– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Fri 27 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Fri 27 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mild with light rain (total 2mm) on Sun afternoon Becoming colder with a light covering of snow, mostly falling on Sun night. Freeze-thaw conditions (max 12°C on Fri afternoon, min -2°C on Sun night). Wind will be generally light.									Days 4–6 Weather Summary Heavy rain (total 27mm), heaviest during Wed afternoon. Later becoming colder with a dusting of snow on Wed night. Freeze-thaw conditions (max 8°C on Tue afternoon, min -3°C on Mon night). Wind will be generally light.
	Friday 27			Saturday 28			Sunday 29			Monday 30			Tuesday 31			Wednesday 1
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	cloudy	cloudy	some clouds	light rain	rain shwrs	some clouds	light rain	mod. snow	some clouds	rain shwrs	some clouds	cloudy	cloudy	light rain	heavy rain	heavy rain	snow shwrs
km/h	ESE	NW	NW	WNW	WSW	SW	WSW	W	NW	WNW	N	E	SE	S	ESE	SE	SW	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	8	—	—	—	—	—	—	—	—	2
mm	—	—	—	—	0.1	0.2	—	2	—	—	0.4	—	—	—	0.8	13	11	1.7
max °C	10	12	6	7	9	5	4	5	0	0	3	-1	5	8	5	4	3	2
min °C	4	10	4	4	8	1	1	3	-2	-2	2	-3	0	6	2	2	3	1
chill °C	2	10	4	3	7	-2	-1	0	-6	-2	0	-5	-2	6	-2	-2	-1	1

Freezing level m	2150	2300	2050	1400	1400	750	1000	950	250	550	850	0	1200	1600	1100	1200	900	750
Cloud base (m)	7800	6100		2800	850	500	1600	650	600	500	800	650	2600	2600	850	400	400	450

	6:56	—	—	6:54	—	—	6:52	—	—	6:50	—	—	6:48	—	—	6:46	—	—
	—	7:29	—	—	7:30	—	—	7:31	—	—	7:32	—	—	7:34	—	—	7:36	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mild with light rain (total 2mm) on Sun afternoon Becoming colder with a light covering of snow, mostly falling on Sun night. Freeze-thaw conditions (max 12°C on Fri afternoon, min -2°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 27mm), heaviest during Wed afternoon. Later becoming colder with a dusting of snow on Wed night. Freeze-thaw conditions (max 8°C on Tue afternoon, min -3°C on Mon night). 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. 1 hour ago	9° C	Dry	Calm (0 kph at 351).
Renton 30 km WSW 160m alt. 1 hour ago	8° C	-	Calm (2 kph at 333).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 57).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Clear	Light winds from the N (13 kph at 0).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	19° C	Dry	Calm (5 kph at 208).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-1° C	Clear	Light winds from the N (6 kph at 1).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	8° C	Clear	Light winds from the WNW (7 kph at 290).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	7° C	Dry and partly cloudy.	Light winds from the N (15 kph at 10).	16 km Low: scattered
Snohomish 49 km NW 196m alt. 1 hour ago	8° C	Dry	Calm (5 kph at 74).
Seattle 49 km WSW 100m alt. 27 minutes ago		-	Wind obs. (14 kph from 154 degs) was rejected.

* 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.