Simi Valley Weather Forecast 15 Days, Weather in Simi Valley Today
Current weather conditions and 15 day weather forecast for Simi Valley, 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 Simi Valley
| 18 December 2025 Thursday 17.8 ° C / 64°F  Clear |
Feels Like : 17.8 ° C / 64°F Humidity : % 58 Pressure : 1015 mb Wind Speed : 11.9 kmph / 7.4 miles from NNE  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Simi Valley, CA, USA
Weather Forecast for next 15 Days for Simi Valley 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 Simi Valley, 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 | Sunny |
10.4 ° C (50.7°F) |
23.6 ° C (74.5°F) |
16.4 ° C (61.6°F) |
% 71 | 0% | 0.7 | Sunrise:06:55 AM Sunset: 04:48 PM |
Moonrise:05:02 AM Moonset: 02:51 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday | Sunny |
12.9 ° C (55.2°F) |
30.2 ° C (86.4°F) |
20 ° C (68°F) |
% 36 | 0% | 0.6 | Sunrise:06:56 AM Sunset: 04:48 PM |
Moonrise:06:00 AM Moonset: 03:34 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday | Sunny |
11.5 ° C (52.7°F) |
22.4 ° C (72.3°F) |
16.3 ° C (61.4°F) |
% 62 | 0% | 0.6 | Sunrise:06:56 AM Sunset: 04:48 PM |
Moonrise:06:56 AM Moonset: 04:23 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Sunny |
9.1 ° C (48.4°F) |
23.7 ° C (74.7°F) |
15.4 ° C (59.7°F) |
% 63 | 0% | 0.6 | Sunrise:06:57 AM Sunset: 04:49 PM |
Moonrise:07:48 AM Moonset: 05:19 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Sunny |
11.8 ° C (53.3°F) |
19.7 ° C (67.5°F) |
14.9 ° C (58.7°F) |
% 69 | 0% | 0.5 | Sunrise:06:58 AM Sunset: 04:49 PM |
Moonrise:08:33 AM Moonset: 06:18 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Sunny |
11.8 ° C (53.3°F) |
21.5 ° C (70.7°F) |
14.7 ° C (58.5°F) |
% 70 | 0% | 0 | Sunrise:06:58 AM Sunset: 04:50 PM |
Moonrise:09:13 AM Moonset: 07:21 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday |  Patchy rain nearby |
13.3 ° C (56°F) |
19.1 ° C (66.4°F) |
15.4 ° C (59.8°F) |
% 75 | 83% | 4 | Sunrise:06:58 AM Sunset: 04:50 PM |
Moonrise:09:47 AM Moonset: 08:23 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday |  Moderate rain |
13.7 ° C (56.7°F) |
14.5 ° C (58.1°F) |
14.3 ° C (57.8°F) |
% 93 | 88% | 3 | Sunrise:06:59 AM Sunset: 04:51 PM |
Moonrise:10:17 AM Moonset: 09:25 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Moderate rain |
10.1 ° C (50.3°F) |
13.9 ° C (57.1°F) |
13 ° C (55.4°F) |
% 84 | 87% | 3 | Sunrise:06:59 AM Sunset: 04:52 PM |
Moonrise:10:44 AM Moonset: 10:27 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Moderate rain |
8.8 ° C (47.9°F) |
13.7 ° C (56.7°F) |
10.7 ° C (51.3°F) |
% 83 | 80% | 3 | Sunrise:07:00 AM Sunset: 04:52 PM |
Moonrise:11:11 AM Moonset: 11:30 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Patchy rain nearby |
6.3 ° C (43.4°F) |
12.7 ° C (54.8°F) |
8.9 ° C (48.1°F) |
% 78 | 85% | 2 | Sunrise:07:00 AM Sunset: 04:53 PM |
Moonrise:11:38 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Sunny |
5.4 ° C (41.7°F) |
13.3 ° C (55.9°F) |
8.7 ° C (47.6°F) |
% 66 | 0% | 3 | Sunrise:07:00 AM Sunset: 04:54 PM |
Moonrise:12:06 PM Moonset: 12:35 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday | Sunny |
6.2 ° C (43.2°F) |
14.2 ° C (57.6°F) |
9.6 ° C (49.2°F) |
% 59 | 0% | 3 | Sunrise:07:01 AM Sunset: 04:54 PM |
Moonrise:12:39 PM Moonset: 01:44 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Sunny |
7.7 ° C (45.8°F) |
18.2 ° C (64.7°F) |
11.7 ° C (53.1°F) |
% 56 | 0% | 4 | Sunrise:07:01 AM Sunset: 04:55 PM |
Moonrise:01:18 PM Moonset: 02:56 AM Moon Phase ( Waxing Gibbous ) |
|
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