What the averages say
The mean annual temperature is 16.4 °C. The warmest month is August, averaging 25.2 °C with highs around 30.2 °C; the coldest is January, averaging 9.2 °C with lows of 3.8 °C. The 26 degrees between the mean high of August and the mean low of January are the real measure of how continental this climate is.
Heat, cold and extremes
On average, 41 days a year reach 30 °C or more and 14 bring frost. Neither heat nor cold dominates the year. The highest reading in the series is 39.8 °C, set in August, and the lowest -7.5 °C, in December.
Rain, sun and wind
475 mm fall each year over 86 days with measurable rain, an amount with a summer clearly drier than the rest of the year: September is the wettest month with 73 mm and July the driest with 15 mm. The sky is clear on 68 days a year. Mean wind speed is around 12 km/h and mean annual relative humidity 66 %.
Month by month
AEMET climate normals 1991-2020. Reus Aeropuerto observatory, 7.4 km from the centre at 71 m above sea level.| Monthly mean | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|
| Mean temperature | 9.2 | 9.9 | 12.2 | 14.3 | 17.8 | 21.8 | 24.7 | 25.2 | 21.7 | 17.9 | 12.8 | 9.8 |
|---|
| Mean high | 14.5 | 15.4 | 17.7 | 19.7 | 23.1 | 27.1 | 29.8 | 30.2 | 26.7 | 22.9 | 18.0 | 15.0 |
|---|
| Mean low | 3.8 | 4.3 | 6.6 | 8.9 | 12.4 | 16.5 | 19.6 | 20.1 | 16.7 | 12.8 | 7.6 | 4.6 |
|---|
| Rainfall (mm) | 29 | 24 | 34 | 41 | 45 | 22 | 15 | 36 | 73 | 73 | 48 | 34 |
|---|
| Rain days | 7.3 | 5.5 | 7.1 | 8.7 | 9.0 | 6.2 | 4.5 | 6.3 | 8.0 | 8.9 | 7.8 | 7.1 |
|---|
| Days ≥ 30 °C | 0.0 | 0.0 | 0.0 | 0.0 | 0.4 | 5.4 | 15.9 | 16.7 | 2.6 | 0.4 | 0.0 | 0.0 |
|---|
| Frost days | 5.6 | 3.0 | 0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.1 | 4.0 |
|---|
Where this data comes from
These are the 1991-2020 climate normals published by AEMET, the Spanish state meteorological agency, for the Reus Aeropuerto observatory — the nearest official station with a complete series to Tarragona today. A normal is not a forecast: it describes a thirty-year average, and any given day can depart from it widely. For tomorrow, use the forecast at the top of this page.
