– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Sat 13 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Sat 13 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 56mm), heaviest during Sun night. Very mild (max 13°C on Mon morning, min 5°C on Mon night). Winds increasing (light winds from the SSW on Sat night, strong winds from the SW by Mon afternoon).										Days 5–7 Weather Summary Heavy rain (total 51mm), mostly on Tue night. Becoming colder with a light covering of snow, mostly falling on Fri morning. Mild temperatures (max 7°C on Tue night, min 1°C on Tue night). Winds decreasing (near gales from the SW on Tue night, light winds from the SE by Wed night).
		Sunday 14			Monday 15			Tuesday 16			Wednesday 17			Thursday 18			Friday 19
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	light rain	cloudy	heavy rain	heavy rain	mod. rain	light rain	heavy rain	light rain	light snow	light rain	light rain	mod. rain	mod. rain	light rain	light snow	light snow	light snow	light snow
km/h	SSW	S	SW	S	SW	SW	WSW	S	SSW	SW	WSW	WSW	SSW	SE	SW	SW	WSW	SW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	1	—	—	—	—	—	2	4	2	1
mm	1.7	0.8	—	20	10	6	3	11	4	28	1.6	2	10	5	4	—	—	—	—
max°C	11	11	10	11	13	10	5	8	9	7	3	3	3	4	5	2	1	1	1
min°C	8	9	10	11	12	6	5	5	8	1	2	3	3	3	3	1	1	1	1
chill°C	6	8	9	9	10	2	1	3	4	-6	-4	-2	0	-1	-2	-4	-3	-4	-4

Freezing level (m)	2700	2150	2350	2750	3050	2050	1200	1500	1750	1250	750	900	1050	1150	1400	700	650	700	600
Cloud base (m)	4750	950	900	700	400	400	450	400	400	350	450	450	400	350	350	450	450	400	400

	—	7:47	—	—	7:48	—	—	7:48	—	—	7:48	—	—	7:50	—	—	7:50	—	—
	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:16	—	—	4:16	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 56mm), heaviest during Sun night. Very mild (max 13°C on Mon morning, min 5°C on Mon night). Winds increasing (light winds from the SSW on Sat night, strong winds from the SW by Mon afternoon).

Mount Si Weather (Days 3-6):

Heavy rain (total 51mm), mostly on Tue night. Becoming colder with a light covering of snow, mostly falling on Fri morning. Mild temperatures (max 7°C on Tue night, min 1°C on Tue night). Winds decreasing (near gales from the SW on Tue night, light winds from the SE by Wed night).

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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 41 minutes ago	11° C	Dry	Calm (0 kph at 110).
Black Diamond 32 km SSW 192m alt. 59 minutes ago	8° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	8° C	Clear	Light winds from the SSE (9 kph at 150).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	-4° C	-	Calm (0 kph at 138).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	7° C	Clear	Light winds from the E (6 kph at 90).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	9° C	Clear	Light winds from the SE (15 kph at 140).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	8° C	Dry and partly cloudy.	Light winds from the SSE (13 kph at 150).	16 km Low: scattered
Snohomish 49 km NW 196m alt. 53 minutes ago	9° C	Dry	Calm (0 kph at 352).
Seattle 49 km WSW 100m alt. 1 hour ago	12° C	-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	11° C		Moderate winds from the S (26 kph at 170).

* 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.