| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 16.6° | 4.6° | 62.7mm | 10.2 | 69 |
| February | 16.6° | 4.6° | 72.8mm | 11.4 | 66 |
| March | 19.6° | 6.3° | 70.9mm | 10.2 | 78 |
| April | 23.4° | 8.7° | 48.6mm | 8.3 | 83 |
| May | 27.5° | 11.4° | 39.3mm | 7.6 | 83 |
| June | 33.2° | 15.6° | 16.4mm | 3.9 | 67 |
| July | 37° | 18.7° | 3.5mm | 1.5 | 57 |
| August | 36.2° | 19.2° | 10.3mm | 2.8 | 58 |
| September | 31.8° | 17.4° | 39.9mm | 7 | 67 |
| October | 28.8° | 13.7° | 43.7mm | 7.4 | 78 |
| November | 21.8° | 9.5° | 67.7mm | 8.9 | 82 |
| December | 17.4° | 6.4° | 68.4mm | 11.1 | 69 |
January in Guelma averages a daily high of 16.6°C with nights around 4.6°C. Expect roughly 10.2 wet days totalling 62.7mm. Generally workable, with some weather to plan around.
February in Guelma averages a daily high of 16.6°C with nights around 4.6°C. Expect roughly 11.4 wet days totalling 72.8mm. Generally workable, with some weather to plan around.
March in Guelma averages a daily high of 19.6°C with nights around 6.3°C. Expect roughly 10.2 wet days totalling 70.9mm. Comfortable conditions for being outdoors all day.
April in Guelma averages a daily high of 23.4°C with nights around 8.7°C. Expect roughly 8.3 wet days totalling 48.6mm. Comfortable conditions for being outdoors all day.
May in Guelma averages a daily high of 27.5°C with nights around 11.4°C. Expect roughly 7.6 wet days totalling 39.3mm. Comfortable conditions for being outdoors all day.
June in Guelma averages a daily high of 33.2°C with nights around 15.6°C. Expect roughly 3.9 wet days totalling 16.4mm. Generally workable, with some weather to plan around.
July in Guelma averages a daily high of 37°C with nights around 18.7°C. Rain is rare — about 1.5 wet days and 3.5mm across the month. Generally workable, with some weather to plan around.
August in Guelma averages a daily high of 36.2°C with nights around 19.2°C. Rain is rare — about 2.8 wet days and 10.3mm across the month. Generally workable, with some weather to plan around.
September in Guelma averages a daily high of 31.8°C with nights around 17.4°C. Expect roughly 7 wet days totalling 39.9mm. Generally workable, with some weather to plan around.
October in Guelma averages a daily high of 28.8°C with nights around 13.7°C. Expect roughly 7.4 wet days totalling 43.7mm. Comfortable conditions for being outdoors all day.
November in Guelma averages a daily high of 21.8°C with nights around 9.5°C. Expect roughly 8.9 wet days totalling 67.7mm. Comfortable conditions for being outdoors all day.
December in Guelma averages a daily high of 17.4°C with nights around 6.4°C. Expect roughly 11.1 wet days totalling 68.4mm. 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. Guelma peaks at 83.
Based on 30 years of records, March–May scores highest for comfort in Guelma, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 37°C.
February is the wettest, averaging 72.8mm of rain across roughly 11.4 wet days.
January is the coolest month, with average daily highs around 16.6°C.