| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 14.1° | 6.3° | 151.2mm | 14.6 | 52 |
| February | 15.4° | 6.9° | 88.1mm | 11.1 | 63 |
| March | 17.5° | 8.9° | 100.7mm | 11.1 | 70 |
| April | 18.1° | 9.9° | 99.8mm | 12.8 | 68 |
| May | 20° | 12° | 77.4mm | 10.5 | 79 |
| June | 23° | 14.6° | 30.4mm | 5.4 | 89 |
| July | 24.4° | 15.5° | 23.7mm | 5.1 | 90 |
| August | 25.1° | 15.7° | 32.7mm | 4.6 | 91 |
| September | 23.5° | 14.9° | 74.5mm | 7.8 | 84 |
| October | 20.9° | 12.8° | 140.1mm | 13.4 | 73 |
| November | 16.6° | 9° | 168.7mm | 14.4 | 60 |
| December | 14.4° | 7.3° | 177.5mm | 14.9 | 52 |
January in Aveiro averages a daily high of 14.1°C with nights around 6.3°C. Expect roughly 14.6 wet days totalling 151.2mm. Demanding conditions — pack for it and plan indoor options.
February in Aveiro averages a daily high of 15.4°C with nights around 6.9°C. Expect roughly 11.1 wet days totalling 88.1mm. Generally workable, with some weather to plan around.
March in Aveiro averages a daily high of 17.5°C with nights around 8.9°C. Expect roughly 11.1 wet days totalling 100.7mm. Generally workable, with some weather to plan around.
April in Aveiro averages a daily high of 18.1°C with nights around 9.9°C. Expect roughly 12.8 wet days totalling 99.8mm. Generally workable, with some weather to plan around.
May in Aveiro averages a daily high of 20°C with nights around 12°C. Expect roughly 10.5 wet days totalling 77.4mm. Comfortable conditions for being outdoors all day.
June in Aveiro averages a daily high of 23°C with nights around 14.6°C. Expect roughly 5.4 wet days totalling 30.4mm. Comfortable conditions for being outdoors all day.
July in Aveiro averages a daily high of 24.4°C with nights around 15.5°C. Expect roughly 5.1 wet days totalling 23.7mm. Comfortable conditions for being outdoors all day.
August in Aveiro averages a daily high of 25.1°C with nights around 15.7°C. Expect roughly 4.6 wet days totalling 32.7mm. Comfortable conditions for being outdoors all day.
September in Aveiro averages a daily high of 23.5°C with nights around 14.9°C. Expect roughly 7.8 wet days totalling 74.5mm. Comfortable conditions for being outdoors all day.
October in Aveiro averages a daily high of 20.9°C with nights around 12.8°C. Expect roughly 13.4 wet days totalling 140.1mm. Generally workable, with some weather to plan around.
November in Aveiro averages a daily high of 16.6°C with nights around 9°C. Expect roughly 14.4 wet days totalling 168.7mm. Generally workable, with some weather to plan around.
December in Aveiro averages a daily high of 14.4°C with nights around 7.3°C. Expect roughly 14.9 wet days totalling 177.5mm. Demanding conditions — pack for it and plan indoor options.
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. Aveiro peaks at 91.
Based on 30 years of records, June–September scores highest for comfort in Aveiro, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 25.1°C.
December is the wettest, averaging 177.5mm of rain across roughly 14.9 wet days.
January is the coolest month, with average daily highs around 14.1°C.