Average Monthly Sunshine hours in Holtsville (NY)

This graph shows the average number of hours per month that Holtsville receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

• On average, July is the sunniest month with 271 hours of sunshine.
• December has on average the lowest amount of sunshine with 141 hours.
• On average, the total annual amount of sun is 2540 hours.

Forecast: is it sunny in Holtsville (NY)?

Thu   Nov 21

11°C | 5°C

NE 25 km/h

41 mm

broken clouds and rain

hourly forecast

Fri   Nov 22

8°C | 4°C

SW 32 km/h

5.3 mm

overcast and rain

hourly forecast

Sat   Nov 23

10°C | 4°C

W 32 km/h

3 mm

broken clouds and slight rain

hourly forecast

5-Day Forecast 10-Day Forecast