– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Thu 09 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Thu 09 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mild with light rain (total 3mm) on Sat morning Becoming colder with a light covering of snow, mostly falling on Sat morning. Very mild (max 11°C on Thu night, min 2°C on Sat morning). Wind will be generally light.										Days 5–7 Weather Summary A heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 2°C on Sun night, min -5°C on Tue night). Winds decreasing (gales from the SSW on Tue night, light winds from the WNW by Wed afternoon).
		Friday 10			Saturday 11			Sunday 12			Monday 13			Tuesday 14			Wednesday 15
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	cloudy	some clouds	rain shwrs	light snow	light snow	some clouds	light rain	rain shwrs	light snow	cloudy	light snow	cloudy	light snow	light snow	snow shwrs	light snow	snow shwrs	some clouds
km/h	SE	SE	NW	NW	SW	SW	SSW	W	W	SW	SW	WSW	SW	SW	SSW	SW	WSW	WNW	NNW
See all weather maps
cm	—	—	—	—	3	2	—	—	—	1	—	1	—	1	2	10	3	4	—
mm	—	—	—	0.3	1	0.2	—	0.2	0.9	0.6	—	—	—	—	—	—	—	—	—
max °C	11	10	10	9	4	2	3	2	3	2	-1	0	-1	-1	-1	0	-4	-3	-4
min °C	10	10	10	6	2	2	2	2	2	-1	-2	0	-2	-2	-1	-5	-5	-3	-5
chill °C	8	10	10	5	-4	-2	-1	2	0	-8	-10	-6	-9	-9	-9	-14	-14	-10	-9

Freezing level m	2800	2700	2700	2450	1700	1750	1800	1700	1700	1250	1150	1300	950	1100	1150	550	750	850	0
Cloud base (m)	9200	3200	2900	1650	400	400	750	550	500	400	450	400	600	450	400	550	450	450	850

	—	6:28	—	—	6:26	—	—	6:24	—	—	6:22	—	—	6:20	—	—	6:18	—	—
	—	—	7:49	—	—	7:50	—	—	7:51	—	—	7:52	—	—	7:53	—	—	7:55	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mild with light rain (total 3mm) on Sat morning Becoming colder with a light covering of snow, mostly falling on Sat morning. Very mild (max 11°C on Thu night, min 2°C on Sat morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

A heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 2°C on Sun night, min -5°C on Tue night). Winds decreasing (gales from the SSW on Tue night, light winds from the WNW by Wed afternoon).

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. 1 hour ago	6° C	Dry	Calm (0 kph at 354).
Snoqualmie Pass 30 km ESE 824m alt. 39 minutes ago	-2° C	-	Calm (0 kph at 358).
Renton 30 km WSW 160m alt. 2 hours ago	7° C	Dry	Calm (0 kph at 38).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 31 minutes ago	8° C	Dry	Calm (5 kph at 52).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Clear	Calm (0 kph at 0).	16 km
Grotto wx 39 km NE 1101m alt. 44 minutes ago	4° C	Dry	Calm (2 kph at 30).
Auburn 39 km SW 119m alt. 42 minutes ago	7° C	Dry	Calm (0 kph at 242).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	3° C	Clear	Wind obs. (6 kph from 20 degs) was rejected.	16 km
Woodinville 43 km WNW 137.2m alt. 1 hour ago	-2° C	-	Calm (0 kph at 328).

* 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.