St. Helena Weather Forecast 15 Days, Weather in St. Helena Today
Current weather conditions and 15 day weather forecast for St. Helena, 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 St. Helena
| 27 March 2026 Friday 26.7 ° C / 80.1°F  Sunny |
Feels Like : 25 ° C / 77°F Humidity : % 22 Pressure : 1015 mb Wind Speed : 3.6 kmph / 2.2 miles from ENE  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for St. Helena, CA, USA
Weather Forecast for next 15 Days for St. Helena 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 St. Helena, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 27 March 2026 Friday | Sunny |
11.1 ° C (52°F) |
30.9 ° C (87.6°F) |
20.5 ° C (68.9°F) |
% 31 | 0% | 1.4 | Sunrise:07:02 AM Sunset: 07:29 PM |
Moonrise:02:01 PM Moonset: 04:16 AM Moon Phase ( Waxing Gibbous ) |
|
| 28 March 2026 Saturday | Sunny |
11.5 ° C (52.7°F) |
25.9 ° C (78.6°F) |
18 ° C (64.4°F) |
% 64 | 0% | 1.7 | Sunrise:07:01 AM Sunset: 07:30 PM |
Moonrise:03:13 PM Moonset: 04:52 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 March 2026 Sunday |  Mist |
11.8 ° C (53.2°F) |
24.8 ° C (76.6°F) |
17.4 ° C (63.3°F) |
% 75 | 0% | 1.4 | Sunrise:06:59 AM Sunset: 07:31 PM |
Moonrise:04:21 PM Moonset: 05:22 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 March 2026 Monday |  Overcast |
8.9 ° C (48°F) |
22.2 ° C (72°F) |
15.9 ° C (60.6°F) |
% 57 | 0% | 1.2 | Sunrise:06:58 AM Sunset: 07:32 PM |
Moonrise:05:28 PM Moonset: 05:47 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 March 2026 Tuesday | Sunny |
3.6 ° C (38.5°F) |
17.4 ° C (63.4°F) |
9.7 ° C (49.4°F) |
% 64 | 0% | 1.3 | Sunrise:06:56 AM Sunset: 07:33 PM |
Moonrise:06:31 PM Moonset: 06:10 AM Moon Phase ( Waxing Gibbous ) |
|
| 01 April 2026 Wednesday |  Patchy rain nearby |
2.4 ° C (36.4°F) |
15.1 ° C (59.2°F) |
7.6 ° C (45.7°F) |
% 86 | 62% | 0 | Sunrise:06:54 AM Sunset: 07:34 PM |
Moonrise:07:35 PM Moonset: 06:32 AM Moon Phase ( Waxing Gibbous ) |
|
| 02 April 2026 Thursday | Sunny |
1.9 ° C (35.4°F) |
18.7 ° C (65.6°F) |
9.7 ° C (49.4°F) |
% 66 | 0% | 3 | Sunrise:06:53 AM Sunset: 07:35 PM |
Moonrise:08:37 PM Moonset: 06:55 AM Moon Phase ( Full Moon ) |
|
| 03 April 2026 Friday | Sunny |
7.4 ° C (45.3°F) |
22.8 ° C (73°F) |
13.4 ° C (56.2°F) |
% 32 | 0% | 4 | Sunrise:06:51 AM Sunset: 07:36 PM |
Moonrise:09:41 PM Moonset: 07:20 AM Moon Phase ( Waning Gibbous ) |
|
| 04 April 2026 Saturday | Sunny |
7 ° C (44.7°F) |
26.5 ° C (79.6°F) |
15.1 ° C (59.2°F) |
% 36 | 0% | 5 | Sunrise:06:50 AM Sunset: 07:37 PM |
Moonrise:10:43 PM Moonset: 07:47 AM Moon Phase ( Waning Gibbous ) |
|
| 05 April 2026 Sunday | Sunny |
8.3 ° C (47°F) |
25.8 ° C (78.5°F) |
15.4 ° C (59.7°F) |
% 48 | 0% | 5 | Sunrise:06:48 AM Sunset: 07:37 PM |
Moonrise:11:46 PM Moonset: 08:19 AM Moon Phase ( Waning Gibbous ) |
|
| 06 April 2026 Monday | Sunny |
6 ° C (42.7°F) |
24.1 ° C (75.4°F) |
13.1 ° C (55.6°F) |
% 58 | 0% | 4 | Sunrise:06:47 AM Sunset: 07:38 PM |
Moonrise:No moonrise Moonset: 08:57 AM Moon Phase ( Waning Gibbous ) |
|
| 07 April 2026 Tuesday | Sunny |
5.8 ° C (42.5°F) |
24.9 ° C (76.8°F) |
14.1 ° C (57.3°F) |
% 53 | 0% | 4 | Sunrise:06:45 AM Sunset: 07:39 PM |
Moonrise:12:44 AM Moonset: 09:41 AM Moon Phase ( Waning Gibbous ) |
|
| 08 April 2026 Wednesday |  Partly Cloudy |
6.7 ° C (44°F) |
23.2 ° C (73.7°F) |
13.9 ° C (57.1°F) |
% 59 | 0% | 4 | Sunrise:06:44 AM Sunset: 07:40 PM |
Moonrise:01:38 AM Moonset: 10:33 AM Moon Phase ( Waning Gibbous ) |
|
| 09 April 2026 Thursday | Sunny |
3.9 ° C (39°F) |
21.7 ° C (71°F) |
11.5 ° C (52.7°F) |
% 72 | 0% | 4 | Sunrise:06:42 AM Sunset: 07:41 PM |
Moonrise:02:25 AM Moonset: 11:31 AM Moon Phase ( Waning Gibbous ) |
|
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