Climate

Madagascar is an island south of the equator so that means it is cool and dry there from May-October and warm and rainy from November-April. On the eastern side of the islands, which is the windward side (the side the wind blows into) it tends to rain more, (and during the rain season harsh weather like thunderstorms and even cyclones aren't uncommon) so there is an abundance of rainforest. On the western side it is dryer and has desert like terrane. 

On the image below the is the average mean temperatures throughout the year for the country Madagascar. The darkest red goes up to 85 degrees fahrenheit and the lowest green is 35 degrees fahrenheit. As you can see it doesn't get too chilly on the island and for the most part, on average, it's all about the same temperature everywhere.

http://www.bestcountryreports.com/Temperature_Map_Madagascar.php

The capitol Antananarivo during the winter it only gets about 69 degrees during the day and during the summer it reaches about 79 degrees and the annual range of temperature is only about 10-11 degrees. This is cooler compared to the city Mahajanga because it is up in the mountains so it has a higher elevation. Antananarivo gets about 11in of rain during January but none from Mapy to August. Mahajanga is located on the north western coast so it is dryer and warmer there compared to the capitol. It reaches about 85 during the warmest months and around 73 during the winter months so its range is still not too large. Then averages about 16 inches of rain in January alone but none from May to August. 
The capitol, Antananarivo, is just a bit cooler on average than it is in Honolulu. Honolulu gets up to about 85 on average but the low is the same at Antananarivo. It rains way more in Madagascar though. Honolulu gets only about 4in during the month of December but Antananarivo gets about 11in during January.
Madagascar's climate is pretty much the same throughout the year. Just gets a little cooler from May-October. Then hot and wet from November-April. I suppose you could consider that two seasons then. There just isn't too much of a drastic change.

http://www.madagascar.climatemps.com/

http://www.weather.com/weather/wxclimatology/monthly/graph/USHI0026