– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Fri 12 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Fri 12 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 35mm), heaviest during Sun night. Very mild (max 14°C on Sat morning, min 7°C on Mon afternoon). Winds increasing (calm on Fri night, strong winds from the SW by Mon afternoon).										Days 5–7 Weather Summary Heavy rain (total 94mm), heaviest during Tue night. Later becoming colder with a dusting of snow on Thu afternoon. Mild temperatures (max 9°C on Tue morning, min 1°C on Tue night). Winds increasing (light winds from the SSW on Mon night, strong winds from the SW by Tue night).
		Saturday 13			Sunday 14			Monday 15			Tuesday 16			Wednesday 17			Thursday 18
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	clear	cloudy	light rain	cloudy	some clouds	heavy rain	mod. rain	rain shwrs	mod. rain	mod. rain	rain shwrs	light snow	light rain	mod. rain	heavy rain	heavy rain	light snow	light snow
km/h	SW	SSW	SSW	SSW	S	SSW	S	SW	SW	SW	SW	SW	SW	WSW	WSW	SSW	SSW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	1	—	—	—	—	3	4
mm	0.5	—	—	2	—	—	20	9	4	8	8	12	30	3	5	18	10	—	—
max°C	9	14	13	10	11	10	11	12	10	6	9	9	6	3	3	4	4	1	1
min°C	9	12	12	8	10	10	10	12	7	5	7	7	1	2	3	3	3	1	1
chill°C	8	11	11	6	9	9	8	10	3	1	4	4	-6	-4	-2	-1	-4	-5	-4

Freezing level (m)	3450	3200	3050	2400	2400	2300	2600	2850	1950	1300	1850	1750	1100	800	900	1000	1150	650	700
Cloud base (m)	750	9200			700	2750	750	400	450	400	400	400	350	450	400	400	350	350	400

	—	7:46	—	—	7:47	—	—	7:48	—	—	7:48	—	—	7:48	—	—	7:50	—	—
	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:16	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 35mm), heaviest during Sun night. Very mild (max 14°C on Sat morning, min 7°C on Mon afternoon). Winds increasing (calm on Fri night, strong winds from the SW by Mon afternoon).

Mount Si Weather (Days 3-6):

Heavy rain (total 94mm), heaviest during Tue night. Later becoming colder with a dusting of snow on Thu afternoon. Mild temperatures (max 9°C on Tue morning, min 1°C on Tue night). Winds increasing (light winds from the SSW on Mon night, strong winds from the SW by Tue 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. 58 minutes ago	9° C	Dry	Calm (0 kph at 219).
Black Diamond 32 km SSW 192m alt. 55 minutes ago	8° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	10° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: few Mid: scattered
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 143).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	Fog -.	Light winds from the N (7 kph at 1).	0 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	11° C	Dry and cloudy.	Light winds from the SE (9 kph at 140).	16 km Low: broken Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	10° C	Dry and cloudy.	Light winds from the SSE (6 kph at 150).	16 km Low: scattered Mid: overcast
Snohomish 49 km NW 196m alt. 39 minutes ago	7° C	Dry	Calm (0 kph at 300).
Seattle 49 km WSW 100m alt. 52 minutes ago	14° C	-
SHIP7088 50 km WSW 3m alt. 3 hours ago	12° C

* 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.