– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Tue 14 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Tue 14 Apr 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 Wed night. Temperatures will be below freezing (max 0°C on Tue afternoon, min -5°C on Tue night). Winds decreasing (gales from the SW on Tue night, light winds from the W by Thu morning).									Days 4–6 Weather Summary Mostly dry. Freeze-thaw conditions (max 13°C on Sun afternoon, min -3°C on Fri morning). Wind will be generally light.
	Tuesday 14			Wednesday 15			Thursday 16			Friday 17			Saturday 18			Sunday 19
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	mod. snow	light snow	light snow	heavy snow	some clouds	some clouds	snow shwrs	some clouds	some clouds	some clouds	clear	some clouds	some clouds	some clouds	some clouds	clear
km/h	SW	SSW	SW	SSW	WSW	NW	W	W	WSW	WNW	NNE	SE	SE	ESE	ESE	ESE	ENE	N
See all weather maps
cm	1	3	6	1	4	12	—	—	3	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	-1	0	0	-5	-3	-4	-4	-1	-2	-2	0	2	5	7	9	11	13	12
min °C	-1	0	-5	-5	-4	-5	-5	-2	-3	-3	-1	0	3	6	7	10	12	11
chill °C	-8	-8	-11	-10	-10	-11	-9	-5	-7	-3	-1	0	1	4	5	8	12	11

Freezing level m	1150	1200	650	650	800	600	800	1100	800	1000	1250	1700	2100	2450	2750	2950	2950	3100
Cloud base (m)	400	400	450	400	500	450	450	750	450	450	700	800	4350	6200	7000	6850	8900

	6:20	—	—	6:18	—	—	6:16	—	—	6:15	—	—	6:13	—	—	6:11	—	—
	—	7:53	—	—	7:55	—	—	7:57	—	—	7:58	—	—	—	8:00	—	—	8:00

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A heavy fall of snow, heaviest during Wed night. Temperatures will be below freezing (max 0°C on Tue afternoon, min -5°C on Tue night). Winds decreasing (gales from the SW on Tue night, light winds from the W by Thu morning).

Mount Si Weather (Days 3-6):

Mostly dry. Freeze-thaw conditions (max 13°C on Sun afternoon, min -3°C on Fri morning). Wind will be generally light.

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. 18 minutes ago	7° C	Dry	Wind obs. (14 kph from 11 degs) was rejected.
Snoqualmie Pass 30 km ESE 824m alt. 28 minutes ago	5° C	-	Calm (0 kph at 86).
Renton 30 km WSW 160m alt. 2 hours ago	7° C	Dry	Light winds from the SSE (8 kph at 167).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	5° C	Dry	Calm (0 kph at 213).
Renton Airport 36 km WSW 218m alt. 59 minutes ago	9° C	Light rain .	Moderate winds from the S (24 kph at 180).	8 km Low: few Mid: scattered High: overcast
Grotto wx 39 km NE 1101m alt. 35 minutes ago	1° C	-	Calm (5 kph at 200).
Auburn 39 km SW 119m alt. 48 minutes ago		-	Wind obs. (6 kph from 360 degs) was rejected.
Stampede Pass Airport 40 km SE 628m alt. 57 minutes ago	1° C	-	Light winds from the N (7 kph at 1).	0.0 km
Woodinville 43 km WNW 137.2m alt. 1 hour ago	6° C	Dry	Calm (3 kph at 302).

* 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.