Hawaii County Weather Predictions for October 19 2025
The weather predictions for Hawaii County on October 19, 2025, indicate a mix of conditions across several regions, with varying chances of rain.
Hilo Weather Forecast
In Hilo, expect numerous showers tonight, transitioning to occasional showers post-midnight. Lows will range from 65°F – 71°F near the shore to 52°F – 58°F at higher elevations (around 4,000 feet).
Sunday Outlook
- Weather: Mostly cloudy with occasional morning showers and numerous afternoon showers.
- Highs: 80°F – 87°F near the shore; 68°F at 4,000 feet.
- Winds: Northeast up to 10 mph.
- Rain Chance: 90%.
Kona Region Forecast
Kona will experience partly cloudy skies with isolated evening showers, followed by clearer conditions after midnight. Lows will be between 71°F and 76°F near the shore, reaching 50°F – 55°F at elevations near 5,000 feet.
Sunday Outlook
- Weather: Sunny in the morning with isolated showers; mostly cloudy in the afternoon with scattered showers and thunderstorms.
- Highs: 84°F – 89°F near the shore; around 68°F near 5,000 feet.
- Winds: Light; rain chance at 50%.
Waimea and Kohala Forecast
In Waimea, expect mostly cloudy conditions with scattered showers tonight, lows from 64°F to 74°F near the shore.
Sunday Outlook
- Weather: Partly sunny with breezy conditions; scattered showers in the morning and isolated showers in the afternoon.
- Highs: 82°F near the shore; 71°F – 80°F at 3,000 feet.
- Winds: East at 10 mph – 20 mph; rain chance at 50%.
South Big Island Predictions
The South Big Island will start cloudy tonight, transitioning to partly cloudy conditions by morning. Lows will be 75°F near the shore and around 55°F at higher elevations.
Sunday Outlook
- Weather: Breezy and sunny in the morning, partly sunny in the afternoon with isolated showers; haze present.
- Highs: Around 87°F near the shore; 68°F near 5,000 feet.
- Winds: East up to 20 mph; rain chance at 20%.
Hawaii County’s weather shows areas of instability, primarily affecting windward regions. Expect localized rainfall, especially in the afternoons, although some leeward areas may only experience brief showers. As the week progresses, trade winds will gain strength again.
This forecast reflects the dynamic nature of Hawaii’s weather, with variations from region to region. Residents and visitors should remain aware of the changing conditions as they plan their activities.
