| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 13.8° | 6.9° | 46.6mm | 7.4 | 65 |
| February | 14.9° | 7.6° | 34.9mm | 6.5 | 71 |
| March | 16.4° | 8.6° | 38.9mm | 5.8 | 77 |
| April | 20.5° | 11.9° | 22.2mm | 4.3 | 91 |
| May | 25.8° | 16.1° | 10.4mm | 2.6 | 95 |
| June | 30.8° | 20.9° | 9.1mm | 1.7 | 81 |
| July | 33.7° | 23.7° | 6.8mm | 0.6 | 72 |
| August | 33.7° | 23.9° | 3.4mm | 0.6 | 72 |
| September | 29° | 20.1° | 21.4mm | 3.1 | 86 |
| October | 23.9° | 16° | 35.1mm | 4 | 92 |
| November | 19.1° | 12.2° | 59.4mm | 6.2 | 85 |
| December | 15.5° | 9.1° | 59.3mm | 8.2 | 69 |
January in Keratsíni averages a daily high of 13.8°C with nights around 6.9°C. Expect roughly 7.4 wet days totalling 46.6mm. Generally workable, with some weather to plan around.
February in Keratsíni averages a daily high of 14.9°C with nights around 7.6°C. Expect roughly 6.5 wet days totalling 34.9mm. Generally workable, with some weather to plan around.
March in Keratsíni averages a daily high of 16.4°C with nights around 8.6°C. Expect roughly 5.8 wet days totalling 38.9mm. Comfortable conditions for being outdoors all day.
April in Keratsíni averages a daily high of 20.5°C with nights around 11.9°C. Expect roughly 4.3 wet days totalling 22.2mm. Comfortable conditions for being outdoors all day.
May in Keratsíni averages a daily high of 25.8°C with nights around 16.1°C. Rain is rare — about 2.6 wet days and 10.4mm across the month. Comfortable conditions for being outdoors all day.
June in Keratsíni averages a daily high of 30.8°C with nights around 20.9°C. Rain is rare — about 1.7 wet days and 9.1mm across the month. Comfortable conditions for being outdoors all day.
July in Keratsíni averages a daily high of 33.7°C with nights around 23.7°C. Rain is rare — about 0.6 wet days and 6.8mm across the month. Generally workable, with some weather to plan around.
August in Keratsíni averages a daily high of 33.7°C with nights around 23.9°C. Rain is rare — about 0.6 wet days and 3.4mm across the month. Generally workable, with some weather to plan around.
September in Keratsíni averages a daily high of 29°C with nights around 20.1°C. Expect roughly 3.1 wet days totalling 21.4mm. Comfortable conditions for being outdoors all day.
October in Keratsíni averages a daily high of 23.9°C with nights around 16°C. Expect roughly 4 wet days totalling 35.1mm. Comfortable conditions for being outdoors all day.
November in Keratsíni averages a daily high of 19.1°C with nights around 12.2°C. Expect roughly 6.2 wet days totalling 59.4mm. Comfortable conditions for being outdoors all day.
December in Keratsíni averages a daily high of 15.5°C with nights around 9.1°C. Expect roughly 8.2 wet days totalling 59.3mm. Generally workable, with some weather to plan around.
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. Keratsíni peaks at 95.
Based on 30 years of records, April–May scores highest for comfort in Keratsíni, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 33.7°C.
November is the wettest, averaging 59.4mm of rain across roughly 6.2 wet days.
January is the coolest month, with average daily highs around 13.8°C.