– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Wed 13 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Wed 13 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 23mm), mostly on Wed afternoon. Becoming colder with a light covering of snow ,mostly falling on Thu night. Freeze-thaw conditions (max 5°C on Wed afternoon, min -1°C on Fri night). Winds decreasing (near gales from the SW on Wed afternoon, moderate winds from the WSW by Thu morning).									Days 4–6 Weather Summary A light covering of new snow mostly falling on Sat afternoon. Freeze-thaw conditions (max 5°C on Mon afternoon, min -1°C on Sat morning). Winds decreasing (strong winds from the SW on Sat morning, calm by Sun afternoon).
	Wednesday 13			Thursday 14			Friday 15			Saturday 16			Sunday 17			Monday 18
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy rain	mod. rain	rain shwrs	light rain	light rain	snow shwrs	some clouds	light snow	snow shwrs	light snow	light snow	snow shwrs	some clouds	rain shwrs	some clouds	some clouds	rain shwrs	clear
km/h	WSW	WSW	WSW	WSW	W	WSW	SW	WSW	SW	SW	NNW	NW	WNW	W	NW	NNW	NW	NNW
See all weather maps
cm	—	—	—	—	—	4	—	1	4	2	3	2	—	—	—	—	—	—
mm	11	10	0.8	0.5	1	—	—	—	—	—	—	—	—	0.1	—	—	0.1	—
max °C	3	5	3	2	5	2	0	1	1	-1	1	0	0	2	3	3	5	4
min °C	3	4	1	1	3	1	0	1	-1	-1	0	-1	-1	1	1	1	5	3
chill °C	-2	-3	-6	-5	-2	-6	-6	-4	-9	-9	-6	-6	-3	0	1	-1	2	0

Freezing level m	1800	2000	1450	1650	1700	1500	1300	1400	1150	1200	1350	1050	1200	1550	1500	1600	1950	2250
Cloud base (m)	500	400	650	500	900	450	750	600	500	500	400	800	450	800	1650	950	1950

	5:31	—	—	5:31	—	—	5:30	—	—	5:28	—	—	5:26	—	—	5:26	—	—
	—	—	8:34	—	—	8:35	—	—	8:37	—	—	8:37	—	—	8:38	—	—	8:39

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 23mm), mostly on Wed afternoon. Becoming colder with a light covering of snow ,mostly falling on Thu night. Freeze-thaw conditions (max 5°C on Wed afternoon, min -1°C on Fri night). Winds decreasing (near gales from the SW on Wed afternoon, moderate winds from the WSW by Thu morning).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Sat afternoon. Freeze-thaw conditions (max 5°C on Mon afternoon, min -1°C on Sat morning). Winds decreasing (strong winds from the SW on Sat morning, calm by Sun 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. 35 minutes ago	11° C	Dry	Calm (0 kph at 28).
Renton 30 km WSW 160m alt. 1 hour ago	10° C	Light rain.	Calm (0 kph at 143).
Black Diamond 32 km SSW 192m alt. 51 minutes ago		-	Wind obs. (10 kph from 313 degs) was rejected.
Grotto wx 35 km NE 321m alt. 48 minutes ago	9° C	Dry	Light winds from the W (11 kph at 259).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Light rain .	Light winds from the S (11 kph at 190).	11 km Low: few Mid: broken High: overcast
Grotto wx 39 km NE 1101m alt. 42 minutes ago	4° C	Dry	Calm (2 kph at 76).
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 202).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	Light rain .	Light winds from the W.(Wind varies from 210 to 350 degs) (13 kph at 280).	1 km Mid: scattered High: overcast
Woodinville 43 km WNW 137.2m alt. 50 minutes ago	8° C	Dry	Wind obs. (6 kph from 264 degs) was rejected.
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	12° C	Dry and cloudy.	Light winds from the SSE (13 kph at 150).	16 km Low: scattered Mid: broken High: overcast

* 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.