Isaccea climate — normals and trends
Isaccea (Romania) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.2 °C and it receives 507 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (23.0 °C on average) and the coldest is January (-1.4 °C). Rainfall peaks in June.
Isaccea averages 77 frost days, 20 hot days (≥ 30 °C) and 86 rainy days per year.
Isaccea has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 95 to 59 per year over the period.
The hottest day of the period reached 39.2 °C (on 23 July 2007) and the coldest -25.5 °C (on 24 January 1942).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
IsacceaTulcea County
- coords
- 45.27°, 28.47°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.2°C
Average daily high
15.1°C
Average daily low
7.8°C
Annual rainfall
507mm
Sunshine / day
8.8h
Mean relative humidity
75%
Average peak wind
16.7km/h
Seasonal range
24.4°C
Frost days (< 0 °C)
77 d/yr
Hot days (≥ 30 °C)
20 d/yr
Rainy days (≥ 1 mm)
86 d/yr
Annual snowfall
44.9 cm
Average feels-like high
13.3 °C
Average feels-like low
5.5 °C
Average peak gust
32.2 km/h
Tropical nights (≥ 20 °C)
20 d/yr
Solar radiation
13.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.35 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
39.2 °C
23 July 2007
Coldest day
-25.5 °C
24 January 1942
Wettest day
105 mm
30 June 2013
Windiest day
49.3 km/h
3 December 2012
Strongest gust
92.5 km/h
3 December 2012
Hottest feels-like
41.9 °C
5 July 2000
Coldest feels-like
-30.9 °C
24 January 1942
Snowiest day
25.3 cm
12 March 1973
Sunniest day
14.9 h
27 June 1947
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 7.9 °C | +6.6 °C | 14 mm | -20 mm |
| Feb | 2.5 °C | -0.9 °C | 9 mm | -23 mm |
| Mar | 14.4 °C | +6.0 °C | 27 mm | -8 mm |
| Apr | 16.1 °C | +0.8 °C | 18 mm | -28 mm |
| May | 19.7 °C | -1.3 °C | 70 mm | +11 mm |
| Jun | 28.2 °C | +3.0 °C | 3 mm | -62 mm |
| Jul | 31.3 °C | +3.8 °C | 37 mm | -11 mm |
| Aug | 30.0 °C | +2.6 °C | 6 mm | -34 mm |
| Sep | 24.3 °C | +1.5 °C | 40 mm | +3 mm |
| Oct | 15.4 °C | -0.7 °C | 87 mm | +52 mm |
| Nov | 12.7 °C | +3.5 °C | 78 mm | +39 mm |
| Dec | 5.4 °C | +1.8 °C | 5 mm | -33 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Isaccea?
Isaccea has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 11.2 °C and it receives 507 mm of precipitation per year.
What is the hottest day ever recorded in Isaccea?
The hottest day measured in Isaccea between 1940 and 2025 was 23 July 2007, reaching 39.2 °C.
What is the coldest day in Isaccea?
The coldest day measured in Isaccea between 1940 and 2025 was 24 January 1942, at -25.5 °C.
Does it snow in Isaccea?
Yes. Isaccea gets on average 44.9 cm of snow per year and has around 77 frost days.
Has the climate of Isaccea warmed?
Yes: Isaccea warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Isaccea?
The wettest day measured in Isaccea between 1940 and 2025 was 30 June 2013, with 105 mm of rain in 24 hours.
What was the windiest day in Isaccea?
The windiest day measured in Isaccea between 1940 and 2025 was 3 December 2012, with winds reaching 49.3 km/h.
What is the warmest month in Isaccea?
The warmest month in Isaccea is July (23.0 °C on average); the coldest is January (-1.4 °C).
How much does it rain in Isaccea?
Isaccea receives on average 507 mm of precipitation per year, spread over about 86 rainy days.
Is it sunny in Isaccea?
Isaccea gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Isaccea?
The heaviest 24-hour snowfall measured in Isaccea between 1940 and 2025 was 12 March 1973, with 25.3 cm.
Are there tropical nights in Isaccea?
Yes: Isaccea has on average 20 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Isaccea?
In Isaccea, between 1940 and 2025, the highest apparent temperature reached 41.9 °C on 5 July 2000, and the lowest was -30.9 °C on 24 January 1942.
Compare Isaccea with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Isaccea