– 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. Freeze-thaw conditions (max 2°C on Thu morning, min -4°C on Sat night). Winds decreasing (fresh winds from the SW on Thu morning, calm by Thu night).									Days 4–6 Weather Summary A dusting of snow. Milder later with heavy rain (total 20mm) on Sun night. Freeze-thaw conditions (max 12°C on Tue afternoon, min -1°C on Sun morning). Wind will be generally light.
	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	mod. snow	mod. snow	light snow	light snow	light snow	light snow	light snow	some clouds	some clouds	light snow	light snow	light rain	mod. rain	rain shwrs	some clouds	light rain	light rain
km/h	WSW	SW	SW	W	WSW	W	NW	WNW	E	SSE	S	SW	SSW	SW	SSW	SW	SW	SW
See all weather maps
cm	2	8	10	5	1	3	3	1	—	—	1	2	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	0.1	7	3	6	3	—	0.2	0.1
max °C	2	1	0	1	1	0	-1	0	-3	2	3	3	5	6	7	9	12	8
min °C	1	1	0	1	1	-1	-1	-1	-4	-1	1	1	4	5	6	7	11	8
chill °C	-4	-3	-3	1	-1	-4	-4	-4	-4	-1	-1	0	2	3	4	5	10	6

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. Freeze-thaw conditions (max 2°C on Thu morning, min -4°C on Sat night). Winds decreasing (fresh winds from the SW on Thu morning, calm by Thu night).

Mount Si Weather (Days 3-6):

A dusting of snow. Milder later with heavy rain (total 20mm) on Sun night. Freeze-thaw conditions (max 12°C on Tue afternoon, min -1°C on Sun morning). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 500 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. 51 minutes ago	6° C	Dry	Calm (0 kph at 353).
Grotto wx 35 km NE 321m alt. 2 hours ago	2° C	-	Light winds from the W (8 kph at 276).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Clear	Moderate winds from the S (26 kph at 190).	16 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	-1° C	-	Wind obs. (8 kph from 216 degs) was rejected.
Auburn 39 km SW 119m alt. 2 hours ago	-2° C	-	Calm (0 kph at 101).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-2° C	Light snow.	Light winds from the W.(Wind varies from 210 to 020 degs) (15 kph at 280).	1 km
SHIP9471 43 km W 15m alt. 2 hours ago			Light winds from the SSW (17 kph at 200).	- km
SHIP5402 43 km W 3m alt. 2 hours ago	8° C		Light winds from the SSW (17 kph at 210).
SHIP9832 43 km W 15m alt. 3 hours ago			Light winds from the SW (10 kph at 220).	- km
SHIP7289 43 km W 3m alt. 3 hours ago	8° C		Light winds from the SW (9 kph at 220).

* 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.