation (in)	1.4	1.1	1.5	1.3	1.8	1.6

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	82	82	74	64	53	44
Avg temp (°F)	75	75	67	58	48	38
Avg low (°F)	68	68	60	51	42	33
Precipitation (in)	1.7	1.4	1.7	1.7	1.6	1.6

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	9	8	8	8	9	7	6	5	6	7	8	9
Days with high ≥ 90°F (days)	—	—	—	—	0.1	0.5	2	1	0.2	—	—	—
Days with low ≤ 32°F (days)	18	13	6	0.3	—	—	—	—	—	0.2	4	14

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	9	8	8	8	9	7
Days with high ≥ 90°F (days)	—	—	—	—	0.1	0.5
Days with low ≤ 32°F (days)	18	13	6	0.3	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	6	5	6	7	8	9
Days with high ≥ 90°F (days)	2	1	0.2	—	—	—
Days with low ≤ 32°F (days)	—	—	—	0.2	4	14

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	74	74	70	65	59	52	42	40	54	65	73	75
Clear days (≤ 30% cloud)	3	3	4	5	6	8	13	15	8	5	3	3
Partly cloudy days (30–70%)	8	7	9	10	12	13	12	11	12	11	9	8
Cloudy days (≥ 70%)	20	19	18	15	13	9	6	6	10	15	19	20
Relative humidity (%)	86	83	80	78	74	69	65	64	69	76	82	86
Wind speed (mph)	10.8	10.6	9.7	8.2	7.4	7.4	7.4	7.9	8.9	9.6	9.9	11.0

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	74	74	70	65	59	52
Clear days (≤ 30% cloud)	3	3	4	5	6	8
Partly cloudy days (30–70%)	8	7	9	10	12	13
Cloudy days (≥ 70%)	20	19	18	15	13	9
Relative humidity (%)	86	83	80	78	74	69
Wind speed (mph)	10.8	10.6	9.7	8.2	7.4	7.4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	42	40	54	65	73	75
Clear days (≤ 30% cloud)	13	15	8	5	3	3
Partly cloudy days (30–70%)	12	11	12	11	9	8
Cloudy days (≥ 70%)	6	6	10	15	19	20
Relative humidity (%)	65	64	69	76	82	86
Wind speed (mph)	7.4	7.9	8.9	9.6	9.9	11.0

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Constanta, a weather station, about 4 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 →