| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 14.7° | 3.7° | 29.1mm | 5.2 | 73 |
| February | 15.7° | 4.5° | 22.6mm | 3.7 | 79 |
| March | 17.7° | 6.7° | 33.7mm | 5.4 | 82 |
| April | 19.9° | 9° | 43.9mm | 7.1 | 85 |
| May | 23.4° | 12.5° | 40.5mm | 6 | 88 |
| June | 27.5° | 16.7° | 23.1mm | 4.4 | 89 |
| July | 30.1° | 19.8° | 14.6mm | 2.9 | 82 |
| August | 30.4° | 20.2° | 32mm | 4.3 | 78 |
| September | 27° | 16.8° | 73.5mm | 6.4 | 87 |
| October | 23.3° | 13.1° | 68mm | 6.2 | 88 |
| November | 18.2° | 7.6° | 52.4mm | 5.8 | 83 |
| December | 15.3° | 4.6° | 33.4mm | 5.2 | 75 |
January in Tarragona averages a daily high of 14.7°C with nights around 3.7°C. Expect roughly 5.2 wet days totalling 29.1mm. Generally workable, with some weather to plan around.
February in Tarragona averages a daily high of 15.7°C with nights around 4.5°C. Expect roughly 3.7 wet days totalling 22.6mm. Comfortable conditions for being outdoors all day.
March in Tarragona averages a daily high of 17.7°C with nights around 6.7°C. Expect roughly 5.4 wet days totalling 33.7mm. Comfortable conditions for being outdoors all day.
April in Tarragona averages a daily high of 19.9°C with nights around 9°C. Expect roughly 7.1 wet days totalling 43.9mm. Comfortable conditions for being outdoors all day.
May in Tarragona averages a daily high of 23.4°C with nights around 12.5°C. Expect roughly 6 wet days totalling 40.5mm. Comfortable conditions for being outdoors all day.
June in Tarragona averages a daily high of 27.5°C with nights around 16.7°C. Expect roughly 4.4 wet days totalling 23.1mm. Comfortable conditions for being outdoors all day.
July in Tarragona averages a daily high of 30.1°C with nights around 19.8°C. Rain is rare — about 2.9 wet days and 14.6mm across the month. Comfortable conditions for being outdoors all day.
August in Tarragona averages a daily high of 30.4°C with nights around 20.2°C. Expect roughly 4.3 wet days totalling 32mm. Comfortable conditions for being outdoors all day.
September in Tarragona averages a daily high of 27°C with nights around 16.8°C. Expect roughly 6.4 wet days totalling 73.5mm. Comfortable conditions for being outdoors all day.
October in Tarragona averages a daily high of 23.3°C with nights around 13.1°C. Expect roughly 6.2 wet days totalling 68mm. Comfortable conditions for being outdoors all day.
November in Tarragona averages a daily high of 18.2°C with nights around 7.6°C. Expect roughly 5.8 wet days totalling 52.4mm. Comfortable conditions for being outdoors all day.
December in Tarragona averages a daily high of 15.3°C with nights around 4.6°C. Expect roughly 5.2 wet days totalling 33.4mm. Comfortable conditions for being outdoors all day.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Tarragona peaks at 89.
Based on 30 years of records, March–July scores highest for comfort in Tarragona, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 30.4°C.
September is the wettest, averaging 73.5mm of rain across roughly 6.4 wet days.
January is the coolest month, with average daily highs around 14.7°C.