Rijeka in Summer
In summer (June, July and August), Rijeka sees average daytime highs around 24°C and overnight lows near 17°C, with 261 mm of rain over about 31 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 21°C in early June to 24°C by late August. The sky is clear or mostly clear about 52% of the time across summer, and the air most often feels humid.
Summer is Rijeka's best season of the year to visit on our travel score. For the whole year in context, see Rijeka's year-round climate.
- Avg daytime high
- 24°C
- warmest season of the year
- Avg overnight low
- 17°C
- Rainfall
- 261 mm
- 31 wet days
- Avg wind
- 8 km/h
- Travel score
- 7.1
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Rijeka in Summer
Over the season highs climb from about 21°C in early June to 24°C by late August.
A typical summer day in Rijeka reaches about 24°C and drops to 17°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Rijeka
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Rijeka weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 6° / 1° | 123 | 11.5 | 4.2 | 8.9 | 0.2 |
| Feb | 7° / 1° | 128 | 10.7 | 4.7 | 10.1 | 0.7 |
| Mar | 10° / 4° | 123 | 11.6 | 3.2 | 11.6 | 2.3 |
| Apr | 14° / 8° | 114 | 13 | 0.9 | 13.2 | 3.8 |
| May | 19° / 12° | 120 | 13.7 | 0.1 | 14.6 | 5.5 |
| Jun | 23° / 16° | 94 | 12 | 0 | 15.4 | 6.7 |
| Jul | 25° / 18° | 77 | 10 | 0 | 15.1 | 7.2 |
| Aug | 25° / 18° | 90 | 8.8 | 0 | 13.9 | 7.3 |
| Sep | 20° / 14° | 177 | 11.8 | 0 | 12.3 | 6.2 |
| Oct | 16° / 10° | 208 | 13.4 | 0.5 | 10.7 | 4.5 |
| Nov | 11° / 6° | 223 | 14.4 | 2 | 9.3 | 2.2 |
| Dec | 7° / 2° | 169 | 12.2 | 4 | 8.6 | 0.6 |
Cloud cover in Summer
The sky is clear or mostly clear about 52% of the time across summer.
Chance of precipitation in Summer
Rijeka gets around 261 mm of rain over 31 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 8 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 12 min in early June to 13 h 12 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.0 kWh/m².
Is summer a good time to visit Rijeka?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit Rijeka for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Rijeka in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Rijeka sees daytime highs around 24°C and nights near 17°C. Pack sun protection. Worth having: light clothes and rain gear. About 31 days see rain.
Sea temperature near Rijeka in Summer
The nearest coast averages about 23°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 23°C and coldest in February near 10°C.
It's comfortable for a long swim from Jun 10 to Sep 22 — about 3.5 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 10 | 10 | 10 | 12 | 17 | 21 | 23 | 23 | 21 | 18 | 15 | 12 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 10 | Bracing |
| Feb | 10 | Bracing |
| Mar | 10 | Bracing |
| Apr | 12 | Bracing |
| May | 17 | Cool |
| Jun | 21 | Refreshing |
| Jul | 23 | Refreshing |
| Aug | 23 | Refreshing |
| Sep | 21 | Refreshing |
| Oct | 18 | Cool |
| Nov | 15 | Cool |
| Dec | 12 | Bracing |
UV index in Rijeka in Summer
Clear-sky midday UV across summer averages around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Rijeka peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 5 | 7 | 7 | 8 | 9 | 8 | 5 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | Very high | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | High |
| May | 7 | High |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 5 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Rijeka?
Rijeka sits at 45.3°N, 14.4°E, 12 m above sea level, in Croatia. The nearest listed city is Cres, 41 km away.
Topography around Rijeka
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rijeka.
Within 3 km, the terrain around Rijeka has significant variations in elevation — a maximum elevation change of 379 m around an average of 77 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,375 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,767 m.
The land around Rijeka is covered by water (44%), trees (29%) and artificial surfaces (25%) within 3 km, trees (51%) and water (38%) within 16 km, and trees (62%) and water (24%) within 80 km.
Croatia travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 53% of US
- price level, 2025
- GDP per capita
- $27,104
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 87%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2023
- Road deaths
- 7.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 617
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Rijeka (45.3267°, 14.4424°, elevation 12 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.