– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Thu 12 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Thu 12 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A heavy fall of snow, heaviest during Thu afternoon. Temperatures will be below freezing (max -3°C on Thu night, min -7°C on Sat morning). Winds decreasing (near gales from the WSW on Thu morning, light winds from the NNE by Sat night).									Days 4–6 Weather Summary A light covering of new snow mostly falling on Sun night. Becoming milder with moderate rain (total 11mm) heaviest on Mon afternoon. Freeze-thaw conditions (max 7°C on Tue morning, min -3°C on Sun morning). Winds increasing (calm on Sun morning, strong winds from the SW by Mon night).
	Thursday 12			Friday 13			Saturday 14			Sunday 15			Monday 16			Tuesday 17
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	heavy snow	heavy snow	mod. snow	light snow	light snow	light snow	light snow	some clouds	some clouds	light snow	mod. snow	light snow	mod. rain	rain shwrs	some clouds	light rain	light rain
km/h	WSW	WSW	SW	WSW	SW	W	NNW	NW	NNE	SSE	SW	SW	SW	WSW	SW	SW	SW	WSW
See all weather maps
cm	4	15	17	9	2	5	5	2	—	—	1	6	1	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	1.5	6	3	—	0.2	0.1
max °C	-4	-4	-3	-3	-3	-4	-7	-6	-5	-2	-2	0	3	5	6	7	7	7
min °C	-4	-4	-5	-3	-3	-6	-7	-7	-6	-3	-3	-2	2	3	5	7	7	6
chill °C	-14	-13	-12	-8	-8	-13	-14	-13	-10	-3	-7	-7	-5	-3	-1	2	2	1

Freezing level m	700	600	550	650	700	400	400	500	0	950	800	1300	2850	3300	3150	3050	3100	2800
Cloud base (m)	450	450	400	400	400	400	450	450	450	2200	650	450	450	450	450	450	400	1650

	7:26	—	—	7:24	—	—	7:22	—	—	7:20	—	—	7:18	—	—	7:16	—	—
	—	7:07	—	—	7:08	—	—	7:09	—	—	7:12	—	—	7:13	—	—	7:14	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Thu afternoon. Temperatures will be below freezing (max -3°C on Thu night, min -7°C on Sat morning). Winds decreasing (near gales from the WSW on Thu morning, light winds from the NNE by Sat night).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Sun night. Becoming milder with moderate rain (total 11mm) heaviest on Mon afternoon. Freeze-thaw conditions (max 7°C on Tue morning, min -3°C on Sun morning). Winds increasing (calm on Sun morning, strong winds from the SW by Mon 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. 23 minutes ago	7° C	Dry	Calm (0 kph at 351).
Grotto wx 35 km NE 321m alt. 50 minutes ago	1° C	-	Light winds from the W (10 kph at 278).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Dry and cloudy.	Light winds from the S (17 kph at 190).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	-3° C	-	Calm (5 kph at 61).
Auburn 39 km SW 119m alt. 1 hour ago	16° C	Dry	Calm (2 kph at 200).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-3° C	Light snow.	Light winds from the W (13 kph at 260).	0 km Mid: overcast
SHIP8929 43 km W 15m alt. 2 hours ago			Light winds from the SSW (15 kph at 200).	- km
SHIP7687 43 km W 15m alt. 3 hours ago			Light winds from the SSW (13 kph at 200).	- km
Woodinville 43 km WNW 137.2m alt. 1 hour ago	1° C	-	Wind obs. (6 kph from 309 degs) was rejected.
SHIP9254 43 km W 15m alt. 3 hours ago			Light winds from the SSW (13 kph at 200).	- 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.