– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Mon 12 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Mon 12 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Some drizzle, heaviest during Mon night. Freeze-thaw conditions (max 5°C on Tue afternoon, min 0°C on Wed night). Wind will be generally light.										Days 5–7 Weather Summary A dusting of snow giving way to moderate rain (total 12mm) heaviest on Sat morning. Mild temperatures (max 5°C on Sun afternoon, min 1°C on Thu night). Wind will be generally light.
		Tuesday 13			Wednesday 14			Thursday 15			Friday 16			Saturday 17			Sunday 18
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	some clouds	light rain	rain shwrs	cloudy	light rain	rain shwrs	cloudy	cloudy	light snow	light rain	light rain	light rain	light rain	light rain	rain shwrs	light rain	light rain	rain shwrs
km/h	NW	W	WSW	SSW	SW	SW	W	WSW	SW	W	WSW	SW	SSW	W	NW	NW	WNW	W	W
See all weather maps
cm	—	—	—	—	—	—	—	—	—	1.0	—	—	—	—	—	—	—	—	—
mm	0.4	—	0.3	0.4	—	0.1	0.1	—	—	—	0.5	0.3	3	5	2	0.1	0.4	0.6	0.3
max°C	4	3	5	4	2	2	2	1	1	1	2	4	4	3	3	4	3	5	5
min°C	3	3	4	2	1	1	0	0	1	1	2	3	3	3	3	3	3	4	3
chill°C	0	0	2	-3	-4	-5	-3	-2	-2	-2	-2	0	3	1	1	0	0	1	0

Freezing level (m)	1900	1900	2050	1600	1500	1600	1350	1400	1400	1450	1650	1950	1900	1750	1900	1900	2050	2250	2350
Cloud base (m)	1600	450	750	550	400	400	600	550	550	400	400	400	400	400	400	800	450	500	500

	—	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: Some drizzle, heaviest during Mon night. Freeze-thaw conditions (max 5°C on Tue afternoon, min 0°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

A dusting of snow giving way to moderate rain (total 12mm) heaviest on Sat morning. Mild temperatures (max 5°C on Sun afternoon, min 1°C on Thu night). 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 14).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	12° C	Clear	Light winds from the S (9 kph at 190).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	18° C	Dry	Calm (2 kph at 291).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	3° C	Fog -.	Wind obs. (7 kph from 230 degs) was rejected.	1 km Low: scattered Mid: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	11° C	-	Light winds from the S (11 kph at 180).	16 km Low: few
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	9° C	-	Light winds from the SSW (11 kph at 210).	16 km Low: few
Seattle 49 km WSW 100m alt. 3 hours ago		-	Moderate winds from the SW (23 kph at 221).
BUOY-WPOW1 55 km W 3m alt. 2 hours ago	10° C		Moderate winds from the S (26 kph at 190).
Puyallup 57 km SSW 160m alt. 2 hours ago	8° C	Dry	Calm (0 kph at 210).

* 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.