– Lat/Long: 38.67° N 122.63° W

Mount Saint Helena Weather Forecast

Mayacmas Mountains · United States

Issued: 10 pm Fri 18 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Fri 18 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Saint Helena Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Warm (max 21°C on Mon afternoon, min 18°C on Fri night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 23°C on Tue afternoon, min 20°C on Mon night). Wind will be generally light.
		Saturday 19			Sunday 20			Monday 21			Tuesday 22			Wednesday 23
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	some clouds	cloudy	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)		9050	9250	9300	6950	6350	6200	6400							9700	9200
km/h	NE	NNE	W	NNE	ESE	SSE	ENE	ESE	NW	NNW	NNW	WNW	W	SW	W	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	18	19	20	20	19	19	19	19	21	21	21	23	22	22	23	22
min °C	18	18	20	19	18	19	18	18	20	20	20	21	21	21	22	21
chill °C	18	18	20	19	18	19	18	18	20	20	20	21	21	21	22	21

Freezing level m	4200	4300	4400	4300	4250	4150	4100	4050	4200	4250	4350	4400	4400	4400	4450	4450

	—	6:54	—	—	6:56	—	—	6:56	—	—	6:56	—	—	6:58	—	—
	—	—	7:12	—	—	7:10	—	—	7:08	—	—	7:07	—	—	7:06	—

Mount Saint Helena Weather (Days 0-3):

The weather forecast for Mount Saint Helena is: Mostly dry. Warm (max 21°C on Mon afternoon, min 18°C on Fri night). Wind will be generally light.

Mount Saint Helena Weather (Days 3-6):

Mostly dry. Warm (max 23°C on Tue afternoon, min 20°C on Mon night). Wind will be generally light.

This table gives the weather forecast for Mount Saint Helena at the specific elevation of 1323 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of Mount Saint Helena. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of California.

Live conditions reported by 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Santa Rosa Airport 25 km SSW 219m alt. 3 hours ago	15°C	Clear	Light winds from the S (7 kph at 170).	16 km
Cloverdale 34 km W 106m alt. 3 hours ago	23°C	Dry	Calm (2 kph at 15).
Graton 35 km SSW 87m alt. 2 hours ago	13°C	Dry	Calm (0 kph at 34).
Alten wx 36 km S 69m alt. 2 hours ago	13°C	Dry	Calm (0 kph at 98).
Sebastopol 36 km SSW 129m alt. 2 hours ago	14°C	Dry	Calm (0 kph at 209).
Camp Meeker wx 37 km SSW 61m alt. 1 hour ago	13°C	Dry	Calm (0 kph at 225).
Camp Meeker wx 37 km SSW 61m alt. 2 hours ago	13°C	Dry	Calm (0 kph at 308).
Knowles Corner wx 37 km S 88m alt. 2 hours ago	15°C	Dry	Calm (0 kph at —).
Camp Meeker wx 39 km SSW 61m alt. 2 hours ago	14°C	Dry	Calm (0 kph at 5).
Monte Rio wx 40 km SSW 76m alt. 2 hours ago	13°C	Dry	Calm (0 kph at 359).

* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.