Sammamish Weather Forecast 15 Days, Weather in Sammamish Today
Current weather conditions and 15 day weather forecast for Sammamish, 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 Sammamish
| 15 December 2025 Monday 11.1 ° C / 52°F  Overcast |
Feels Like : 11.5 ° C / 52.6°F Humidity : % 97 Pressure : 1009 mb Wind Speed : 3.6 kmph / 2.2 miles from SSW  Visibility : 16 km Precipitation (rainfall) : 0.56 mm Cloud (%) : 100 |
15 day weather forecast for Sammamish, WA, USA
Weather Forecast for next 15 Days for Sammamish 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 Sammamish, 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 |
8.1 ° C (46.7°F) |
14.9 ° C (58.8°F) |
11.9 ° C (53.4°F) |
% 83 | 89% | 0 | Sunrise:07:50 AM Sunset: 04:17 PM |
Moonrise:03:49 AM Moonset: 01:23 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday |  Heavy rain |
8.7 ° C (47.7°F) |
11.1 ° C (51.9°F) |
9.9 ° C (49.8°F) |
% 88 | 82% | 0 | Sunrise:07:51 AM Sunset: 04:17 PM |
Moonrise:04:57 AM Moonset: 01:45 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday | Heavy rain |
5.8 ° C (42.4°F) |
7.3 ° C (45.1°F) |
7.1 ° C (44.8°F) |
% 83 | 83% | 0.1 | Sunrise:07:52 AM Sunset: 04:18 PM |
Moonrise:06:05 AM Moonset: 02:12 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday | Moderate rain |
4.2 ° C (39.6°F) |
8.6 ° C (47.5°F) |
6 ° C (42.8°F) |
% 90 | 82% | 0 | Sunrise:07:52 AM Sunset: 04:18 PM |
Moonrise:07:11 AM Moonset: 02:49 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday |  Patchy rain nearby |
2.3 ° C (36.2°F) |
4.7 ° C (40.5°F) |
3.5 ° C (38.2°F) |
% 90 | 89% | 0 | Sunrise:07:53 AM Sunset: 04:18 PM |
Moonrise:08:10 AM Moonset: 03:36 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Patchy rain nearby |
2.3 ° C (36.1°F) |
6.1 ° C (43°F) |
4.2 ° C (39.5°F) |
% 88 | 86% | 1 | Sunrise:07:54 AM Sunset: 04:19 PM |
Moonrise:09:01 AM Moonset: 04:34 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Moderate rain |
1.9 ° C (35.4°F) |
7.8 ° C (46.1°F) |
4.4 ° C (39.8°F) |
% 90 | 84% | 1 | Sunrise:07:54 AM Sunset: 04:19 PM |
Moonrise:09:41 AM Moonset: 05:40 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Patchy rain nearby |
0.2 ° C (32.4°F) |
6 ° C (42.9°F) |
3.8 ° C (38.8°F) |
% 87 | 88% | 1 | Sunrise:07:55 AM Sunset: 04:20 PM |
Moonrise:10:11 AM Moonset: 06:52 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday |  Sunny |
-1.5 ° C (29.4°F) |
4.4 ° C (40°F) |
0.5 ° C (32.9°F) |
% 86 | 0% | 2 | Sunrise:07:55 AM Sunset: 04:20 PM |
Moonrise:10:35 AM Moonset: 08:05 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Patchy rain nearby |
-0.2 ° C (31.7°F) |
3.5 ° C (38.3°F) |
2.2 ° C (36°F) |
% 86 | 77% | 1 | Sunrise:07:55 AM Sunset: 04:21 PM |
Moonrise:10:55 AM Moonset: 09:18 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Mist |
2.4 ° C (36.3°F) |
5.7 ° C (42.3°F) |
4 ° C (39.2°F) |
% 95 | 0% | 1 | Sunrise:07:56 AM Sunset: 04:22 PM |
Moonrise:11:12 AM Moonset: 10:32 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Sunny |
1.7 ° C (35.1°F) |
6.5 ° C (43.7°F) |
3.4 ° C (38.1°F) |
% 87 | 0% | 2 | Sunrise:07:56 AM Sunset: 04:22 PM |
Moonrise:11:28 AM Moonset: 11:47 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Moderate rain |
4.4 ° C (40°F) |
10.1 ° C (50.2°F) |
6.8 ° C (44.3°F) |
% 90 | 88% | 2 | Sunrise:07:56 AM Sunset: 04:23 PM |
Moonrise:11:44 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Patchy rain nearby |
4 ° C (39.2°F) |
7 ° C (44.6°F) |
5.2 ° C (41.4°F) |
% 90 | 78% | 2 | Sunrise:07:56 AM Sunset: 04:24 PM |
Moonrise:12:01 PM Moonset: 01:03 AM Moon Phase ( Waxing Gibbous ) |
|
Add a link to your web page; copy and paste this html to your web page