| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 16.5° | 5° | 52.7mm | 8 | 73 |
| February | 16.9° | 6.1° | 41.6mm | 7.3 | 75 |
| March | 18.9° | 8.4° | 38.5mm | 7.1 | 82 |
| April | 21.5° | 10.2° | 33.2mm | 5.8 | 88 |
| May | 24.9° | 13.3° | 22.2mm | 4.3 | 91 |
| June | 28.9° | 17° | 4.3mm | 2.1 | 88 |
| July | 32.3° | 20.4° | 0.7mm | 0.7 | 77 |
| August | 32.4° | 20.6° | 1.8mm | 1 | 76 |
| September | 29° | 18.2° | 21.2mm | 4.3 | 83 |
| October | 26.1° | 14.4° | 30.9mm | 5 | 90 |
| November | 20.3° | 9.8° | 61.2mm | 8.5 | 83 |
| December | 17.2° | 7.4° | 55mm | 7.5 | 76 |
January in Mostaganem averages a daily high of 16.5°C with nights around 5°C. Expect roughly 8 wet days totalling 52.7mm. Generally workable, with some weather to plan around.
February in Mostaganem averages a daily high of 16.9°C with nights around 6.1°C. Expect roughly 7.3 wet days totalling 41.6mm. Comfortable conditions for being outdoors all day.
March in Mostaganem averages a daily high of 18.9°C with nights around 8.4°C. Expect roughly 7.1 wet days totalling 38.5mm. Comfortable conditions for being outdoors all day.
April in Mostaganem averages a daily high of 21.5°C with nights around 10.2°C. Expect roughly 5.8 wet days totalling 33.2mm. Comfortable conditions for being outdoors all day.
May in Mostaganem averages a daily high of 24.9°C with nights around 13.3°C. Expect roughly 4.3 wet days totalling 22.2mm. Comfortable conditions for being outdoors all day.
June in Mostaganem averages a daily high of 28.9°C with nights around 17°C. Rain is rare — about 2.1 wet days and 4.3mm across the month. Comfortable conditions for being outdoors all day.
July in Mostaganem averages a daily high of 32.3°C with nights around 20.4°C. Rain is rare — about 0.7 wet days and 0.7mm across the month. Comfortable conditions for being outdoors all day.
August in Mostaganem averages a daily high of 32.4°C with nights around 20.6°C. Rain is rare — about 1 wet days and 1.8mm across the month. Comfortable conditions for being outdoors all day.
September in Mostaganem averages a daily high of 29°C with nights around 18.2°C. Expect roughly 4.3 wet days totalling 21.2mm. Comfortable conditions for being outdoors all day.
October in Mostaganem averages a daily high of 26.1°C with nights around 14.4°C. Expect roughly 5 wet days totalling 30.9mm. Comfortable conditions for being outdoors all day.
November in Mostaganem averages a daily high of 20.3°C with nights around 9.8°C. Expect roughly 8.5 wet days totalling 61.2mm. Comfortable conditions for being outdoors all day.
December in Mostaganem averages a daily high of 17.2°C with nights around 7.4°C. Expect roughly 7.5 wet days totalling 55mm. 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. Mostaganem peaks at 91.
Based on 30 years of records, April–June scores highest for comfort in Mostaganem, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 32.4°C.
November is the wettest, averaging 61.2mm of rain across roughly 8.5 wet days.
January is the coolest month, with average daily highs around 16.5°C.