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.
| 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 |
| 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 ) |
|