– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Sun 29 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Sun 29 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A light covering of new snow mostly falling on Sun afternoon. Freeze-thaw conditions (max 7°C on Tue afternoon, min -2°C on Sun night). Wind will be generally light.											Days 5–7 Weather Summary Moderate rain (total 14mm) heaviest on Wed night, then becoming colder with a dusting of snow on Wed night. Mild temperatures (max 9°C on Fri afternoon, min 1°C on Wed night). Wind will be generally light.
	Sun 29		Monday 30			Tuesday 31			Wednesday 1			Thursday 2			Friday 3
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	snow shwrs	some clouds	rain shwrs	some clouds	some clouds	cloudy	cloudy	light rain	light rain	light snow	light snow	rain shwrs	light rain	rain shwrs	rain shwrs	clear
km/h	W	NNW	NNW	N	ESE	S	W	SE	ESE	ESE	WSW	WNW	W	SSW	WSW	WSW	ESE
See all weather maps
cm	3	5	—	—	—	—	—	—	—	—	2	2	—	—	—	—	—
mm	0.2	—	—	0.1	—	—	—	—	0.4	3	8	1.2	1.2	0.5	0.2	0.1	—
max °C	5	0	1	4	2	6	7	4	6	6	3	2	5	4	6	9	6
min °C	2	-2	-2	3	0	3	7	4	4	6	1	1	4	3	4	8	4
chill °C	-1	-4	-2	3	-2	2	7	3	1	3	-2	-1	3	3	4	8	4

Freezing level m	850	300	650	1000	1200	1350	1350	1300	1300	1250	750	800	1150	1100	1200	1500	1700
Cloud base (m)	450	600	450	750	400	4300	1600	750	650	400	400	450	500	450	500	850	1600

	—	—	6:50	—	—	6:48	—	—	6:46	—	—	6:43	—	—	6:41	—	—
	7:31	—	—	7:32	—	—	7:34	—	—	7:36	—	—	7:37	—	—	7:38	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A light covering of new snow mostly falling on Sun afternoon. Freeze-thaw conditions (max 7°C on Tue afternoon, min -2°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 14mm) heaviest on Wed night, then becoming colder with a dusting of snow on Wed night. Mild temperatures (max 9°C on Fri afternoon, min 1°C on Wed 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. 32 minutes ago	2° C	-	Calm (0 kph at 347).
Renton 30 km WSW 160m alt. 1 hour ago	3° C	-	Calm (3 kph at 352).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Wind obs. (14 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	5° C	Dry and cloudy.	Light winds from the N (13 kph at 0).	16 km Low: few Mid: scattered High: overcast
Auburn 39 km SW 119m alt. 2 hours ago		-	Calm (0 kph at 97).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-3° C	Light snow.	Light winds from the N (6 kph at 1).	2 km Mid: broken High: overcast
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	5° C	Dry and cloudy.	Light winds from the N (6 kph at 1).	16 km Low: few Mid: broken High: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 1 hour ago	4° C	Light rain .	Moderate winds from the N (20 kph at 0).	11 km Low: broken Mid: broken High: overcast
Snohomish 49 km NW 196m alt. 1 hour ago	3° C	Dry	Calm (3 kph at 157).
BUOY-WPOW1 55 km W 3m alt. 51 minutes ago	5° C		Light winds from the NNW (17 kph at 340).

* 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.