– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Tue 10 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Tue 10 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Moderate rain (total 13mm) on Wed night. Becoming colder with heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 3°C on Wed night, min -5°C on Tue afternoon). Winds decreasing (stormy winds from the WSW on Wed night, light winds from the WSW by Fri morning).											Days 5–7 Weather Summary A moderate fall of snow, heaviest on Fri night. Freeze-thaw conditions (max 6°C on Mon morning, min -7°C on Fri night). Winds increasing (calm on Sat night, strong winds from the SW by Sun night).
	Tue 10		Wednesday 11			Thursday 12			Friday 13			Saturday 14			Sunday 15
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	mod. snow	mod. snow	light snow	light snow	light snow	mod. snow	heavy snow	mod. snow	light snow	light snow	snow shwrs	some clouds	some clouds	cloudy	light snow	light rain
km/h	SW	WSW	SW	SW	WSW	WSW	WSW	WSW	WSW	WSW	NNW	NNW	NNW	N	SSW	SW	SW
See all weather maps
cm	1	6	6	2	3	2	6	21	8	2	5	1	—	—	—	3	—
mm	—	—	—	4	8	—	—	—	—	—	—	—	—	—	—	—	0.9
max °C	-4	-3	-1	2	3	-4	-3	-3	-3	-4	-5	-7	-5	0	0	1	5
min °C	-5	-4	-3	0	-4	-4	-3	-4	-4	-4	-7	-7	-6	-5	-2	0	3
chill °C	-13	-13	-9	-9	-14	-14	-11	-12	-8	-8	-15	-13	-10	-9	-7	-7	-3

Freezing level m	650	700	950	1650	800	700	750	600	600	600	300	450	600	0	1000	1600	2650
Cloud base (m)	700	450	400	400	450	450	400	400	400	400	450	500	450	650	1900	450	500

	—	—	7:28	—	—	7:26	—	—	7:24	—	—	7:22	—	—	7:20	—	—
	7:04	—	—	7:06	—	—	7:07	—	—	7:08	—	—	7:09	—	—	7:12	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 13mm) on Wed night. Becoming colder with heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 3°C on Wed night, min -5°C on Tue afternoon). Winds decreasing (stormy winds from the WSW on Wed night, light winds from the WSW by Fri morning).

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Fri night. Freeze-thaw conditions (max 6°C on Mon morning, min -7°C on Fri night). Winds increasing (calm on Sat night, strong winds from the SW by Sun 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. 48 minutes ago	3° C	Dry	Calm (0 kph at 160).
Snoqualmie Pass 30 km ESE 824m alt. 56 minutes ago	0° C	-	Calm (0 kph at 6).
Grotto wx 35 km NE 321m alt. 1 hour ago	0° C	-	Calm (0 kph at 123).
Baring wx 35 km NE 220m alt. 43 minutes ago	1° C	-	Calm (0 kph at 75).
Renton Airport 36 km WSW 218m alt. 2 hours ago	6° C	Dry and cloudy.	Light winds from the S (15 kph at 180).	16 km Low: broken Mid: broken High: overcast
Grotto wx 39 km NE 1101m alt. 2 hours ago	-3° C	-	Calm (0 kph at 238).
Auburn 39 km SW 119m alt. 57 minutes ago	10° C	Dry	Calm (0 kph at 54).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-3° C	Moderate snow.	Calm (0 kph at 0).	1 km
SHIP4495 42 km WSW 15m alt. 3 hours ago				- km
SHIP6923 42 km WSW 15m alt. 3 hours ago				- 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.