Port Costa Weather Forecast 15 Days, Weather in Port Costa Today
Current weather conditions and 15 day weather forecast for Port Costa, 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 Port Costa
| 04 November 2026 Wednesday 12.8 ° C / 55°F  Clear |
Feels Like : 10 ° C / 50°F Humidity : % 74 Pressure : 1018 mb Wind Speed : 14.4 kmph / 8.9 miles from E  Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 2 |
15 day weather forecast for Port Costa, CA, USA
Weather Forecast for next 15 Days for Port Costa 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 Port Costa, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 04 November 2026 Wednesday | Sunny |
9.5 ° C (49.1°F) |
19 ° C (66.2°F) |
14.8 ° C (58.6°F) |
% 67 | 9% | 3.2 | Sunrise:06:37 AM Sunset: 05:06 PM |
Moonrise:01:36 AM Moonset: 02:32 PM Moon Phase ( Waning Crescent ) |
|
| 05 November 2026 Thursday | Sunny |
9.8 ° C (49.7°F) |
21.9 ° C (71.5°F) |
16 ° C (60.8°F) |
% 58 | 5% | 3.3 | Sunrise:06:38 AM Sunset: 05:05 PM |
Moonrise:02:46 AM Moonset: 02:58 PM Moon Phase ( Waning Crescent ) |
|
| 06 November 2026 Friday | Sunny |
10.9 ° C (51.7°F) |
21.8 ° C (71.3°F) |
16.5 ° C (61.6°F) |
% 53 | 6% | 3.5 | Sunrise:06:39 AM Sunset: 05:04 PM |
Moonrise:03:56 AM Moonset: 03:25 PM Moon Phase ( Waning Crescent ) |
|
| 07 November 2026 Saturday | Sunny |
11.1 ° C (52°F) |
23 ° C (73.5°F) |
17 ° C (62.6°F) |
% 43 | 1% | 3.6 | Sunrise:06:40 AM Sunset: 05:03 PM |
Moonrise:05:07 AM Moonset: 03:54 PM Moon Phase ( New Moon ) |
|
| 08 November 2026 Sunday | Sunny |
11 ° C (51.9°F) |
22.2 ° C (71.9°F) |
16.1 ° C (61.1°F) |
% 58 | 4% | 6 | Sunrise:06:42 AM Sunset: 05:02 PM |
Moonrise:06:18 AM Moonset: 04:26 PM Moon Phase ( New Moon ) |
|
| 09 November 2026 Monday |  Partly Cloudy |
11.6 ° C (52.8°F) |
18.6 ° C (65.4°F) |
14.8 ° C (58.7°F) |
% 74 | 13% | 5 | Sunrise:06:43 AM Sunset: 05:01 PM |
Moonrise:07:28 AM Moonset: 05:05 PM Moon Phase ( New Moon ) |
|
| 10 November 2026 Tuesday | Partly Cloudy |
10 ° C (49.9°F) |
18.9 ° C (66.1°F) |
14.6 ° C (58.3°F) |
% 70 | 10% | 5 | Sunrise:06:44 AM Sunset: 05:00 PM |
Moonrise:08:35 AM Moonset: 05:50 PM Moon Phase ( New Moon ) |
|
| 11 November 2026 Wednesday |  Patchy rain nearby |
12 ° C (53.7°F) |
17.4 ° C (63.2°F) |
15.1 ° C (59.1°F) |
% 75 | 55% | 4 | Sunrise:06:45 AM Sunset: 05:00 PM |
Moonrise:09:37 AM Moonset: 06:42 PM Moon Phase ( Waxing Crescent ) |
|
| 12 November 2026 Thursday |  Overcast |
12.1 ° C (53.8°F) |
16.7 ° C (62.1°F) |
14.4 ° C (57.9°F) |
% 75 | 84% | 4 | Sunrise:06:46 AM Sunset: 04:59 PM |
Moonrise:10:31 AM Moonset: 07:39 PM Moon Phase ( Waxing Crescent ) |
|
| 13 November 2026 Friday |  Light rain shower |
10.7 ° C (51.3°F) |
13.7 ° C (56.6°F) |
12.1 ° C (53.7°F) |
% 73 | 77% | 3 | Sunrise:06:47 AM Sunset: 04:58 PM |
Moonrise:11:16 AM Moonset: 08:40 PM Moon Phase ( Waxing Crescent ) |
|
| 14 November 2026 Saturday |  Cloudy |
9.1 ° C (48.4°F) |
15.7 ° C (60.2°F) |
12.7 ° C (54.9°F) |
% 65 | 75% | 4 | Sunrise:06:48 AM Sunset: 04:57 PM |
Moonrise:11:53 AM Moonset: 09:42 PM Moon Phase ( First Quarter ) |
|
| 15 November 2026 Sunday | Patchy rain nearby |
10 ° C (50°F) |
14.1 ° C (57.4°F) |
12.4 ° C (54.3°F) |
% 62 | 68% | 3 | Sunrise:06:49 AM Sunset: 04:56 PM |
Moonrise:12:24 PM Moonset: 10:42 PM Moon Phase ( First Quarter ) |
|
| 16 November 2026 Monday | Partly Cloudy |
8.5 ° C (47.3°F) |
15.7 ° C (60.3°F) |
12.1 ° C (53.8°F) |
% 61 | 69% | 4 | Sunrise:06:50 AM Sunset: 04:56 PM |
Moonrise:12:50 PM Moonset: 11:42 PM Moon Phase ( First Quarter ) |
|
| 17 November 2026 Tuesday | Cloudy |
10.2 ° C (50.3°F) |
15 ° C (59°F) |
12.8 ° C (55.1°F) |
% 77 | 71% | 4 | Sunrise:06:51 AM Sunset: 04:55 PM |
Moonrise:01:14 PM Moonset: Does not set today Moon Phase ( First Quarter ) |
|
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