Stony Brook Weather Forecast 15 Days, Weather in Stony Brook Today
Current weather conditions and 15 day weather forecast for Stony Brook, New York, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Stony Brook
| 21 June 2026 Sunday 23.3 ° C / 73.9°F  Sunny |
Feels Like : 24.5 ° C / 76.2°F Humidity : % 41 Pressure : 1011 mb Wind Speed : 11.9 kmph / 7.4 miles from W  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 25 |
15 day weather forecast for Stony Brook, NY, USA
Weather Forecast for next 15 Days for Stony Brook including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Stony Brook, New York state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 21 June 2026 Sunday | Sunny |
16.5 ° C (61.7°F) |
28.8 ° C (83.8°F) |
21.8 ° C (71.3°F) |
% 52 | 2% | 7.9 | Sunrise:05:20 AM Sunset: 08:27 PM |
Moonrise:12:38 PM Moonset: 12:22 AM Moon Phase ( First Quarter ) |
|
| 22 June 2026 Monday |  Heavy rain |
17.3 ° C (63.1°F) |
19.8 ° C (67.7°F) |
18.9 ° C (66°F) |
% 82 | 83% | 1.5 | Sunrise:05:21 AM Sunset: 08:28 PM |
Moonrise:01:48 PM Moonset: 12:45 AM Moon Phase ( First Quarter ) |
|
| 23 June 2026 Tuesday |  Moderate rain |
18 ° C (64.4°F) |
21.3 ° C (70.4°F) |
20.1 ° C (68.1°F) |
% 90 | 88% | 3 | Sunrise:05:21 AM Sunset: 08:28 PM |
Moonrise:02:56 PM Moonset: 01:07 AM Moon Phase ( Waxing Gibbous ) |
|
| 24 June 2026 Wednesday | Sunny |
18.2 ° C (64.7°F) |
25.5 ° C (77.9°F) |
21.5 ° C (70.8°F) |
% 67 | 17% | 8.8 | Sunrise:05:21 AM Sunset: 08:28 PM |
Moonrise:04:05 PM Moonset: 01:32 AM Moon Phase ( Waxing Gibbous ) |
|
| 25 June 2026 Thursday | Sunny |
18.4 ° C (65.1°F) |
24.3 ° C (75.8°F) |
21.1 ° C (70°F) |
% 72 | 10% | 1.5 | Sunrise:05:21 AM Sunset: 08:28 PM |
Moonrise:05:12 PM Moonset: 01:59 AM Moon Phase ( Waxing Gibbous ) |
|
| 26 June 2026 Friday |  Patchy rain nearby |
18.2 ° C (64.7°F) |
20.1 ° C (68.3°F) |
19 ° C (66.1°F) |
% 89 | 85% | 4 | Sunrise:05:22 AM Sunset: 08:28 PM |
Moonrise:06:18 PM Moonset: 02:32 AM Moon Phase ( Waxing Gibbous ) |
|
| 27 June 2026 Saturday |  Partly Cloudy |
18.1 ° C (64.5°F) |
23.3 ° C (74°F) |
20.8 ° C (69.4°F) |
% 77 | 12% | 6 | Sunrise:05:22 AM Sunset: 08:28 PM |
Moonrise:07:19 PM Moonset: 03:11 AM Moon Phase ( Full Moon ) |
|
| 28 June 2026 Sunday | Patchy rain nearby |
19.4 ° C (67°F) |
24.7 ° C (76.4°F) |
21.3 ° C (70.3°F) |
% 86 | 71% | 5 | Sunrise:05:23 AM Sunset: 08:28 PM |
Moonrise:08:13 PM Moonset: 03:58 AM Moon Phase ( Full Moon ) |
|
| 29 June 2026 Monday | Sunny |
18.8 ° C (65.9°F) |
25.9 ° C (78.6°F) |
22.1 ° C (71.8°F) |
% 62 | 4% | 6 | Sunrise:05:23 AM Sunset: 08:28 PM |
Moonrise:08:58 PM Moonset: 04:52 AM Moon Phase ( Full Moon ) |
|
| 30 June 2026 Tuesday | Sunny |
19.7 ° C (67.5°F) |
26 ° C (78.7°F) |
22.6 ° C (72.7°F) |
% 64 | 5% | 6 | Sunrise:05:24 AM Sunset: 08:28 PM |
Moonrise:09:36 PM Moonset: 05:51 AM Moon Phase ( Full Moon ) |
|
| 01 July 2026 Wednesday | Sunny |
20.7 ° C (69.3°F) |
26.1 ° C (79°F) |
23.2 ° C (73.8°F) |
% 64 | 5% | 6 | Sunrise:05:24 AM Sunset: 08:28 PM |
Moonrise:10:07 PM Moonset: 06:54 AM Moon Phase ( Waning Gibbous ) |
|
| 02 July 2026 Thursday | Sunny |
20.6 ° C (69.1°F) |
26.4 ° C (79.5°F) |
23.4 ° C (74.1°F) |
% 66 | 5% | 6 | Sunrise:05:25 AM Sunset: 08:28 PM |
Moonrise:10:32 PM Moonset: 07:57 AM Moon Phase ( Waning Gibbous ) |
|
| 03 July 2026 Friday | Patchy rain nearby |
21.4 ° C (70.5°F) |
27.2 ° C (81°F) |
23.7 ° C (74.7°F) |
% 76 | 68% | 5 | Sunrise:05:25 AM Sunset: 08:28 PM |
Moonrise:10:54 PM Moonset: 08:59 AM Moon Phase ( Waning Gibbous ) |
|
| 04 July 2026 Saturday | Moderate rain |
21 ° C (69.9°F) |
26.3 ° C (79.4°F) |
23 ° C (73.5°F) |
% 88 | 80% | 5 | Sunrise:05:26 AM Sunset: 08:27 PM |
Moonrise:11:15 PM Moonset: 10:00 AM Moon Phase ( Waning Gibbous ) |
|
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