Climate averages 1991–2020
Imerintsiatosika weather
in September.
A warm, very dry month: the 8th warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Imerintsiatosika: daytime highs average 23.4°C and nights cool to about 11.2°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 7.1 mm of rain on roughly 2 days, which makes September a very dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 58 min on an average September day.
The nearest other city in this atlas is Antananarivo (24 km away). In September its highs average 22.9°C, about as warm as Imerintsiatosika, with 5.1 mm of rain.
Among the 12 cities listed in Madagascar, Imerintsiatosika ranks 8th of 12 for the warmest September highs and 5th of 12 for the driest September (rainfall, lowest first). The mean September high of those 12 cities is 25.2°C; Imerintsiatosika is 1.9°C cooler than that mean.
From September to October, average highs rise by 2.1°C to 25.5°C, and monthly rainfall rises from 7.1 mm to 45 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
Imerintsiatosika climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.5°C16.7°C | 16.7°C | 305 | 21.9 | 13.113 h |
| February | 24.3°C16.7°C | 16.7°C | 273 | 19.4 | 12.713 h |
| March | 24.3°C16.3°C | 16.3°C | 147 | 15.1 | 12.212 h |
| April | 23.6°C14.9°C | 14.9°C | 38 | 7.5 | 11.712 h |
| May | 21.9°C12.9°C | 12.9°C | 15 | 2.9 | 11.211 h |
| June | 19.8°C10.7°C | 10.7°C | 3.7 | 0.8 | 11.011 h |
| July | 19.0°C9.7°C | 9.7°C | 3.7 | 1.0 | 11.111 h |
| August | 20.6°C10.0°C | 10.0°C | 3.8 | 0.9 | 11.511 h |
| September, selected | 23.4°C11.2°C | 11.2°C | 7.1 | 1.7 | 12.012 h |
| October | 25.5°C13.4°C | 13.4°C | 45 | 6.8 | 12.513 h |
| November | 26.1°C15.0°C | 15.0°C | 111 | 12.1 | 13.013 h |
| December | 25.5°C16.3°C | 16.3°C | 212 | 18.0 | 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 · 24 kmHigh 22.9°C · Low 11.3°C · 5.1 mm rain
- Antanifotsy in SeptemberMadagascar · 74 kmHigh 21.3°C · Low 9.0°C · 12 mm rain
- Antsirabe in SeptemberMadagascar · 103 kmHigh 23.3°C · Low 9.7°C · 10 mm rain
- Toamasina in SeptemberMadagascar · 239 kmHigh 23.5°C · Low 19.4°C · 76 mm rain
- Fianarantsoa in SeptemberMadagascar · 276 kmHigh 21.8°C · Low 11.8°C · 9.2 mm rain
- Mahajanga in SeptemberMadagascar · 378 kmHigh 32.6°C · Low 21.9°C · 2.8 mm rain
- Antalaha in SeptemberMadagascar · 553 kmHigh 25.4°C · Low 20.0°C · 43 mm rain
- Sambava in SeptemberMadagascar · 606 kmHigh 25.5°C · Low 19.9°C · 88 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 Imerintsiatosika) is explained once on the Imerintsiatosika year overview and on the Sources, method and limits page.