– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Tue 06 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Tue 06 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 12mm) on Tue afternoon, Becoming colder with a light covering of snow, mostly falling on Wed morning. Freeze-thaw conditions (max 4°C on Tue afternoon, min -1°C on Wed night). Wind will be generally light.											Days 5–7 Weather Summary Light rain (total 3mm), mostly falling on Sat night. Mild temperatures (max 8°C on Mon morning, min 2°C on Fri afternoon). Wind will be generally light.
	Tue 6		Wednesday 7			Thursday 8			Friday 9			Saturday 10			Sunday 11
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. rain	light snow	light snow	cloudy	snow shwrs	light snow	cloudy	light rain	light rain	some clouds	some clouds	some clouds	some clouds	light rain	light rain	some clouds	rain shwrs
km/h	SW	WSW	SSW	SW	SW	WSW	WSW	SW	SW	ESE	SE	SSE	SE	S	SSW	S	SSE
See all weather maps
cm	—	1	3	—	4	1	—	—	—	—	—	—	—	—	—	—	—
mm	9	1.5	—	—	—	—	—	0.6	0.5	—	—	—	—	3	0.4	—	0.1
max °C	4	3	1	1	1	1	2	3	3	3	4	7	6	4	6	5	5
min °C	3	1	1	1	-1	0	2	2	3	2	2	6	4	3	5	4	4
chill °C	-2	-4	-3	-4	-4	-4	-1	2	3	2	0	5	2	0	3	3	3

Freezing level m	1000	700	700	600	550	500	750	850	1000	1400	2350	2550	2550	1900	1400	1450	1900
Cloud base (m)	350	450	400	400	400	450	500	550	500	500	450	450	5050	1800	500	650	2550

	—	—	7:52	—	—	7:52	—	—	7:52	—	—	7:52	—	—	7:52	—	—
	4:31	—	—	4:32	—	—	4:34	—	—	4:35	—	—	4:36	—	—	4:37	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mild with moderate rain (total 12mm) on Tue afternoon, Becoming colder with a light covering of snow, mostly falling on Wed morning. Freeze-thaw conditions (max 4°C on Tue afternoon, min -1°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 3mm), mostly falling on Sat night. Mild temperatures (max 8°C on Mon morning, min 2°C on Fri afternoon). 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. 1 hour ago	4° C	Dry	Calm (0 kph at 346).
Black Diamond 32 km SSW 192m alt. 2 hours ago	11° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Dry and partly cloudy.	Light winds from the S (7 kph at 180).	16 km Low: scattered
Auburn 39 km SW 119m alt. 36 minutes ago	-2° C	-	Calm (0 kph at 145).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-2° C	Moderate snow.	Wind obs. (7 kph from 1 degs) was rejected.	0 km
SHIP4391 43 km W 15m alt. 2 hours ago			Light winds from the S (10 kph at 190).	- km
SHIP525 43 km W -m alt. 1 hour ago	7° C	-	Light winds from the SSW (9 kph at 200).
SHIP7877 43 km W 15m alt. 2 hours ago			Light winds from the S (10 kph at 190).	- km
SHIP4925 43 km W 15m alt. 3 hours ago			Light winds from the WSW (13 kph at 240).	- km
SHIP1249 43 km W -m alt. 1 hour ago	7° C	-	Light winds from the SSW (9 kph at 200).

* 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.