Omiš climate — normals and trends
Omiš (Croatia) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 13.5 °C and it receives 1,247 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 (22.6 °C on average) and the coldest is January (4.5 °C). Rainfall peaks in November.
Omiš averages 20 frost days, 2 hot days (≥ 30 °C) and 120 rainy days per year.
Omiš has warmed by +2.4 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 35 to 5 per year over the period.
The hottest day of the period reached 33.4 °C (on 11 August 2025) and the coldest -17.1 °C (on 23 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
OmišSplit-Dalmatia County
- coords
- 43.44°, 16.69°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.5°C
Average daily high
16.1°C
Average daily low
10.9°C
Annual rainfall
1,247mm
Sunshine / day
9.7h
Mean relative humidity
73%
Average peak wind
14.6km/h
Seasonal range
18.1°C
Frost days (< 0 °C)
20 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
120 d/yr
Annual snowfall
34.0 cm
Average feels-like high
15.3 °C
Average feels-like low
9.2 °C
Average peak gust
34.2 km/h
Tropical nights (≥ 20 °C)
35 d/yr
Solar radiation
14.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.61 · 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
33.4 °C
11 August 2025
Coldest day
-17.1 °C
23 January 1942
Wettest day
110 mm
9 November 1962
Windiest day
50.5 km/h
14 November 2004
Strongest gust
118.4 km/h
14 November 2004
Hottest feels-like
36.9 °C
17 July 2024
Coldest feels-like
-23.4 °C
23 January 1942
Snowiest day
17.0 cm
15 March 1962
Sunniest day
14.4 h
23 June 2025
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 | 10.2 °C | +3.2 °C | 79 mm | -41 mm |
| Feb | 10.2 °C | +2.1 °C | 102 mm | -16 mm |
| Mar | 13.5 °C | +2.7 °C | 201 mm | +92 mm |
| Apr | 16.5 °C | +2.0 °C | 92 mm | -10 mm |
| May | 19.4 °C | +0.6 °C | 96 mm | +15 mm |
| Jun | 26.9 °C | +4.2 °C | 8 mm | -46 mm |
| Jul | 27.2 °C | +1.9 °C | 41 mm | +12 mm |
| Aug | 26.9 °C | +1.4 °C | 90 mm | +45 mm |
| Sep | 24.0 °C | +2.1 °C | 82 mm | -5 mm |
| Oct | 16.9 °C | -0.5 °C | 85 mm | -50 mm |
| Nov | 13.7 °C | +1.3 °C | 205 mm | +3 mm |
| Dec | 11.3 °C | +2.8 °C | 67 mm | -97 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 Omiš?
Omiš has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 13.5 °C and it receives 1,247 mm of precipitation per year.
What is the hottest day ever recorded in Omiš?
The hottest day measured in Omiš between 1940 and 2025 was 11 August 2025, reaching 33.4 °C.
What is the coldest day in Omiš?
The coldest day measured in Omiš between 1940 and 2025 was 23 January 1942, at -17.1 °C.
Does it snow in Omiš?
Yes. Omiš gets on average 34.0 cm of snow per year and has around 20 frost days.
Has the climate of Omiš warmed?
Yes: Omiš warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Omiš?
The wettest day measured in Omiš between 1940 and 2025 was 9 November 1962, with 110 mm of rain in 24 hours.
What was the windiest day in Omiš?
The windiest day measured in Omiš between 1940 and 2025 was 14 November 2004, with winds reaching 50.5 km/h.
What is the warmest month in Omiš?
The warmest month in Omiš is July (22.6 °C on average); the coldest is January (4.5 °C).
How much does it rain in Omiš?
Omiš receives on average 1,247 mm of precipitation per year, spread over about 120 rainy days.
Is it sunny in Omiš?
Omiš gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.
What is the biggest single-day snowfall in Omiš?
The heaviest 24-hour snowfall measured in Omiš between 1940 and 2025 was 15 March 1962, with 17.0 cm.
Are there tropical nights in Omiš?
Yes: Omiš has on average 35 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Omiš?
In Omiš, between 1940 and 2025, the highest apparent temperature reached 36.9 °C on 17 July 2024, and the lowest was -23.4 °C on 23 January 1942.
Compare Omiš with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Omiš