– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Sun 04 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Sun 04 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mild with moderate rain (total 20mm) on Tue afternoon, Becoming colder with a light covering of snow, mostly falling on Wed morning. Temperatures will be slightly above freezing (max 4°C on Sun afternoon, min 1°C on Tue night). Wind will be generally light.											Days 5–7 Weather Summary A dusting of snow turning to light rain (total 3mm) on Thu night. Freeze-thaw conditions (max 7°C on Sat morning, min -1°C on Wed night). Wind will be generally light.
	Sun 4		Monday 5			Tuesday 6			Wednesday 7			Thursday 8			Friday 9
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	rain shwrs	light rain	rain shwrs	light snow	mod. rain	mod. rain	light snow	light snow	cloudy	light snow	light snow	cloudy	light rain	light rain	some clouds	clear
km/h	S	SSW	SW	SW	SW	SSW	SW	WSW	SSW	SW	NW	WSW	WSW	WSW	SSW	SSE	SE
See all weather maps
cm	—	—	—	—	1	—	—	2	4	—	3	1	—	—	—	—	—
mm	3	1.6	1.8	0.6	—	6	6	1.1	—	—	—	—	—	2	0.8	—	—
max °C	4	3	3	3	2	3	3	2	1	1	0	1	1	3	5	3	2
min °C	4	2	2	2	2	2	2	1	1	1	-1	0	1	2	3	2	2
chill °C	2	-1	-2	-1	-1	-3	-3	-5	-4	-4	-3	-5	-4	-1	1	0	0

Freezing level m	1150	950	850	850	750	850	950	650	700	650	450	550	600	1000	1050	1250	2050
Cloud base (m)	500	650	450	500	550	400	400	400	400	400	400	450	450	450	500	650	9100

	—	—	7:54	—	—	7:54	—	—	7:52	—	—	7:52	—	—	7:52	—	—
	4:29	—	—	4:30	—	—	4:31	—	—	4:32	—	—	4:34	—	—	4:35	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mild with moderate rain (total 20mm) on Tue afternoon, Becoming colder with a light covering of snow, mostly falling on Wed morning. Temperatures will be slightly above freezing (max 4°C on Sun afternoon, min 1°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

A dusting of snow turning to light rain (total 3mm) on Thu night. Freeze-thaw conditions (max 7°C on Sat morning, 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 2 hours ago	6° C	Dry	Calm (0 kph at 318).
Black Diamond 32 km SSW 192m alt. 42 minutes ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Dry and cloudy.	Light winds from the S (6 kph at 170).	16 km Low: few Mid: broken High: overcast
Auburn 39 km SW 119m alt. 28 minutes ago	2° C	-	Calm (0 kph at 186).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-1° C	Light snow.	Calm (0 kph at 0).	1 km
SHIP9553 43 km W 3m alt. 2 hours ago	8° C		Light winds from the S (13 kph at 170).
SHIP3310 43 km W 15m alt. 3 hours ago			Light winds from the SSE (12 kph at 150).	- km
SHIP9675 43 km W 15m alt. 3 hours ago			Light winds from the S (13 kph at 180).	- km
SHIP8619 43 km W 15m alt. 3 hours ago			Light winds from the S (13 kph at 180).	- km
SHIP1253 43 km W -m alt. 2 hours ago	8° C	-	Light winds from the S (13 kph at 170).

* 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.