I was in Belize through the 4th and had great weather the entire trip. In 10 days, it only rained twice, once at night in the Pine Ridge and once at night and early in the morning in PG. No rain at all while we were in Placencia or San Pedro.
The rainy season has not been very rainy so far. The rivers are rising in Toledo but are still very low in Cayo. If the rains come through now, it will help.
The secondary and tertiary roads are in great shape, with more dust than mud.