Climate averages 1991–2020
Rijeka weather
in August.
A warm, wet month: the warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Rijeka: daytime highs average 27.9°C and nights cool to about 19.0°C. By daytime temperature it is the warmest month of the year.
Expect about 90 mm of rain on roughly 9 days, which makes August a wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 06 min on an average August day.
The nearest other city in this atlas is Trieste (63 km away). In August its highs average 27.7°C, about as warm as Rijeka, with 111 mm of rain.
Among the 4 cities listed in Croatia, Rijeka ranks 3rd of 4 for the warmest August highs and 4th of 4 for the driest August (rainfall, lowest first). The mean August high of those 4 cities is 28.1°C; Rijeka is 0.3°C cooler than that mean.
From August to September, average highs fall by 5.6°C to 22.3°C, and monthly rainfall rises from 90 mm to 177 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Rijeka climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.8°C0.7°C | 0.7°C | 122 | 11.5 | 9.29 h |
| February | 8.1°C0.9°C | 0.9°C | 128 | 10.8 | 10.410 h |
| March | 12.1°C4.0°C | 4.0°C | 123 | 11.6 | 11.912 h |
| April | 16.5°C8.1°C | 8.1°C | 114 | 13.0 | 13.513 h |
| May | 20.7°C12.6°C | 12.6°C | 120 | 13.7 | 14.915 h |
| June | 24.9°C16.7°C | 16.7°C | 94 | 12.0 | 15.616 h |
| July | 27.6°C18.9°C | 18.9°C | 77 | 10.0 | 15.315 h |
| August, selected | 27.9°C19.0°C | 19.0°C | 90 | 8.7 | 14.114 h |
| September | 22.3°C14.8°C | 14.8°C | 177 | 11.8 | 12.613 h |
| October | 17.3°C10.7°C | 10.7°C | 208 | 13.4 | 11.011 h |
| November | 12.2°C6.5°C | 6.5°C | 223 | 14.4 | 9.610 h |
| December | 7.7°C2.0°C | 2.0°C | 169 | 12.2 | 8.89 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Trieste in AugustItaly · 63 kmHigh 27.7°C · Low 18.9°C · 111 mm rain
- Ljubljana in AugustSlovenia · 81 kmHigh 25.2°C · Low 15.9°C · 112 mm rain
- Udine in AugustItaly · 125 kmHigh 26.5°C · Low 16.5°C · 96 mm rain
- Bihać in AugustBosnia and Herzegovina · 126 kmHigh 27.2°C · Low 16.8°C · 85 mm rain
- Zagreb in AugustCroatia · 131 kmHigh 27.4°C · Low 17.3°C · 81 mm rain
- Klagenfurt am Wörthersee in AugustAustria · 145 kmHigh 24.1°C · Low 15.3°C · 152 mm rain
- Maribor in AugustSlovenia · 165 kmHigh 25.6°C · Low 16.1°C · 108 mm rain
- Mestre in AugustItaly · 172 kmHigh 27.9°C · Low 19.6°C · 83 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Rijeka) is explained once on the Rijeka year overview and on the Sources, method and limits page.