– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 am Fri 20 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 3 am Fri 20 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 11mm), heaviest on Sun night. Mild temperatures (max 6°C on Sun morning, min 1°C on Fri morning). Wind will be generally light.									Days 4–6 Weather Summary Heavy rain (total 34mm), heaviest during Mon night. Later becoming colder with a dusting of snow on Tue night. Mild temperatures (max 5°C on Mon morning, min 1°C on Tue night). Wind will be generally light.
	Friday 20			Saturday 21			Sunday 22			Monday 23			Tuesday 24			Wednesday 25
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	light rain	some clouds	light rain	light rain	light rain	light rain	light rain	mod. rain	mod. rain	heavy rain	mod. rain	light rain	light rain	light snow	light rain	light rain	rain shwrs
km/h	SSW	SSW	ESE	ESE	ESE	ESE	SE	SE	S	ESE	SSE	SW	SW	SW	SW	SW	SW	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2	—	—	—
mm	—	0.1	—	0.2	0.9	0.2	1.2	2	6	7	10	9	1.7	3	1.3	0.6	0.9	0.4
max °C	2	3	1	5	5	4	6	6	3	5	5	4	4	3	2	3	3	2
min °C	1	1	1	4	3	3	6	3	3	4	5	2	2	3	1	2	3	2
chill °C	-1	1	-2	0	-2	-2	2	0	0	2	2	-2	-2	-1	-3	-1	1	-1

Freezing level m	600	800	650	1250	1300	1350	1700	1350	1000	1200	1850	1150	800	900	700	850	950	800
Cloud base (m)	500	550	2300	2350	2000	2200	1750	750	450	850	400	450	500	500	450	450	450	600

	7:03	—	—	7:01	—	—	6:58	—	—	6:58	—	—	6:56	—	—	6:54	—	—
	—	5:37	—	—	5:39	—	—	5:40	—	—	5:43	—	—	5:44	—	—	5:45	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 11mm), heaviest on Sun night. Mild temperatures (max 6°C on Sun morning, min 1°C on Fri morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 34mm), heaviest during Mon night. Later becoming colder with a dusting of snow on Tue night. Mild temperatures (max 5°C on Mon morning, min 1°C on Tue 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	-2° C	-	Calm (0 kph at 20).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (0 kph at 201).
Renton Airport 36 km WSW 218m alt. 3 hours ago	-1° C	Dry and cloudy.	Light winds from the SSE (9 kph at 160).	16 km Low: overcast
Auburn 39 km SW 119m alt. 54 minutes ago	10° C	Dry	Wind obs. (8 kph from 218 degs) was rejected.
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	-7° C	Moderate rain .	Wind obs. (9 kph from 1 degs) was rejected.	16 km Low: scattered Mid: broken High: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	-2° C	Dry and partly cloudy.	Light winds from the SSE (11 kph at 150).	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	-1° C	Dry and partly cloudy.	Light winds from the SE (11 kph at 130).	16 km Low: few Mid: broken High: broken
Snohomish 49 km NW 196m alt. 47 minutes ago	-2° C	-	Calm (5 kph at 55).
SHIP5481 54 km W 3m alt. 4 hours ago	0° C		Calm (5 kph at 90).
SHIP9832 54 km W 15m alt. 4 hours ago			Light winds from the E (8 kph at 80).	- km

* 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.