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
| 12 May 2026 Tuesday 16.7 ° C / 62.1°F  Overcast |
Feels Like : 16.7 ° C / 62.1°F Humidity : % 86 Pressure : 1015 mb Wind Speed : 11.9 kmph / 7.4 miles from SSW  Visibility : 14 km Precipitation (rainfall) : 0.01 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 12 May 2026 Tuesday |  Patchy rain nearby |
14.4 ° C (57.9°F) |
19.2 ° C (66.6°F) |
16.2 ° C (61.1°F) |
% 93 | 87% | 9.3 | Sunrise:05:51 AM Sunset: 07:40 PM |
Moonrise:03:02 AM Moonset: 03:22 PM Moon Phase ( Waning Crescent ) |
|
| 13 May 2026 Wednesday |  Sunny |
13 ° C (55.5°F) |
21.4 ° C (70.5°F) |
16.7 ° C (62.1°F) |
% 70 | 0% | 8.9 | Sunrise:05:51 AM Sunset: 07:40 PM |
Moonrise:03:30 AM Moonset: 04:28 PM Moon Phase ( Waning Crescent ) |
|
| 14 May 2026 Thursday | Sunny |
12.2 ° C (53.9°F) |
22.4 ° C (72.3°F) |
17.1 ° C (62.8°F) |
% 69 | 0% | 9.7 | Sunrise:05:50 AM Sunset: 07:41 PM |
Moonrise:04:01 AM Moonset: 05:38 PM Moon Phase ( Waning Crescent ) |
|
| 15 May 2026 Friday | Sunny |
12.9 ° C (55.2°F) |
22.3 ° C (72.1°F) |
17.2 ° C (63°F) |
% 72 | 0% | 0 | Sunrise:05:49 AM Sunset: 07:42 PM |
Moonrise:04:36 AM Moonset: 06:52 PM Moon Phase ( Waning Crescent ) |
|
| 16 May 2026 Saturday | Sunny |
12.7 ° C (54.8°F) |
21.7 ° C (71°F) |
16.9 ° C (62.5°F) |
% 71 | 0% | 5 | Sunrise:05:48 AM Sunset: 07:43 PM |
Moonrise:05:18 AM Moonset: 08:08 PM Moon Phase ( New Moon ) |
|
| 17 May 2026 Sunday | Patchy rain nearby |
14.3 ° C (57.8°F) |
19.5 ° C (67.2°F) |
16.3 ° C (61.3°F) |
% 67 | 80% | 4 | Sunrise:05:48 AM Sunset: 07:43 PM |
Moonrise:06:09 AM Moonset: 09:24 PM Moon Phase ( Waxing Crescent ) |
|
| 18 May 2026 Monday | Sunny |
13 ° C (55.4°F) |
21.5 ° C (70.7°F) |
16.8 ° C (62.3°F) |
% 66 | 0% | 5 | Sunrise:05:47 AM Sunset: 07:44 PM |
Moonrise:07:10 AM Moonset: 10:31 PM Moon Phase ( Waxing Crescent ) |
|
| 19 May 2026 Tuesday | Sunny |
13.2 ° C (55.8°F) |
23.4 ° C (74.2°F) |
18 ° C (64.4°F) |
% 66 | 0% | 5 | Sunrise:05:47 AM Sunset: 07:45 PM |
Moonrise:08:19 AM Moonset: 11:29 PM Moon Phase ( Waxing Crescent ) |
|
| 20 May 2026 Wednesday | Sunny |
13.5 ° C (56.4°F) |
23.8 ° C (74.8°F) |
18.2 ° C (64.8°F) |
% 65 | 0% | 5 | Sunrise:05:46 AM Sunset: 07:45 PM |
Moonrise:09:32 AM Moonset: No moonset Moon Phase ( Waxing Crescent ) |
|
| 21 May 2026 Thursday | Sunny |
13.4 ° C (56.1°F) |
23 ° C (73.5°F) |
17.7 ° C (63.9°F) |
% 66 | 0% | 5 | Sunrise:05:45 AM Sunset: 07:46 PM |
Moonrise:10:43 AM Moonset: 12:16 AM Moon Phase ( Waxing Crescent ) |
|
| 22 May 2026 Friday | Sunny |
12.1 ° C (53.9°F) |
22.1 ° C (71.7°F) |
16.9 ° C (62.4°F) |
% 70 | 0% | 5 | Sunrise:05:45 AM Sunset: 07:47 PM |
Moonrise:11:52 AM Moonset: 12:54 AM Moon Phase ( Waxing Crescent ) |
|
| 23 May 2026 Saturday | Sunny |
12.2 ° C (53.9°F) |
22.7 ° C (72.9°F) |
17 ° C (62.6°F) |
% 72 | 0% | 5 | Sunrise:05:44 AM Sunset: 07:47 PM |
Moonrise:12:56 PM Moonset: 01:27 AM Moon Phase ( First Quarter ) |
|
| 24 May 2026 Sunday |  Partly Cloudy |
12.2 ° C (54°F) |
21 ° C (69.7°F) |
16.5 ° C (61.7°F) |
% 71 | 0% | 5 | Sunrise:05:44 AM Sunset: 07:48 PM |
Moonrise:01:57 PM Moonset: 01:55 AM Moon Phase ( Waxing Gibbous ) |
|
| 25 May 2026 Monday | Sunny |
12.6 ° C (54.7°F) |
20 ° C (68°F) |
16.3 ° C (61.3°F) |
% 67 | 0% | 5 | Sunrise:05:43 AM Sunset: 07:49 PM |
Moonrise:02:55 PM Moonset: 02:21 AM Moon Phase ( Waxing Gibbous ) |
|
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