Climate averages 1991–2020
Antsiranana weather
in September.
A hot, very dry month: the 9th warmest and the driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Antsiranana: daytime highs average 28.7°C and nights cool to about 21.0°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 2.6 mm of rain on fewer than one day, which makes September a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 01 min on an average September day.
The nearest other city in this atlas is Sambava (237 km away). In September its highs average 25.5°C, 3.2°C cooler than Antsiranana, with 88 mm of rain.
Among the 12 cities listed in Madagascar, Antsiranana ranks 3rd of 12 for the warmest September highs and 1st of 12 for the driest September (rainfall, lowest first). The mean September high of those 12 cities is 25.2°C; Antsiranana is 3.5°C warmer than that mean.
From September to October, average highs rise by 1.1°C to 29.9°C, and monthly rainfall rises from 2.6 mm to 13 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
Antsiranana climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.6°C24.0°C | 24.0°C | 244 | 24.4 | 12.813 h |
| February | 29.4°C24.1°C | 24.1°C | 222 | 23.9 | 12.513 h |
| March | 29.7°C24.2°C | 24.2°C | 151 | 19.2 | 12.212 h |
| April | 29.9°C24.0°C | 24.0°C | 45 | 7.9 | 11.812 h |
| May | 29.5°C23.1°C | 23.1°C | 12 | 1.9 | 11.612 h |
| June | 28.3°C21.8°C | 21.8°C | 4.7 | 1.2 | 11.411 h |
| July | 27.6°C20.9°C | 20.9°C | 5.5 | 1.3 | 11.511 h |
| August | 27.8°C20.7°C | 20.7°C | 4.1 | 0.9 | 11.712 h |
| September, selected | 28.7°C21.0°C | 21.0°C | 2.6 | 0.7 | 12.012 h |
| October | 29.9°C21.9°C | 21.9°C | 13 | 1.3 | 12.412 h |
| November | 30.5°C23.0°C | 23.0°C | 31 | 4.2 | 12.713 h |
| December | 30.4°C23.8°C | 23.8°C | 121 | 15.3 | 12.813 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
- Sambava in SeptemberMadagascar · 237 kmHigh 25.5°C · Low 19.9°C · 88 mm rain
- Antalaha in SeptemberMadagascar · 306 kmHigh 25.4°C · Low 20.0°C · 43 mm rain
- Mamoudzou in SeptemberMayotte · 444 kmHigh 26.1°C · Low 23.6°C · 12 mm rain
- Mahajanga in SeptemberMadagascar · 496 kmHigh 32.6°C · Low 21.9°C · 2.8 mm rain
- Toamasina in SeptemberMadagascar · 649 kmHigh 23.5°C · Low 19.4°C · 76 mm rain
- Moroni in SeptemberComoros · 660 kmHigh 27.9°C · Low 22.8°C · 20 mm rain
- Antananarivo in SeptemberMadagascar · 757 kmHigh 22.9°C · Low 11.3°C · 5.1 mm rain
- Imerintsiatosika in SeptemberMadagascar · 771 kmHigh 23.4°C · Low 11.2°C · 7.1 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 Antsiranana) is explained once on the Antsiranana year overview and on the Sources, method and limits page.