– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Thu 19 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Thu 19 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 5mm), mostly falling on Sun afternoon. Freeze-thaw conditions (max 7°C on Sun morning, min -3°C on Thu night). Wind will be generally light.										Days 5–7 Weather Summary Heavy rain (total 45mm), heaviest during Mon afternoon. Later becoming colder with a dusting of snow on Tue night. Mild temperatures (max 7°C on Mon night, min 1°C on Tue night). Winds increasing (calm on Mon morning, fresh winds from the SW by Mon night).
		Friday 20			Saturday 21			Sunday 22			Monday 23			Tuesday 24			Wednesday 25
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	cloudy	light rain	some clouds	light rain	light rain	rain shwrs	light rain	light rain	mod. rain	light rain	mod. rain	rain shwrs	rain shwrs	light rain	light snow	light rain	rain shwrs	rain shwrs
km/h	S	SSW	SSW	ESE	ESE	ESE	ESE	SE	ESE	S	ESE	SSE	S	SW	SW	SW	WSW	SW	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2	—	—	—
mm	—	—	0.1	—	0.2	0.5	0.1	1.6	2	6	5	10	15	2	3	1.4	1.7	2	0.1
max °C	-2	2	3	1	6	5	4	7	6	4	5	5	7	4	4	2	3	4	3
min °C	-3	1	1	1	5	3	3	5	4	4	5	5	6	4	3	1	2	3	0
chill °C	-3	-1	0	-2	2	-2	-2	1	2	0	3	3	3	-1	-2	-3	-2	0	-2

Freezing level m	0	600	800	700	1300	1300	1300	1500	1350	1250	1250	1800	2150	1000	1000	750	800	1000	800
Cloud base (m)	650	400	550		2450	2050	2400	1600	850	450	650	400	400	400	450	550	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: Light rain (total 5mm), mostly falling on Sun afternoon. Freeze-thaw conditions (max 7°C on Sun morning, min -3°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 45mm), heaviest during Mon afternoon. Later becoming colder with a dusting of snow on Tue night. Mild temperatures (max 7°C on Mon night, min 1°C on Tue night). Winds increasing (calm on Mon morning, fresh winds from the SW by Mon 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 43 minutes ago	-4° C	-	Calm (0 kph at 358).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (10 kph from 161 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	1° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken
Auburn 39 km SW 119m alt. 31 minutes ago	-4° C	-	Calm (0 kph at 134).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-7° C	Mist -.	Wind obs. (6 kph from 1 degs) was rejected.	8 km Low: broken Mid: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	1° C	Dry and partly cloudy.	Light winds from the ENE (6 kph at 70).	16 km Low: scattered Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	1° C	Dry and partly cloudy.	Light winds from the NE (7 kph at 50).	16 km Low: broken
Snohomish 49 km NW 196m alt. 1 hour ago	-2° C	-	Wind obs. (6 kph from 19 degs) was rejected.
SHIP6283 54 km W 15m alt. 2 hours ago			Calm (6 kph at 80).	- km
SHIP9178 54 km W 15m alt. 2 hours ago			Calm (2 kph at 10).	- 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.