– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Thu 08 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Thu 08 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A light covering of new snow mostly falling on Sat night. Becoming milder with light rain (total 6mm) on Sat night. Freeze-thaw conditions (max 5°C on Sat morning, min -4°C on Thu morning). Winds decreasing (strong winds from the WSW on Thu morning, light winds from the SW by Fri morning).									Days 4–6 Weather Summary Heavy rain (total 33mm), heaviest during Sun night. Very mild (max 11°C on Tue afternoon, min 4°C on Sun morning). Winds decreasing (near gales from the SW on Sun night, calm by Tue morning).
	Thursday 8			Friday 9			Saturday 10			Sunday 11			Monday 12			Tuesday 13
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	cloudy	some clouds	some clouds	cloudy	cloudy	cloudy	light snow	mod. rain	mod. rain	heavy rain	light rain	light rain	rain shwrs	some clouds	clear	clear
km/h	WSW	WSW	WSW	SW	SW	SW	SSW	SSW	SW	SSW	SSW	WSW	WSW	WSW	SW	ENE	SW	SW
See all weather maps
cm	1	2	—	—	—	—	—	—	2	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	6	6	7	17	2	0.1	0.3	—	—	—
max °C	-3	-2	-1	0	3	4	5	4	3	4	4	6	7	7	8	10	11	10
min °C	-4	-2	-2	-1	2	4	5	2	1	4	4	4	6	6	6	9	10	9
chill °C	-12	-10	-9	-6	-2	0	1	-4	-5	-1	-2	-2	1	2	2	9	10	8

Freezing level m	650	900	1000	1050	1800	2300	2200	2150	1900	2250	2300	2350	2500	2800	2950	3200	3550	3650
Cloud base (m)	450	450	550	450	500		2950	2650	450	450	450	450	550	450	550	600	450

	7:52	—	—	7:52	—	—	7:52	—	—	7:52	—	—	7:50	—	—	7:50	—	—
	—	4:34	—	—	4:35	—	—	4:36	—	—	4:37	—	—	4:38	—	—	4:39	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A light covering of new snow mostly falling on Sat night. Becoming milder with light rain (total 6mm) on Sat night. Freeze-thaw conditions (max 5°C on Sat morning, min -4°C on Thu morning). Winds decreasing (strong winds from the WSW on Thu morning, light winds from the SW by Fri morning).

Mount Si Weather (Days 3-6):

Heavy rain (total 33mm), heaviest during Sun night. Very mild (max 11°C on Tue afternoon, min 4°C on Sun morning). Winds decreasing (near gales from the SW on Sun night, calm by Tue 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	3° C	Dry	Calm (3 kph at 79).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Dry and cloudy.	Light winds from the S (13 kph at 180).	16 km Low: overcast
Auburn 39 km SW 119m alt. 2 hours ago	8° C	Dry	Calm (0 kph at 252).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-3° C	Light snow.	Light winds from the W.(Wind varies from 220 to 320 degs) (17 kph at 270).	0 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	7° C	Dry and cloudy.	Light winds from the SSE (19 kph at 160).	16 km Low: broken Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 1 hour ago	6° C	Dry and partly cloudy.	Moderate winds from the SSW (22 kph at 200).	16 km Low: scattered Mid: broken High: broken
Snohomish 49 km NW 196m alt. 2 hours ago	6° C	Dry	Light winds from the SSE (8 kph at 167).
Seattle 49 km WSW 100m alt. 1 hour ago		-	Wind obs. (13 kph from 130 degs) was rejected.
SHIP4213 54 km W 15m alt. 3 hours ago	10° C		Light winds from the S (19 kph at 180).	- km

* 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.