Williamstown Weather Forecast 15 Days, Weather in Williamstown Today
Current weather conditions and 15 day weather forecast for Williamstown, 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 Williamstown
| 15 December 2025 Monday -8.3 ° C / 17.1°F  Partly cloudy |
Feels Like : -15.8 ° C / 3.7°F Humidity : % 56 Pressure : 1027 mb Wind Speed : 20.2 kmph / 12.5 miles from NW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 75 |
15 day weather forecast for Williamstown, PA, USA
Weather Forecast for next 15 Days for Williamstown 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 Williamstown, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 15 December 2025 Monday |  Overcast |
-11.6 ° C (11.1°F) |
-3.3 ° C (26.1°F) |
-7.8 ° C (17.9°F) |
% 67 | 0% | 0.3 | Sunrise:07:24 AM Sunset: 04:41 PM |
Moonrise:03:22 AM Moonset: 01:38 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday |  Cloudy |
-6.6 ° C (20.1°F) |
1.3 ° C (34.3°F) |
-2.9 ° C (26.8°F) |
% 52 | 0% | 0.4 | Sunrise:07:24 AM Sunset: 04:41 PM |
Moonrise:04:23 AM Moonset: 02:04 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday | Overcast |
-2.1 ° C (28.2°F) |
5.4 ° C (41.7°F) |
1.8 ° C (35.2°F) |
% 58 | 0% | 0.2 | Sunrise:07:25 AM Sunset: 04:41 PM |
Moonrise:05:27 AM Moonset: 02:37 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday |  Mist |
-4.4 ° C (24°F) |
3.7 ° C (38.6°F) |
0.2 ° C (32.3°F) |
% 93 | 62% | 0.2 | Sunrise:07:26 AM Sunset: 04:42 PM |
Moonrise:06:28 AM Moonset: 03:16 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday |  Moderate rain |
-4.4 ° C (24°F) |
5 ° C (40.9°F) |
4.7 ° C (40.5°F) |
% 87 | 89% | 0 | Sunrise:07:26 AM Sunset: 04:42 PM |
Moonrise:07:26 AM Moonset: 04:04 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Partly Cloudy |
-5.3 ° C (22.4°F) |
2 ° C (35.6°F) |
-1.8 ° C (28.8°F) |
% 73 | 0% | 2 | Sunrise:07:27 AM Sunset: 04:43 PM |
Moonrise:08:18 AM Moonset: 05:00 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday |  Patchy rain nearby |
0.2 ° C (32.3°F) |
3.6 ° C (38.5°F) |
2.9 ° C (37.1°F) |
% 82 | 84% | 1 | Sunrise:07:27 AM Sunset: 04:43 PM |
Moonrise:09:02 AM Moonset: 06:01 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday |  Sunny |
-4.7 ° C (23.6°F) |
1.6 ° C (34.8°F) |
-1.9 ° C (28.5°F) |
% 74 | 0% | 2 | Sunrise:07:28 AM Sunset: 04:44 PM |
Moonrise:09:39 AM Moonset: 07:07 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Partly Cloudy |
-4.5 ° C (23.9°F) |
2.8 ° C (37.1°F) |
-1.2 ° C (29.8°F) |
% 74 | 0% | 2 | Sunrise:07:28 AM Sunset: 04:44 PM |
Moonrise:10:10 AM Moonset: 08:13 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Partly Cloudy |
-1.2 ° C (29.8°F) |
7.4 ° C (45.2°F) |
2.4 ° C (36.3°F) |
% 76 | 0% | 2 | Sunrise:07:29 AM Sunset: 04:45 PM |
Moonrise:10:36 AM Moonset: 09:21 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Light snow |
-4.7 ° C (23.5°F) |
0.4 ° C (32.7°F) |
-2 ° C (28.4°F) |
% 65 | 0% | 1 | Sunrise:07:29 AM Sunset: 04:45 PM |
Moonrise:10:59 AM Moonset: 10:27 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday |  Light freezing rain |
-6.2 ° C (20.9°F) |
-0.1 ° C (31.8°F) |
-3 ° C (26.6°F) |
% 62 | 83% | 1 | Sunrise:07:29 AM Sunset: 04:46 PM |
Moonrise:11:22 AM Moonset: 11:35 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday |  Moderate or heavy snow showers |
-2.2 ° C (28°F) |
1 ° C (33.7°F) |
-0 ° C (31.9°F) |
% 85 | 84% | 1 | Sunrise:07:30 AM Sunset: 04:47 PM |
Moonrise:11:44 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Moderate rain |
-2 ° C (28.4°F) |
3.6 ° C (38.4°F) |
1.9 ° C (35.5°F) |
% 97 | 86% | 1 | Sunrise:07:30 AM Sunset: 04:47 PM |
Moonrise:12:07 PM Moonset: 12:44 AM Moon Phase ( Waxing Gibbous ) |
|
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