| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 13.3° | 8.1° | 117.6mm | 15.6 | 49 |
| February | 13.5° | 7.7° | 88.6mm | 12.5 | 54 |
| March | 14.9° | 8.9° | 80.4mm | 12.3 | 59 |
| April | 15.9° | 10° | 76.3mm | 13.1 | 61 |
| May | 17.8° | 12.3° | 66.5mm | 12.3 | 68 |
| June | 20.3° | 15.1° | 58.5mm | 10.7 | 79 |
| July | 22.4° | 17.1° | 46.7mm | 10.3 | 79 |
| August | 23.2° | 17.6° | 54.2mm | 10.5 | 79 |
| September | 22° | 16° | 87.8mm | 10.4 | 79 |
| October | 20.3° | 14° | 119mm | 13.3 | 73 |
| November | 16° | 10.5° | 167.9mm | 17 | 57 |
| December | 14.2° | 8.9° | 122.4mm | 14.9 | 52 |
January in Santander averages a daily high of 13.3°C with nights around 8.1°C. Expect roughly 15.6 wet days totalling 117.6mm. Demanding conditions — pack for it and plan indoor options.
February in Santander averages a daily high of 13.5°C with nights around 7.7°C. Expect roughly 12.5 wet days totalling 88.6mm. Demanding conditions — pack for it and plan indoor options.
March in Santander averages a daily high of 14.9°C with nights around 8.9°C. Expect roughly 12.3 wet days totalling 80.4mm. Generally workable, with some weather to plan around.
April in Santander averages a daily high of 15.9°C with nights around 10°C. Expect roughly 13.1 wet days totalling 76.3mm. Generally workable, with some weather to plan around.
May in Santander averages a daily high of 17.8°C with nights around 12.3°C. Expect roughly 12.3 wet days totalling 66.5mm. Generally workable, with some weather to plan around.
June in Santander averages a daily high of 20.3°C with nights around 15.1°C. Expect roughly 10.7 wet days totalling 58.5mm. Comfortable conditions for being outdoors all day.
July in Santander averages a daily high of 22.4°C with nights around 17.1°C. Expect roughly 10.3 wet days totalling 46.7mm. Comfortable conditions for being outdoors all day.
August in Santander averages a daily high of 23.2°C with nights around 17.6°C. Expect roughly 10.5 wet days totalling 54.2mm. Comfortable conditions for being outdoors all day.
September in Santander averages a daily high of 22°C with nights around 16°C. Expect roughly 10.4 wet days totalling 87.8mm. Comfortable conditions for being outdoors all day.
October in Santander averages a daily high of 20.3°C with nights around 14°C. Expect roughly 13.3 wet days totalling 119mm. Generally workable, with some weather to plan around.
November in Santander averages a daily high of 16°C with nights around 10.5°C. Expect roughly 17 wet days totalling 167.9mm. Generally workable, with some weather to plan around.
December in Santander averages a daily high of 14.2°C with nights around 8.9°C. Expect roughly 14.9 wet days totalling 122.4mm. 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. Santander peaks at 79.
Based on 30 years of records, June–October scores highest for comfort in Santander, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 23.2°C.
November is the wettest, averaging 167.9mm of rain across roughly 17 wet days.
January is the coolest month, with average daily highs around 13.3°C.