– Lat/Long: 38.67° N 122.63° W

Mount Saint Helena
Weather Forecast, United States
Issued: 3 pm Sun 21 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Sun 21 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Saint Helena Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 94mm), heaviest during Sun afternoon. Mild temperatures (max 8°C on Sun afternoon, min 1°C on Tue night). Winds increasing (light winds from the SSW on Mon afternoon, stormy winds from the SSE by Tue night).											Days 5–7 Weather Summary Heavy rain (total 34mm) on Wed night. Becoming colder with heavy fall of snow, heaviest during Thu night. Temperatures will be slightly above freezing (max 3°C on Wed afternoon, min 1°C on Thu morning). Winds decreasing (extremely windy from the S on Wed night, calm by Fri night).
	Sun 21		Monday 22			Tuesday 23			Wednesday 24			Thursday 25			Friday 26
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy rain	heavy rain	rain shwrs	light rain	mod. rain	light rain	light rain	rain shwrs	rain shwrs	mod. rain	light snow	light snow	mod. snow	mod. snow	light snow	snow shwrs	clear
km/h	SW	SW	SSW	SSW	SSW	S	SSE	SSW	SSW	SSE	S	SW	SSW	SSW	SW	WSW	WNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	1	2	6	7	3	1	—
mm	28	18	0.5	3	7	1.3	1.9	34	0.1	6	19	—	—	9	—	—	—
max °C	8	8	7	7	7	5	5	7	2	3	3	1	1	3	2	2	1
min °C	8	7	7	7	6	5	5	1	1	3	2	1	1	1	1	1	1
chill °C	2	3	3	5	2	-1	-2	-6	-5	-4	-7	-8	-7	-6	-6	-4	-3

Freezing level m	2850	2800	2650	2500	2500	2500	2250	2500	1500	1800	1950	1400	1550	1800	1550	1550	1500
Cloud base (m)	350	350	400	550	350	350	300	300	400	550	450	450	500	350	350	400	2450

	—	—	7:24	—	—	7:24	—	—	7:26	—	—	7:26	—	—	7:26	—	—
	4:52	—	—	4:52	—	—	4:52	—	—	4:53	—	—	4:53	—	—	4:54	—

Mount Saint Helena Weather (Days 0-3):

The weather forecast for Mount Saint Helena is: Heavy rain (total 94mm), heaviest during Sun afternoon. Mild temperatures (max 8°C on Sun afternoon, min 1°C on Tue night). Winds increasing (light winds from the SSW on Mon afternoon, stormy winds from the SSE by Tue night).

Mount Saint Helena Weather (Days 3-6):

Heavy rain (total 34mm) on Wed night. Becoming colder with heavy fall of snow, heaviest during Thu night. Temperatures will be slightly above freezing (max 3°C on Wed afternoon, min 1°C on Thu morning). Winds decreasing (extremely windy from the S on Wed night, calm by Fri night).

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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Santa Rosa Airport 25 km SSW 219m alt. 2 hours ago	15° C	Moderate rain .	Light winds from the S (13 kph at 170).	8 km Mid: overcast
Santa Rosa 30 km S 40m alt. 1 hour ago	15° C	Light rain.	Wind obs. (13 kph from 117 degs) was rejected.
Cloverdale 34 km W 106m alt. 37 minutes ago	15° C	Dry	Wind obs. (8 kph from 127 degs) was rejected.
Graton 35 km SSW 87m alt. 1 hour ago	14° C	Dry	Calm (3 kph at 32).
Alten wx 36 km S 69m alt. 2 hours ago	14° C	Dry	Calm (0 kph at 120).
Sebastopol 36 km SSW 129m alt. 41 minutes ago	14° C	Dry	Wind obs. (10 kph from 163 degs) was rejected.
Guerneville wx 36 km SW 18m alt. 35 minutes ago		-	Calm (0 kph at 100).
Camp Meeker wx 37 km SSW 61m alt. 2 hours ago	14° C	Light rain.	Light winds from the SSW (18 kph at 203).
Camp Meeker wx 37 km SSW 61m alt. 1 hour ago	13° C	Light rain.	Wind obs. (10 kph from 249 degs) was rejected.
Knowles Corner wx 37 km S 88m alt. 37 minutes ago	14° C	Light rain.	Calm (3 kph at 68).

* 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.