– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Sat 21 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Sat 21 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A heavy fall of snow, heaviest during Sun night. Freeze-thaw conditions (max 2°C on Sat night, min -3°C on Tue afternoon). Winds decreasing (strong winds from the ESE on Sat night, calm by Mon night).										Days 5–7 Weather Summary A light covering of new snow mostly falling on Tue night. Temperatures will be below freezing (max -1°C on Thu afternoon, min -4°C on Tue night). Winds decreasing (strong winds from the SW on Tue night, light winds from the SW by Wed night).
		Sunday 22			Monday 23			Tuesday 24			Wednesday 25			Thursday 26			Friday 27
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	light snow	mod. snow	mod. snow	light snow	light snow	light snow	light snow	light snow	light snow	light snow	cloudy	cloudy	cloudy	some clouds	some clouds	some clouds	some clouds
km/h	ESE	SE	SSW	SW	SSW	W	N	SSW	WNW	WSW	WSW	WSW	SW	SW	SW	SW	SW	WSW	WSW
See all weather maps
cm	1	3	2	10	6	5	3	3	4	2	2	1	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	2	0	1	1	1	0	-1	-1	-3	-3	-3	-2	-2	-2	-1	-2	-1	-1	-3
min °C	1	-1	1	0	0	-1	-1	-2	-3	-4	-3	-2	-3	-2	-1	-3	-3	-2	-4
chill °C	-7	-4	-5	-4	-3	-4	-1	-6	-8	-13	-10	-9	-10	-7	-6	-10	-10	-10	-8

Freezing level m	1600	1350	1400	1400	1450	1250	1050	1150	800	600	750	950	900	950	1100	900	900	1150	800
Cloud base (m)	2600	900	500	450	400	400	400	400	400	450	450	500	500	450	450	600	600	650	450

	—	6:58	—	—	6:58	—	—	6:56	—	—	6:54	—	—	6:52	—	—	6:50	—	—
	—	—	5:40	—	—	5:43	—	—	5:44	—	—	5:45	—	—	5:46	—	—	5:49	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Sun night. Freeze-thaw conditions (max 2°C on Sat night, min -3°C on Tue afternoon). Winds decreasing (strong winds from the ESE on Sat night, calm by Mon night).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Tue night. Temperatures will be below freezing (max -1°C on Thu afternoon, min -4°C on Tue night). Winds decreasing (strong winds from the SW on Tue night, light winds from the SW by Wed night).

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. 50 minutes ago	4° C	Dry	Calm (0 kph at 0).
Black Diamond 32 km SSW 192m alt. 57 minutes ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	10° C	Light rain .	Light winds from the N (11 kph at 1).	16 km Low: overcast
Auburn 39 km SW 119m alt. 2 hours ago	-6° C	-	Calm (0 kph at 42).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	6° C	Light rain .	Light winds from the NNW (7 kph at 330).	13 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	8° C	Light rain .	Wind obs. (9 kph from 110 degs) was rejected.	14 km Low: scattered Mid: overcast
Snohomish 49 km NW 196m alt. 2 hours ago	7° C	Dry	Wind obs. (10 kph from 26 degs) was rejected.
SHIP1227 54 km W -m alt. 3 hours ago	6° C	-	Calm (4 kph at 250).
SHIP3155 54 km W 15m alt. 2 hours ago			Calm (4 kph at 140).	- km
SHIP3178 54 km W 3m alt. 3 hours ago	6° C		Calm (4 kph at 170).

* 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.