The dry season generally runs from November through April and the wet season runs from May through October. Overall, the Rio Dulce receives about 60 to 100 inches of rain per year. Most tourists come during the dry season. Some rain can occur during the dry season but the mornings are invariably wonderful and rain is usually confined to a short shower during the afternoon or during the period from midnight to 6 AM and clearing up just after sunrise. This cycle will often repeat for several days in a row.
Thunderstorms are rare during the dry season.
This characteristic of the weather is ideal because the rain keeps everything fresh and the plants healthy but does not interfere with daytime activities. During the wet season, rain can occur at any time during the day or night and thunderstorms are more common. Sometimes it will rain steadily for several days without a significant break. The biggest problem in most tropical areas as a consequence of so much rain is mud. Overland travel on unpaved roads becomes difficult at best.