Hydromet predicts ‘wetter than usual’ weather for next three months. Wetter than usual weather forecast for Guyana till January. The Hydrometeorological Service has forecast wetter than usual rainfall conditions across all regions of Guyana from November 2022 to January 2023. “The usual secondary rainfall season will be augmented by persistent La Nina conditions during the season. Rainfall is expected to increase considerably from mid-November and continue at least to January 2023,” the Met Service said.