San Marcos Weather Forecast 15 Days, Weather in San Marcos Today
Current weather conditions and 15 day weather forecast for San Marcos, 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 San Marcos
| 25 December 2025 Thursday 15.6 ° C / 60.1°F  Light rain |
Feels Like : 15.6 ° C / 60.1°F Humidity : % 93 Pressure : 1012 mb Wind Speed : 10.8 kmph / 6.7 miles from W  Visibility : 16 km Precipitation (rainfall) : 18.14 mm Cloud (%) : 100 |
15 day weather forecast for San Marcos, CA, USA
Weather Forecast for next 15 Days for San Marcos 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 San Marcos, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 24 December 2025 Wednesday |  Heavy rain |
15.1 ° C (59.2°F) |
23.3 ° C (73.9°F) |
17.1 ° C (62.8°F) |
% 81 | 89% | 0.1 | Sunrise:06:49 AM Sunset: 04:47 PM |
Moonrise:10:08 AM Moonset: 09:20 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Patchy rain nearby |
14 ° C (57.2°F) |
20.3 ° C (68.5°F) |
15.7 ° C (60.2°F) |
% 89 | 85% | 0.7 | Sunrise:06:50 AM Sunset: 04:48 PM |
Moonrise:10:37 AM Moonset: 10:21 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday |  Overcast |
12.2 ° C (54°F) |
16 ° C (60.8°F) |
13.7 ° C (56.7°F) |
% 89 | 0% | 0.4 | Sunrise:06:50 AM Sunset: 04:49 PM |
Moonrise:11:04 AM Moonset: 11:24 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday |  Moderate rain |
11.1 ° C (51.9°F) |
13 ° C (55.4°F) |
12.5 ° C (54.5°F) |
% 85 | 87% | 0.6 | Sunrise:06:51 AM Sunset: 04:49 PM |
Moonrise:11:32 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday |  Sunny |
9.4 ° C (49°F) |
19.1 ° C (66.5°F) |
13.4 ° C (56°F) |
% 52 | 0% | 0.6 | Sunrise:06:51 AM Sunset: 04:50 PM |
Moonrise:12:01 PM Moonset: 12:27 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday | Sunny |
10.9 ° C (51.6°F) |
20.8 ° C (69.5°F) |
13.7 ° C (56.6°F) |
% 30 | 0% | 0 | Sunrise:06:51 AM Sunset: 04:51 PM |
Moonrise:12:34 PM Moonset: 01:35 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday |  Partly Cloudy |
14.3 ° C (57.7°F) |
25 ° C (77°F) |
18.5 ° C (65.3°F) |
% 28 | 0% | 5 | Sunrise:06:52 AM Sunset: 04:51 PM |
Moonrise:01:14 PM Moonset: 02:47 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday | Patchy rain nearby |
15 ° C (59°F) |
21.1 ° C (70°F) |
17.6 ° C (63.7°F) |
% 40 | 79% | 4 | Sunrise:06:52 AM Sunset: 04:52 PM |
Moonrise:02:03 PM Moonset: 04:01 AM Moon Phase ( Waxing Gibbous ) |
|
| 01 January 2026 Thursday | Moderate rain |
15.4 ° C (59.8°F) |
18.3 ° C (65°F) |
16.6 ° C (61.9°F) |
% 83 | 89% | 4 | Sunrise:06:52 AM Sunset: 04:53 PM |
Moonrise:03:01 PM Moonset: 05:16 AM Moon Phase ( Waxing Gibbous ) |
|
| 02 January 2026 Friday | Patchy rain nearby |
16 ° C (60.8°F) |
17.3 ° C (63.1°F) |
16.5 ° C (61.7°F) |
% 92 | 88% | 4 | Sunrise:06:52 AM Sunset: 04:54 PM |
Moonrise:04:09 PM Moonset: 06:24 AM Moon Phase ( Waxing Gibbous ) |
|
| 03 January 2026 Saturday | Patchy rain nearby |
14.3 ° C (57.8°F) |
16.5 ° C (61.7°F) |
15.4 ° C (59.8°F) |
% 91 | 78% | 4 | Sunrise:06:52 AM Sunset: 04:54 PM |
Moonrise:05:23 PM Moonset: 07:24 AM Moon Phase ( Full Moon ) |
|
| 04 January 2026 Sunday | Patchy rain nearby |
11.6 ° C (52.9°F) |
15.5 ° C (59.9°F) |
13.6 ° C (56.4°F) |
% 83 | 0% | 3 | Sunrise:06:52 AM Sunset: 04:55 PM |
Moonrise:06:36 PM Moonset: 08:13 AM Moon Phase ( Waning Gibbous ) |
|
| 05 January 2026 Monday | Sunny |
10.3 ° C (50.5°F) |
17.6 ° C (63.7°F) |
13 ° C (55.5°F) |
% 69 | 0% | 4 | Sunrise:06:53 AM Sunset: 04:56 PM |
Moonrise:07:46 PM Moonset: 08:53 AM Moon Phase ( Waning Gibbous ) |
|
| 06 January 2026 Tuesday | Sunny |
9.8 ° C (49.6°F) |
19.8 ° C (67.6°F) |
13.8 ° C (56.9°F) |
% 49 | 0% | 4 | Sunrise:06:53 AM Sunset: 04:57 PM |
Moonrise:08:52 PM Moonset: 09:26 AM Moon Phase ( Waning Gibbous ) |
|
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