Climate averages 1991–2020
Imerintsiatosika weather
in December.
A warm, very wet month: the joint 2nd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Imerintsiatosika: daytime highs average 25.5°C and nights cool to about 16.3°C. By daytime temperature it is the joint 2nd warmest of the 12 months.
Expect about 212 mm of rain on roughly 18 days, which makes December a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 15 min on an average December day.
The nearest other city in this atlas is Antananarivo (24 km away). In December its highs average 25.7°C, about as warm as Imerintsiatosika, with 181 mm of rain.
Among the 12 cities listed in Madagascar, Imerintsiatosika ranks 9th of 12 for the warmest December highs and 10th of 12 for the driest December (rainfall, lowest first). The mean December high of those 12 cities is 27.6°C; Imerintsiatosika is 2.1°C cooler than that mean.
From December to January, average highs fall by 1.0°C to 24.5°C, and monthly rainfall rises from 212 mm to 305 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Antananarivo in DecemberMadagascar · 24 kmHigh 25.7°C · Low 16.4°C · 181 mm rain
- Antanifotsy in DecemberMadagascar · 74 kmHigh 23.6°C · Low 14.2°C · 308 mm rain
- Antsirabe in DecemberMadagascar · 103 kmHigh 24.2°C · Low 14.8°C · 333 mm rain
- Toamasina in DecemberMadagascar · 239 kmHigh 27.4°C · Low 23.2°C · 186 mm rain
- Fianarantsoa in DecemberMadagascar · 276 kmHigh 25.2°C · Low 17.1°C · 209 mm rain
- Mahajanga in DecemberMadagascar · 378 kmHigh 31.2°C · Low 24.6°C · 205 mm rain
- Antalaha in DecemberMadagascar · 553 kmHigh 28.9°C · Low 23.3°C · 173 mm rain
- Sambava in DecemberMadagascar · 606 kmHigh 29.2°C · Low 23.4°C · 179 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.