Climate averages 1991–2020
Rijeka weather
in December.
A cold, wet month: the 11th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Rijeka: daytime highs average 7.7°C and nights cool to about 2.0°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 169 mm of rain on roughly 12 days, which makes December a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 48 min on an average December day.
The nearest other city in this atlas is Trieste (63 km away). In December its highs average 8.0°C, about as warm as Rijeka, with 129 mm of rain.
Among the 4 cities listed in Croatia, Rijeka ranks 2nd of 4 for the warmest December highs and 3rd of 4 for the driest December (rainfall, lowest first). The mean December high of those 4 cities is 7.2°C; Rijeka is 0.5°C warmer than that mean.
From December to January, average highs fall by 0.9°C to 6.8°C, and monthly rainfall falls from 169 mm to 122 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Trieste in DecemberItaly · 63 kmHigh 8.0°C · Low 2.0°C · 129 mm rain
- Ljubljana in DecemberSlovenia · 81 kmHigh 4.3°C · Low -1.9°C · 90 mm rain
- Udine in DecemberItaly · 125 kmHigh 6.9°C · Low -1.0°C · 104 mm rain
- Bihać in DecemberBosnia and Herzegovina · 126 kmHigh 6.3°C · Low -0.2°C · 116 mm rain
- Zagreb in DecemberCroatia · 131 kmHigh 5.1°C · Low -1.2°C · 68 mm rain
- Klagenfurt am Wörthersee in DecemberAustria · 145 kmHigh 3.6°C · Low -2.8°C · 80 mm rain
- Maribor in DecemberSlovenia · 165 kmHigh 4.8°C · Low -1.9°C · 62 mm rain
- Mestre in DecemberItaly · 172 kmHigh 8.0°C · Low 2.0°C · 81 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.