| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 17° | 4.5° | 26mm | 4.5 | 81 |
| February | 18.5° | 5.6° | 13.2mm | 3.6 | 88 |
| March | 21.2° | 7.6° | 36.5mm | 5.4 | 89 |
| April | 23.7° | 10.1° | 29.9mm | 5.2 | 90 |
| May | 27.4° | 13.6° | 25.6mm | 4.5 | 89 |
| June | 31.9° | 17.7° | 14mm | 2 | 76 |
| July | 34.8° | 20.7° | 1.9mm | 0.7 | 67 |
| August | 34.6° | 21.2° | 11.1mm | 1.7 | 66 |
| September | 30.6° | 18.1° | 42.7mm | 4 | 78 |
| October | 26.4° | 14° | 26.2mm | 4.7 | 91 |
| November | 20.5° | 8.6° | 30.6mm | 5.1 | 90 |
| December | 17.4° | 5.4° | 31mm | 4.5 | 83 |
January in Cartagena averages a daily high of 17°C with nights around 4.5°C. Expect roughly 4.5 wet days totalling 26mm. Comfortable conditions for being outdoors all day.
February in Cartagena averages a daily high of 18.5°C with nights around 5.6°C. Expect roughly 3.6 wet days totalling 13.2mm. Comfortable conditions for being outdoors all day.
March in Cartagena averages a daily high of 21.2°C with nights around 7.6°C. Expect roughly 5.4 wet days totalling 36.5mm. Comfortable conditions for being outdoors all day.
April in Cartagena averages a daily high of 23.7°C with nights around 10.1°C. Expect roughly 5.2 wet days totalling 29.9mm. Comfortable conditions for being outdoors all day.
May in Cartagena averages a daily high of 27.4°C with nights around 13.6°C. Expect roughly 4.5 wet days totalling 25.6mm. Comfortable conditions for being outdoors all day.
June in Cartagena averages a daily high of 31.9°C with nights around 17.7°C. Rain is rare — about 2 wet days and 14mm across the month. Comfortable conditions for being outdoors all day.
July in Cartagena averages a daily high of 34.8°C with nights around 20.7°C. Rain is rare — about 0.7 wet days and 1.9mm across the month. Generally workable, with some weather to plan around.
August in Cartagena averages a daily high of 34.6°C with nights around 21.2°C. Rain is rare — about 1.7 wet days and 11.1mm across the month. Generally workable, with some weather to plan around.
September in Cartagena averages a daily high of 30.6°C with nights around 18.1°C. Expect roughly 4 wet days totalling 42.7mm. Comfortable conditions for being outdoors all day.
October in Cartagena averages a daily high of 26.4°C with nights around 14°C. Expect roughly 4.7 wet days totalling 26.2mm. Comfortable conditions for being outdoors all day.
November in Cartagena averages a daily high of 20.5°C with nights around 8.6°C. Expect roughly 5.1 wet days totalling 30.6mm. Comfortable conditions for being outdoors all day.
December in Cartagena averages a daily high of 17.4°C with nights around 5.4°C. Expect roughly 4.5 wet days totalling 31mm. 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. Cartagena peaks at 91.
Based on 30 years of records, February–May scores highest for comfort in Cartagena, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 34.8°C.
September is the wettest, averaging 42.7mm of rain across roughly 4 wet days.
January is the coolest month, with average daily highs around 17°C.