There is no scheduled public flight service operating in Niger but mining companies chartering their own plane often sell a few spare seats to the general public although destinations are usually limited to either Agadez or Arlit. You can charter your own flight which will take you anywhere with an airstrip but this can burn a big hole in your pocket. The dry months, October to May, are very hot and, although there can be heavy rains with high temperatures in the south during July and August, they are never guaranteed. The north of the country sees scarcely any rain for most periods of the year.
Summers are extremely hot.
People of Arab descent tend to be a bit stricter than the Haussa from the south. Some of these differences are disappearing, however. Niger was a French, but one of the last places in Africa to fall under colonial rule. French is still widely speaking and if you don't speak Haussa, Pulaar or any of the other languages spoken in Niger, you will probably have to get by with your French.