Climate averages 1991–2020
Toamasina weather
by month.
See how the year changes. January (tied with February) has the highest average daily maximum; September has the lowest average monthly rainfall.
Long-term climate patterns, not a forecast for a particular trip.
Across the year Toamasina averages a daytime high of 25.4°C and a nighttime low of 21.6°C, with about 2,260 mm of rain on roughly 264 days. January (tied with February) is the warmest month (average high 27.9°C) and July the coolest (22.4°C). March is the wettest month with 346 mm; September is the driest with 76 mm.
The annual picture
A year in Toamasina
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 | 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
Nearby cities
- AntananarivoMadagascar · 214 kmHigh 23.1°C · Low 13.9°C · 1,030 mm rain a year
- ImerintsiatosikaMadagascar · 239 kmHigh 23.2°C · Low 13.7°C · 1,164 mm rain a year
- AntanifotsyMadagascar · 276 kmHigh 21.2°C · Low 11.5°C · 1,503 mm rain a year
- AntsirabeMadagascar · 314 kmHigh 22.4°C · Low 12.0°C · 1,654 mm rain a year
- AntalahaMadagascar · 373 kmHigh 27.0°C · Low 22.0°C · 1,536 mm rain a year
- MahajangaMadagascar · 425 kmHigh 31.4°C · Low 23.3°C · 1,300 mm rain a year
- SambavaMadagascar · 439 kmHigh 27.2°C · Low 21.9°C · 1,972 mm rain a year
- FianarantsoaMadagascar · 440 kmHigh 22.4°C · Low 14.4°C · 1,111 mm rain a year
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 limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC+3, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at -18.20°, 49.40° (6 km from the city centre), adjusted down by 0.1°C for the difference between the city's elevation (12 m) and the cell's (-5 m). Rain comes from the 0.25° cell at -18.25°, 49.50°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.