– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 am Thu 05 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 3 am Thu 05 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 29mm), heaviest during Sat afternoon. Later becoming colder with a dusting of snow on Sat night. Very mild (max 16°C on Thu morning, min 1°C on Sat night). Winds increasing (light winds from the SSW on Thu night, strong winds from the SW by Sat night).									Days 4–6 Weather Summary A moderate fall of snow, heaviest on Mon afternoon. Freeze-thaw conditions (max 1°C on Sun morning, min -4°C on Tue night). Winds decreasing (fresh winds from the SW on Mon morning, calm by Tue night).
	Thursday 5			Friday 6			Saturday 7			Sunday 8			Monday 9			Tuesday 10
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	some clouds	clear	some clouds	some clouds	light rain	heavy rain	light snow	cloudy	cloudy	snow shwrs	light snow	light snow	light snow	light snow	light snow	some clouds
km/h	ESE	SE	SW	SW	SW	SW	SSW	SSW	WSW	SW	WNW	NW	SW	SW	SW	SE	WSW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	1	—	—	2	3	4	4	1	1	—
mm	—	—	—	—	—	—	0.6	13	15	—	—	—	—	—	—	—	—	—
max °C	16	15	11	10	9	7	6	4	4	1	0	-1	-1	-1	-1	-2	-2	-3
min °C	16	12	9	9	8	6	3	4	1	1	0	-2	-1	-1	-2	-2	-3	-4
chill °C	15	11	7	6	5	2	-2	-2	-3	-2	-3	-8	-8	-8	-9	-5	-6	-7

Freezing level m	3850	3700	3200	2850	2700	2350	2250	2150	2000	1500	1300	1100	1050	1200	1000	950	900	800
Cloud base (m)			7100	6400	6600	3250	2950	750	450	800	550	550	450	400	400	450	400	400

	7:26	—	—	7:26	—	—	7:24	—	—	7:22	—	—	7:20	—	—	7:20	—	—
	—	5:14	—	—	5:15	—	—	5:17	—	—	5:19	—	—	5:21	—	—	5:22	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 29mm), heaviest during Sat afternoon. Later becoming colder with a dusting of snow on Sat night. Very mild (max 16°C on Thu morning, min 1°C on Sat night). Winds increasing (light winds from the SSW on Thu night, strong winds from the SW by Sat night).

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Mon afternoon. Freeze-thaw conditions (max 1°C on Sun morning, min -4°C on Tue night). Winds decreasing (fresh winds from the SW on Mon morning, calm by Tue night).

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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	3° C	Dry	Calm (0 kph at 16).
Black Diamond 32 km SSW 192m alt. 43 minutes ago	16° C	Dry	Wind obs. (13 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	6° C	Dry and partly cloudy.	Light winds from the NNE (6 kph at 30).	16 km Low: scattered
Auburn 39 km SW 119m alt. 1 hour ago	-7° C	-	Calm (0 kph at 318).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-2° C	Moderate rain .	Wind obs. (7 kph from 30 degs) was rejected.	16 km Low: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	5° C	Dry and partly cloudy.	Calm (0 kph at 0).	13 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	5° C	Fog patches -.	Light winds from the N (11 kph at 0).	11 km
Snohomish 49 km NW 196m alt. 33 minutes ago	6° C	Dry	Calm (3 kph at 320).
Seattle 49 km WSW 100m alt. 29 minutes ago	6° C	-	Wind obs. (19 kph from 331 degs) was rejected.
SHIP6499 54 km W 15m alt. 2 hours ago			Calm (4 kph at 300).	- 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.