Sunnyvale Weather Forecast 15 Days, Weather in Sunnyvale Today
Current weather conditions and 15 day weather forecast for Sunnyvale, California, 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 Sunnyvale
| 17 December 2025 Wednesday 12.1 ° C / 53.8°F  Overcast |
Feels Like : 11.9 ° C / 53.5°F Humidity : % 88 Pressure : 1022 mb Wind Speed : 5.8 kmph / 3.6 miles from S  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 100 |
15 day weather forecast for Sunnyvale, CA, USA
Weather Forecast for next 15 Days for Sunnyvale 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 Sunnyvale, California 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 17 December 2025 Wednesday |  Patchy rain nearby |
8.5 ° C (47.2°F) |
18.4 ° C (65.1°F) |
12.2 ° C (53.9°F) |
% 89 | 82% | 0.3 | Sunrise:07:17 AM Sunset: 04:52 PM |
Moonrise:05:25 AM Moonset: 02:54 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday |  Mist |
7.7 ° C (45.9°F) |
15.2 ° C (59.4°F) |
11.1 ° C (51.9°F) |
% 80 | 0% | 0.4 | Sunrise:07:18 AM Sunset: 04:53 PM |
Moonrise:06:24 AM Moonset: 03:36 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday | Mist |
9.7 ° C (49.5°F) |
13.9 ° C (57°F) |
11.9 ° C (53.4°F) |
% 84 | 0% | 0.5 | Sunrise:07:18 AM Sunset: 04:53 PM |
Moonrise:07:21 AM Moonset: 04:25 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Patchy rain nearby |
10.5 ° C (50.9°F) |
19.6 ° C (67.4°F) |
14.4 ° C (57.9°F) |
% 79 | 69% | 0.4 | Sunrise:07:19 AM Sunset: 04:54 PM |
Moonrise:08:12 AM Moonset: 05:21 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Patchy rain nearby |
13.3 ° C (55.9°F) |
18.6 ° C (65.5°F) |
15.5 ° C (59.8°F) |
% 85 | 60% | 0 | Sunrise:07:19 AM Sunset: 04:54 PM |
Moonrise:08:57 AM Moonset: 06:22 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday |  Partly Cloudy |
11.8 ° C (53.2°F) |
18 ° C (64.3°F) |
13.9 ° C (57°F) |
% 80 | 0% | 4 | Sunrise:07:20 AM Sunset: 04:55 PM |
Moonrise:09:35 AM Moonset: 07:26 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Patchy rain nearby |
10.8 ° C (51.5°F) |
14.8 ° C (58.6°F) |
12.6 ° C (54.7°F) |
% 85 | 80% | 3 | Sunrise:07:20 AM Sunset: 04:55 PM |
Moonrise:10:07 AM Moonset: 08:30 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Overcast |
8.3 ° C (46.9°F) |
12.1 ° C (53.9°F) |
10.5 ° C (50.8°F) |
% 72 | 0% | 3 | Sunrise:07:21 AM Sunset: 04:56 PM |
Moonrise:10:35 AM Moonset: 09:35 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Moderate rain |
8 ° C (46.4°F) |
11.1 ° C (51.9°F) |
9.2 ° C (48.6°F) |
% 86 | 89% | 2 | Sunrise:07:21 AM Sunset: 04:56 PM |
Moonrise:11:00 AM Moonset: 10:39 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Patchy rain nearby |
9.3 ° C (48.8°F) |
12.2 ° C (54°F) |
10.7 ° C (51.2°F) |
% 90 | 89% | 3 | Sunrise:07:21 AM Sunset: 04:57 PM |
Moonrise:11:25 AM Moonset: 11:44 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Overcast |
9.1 ° C (48.3°F) |
15.3 ° C (59.6°F) |
11.8 ° C (53.2°F) |
% 81 | 0% | 3 | Sunrise:07:22 AM Sunset: 04:58 PM |
Moonrise:11:50 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Patchy rain nearby |
8 ° C (46.3°F) |
13.1 ° C (55.6°F) |
10.4 ° C (50.8°F) |
% 72 | 63% | 3 | Sunrise:07:22 AM Sunset: 04:58 PM |
Moonrise:12:16 PM Moonset: 12:52 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday |  Sunny |
6.7 ° C (44°F) |
13.7 ° C (56.7°F) |
9.2 ° C (48.6°F) |
% 70 | 0% | 3 | Sunrise:07:22 AM Sunset: 04:59 PM |
Moonrise:12:46 PM Moonset: 02:03 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Patchy rain nearby |
8.8 ° C (47.9°F) |
10.9 ° C (51.7°F) |
10.1 ° C (50.2°F) |
% 86 | 89% | 3 | Sunrise:07:22 AM Sunset: 05:00 PM |
Moonrise:01:23 PM Moonset: 03:17 AM Moon Phase ( Waxing Gibbous ) |
|
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