South Williamsport Weather Forecast 15 Days, Weather in South Williamsport Today
Current weather conditions and 15 day weather forecast for South Williamsport, Pennsylvania, 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 South Williamsport
| 21 December 2025 Sunday 3.9 ° C / 39°F  Sunny |
Feels Like : 1.8 ° C / 35.2°F Humidity : % 44 Pressure : 1018 mb Wind Speed : 8.3 kmph / 5.1 miles from WNW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for South Williamsport, PA, USA
Weather Forecast for next 15 Days for South Williamsport 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 South Williamsport, Pennsylvania 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 December 2025 Sunday |  Partly Cloudy |
-4.9 ° C (23.3°F) |
1.2 ° C (34.2°F) |
-1 ° C (30.3°F) |
% 67 | 0% | 0.3 | Sunrise:07:31 AM Sunset: 04:42 PM |
Moonrise:09:06 AM Moonset: 06:00 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Partly Cloudy |
-5.9 ° C (21.4°F) |
-0.4 ° C (31.3°F) |
-3.4 ° C (25.9°F) |
% 63 | 0% | 0.3 | Sunrise:07:31 AM Sunset: 04:43 PM |
Moonrise:09:43 AM Moonset: 07:06 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday |  Moderate or heavy snow showers |
-3.4 ° C (25.9°F) |
2 ° C (35.6°F) |
-0.6 ° C (31°F) |
% 85 | 85% | 0 | Sunrise:07:32 AM Sunset: 04:43 PM |
Moonrise:10:13 AM Moonset: 08:13 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Partly Cloudy |
-3.2 ° C (26.3°F) |
4.4 ° C (39.8°F) |
1.4 ° C (34.5°F) |
% 79 | 0% | 0.3 | Sunrise:07:32 AM Sunset: 04:44 PM |
Moonrise:10:39 AM Moonset: 09:21 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Fog |
-1.9 ° C (28.5°F) |
2.6 ° C (36.7°F) |
-0.1 ° C (31.8°F) |
% 96 | 63% | 0 | Sunrise:07:33 AM Sunset: 04:45 PM |
Moonrise:11:02 AM Moonset: 10:28 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday |  Patchy rain nearby |
0.2 ° C (32.4°F) |
13.1 ° C (55.5°F) |
4.2 ° C (39.5°F) |
% 91 | 69% | 1 | Sunrise:07:33 AM Sunset: 04:45 PM |
Moonrise:11:23 AM Moonset: 11:37 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Sunny |
-2.8 ° C (26.9°F) |
1.7 ° C (35.1°F) |
-1.3 ° C (29.7°F) |
% 65 | 0% | 2 | Sunrise:07:33 AM Sunset: 04:46 PM |
Moonrise:11:45 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Partly Cloudy |
-4.2 ° C (24.4°F) |
4.5 ° C (40.1°F) |
-0.3 ° C (31.4°F) |
% 70 | 0% | 2 | Sunrise:07:34 AM Sunset: 04:47 PM |
Moonrise:12:08 PM Moonset: 12:47 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday | Sunny |
-5.7 ° C (21.7°F) |
-1.5 ° C (29.4°F) |
-4 ° C (24.7°F) |
% 52 | 0% | 2 | Sunrise:07:34 AM Sunset: 04:47 PM |
Moonrise:12:34 PM Moonset: 02:00 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Partly Cloudy |
-7 ° C (19.4°F) |
-2.2 ° C (28°F) |
-4.7 ° C (23.5°F) |
% 63 | 0% | 2 | Sunrise:07:34 AM Sunset: 04:48 PM |
Moonrise:01:07 PM Moonset: 03:18 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday |  Heavy snow |
-4.5 ° C (23.9°F) |
-0.2 ° C (31.7°F) |
-1.5 ° C (29.3°F) |
% 97 | 72% | 1 | Sunrise:07:34 AM Sunset: 04:49 PM |
Moonrise:01:49 PM Moonset: 04:38 AM Moon Phase ( Waxing Gibbous ) |
|
| 01 January 2026 Thursday |  Overcast |
0.1 ° C (32.2°F) |
4 ° C (39.2°F) |
1.9 ° C (35.4°F) |
% 93 | 0% | 1 | Sunrise:07:34 AM Sunset: 04:50 PM |
Moonrise:02:43 PM Moonset: 05:57 AM Moon Phase ( Waxing Gibbous ) |
|
| 02 January 2026 Friday | Overcast |
-0.6 ° C (30.9°F) |
1.4 ° C (34.6°F) |
0.5 ° C (32.9°F) |
% 94 | 0% | 1 | Sunrise:07:34 AM Sunset: 04:51 PM |
Moonrise:03:50 PM Moonset: 07:08 AM Moon Phase ( Waxing Gibbous ) |
|
| 03 January 2026 Saturday |  Light sleet |
0.1 ° C (32.1°F) |
1.6 ° C (34.8°F) |
0.5 ° C (33°F) |
% 99 | 66% | 1 | Sunrise:07:34 AM Sunset: 04:52 PM |
Moonrise:05:06 PM Moonset: 08:06 AM Moon Phase ( Full Moon ) |
|
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