Climate averages 1991–2020
Rijeka weather
in May.
A mild, wet month: the 5th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Rijeka: daytime highs average 20.7°C and nights cool to about 12.6°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 120 mm of rain on roughly 14 days, which makes May a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 51 min on an average May day.
The nearest other city in this atlas is Trieste (63 km away). In May its highs average 20.6°C, about as warm as Rijeka, with 122 mm of rain.
Among the 4 cities listed in Croatia, Rijeka ranks 4th of 4 for the warmest May highs and 4th of 4 for the driest May (rainfall, lowest first). The mean May high of those 4 cities is 21.4°C; Rijeka is 0.7°C cooler than that mean.
From May to June, average highs rise by 4.2°C to 24.9°C, and monthly rainfall falls from 120 mm to 94 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Trieste in MayItaly · 63 kmHigh 20.6°C · Low 12.3°C · 122 mm rain
- Ljubljana in MaySlovenia · 81 kmHigh 19.3°C · Low 9.7°C · 103 mm rain
- Udine in MayItaly · 125 kmHigh 20.0°C · Low 10.2°C · 115 mm rain
- Bihać in MayBosnia and Herzegovina · 126 kmHigh 20.5°C · Low 10.4°C · 127 mm rain
- Zagreb in MayCroatia · 131 kmHigh 21.2°C · Low 10.8°C · 87 mm rain
- Klagenfurt am Wörthersee in MayAustria · 145 kmHigh 18.9°C · Low 9.4°C · 119 mm rain
- Maribor in MaySlovenia · 165 kmHigh 20.4°C · Low 10.6°C · 99 mm rain
- Mestre in MayItaly · 172 kmHigh 21.3°C · Low 13.0°C · 93 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.