Newcastle Weather Forecast 15 Days, Weather in Newcastle Today
Current weather conditions and 15 day weather forecast for Newcastle, Washington, 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 Newcastle
| 05 December 2025 Friday 8.3 ° C / 46.9°F  Mist |
Feels Like : 8.4 ° C / 47°F Humidity : % 97 Pressure : 1020 mb Wind Speed : 3.6 kmph / 2.2 miles from S  Visibility : 8 km Precipitation (rainfall) : 0.85 mm Cloud (%) : 100 |
15 day weather forecast for Newcastle, WA, USA
Weather Forecast for next 15 Days for Newcastle 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 Newcastle, Washington 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 05 December 2025 Friday |  Moderate rain |
7.3 ° C (45.1°F) |
11.8 ° C (53.2°F) |
9 ° C (48.1°F) |
% 95 | 85% | 0 | Sunrise:07:41 AM Sunset: 04:18 PM |
Moonrise:04:42 PM Moonset: 09:06 AM Moon Phase ( Full Moon ) |
|
| 06 December 2025 Saturday |  Overcast |
7.1 ° C (44.8°F) |
8.7 ° C (47.7°F) |
8 ° C (46.4°F) |
% 91 | 0% | 0.1 | Sunrise:07:42 AM Sunset: 04:17 PM |
Moonrise:05:58 PM Moonset: 10:08 AM Moon Phase ( Waning Gibbous ) |
|
| 07 December 2025 Sunday |  Patchy rain nearby |
6.6 ° C (43.9°F) |
9.2 ° C (48.6°F) |
8.1 ° C (46.7°F) |
% 88 | 86% | 0 | Sunrise:07:43 AM Sunset: 04:17 PM |
Moonrise:07:21 PM Moonset: 10:53 AM Moon Phase ( Waning Gibbous ) |
|
| 08 December 2025 Monday | Moderate rain |
5.8 ° C (42.4°F) |
12 ° C (53.6°F) |
8.3 ° C (46.9°F) |
% 87 | 79% | 0 | Sunrise:07:44 AM Sunset: 04:17 PM |
Moonrise:08:43 PM Moonset: 11:25 AM Moon Phase ( Waning Gibbous ) |
|
| 09 December 2025 Tuesday | Patchy rain nearby |
6.8 ° C (44.3°F) |
9.3 ° C (48.8°F) |
8.2 ° C (46.8°F) |
% 83 | 84% | 0 | Sunrise:07:45 AM Sunset: 04:17 PM |
Moonrise:10:02 PM Moonset: 11:48 AM Moon Phase ( Waning Gibbous ) |
|
| 10 December 2025 Wednesday | Patchy rain nearby |
3.5 ° C (38.4°F) |
7 ° C (44.6°F) |
5.4 ° C (41.7°F) |
% 83 | 87% | 2 | Sunrise:07:46 AM Sunset: 04:17 PM |
Moonrise:11:16 PM Moonset: 12:06 PM Moon Phase ( Waning Gibbous ) |
|
| 11 December 2025 Thursday | Patchy rain nearby |
4.6 ° C (40.2°F) |
5.5 ° C (42°F) |
5.2 ° C (41.4°F) |
% 92 | 88% | 2 | Sunrise:07:47 AM Sunset: 04:17 PM |
Moonrise:No moonrise Moonset: 12:21 PM Moon Phase ( Last Quarter ) |
|
| 12 December 2025 Friday | Patchy rain nearby |
2.2 ° C (36°F) |
4.3 ° C (39.7°F) |
3.3 ° C (37.9°F) |
% 88 | 85% | 1 | Sunrise:07:48 AM Sunset: 04:17 PM |
Moonrise:12:25 AM Moonset: 12:35 PM Moon Phase ( Waning Crescent ) |
|
| 13 December 2025 Saturday | Patchy rain nearby |
-0.6 ° C (30.9°F) |
4 ° C (39.2°F) |
1.8 ° C (35.2°F) |
% 86 | 89% | 1 | Sunrise:07:48 AM Sunset: 04:17 PM |
Moonrise:01:34 AM Moonset: 12:50 PM Moon Phase ( Waning Crescent ) |
|
| 14 December 2025 Sunday |  Moderate or heavy snow showers |
-2.9 ° C (26.8°F) |
2.5 ° C (36.4°F) |
-0.5 ° C (31.1°F) |
% 80 | 60% | 1 | Sunrise:07:49 AM Sunset: 04:17 PM |
Moonrise:02:40 AM Moonset: 01:05 PM Moon Phase ( Waning Crescent ) |
|
| 15 December 2025 Monday |  Light freezing rain |
-2.6 ° C (27.4°F) |
0.5 ° C (33°F) |
-1.4 ° C (29.5°F) |
% 88 | 72% | 1 | Sunrise:07:50 AM Sunset: 04:17 PM |
Moonrise:03:48 AM Moonset: 01:23 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday |  Patchy moderate snow |
-2.8 ° C (27°F) |
1.1 ° C (34°F) |
-1.2 ° C (29.8°F) |
% 88 | 60% | 1 | Sunrise:07:51 AM Sunset: 04:18 PM |
Moonrise:04:57 AM Moonset: 01:45 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday | Moderate or heavy snow showers |
-3.4 ° C (25.9°F) |
-1.2 ° C (29.8°F) |
-2.4 ° C (27.8°F) |
% 92 | 78% | 1 | Sunrise:07:51 AM Sunset: 04:18 PM |
Moonrise:06:05 AM Moonset: 02:13 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday | Mist |
-8.1 ° C (17.4°F) |
-2.6 ° C (27.4°F) |
-5.7 ° C (21.7°F) |
% 92 | 0% | 1 | Sunrise:07:52 AM Sunset: 04:18 PM |
Moonrise:07:10 AM Moonset: 02:49 PM Moon Phase ( Waning Crescent ) |
|
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