Startup Weather Forecast 15 Days, Weather in Startup Today
Current weather conditions and 15 day weather forecast for Startup, 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 Startup
| 15 December 2025 Monday 9.4 ° C / 48.9°F  Light rain |
Feels Like : 9.2 ° C / 48.5°F Humidity : % 97 Pressure : 1011 mb Wind Speed : 4.7 kmph / 2.9 miles from SSE  Visibility : 6.4 km Precipitation (rainfall) : 0.23 mm Cloud (%) : 100 |
15 day weather forecast for Startup, WA, USA
Weather Forecast for next 15 Days for Startup 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 Startup, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 15 December 2025 Monday |  Moderate rain |
7.8 ° C (46.1°F) |
15.4 ° C (59.7°F) |
12 ° C (53.6°F) |
% 85 | 90% | 0 | Sunrise:07:51 AM Sunset: 04:15 PM |
Moonrise:03:49 AM Moonset: 01:22 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday |  Heavy rain |
8.3 ° C (46.9°F) |
10.6 ° C (51°F) |
9.5 ° C (49°F) |
% 91 | 89% | 0 | Sunrise:07:52 AM Sunset: 04:16 PM |
Moonrise:04:57 AM Moonset: 01:43 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday | Heavy rain |
4.2 ° C (39.6°F) |
6.5 ° C (43.7°F) |
6.5 ° C (43.6°F) |
% 88 | 89% | 0.1 | Sunrise:07:52 AM Sunset: 04:16 PM |
Moonrise:06:06 AM Moonset: 02:10 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday | Moderate rain |
2.7 ° C (36.8°F) |
8.3 ° C (46.9°F) |
5.5 ° C (41.9°F) |
% 94 | 72% | 0 | Sunrise:07:53 AM Sunset: 04:16 PM |
Moonrise:07:12 AM Moonset: 02:47 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday |  Patchy rain nearby |
1.9 ° C (35.4°F) |
3.9 ° C (39.1°F) |
3.3 ° C (38°F) |
% 94 | 83% | 0 | Sunrise:07:54 AM Sunset: 04:17 PM |
Moonrise:08:11 AM Moonset: 03:34 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Patchy rain nearby |
3 ° C (37.3°F) |
5.2 ° C (41.3°F) |
3.9 ° C (39°F) |
% 93 | 89% | 1 | Sunrise:07:54 AM Sunset: 04:17 PM |
Moonrise:09:01 AM Moonset: 04:32 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Moderate rain |
1.6 ° C (34.9°F) |
7.2 ° C (45°F) |
4 ° C (39.1°F) |
% 91 | 87% | 1 | Sunrise:07:55 AM Sunset: 04:18 PM |
Moonrise:09:41 AM Moonset: 05:39 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Patchy rain nearby |
-0.2 ° C (31.7°F) |
5.4 ° C (41.7°F) |
3.2 ° C (37.7°F) |
% 91 | 79% | 1 | Sunrise:07:55 AM Sunset: 04:18 PM |
Moonrise:10:12 AM Moonset: 06:50 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday |  Partly Cloudy |
-2.7 ° C (27.2°F) |
4.5 ° C (40°F) |
-0.4 ° C (31.4°F) |
% 88 | 0% | 2 | Sunrise:07:55 AM Sunset: 04:19 PM |
Moonrise:10:35 AM Moonset: 08:04 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Patchy rain nearby |
-2.4 ° C (27.7°F) |
3.5 ° C (38.3°F) |
1.2 ° C (34.1°F) |
% 88 | 87% | 1 | Sunrise:07:56 AM Sunset: 04:19 PM |
Moonrise:10:55 AM Moonset: 09:17 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Fog |
0.7 ° C (33.3°F) |
5.5 ° C (41.8°F) |
3.1 ° C (37.5°F) |
% 96 | 0% | 1 | Sunrise:07:56 AM Sunset: 04:20 PM |
Moonrise:11:12 AM Moonset: 10:31 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday |  Sunny |
-0.1 ° C (31.8°F) |
5.6 ° C (42°F) |
2.2 ° C (36°F) |
% 88 | 0% | 2 | Sunrise:07:56 AM Sunset: 04:21 PM |
Moonrise:11:27 AM Moonset: 11:46 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Moderate rain |
3.9 ° C (38.9°F) |
9.3 ° C (48.8°F) |
6.1 ° C (42.9°F) |
% 91 | 86% | 2 | Sunrise:07:57 AM Sunset: 04:22 PM |
Moonrise:11:43 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Patchy rain nearby |
4.4 ° C (39.9°F) |
7 ° C (44.6°F) |
5.4 ° C (41.7°F) |
% 90 | 81% | 2 | Sunrise:07:57 AM Sunset: 04:22 PM |
Moonrise:12:00 PM Moonset: 01:03 AM Moon Phase ( Waxing Gibbous ) |
|
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