– Lat/Long: 38.67° N 122.63° W

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

Issued: 3 am Sun 21 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Saint Helena Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 116mm), heaviest during Tue night. Mild temperatures (max 9°C on Sun morning, min 2°C on Tue night). Winds decreasing (severe gales from the SW on Sun morning, moderate winds from the SW by Mon morning).									Days 4–6 Weather Summary Mild with heavy rain (total 30mm), heaviest during Wed night. Becoming colder with a moderate fall of snow heaviest on Thu night. Temperatures will be slightly above freezing (max 3°C on Wed afternoon, min 1°C on Wed night). Winds decreasing (extremely windy from the S on Wed night, calm by Fri night).
	Sunday 21			Monday 22			Tuesday 23			Wednesday 24			Thursday 25			Friday 26
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy rain	heavy rain	mod. rain	light rain	light rain	mod. rain	mod. rain	heavy rain	heavy rain	rain shwrs	light rain	light snow	light snow	light snow	mod. snow	snow shwrs	light rain	snow shwrs
km/h	SW	SW	SW	SW	SW	SSW	S	SSE	WSW	SSW	S	S	SSW	SSW	SW	SSW	SSW	S
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	1	2	2	6	1	—	2
mm	20	22	7	0.3	5	9	5	14	34	0.2	4	24	—	—	—	—	0.5	0.7
max °C	9	9	7	6	6	6	5	5	6	2	3	3	1	1	1	2	2	2
min °C	8	8	6	6	6	5	5	5	2	2	3	1	1	1	1	1	2	1
chill °C	2	2	2	2	2	0	-1	-2	-4	-4	-5	-8	-7	-7	-8	-6	-4	1

Freezing level m	2850	2900	2650	2650	2500	2350	2300	2200	2000	1750	1750	1950	1450	1450	1450	1550	1550	1600
Cloud base (m)	350	350	450	500	800	350	350	300	350	350	450	350	450	350	350	550	500	350

	7:24	—	—	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 116mm), heaviest during Tue night. Mild temperatures (max 9°C on Sun morning, min 2°C on Tue night). Winds decreasing (severe gales from the SW on Sun morning, moderate winds from the SW by Mon morning).

Mount Saint Helena Weather (Days 3-6):

Mild with heavy rain (total 30mm), heaviest during Wed night. Becoming colder with a moderate fall of snow heaviest on Thu night. Temperatures will be slightly above freezing (max 3°C on Wed afternoon, min 1°C on Wed night). 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 winds from the S (24 kph at 190).	0.0 km
Santa Rosa 30 km S 40m alt. 1 hour ago	16° C	Dry	Calm (0 kph at 108).
Cloverdale 34 km W 106m alt. 1 hour ago	15° C	Dry	Wind obs. (8 kph from 124 degs) was rejected.
Graton 35 km SSW 87m alt. 1 hour ago	14° C	Dry	Wind obs. (8 kph from 34 degs) was rejected.
Alten wx 36 km S 69m alt. 1 hour ago	15° C	Dry	Calm (0 kph at 99).
Sebastopol 36 km SSW 129m alt. 1 hour ago	14° C	Dry	Light winds from the SW (8 kph at 223).
Guerneville wx 36 km SW 18m alt. 1 hour ago		-	Calm (0 kph at 122).
Camp Meeker wx 37 km SSW 61m alt. 1 hour ago	14° C	Light rain.	Wind obs. (13 kph from 248 degs) was rejected.
Camp Meeker wx 37 km SSW 61m alt. 2 hours ago	13° C	Light rain.	Wind obs. (13 kph from 323 degs) was rejected.
Knowles Corner wx 37 km S 88m alt. 1 hour ago	15° C	Dry	Calm (3 kph at 23).

* 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.