Weakening Hurricane Kiko Approaches Hawaii, Bringing Showers and Humidity

On Monday, September 8th, 2025, Hawaii is bracing for the approach of Hurricane Kiko. While the storm is expected to weaken to a tropical storm as it passes north of the islands, its effects will still be felt across the state.

In the morning, a slot of dry conditions will spread from east to west, with only a few lingering showers near Kauai and Oahu. However, as the day progresses, moisture along the western flank of the weakening Kiko will near the windward coasts of the Big Island and Maui.

By Monday night and Tuesday, the moisture from Kiko's periphery will spread over the entire state, leading to an increase in clouds and mainly windward showers. As the trade winds become disrupted, afternoon sea breezes will likely trigger spotty interior rainfall, which could be locally heavy in places. There is also a possibility of brief thunderstorms as the atmosphere destabilizes on Tuesday.

The humid conditions will prevail, with dew points creeping into the low to mid 70s. In addition, large surf will affect east-facing shores. As Kiko moves off to the northwest of the state on Wednesday night and Thursday, a drier air mass with moderate trade winds and a ridge aloft are expected to build in from the east, bringing a more typical pattern of windward rainfall and dew points dropping back into the mid 60s.