10-Day Weather Forecast - Holtsville, NY

Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 80s. West winds 5 to 10 mph. Chance of rain 20 percent.

Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 60s. Northwest winds 5 to 10 mph. Chance of rain 20 percent.

Mostly sunny. Highs in the upper 70s. North winds 5 to 10 mph.

Mostly cloudy. Lows in the lower 60s.

Mostly sunny. Highs in the lower 70s.

Mostly clear. Lows in the upper 50s.

Sunny. Highs in the mid 70s.

Mostly clear. Lows in the lower 60s.

Sunny. Highs in the upper 70s.

Partly cloudy. Lows in the lower 60s.

Mostly sunny. Highs in the mid 70s.

Mostly cloudy. Lows in the upper 60s.

Partly sunny. Highs around 80.

Mostly clear with a 45% chance for rain and thunderstorms. Low temperature around 69F. Dew point will be around 67F with an average humidity of 82%. Winds will be 7 mph from the W.

Mostly sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 78F. Dew point will be around 65F with an average humidity of 72%. Winds will be 6 mph from the W.

Partly cloudy. Low temperature around 65F. Dew point will be around 62F with an average humidity of 78%. Winds will be 4 mph from the N.

Mostly sunny. High temperature around 74F. Dew point will be around 60F with an average humidity of 71%. Winds will be 3 mph from the N.

Mostly clear. Low temperature around 65F. Dew point will be around 61F with an average humidity of 82%. Winds will be 2 mph from the S.