– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Tue 24 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Tue 24 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mild with moderate rain (total 20mm) on Tue morning, Becoming colder with a light covering of snow, mostly falling on Wed afternoon. Freeze-thaw conditions (max 5°C on Tue morning, min -6°C on Wed night). Winds decreasing (gales from the SW on Tue afternoon, calm by Thu afternoon).									Days 4–6 Weather Summary A light covering of new snow mostly falling on Sun afternoon. Freeze-thaw conditions (max 4°C on Fri afternoon, min -6°C on Sun night). Winds increasing (calm on Fri night, fresh winds from the WSW by Sun morning).
	Tuesday 24			Wednesday 25			Thursday 26			Friday 27			Saturday 28			Sunday 29
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy rain	mod. rain	snow shwrs	some clouds	light snow	snow shwrs	some clouds	some clouds	clear	some clouds	cloudy	cloudy	cloudy	cloudy	some clouds	light snow	light snow	some clouds
km/h	SSW	SW	SW	SW	WSW	WSW	WSW	SW	ESE	ESE	ESE	SE	SW	SW	SW	W	W	NNW
See all weather maps
cm	—	—	1	—	4	3	—	—	—	—	—	—	—	—	—	2	5	—
mm	11	8	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	5	4	1	-2	-1	-5	-4	-1	0	3	4	4	3	2	1	-2	-4	-5
min °C	4	3	-2	-2	-4	-6	-6	-3	-2	1	4	3	3	2	-2	-3	-4	-6
chill °C	-2	-5	-9	-9	-14	-14	-13	-6	-2	-2	2	3	2	0	-9	-9	-8	-12

Freezing level m	2450	1850	1150	1050	800	450	800	1100	750	1800	2100	2250	1800	1450	1000	850	750	0
Cloud base (m)	400	450	450	450	700	450	600	950	450	5450	5600	6050	850	2900	850	450	400	450

	7:01	—	—	7:00	—	—	6:58	—	—	6:56	—	—	6:54	—	—	6:52	—	—
	—	7:23	—	—	7:25	—	—	7:27	—	—	7:29	—	—	7:30	—	—	7:31	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mild with moderate rain (total 20mm) on Tue morning, Becoming colder with a light covering of snow, mostly falling on Wed afternoon. Freeze-thaw conditions (max 5°C on Tue morning, min -6°C on Wed night). Winds decreasing (gales from the SW on Tue afternoon, calm by Thu afternoon).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Sun afternoon. Freeze-thaw conditions (max 4°C on Fri afternoon, min -6°C on Sun night). Winds increasing (calm on Fri night, fresh winds from the WSW by Sun morning).

This table gives the weather forecast for Mount Si at the specific elevation of 1270 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of Mount Si. 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 Washington.

Live conditions reported by 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 32 minutes ago	14° C	Dry	Calm (0 kph at 20).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (8 kph from 272 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 1 hour ago	13° C	Dry and cloudy.	Moderate winds from the S (24 kph at 190).	16 km Low: scattered Mid: broken High: overcast
Auburn 39 km SW 119m alt. 39 minutes ago		-	Calm (0 kph at 197).
Stampede Pass Airport 40 km SE 628m alt. 44 minutes ago	5° C	Light rain .	Light winds from the W.(Wind varies from 170 to 340 degs) (13 kph at 280).	16 km Low: few Mid: broken High: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13° C	Dry and cloudy.	Moderate winds from the SSW (24 kph at 200).	16 km Low: broken Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	12° C	Light rain .	Fresh winds from the SSW (35 kph at 200).	14 km Low: broken Mid: broken High: overcast
Snohomish 49 km NW 196m alt. 56 minutes ago	14° C	Dry	Light winds from the S (13 kph at 190).
Seattle 49 km WSW 100m alt. 1 hour ago	21° C	-	Calm (5 kph at 203).
SHIP7968 54 km W 3m alt. 3 hours ago

* 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.