In the height of the rains from March through May, the trails become unpleasantly muddy.

BBC: Search the

From March through May, troops in vehicles found 64 percent of improvised explosive devices before they blew up, an 11 percentage-point increase over the previous quarter.

CENTERFORSECURITYPOLICY: UAVs and the Boston Marathon

From May to March and September through November the sky is so full of migrating cranes, storks, pelicans and flamingos, it is hard for sunlight to peek through.

BBC: Where birds know no borders

April and May are the heart of tornado season, which unofficially runs from March through June.

FORBES: Global Warming Taking The Wind Out Of Tornadoes