– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Wed 28 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Wed 28 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 26mm), heaviest during Fri morning. Mild temperatures (max 8°C on Sat morning, min 2°C on Wed night). Winds decreasing (fresh winds from the S on Wed night, light winds from the SSE by Fri night).										Days 5–7 Weather Summary Mild with light rain (total 3mm) on Sun morning Becoming colder with a light covering of snow, mostly falling on Sun morning. Mild temperatures (max 8°C on Tue afternoon, min 1°C on Sun morning). Winds decreasing (fresh winds from the WSW on Sun afternoon, calm by Tue morning).
		Thursday 29			Friday 30			Saturday 31			Sunday 1			Monday 2			Tuesday 3
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. rain	light rain	light rain	light rain	light rain	light rain	some clouds	light rain	light rain	light rain	mod. snow	snow shwrs	some clouds	cloudy	light snow	light rain	cloudy	some clouds	clear
km/h	S	SSW	SW	SSW	SSW	SW	SW	SSE	SSW	SSE	SSW	WSW	SW	SSW	S	SW	SSW	E	SE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	6	1	—	—	1	—	—	—	—
mm	8	3	3	4	5	1.7	—	2	0.3	0.3	1.9	—	—	—	—	0.8	—	—	—
max °C	3	3	4	5	4	4	7	8	8	5	2	2	1	2	1	4	7	8	10
min °C	2	3	3	4	3	4	5	6	7	3	1	1	1	2	1	2	5	8	9
chill °C	-3	-1	0	0	-3	-1	3	3	4	0	-5	-5	-5	-1	-1	-3	4	8	8

Freezing level m	1700	1800	2000	2250	2000	2000	2500	2500	2400	2150	1650	1550	1400	1500	1400	1850	2300	2900	3400
Cloud base (m)	450	450	700	450	2300	550	1000	1550	1600	800	550	450	600	800	950	450	600	5950

	—	7:35	—	—	7:35	—	—	7:33	—	—	7:31	—	—	7:31	—	—	7:30	—	—
	—	—	5:04	—	—	5:05	—	—	5:07	—	—	5:07	—	—	5:09	—	—	5:10	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 26mm), heaviest during Fri morning. Mild temperatures (max 8°C on Sat morning, min 2°C on Wed night). Winds decreasing (fresh winds from the S on Wed night, light winds from the SSE by Fri night).

Mount Si Weather (Days 3-6):

Mild with light rain (total 3mm) on Sun morning Becoming colder with a light covering of snow, mostly falling on Sun morning. Mild temperatures (max 8°C on Tue afternoon, min 1°C on Sun morning). Winds decreasing (fresh winds from the WSW on Sun afternoon, calm by Tue morning).

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. 2 hours ago	9° C	Dry	Calm (0 kph at 339).
Black Diamond 32 km SSW 192m alt. 1 hour ago	9° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	9° C	Light rain .	Wind obs. (7 kph from 160 degs) was rejected.	16 km Low: few Mid: overcast
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 205).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-1° C	Light snow.	Wind obs. (6 kph from 1 degs) was rejected.	1 km Mid: few High: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	8° C	Light rain .	Light winds from the SSE (15 kph at 150).	14 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	9° C	Light rain .	Light winds from the SE (15 kph at 140).	14 km Low: overcast
Snohomish 49 km NW 196m alt. 55 minutes ago	8° C	Dry	Calm (5 kph at 180).
SHIP9157 51 km W 3m alt. 1 hour ago	9° C
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	10° C		Moderate winds from the SE (26 kph at 140).

* 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.