| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 31.3° | 22.7° | 506mm | 22 | 53 |
| February | 31.5° | 23° | 466.1mm | 19.3 | 52 |
| March | 31.1° | 22.5° | 477.9mm | 20.7 | 54 |
| April | 30.2° | 21.6° | 332mm | 19.8 | 57 |
| May | 28.6° | 20° | 327.1mm | 21 | 64 |
| June | 27° | 18° | 279.6mm | 21.3 | 70 |
| July | 26.1° | 17° | 255mm | 21.7 | 70 |
| August | 26.2° | 17.1° | 219mm | 21.9 | 70 |
| September | 26.9° | 17.3° | 163.5mm | 19.3 | 70 |
| October | 28.1° | 18.7° | 116mm | 16.3 | 66 |
| November | 29.3° | 20.4° | 104.4mm | 13.3 | 64 |
| December | 30.8° | 22° | 332.2mm | 20.3 | 55 |
January in Toamasina averages a daily high of 31.3°C with nights around 22.7°C. Expect roughly 22 wet days totalling 506mm. Demanding conditions — pack for it and plan indoor options.
February in Toamasina averages a daily high of 31.5°C with nights around 23°C. Expect roughly 19.3 wet days totalling 466.1mm. Demanding conditions — pack for it and plan indoor options.
March in Toamasina averages a daily high of 31.1°C with nights around 22.5°C. Expect roughly 20.7 wet days totalling 477.9mm. Demanding conditions — pack for it and plan indoor options.
April in Toamasina averages a daily high of 30.2°C with nights around 21.6°C. Expect roughly 19.8 wet days totalling 332mm. Generally workable, with some weather to plan around.
May in Toamasina averages a daily high of 28.6°C with nights around 20°C. Expect roughly 21 wet days totalling 327.1mm. Generally workable, with some weather to plan around.
June in Toamasina averages a daily high of 27°C with nights around 18°C. Expect roughly 21.3 wet days totalling 279.6mm. Generally workable, with some weather to plan around.
July in Toamasina averages a daily high of 26.1°C with nights around 17°C. Expect roughly 21.7 wet days totalling 255mm. Generally workable, with some weather to plan around.
August in Toamasina averages a daily high of 26.2°C with nights around 17.1°C. Expect roughly 21.9 wet days totalling 219mm. Generally workable, with some weather to plan around.
September in Toamasina averages a daily high of 26.9°C with nights around 17.3°C. Expect roughly 19.3 wet days totalling 163.5mm. Generally workable, with some weather to plan around.
October in Toamasina averages a daily high of 28.1°C with nights around 18.7°C. Expect roughly 16.3 wet days totalling 116mm. Generally workable, with some weather to plan around.
November in Toamasina averages a daily high of 29.3°C with nights around 20.4°C. Expect roughly 13.3 wet days totalling 104.4mm. Generally workable, with some weather to plan around.
December in Toamasina averages a daily high of 30.8°C with nights around 22°C. Expect roughly 20.3 wet days totalling 332.2mm. 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. Toamasina peaks at 70.
Based on 30 years of records, May–November scores highest for comfort in Toamasina, balancing daytime temperature against rainfall.
February is the warmest, averaging a daily high of 31.5°C.
January is the wettest, averaging 506mm of rain across roughly 22 wet days.
July is the coolest month, with average daily highs around 26.1°C.