Climate averages 1991–2020
Toamasina weather
in September.
A warm, moderately wet month: the 9th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Toamasina: daytime highs average 23.5°C and nights cool to about 19.4°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 76 mm of rain on roughly 18 days, which makes September a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 59 min on an average September day.
The nearest other city in this atlas is Antananarivo (214 km away). In September its highs average 22.9°C, 0.6°C cooler than Toamasina, with 5.1 mm of rain.
Among the 12 cities listed in Madagascar, Toamasina ranks 7th of 12 for the warmest September highs and 11th of 12 for the driest September (rainfall, lowest first). The mean September high of those 12 cities is 25.2°C; Toamasina is 1.7°C cooler than that mean.
From September to October, average highs rise by 1.4°C to 24.9°C, and monthly rainfall rises from 76 mm to 77 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Toamasina climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.9°C23.7°C | 23.7°C | 305 | 24.9 | 13.113 h |
| February | 27.9°C23.9°C | 23.9°C | 324 | 23.2 | 12.713 h |
| March | 27.3°C23.6°C | 23.6°C | 346 | 26.2 | 12.212 h |
| April | 26.4°C22.9°C | 22.9°C | 200 | 24.2 | 11.712 h |
| May | 25.0°C21.6°C | 21.6°C | 201 | 23.5 | 11.311 h |
| June | 23.3°C19.9°C | 19.9°C | 174 | 24.2 | 11.111 h |
| July | 22.4°C18.9°C | 18.9°C | 180 | 24.3 | 11.111 h |
| August | 22.7°C18.9°C | 18.9°C | 112 | 20.8 | 11.512 h |
| September, selected | 23.5°C19.4°C | 19.4°C | 76 | 17.7 | 12.012 h |
| October | 24.9°C20.8°C | 20.8°C | 77 | 17.0 | 12.512 h |
| November | 26.3°C22.1°C | 22.1°C | 79 | 16.1 | 13.013 h |
| December | 27.4°C23.2°C | 23.2°C | 186 | 22.0 | 13.213 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Antananarivo in SeptemberMadagascar · 214 kmHigh 22.9°C · Low 11.3°C · 5.1 mm rain
- Imerintsiatosika in SeptemberMadagascar · 239 kmHigh 23.4°C · Low 11.2°C · 7.1 mm rain
- Antanifotsy in SeptemberMadagascar · 276 kmHigh 21.3°C · Low 9.0°C · 12 mm rain
- Antsirabe in SeptemberMadagascar · 314 kmHigh 23.3°C · Low 9.7°C · 10 mm rain
- Antalaha in SeptemberMadagascar · 373 kmHigh 25.4°C · Low 20.0°C · 43 mm rain
- Mahajanga in SeptemberMadagascar · 425 kmHigh 32.6°C · Low 21.9°C · 2.8 mm rain
- Sambava in SeptemberMadagascar · 439 kmHigh 25.5°C · Low 19.9°C · 88 mm rain
- Fianarantsoa in SeptemberMadagascar · 440 kmHigh 21.8°C · Low 11.8°C · 9.2 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Toamasina) is explained once on the Toamasina year overview and on the Sources, method and limits page.