Constanţa, Romania experiences average highs of 17°C (63°F) and lows of 10°C (50°F) throughout the year. The climate is relatively dry, with only 7 rainy days per month on average. Sunshine is abundant, averaging about 9 hours per day. Average highs have warmed by 0.8°C (1.4°F) across the available records.
Constanţa, Romania Weather & Climate 2026
Monthly climate averages for Constanţa, Romania. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Apr–Nov At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.5/10
Best: June, July, August, September
UV Index
4
Low
Temperature 17°C / 10°C
Feels Like 15°C / 8°C
Rainy Days 7
Rainfall 40 mm
Sunshine 9 h
Humidity 75%
Wind Speed 19 km/h
Dew Point 9°C
Snow Days 3 days
Frost Days 8 days
Hottest Month
28°C
August
Avg Low21°C
Rain4days
Coldest Month
0°C
January
Avg High6°C
Rain7days
Driest Month
4days
August
Avg High28°C
Avg Low21°C
Windiest Month
21 km/h
January (Gusts 36)
Sea Temperature
6°C – 25°C
Warmest water: August (
25.2°C
)
Worst Time to Visit
Consider avoiding January, February, December due to very cold temperatures.
Sun Position
Sunrise 05:23
Daylight 15.5h
Sunset 20:52
Live conditions—
Constanţa on the map · live conditions
Constanţa, Romania
- Continent
- Europe
- Country
- Romania
- City
- Constanţa
- Population
- 317.8K
- Coordinates
- 44.18°, 28.63°
Seasonal Breakdown
Spring
Mar–May
Avg High 15°C
Avg Low 8°C
Rain 8 days/mo
Summer
Jun–Aug
Avg High 27°C
Avg Low 20°C
Rain 6 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 18°C
Avg Low 12°C
Rain 6 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 7°C
Avg Low 1°C
Rain 6 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 6°C / 0°C . Feb: 8°C / 2°C . Mar: 11°C / 3°C . Apr: 15°C / 7°C . May: 20°C / 12°C . Jun: 25°C / 18°C . Jul: 28°C / 20°C . Aug: 28°C / 21°C . Sep: 24°C / 17°C . Oct: 18°C / 11°C . Nov: 12°C / 7°C . Dec: 8°C / 3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 42 mm. Feb: 31 mm. Mar: 32 mm. Apr: 37 mm. May: 47 mm. Jun: 60 mm. Jul: 43 mm. Aug: 21 mm. Sep: 31 mm. Oct: 43 mm. Nov: 52 mm. Dec: 38 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 80%. Feb: 78%. Mar: 76%. Apr: 74%. May: 75%. Jun: 73%. Jul: 68%. Aug: 66%. Sep: 68%. Oct: 75%. Nov: 81%. Dec: 82%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 21 km/h . Feb: 21 km/h . Mar: 20 km/h . Apr: 19 km/h . May: 18 km/h . Jun: 17 km/h . Jul: 17 km/h . Aug: 18 km/h . Sep: 19 km/h . Oct: 18 km/h . Nov: 19 km/h . Dec: 20 km/h .
Sunshine
Sunshine
Sunshine: Jan: 6h. Feb: 7h. Mar: 8h. Apr: 10h. May: 12h. Jun: 13h. Jul: 13h. Aug: 12h. Sep: 11h. Oct: 8h. Nov: 5h. Dec: 5h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 8°C . Feb: 6°C . Mar: 8°C . Apr: 11°C . May: 15°C . Jun: 21°C . Jul: 25°C . Aug: 25°C . Sep: 24°C . Oct: 19°C . Nov: 14°C . Dec: 10°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 4. Apr: UV 6. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 3. Nov: UV 2. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 5 days. Feb: 3 days. Mar: 2 days. Apr: 0 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 1 days. Dec: 2 days.
Climate Trends
Average highs have warmed by 0.8°C (1.4°F) across the available records. Average rainfall is trending drier by about 16 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 29°C | Aug · 28°C |
| Coldest month | Feb 2025 · -2°C | Jan · 0°C |
| Wettest month | Oct 2025 · 109 mm | Jun · 60 mm |
| Windiest month | Oct 2025 · 20 km/h | Jan · 21 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Good May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Good November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 6°C / 0°C | 2°C / -4°C | 7days (42 mm) Good | 5.5h Fair | 80% Humid | 1.9 Low | Poor | View Details |
| February | 8°C / 2°C | 4°C / -3°C | 5days (31 mm) Good | 6.6h Fair | 78% Humid | 2.8 Moderate | Poor | View Details |
| March | 11°C / 3°C | 7°C / 0°C | 7days (32 mm) Good | 8.2h Good | 76% Humid | 3.9 Moderate | Poor | View Details |
| April | 15°C / 7°C | 13°C / 4°C | 8days (37 mm) Wet | 10.2h Excellent | 74% Muggy | 5.5 High | Good | View Details |
| May | 20°C / 12°C | 19°C / 11°C | 9days (47 mm) Wet | 12.1h Excellent | 75% Muggy | 6.1 High | Good | View Details |
| June best | 25°C / 18°C | 27°C / 18°C | 8days (60 mm) Wet | 13h Excellent | 73% Muggy | 7.1 Very High | Excellent | View Details |
| July best | 28°C / 20°C | 30°C / 21°C | 6days (43 mm) Good | 13.4h Excellent | 68% Muggy | 7.1 Very High | Excellent | View Details |
| August best | 28°C / 21°C | 29°C / 21°C | 4days (21 mm) Good | 12.4h Excellent | 66% Muggy | 6.4 High | Excellent | View Details |
| September best | 24°C / 17°C | 23°C / 16°C | 4days (31 mm) Good | 10.5h Excellent | 68% Muggy | 5 Moderate | Excellent | View Details |
| October | 18°C / 11°C | 16°C / 9°C | 5days (43 mm) Good | 7.8h Good | 75% Muggy | 3.4 Moderate | Good | View Details |
| November | 12°C / 7°C | 10°C / 4°C | 8days (52 mm) Wet | 5.2h Fair | 81% Humid | 2.1 Moderate | Fair | View Details |
| December | 8°C / 3°C | 4°C / -1°C | 7days (38 mm) Good | 4.8h Fair | 82% Humid | 1.5 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Constanţa are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Constanţa, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Constanţa is August, with average daytime highs of 28°C (83°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Constanţa is January, with average overnight lows of 0°C (32°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Constanţa is June, averaging 60mm of precipitation across 8 rainy days. An umbrella or waterproof jacket is essential.
Constanţa receives approximately 110 sunshine hours per year. The sunniest month is July with around 13 hours. Based on climate data for Constanţa.
The least favorable months to visit Constanţa are January, February, December, primarily due to very cold temperatures. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Constanţa is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Constanţa is 75%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in July, August, September average 25°C (77°F), which is warm and comfortable for swimming and water activities.
Yes, Constanţa receives snow. Months with snowfall average 3 snow days and 6 cm (2 in) of accumulation, with about 8 frost days during winter.
Average wind speeds in Constanţa are 19 km/h (12 mph). The windiest month is January with peak winds reaching 21 km/h (13 mph) (gusts up to 36 km/h / 22 mph).
Constanţa averages 6 clear-sky days per month with overall cloud cover around 52%. The clearest skies occur in August.
The annual average dew point in Constanţa is 9°C (48°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Constanţa has a Humid Subtropical climate, classified as Cfa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Constanţa ranges from 8°C (46°F) to 15°C (59°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Constanţa. It earns a climate score of 8.9/10 with Excellent.
For June in Constanţa, pack Umbrella, Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses. With average highs of 25°C (77°F) and 8 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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