– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Sat 11 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Sat 11 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 15mm), heaviest on Sat morning. Very mild (max 10°C on Sun morning, min 3°C on Mon night). Wind will be generally light.									Days 4–6 Weather Summary Heavy rain (total 24mm), mostly on Tue night. Becoming colder with a light covering of snow, mostly falling on Wed afternoon. Freeze-thaw conditions (max 5°C on Tue afternoon, min -1°C on Wed night). Wind will be generally light.
	Saturday 11			Sunday 12			Monday 13			Tuesday 14			Wednesday 15			Thursday 16
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	light rain	some clouds	some clouds	rain shwrs	light rain	light rain	light rain	light rain	light rain	light rain	snow shwrs	light snow	snow shwrs	some clouds	rain shwrs	rain shwrs	light snow
km/h	W	SSW	E	WNW	WNW	SW	SW	SW	SW	SW	SSW	SSW	SW	NW	NE	WSW	WSW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	1	2	2	—	—	—	1
mm	4	4	—	—	0.2	1.8	3	1.8	1.4	0.9	5	10	—	3	—	0.2	1.8	3
max °C	8	8	8	10	10	9	5	5	5	4	5	4	1	3	1	3	4	3
min °C	8	7	6	7	10	5	5	5	3	3	4	0	0	2	-1	2	3	2
chill °C	8	6	6	7	9	3	2	2	0	0	-1	-5	-5	-1	-1	2	1	0

Freezing level m	1900	1850	2100	1950	2050	1500	1200	1250	1000	1100	1100	600	650	850	200	900	1050	800
Cloud base (m)	600	400	1750	600	650	400	450	400	400	550	400	400	450	450	800	500	450	450

	6:26	—	—	6:24	—	—	6:22	—	—	6:20	—	—	6:18	—	—	6:16	—	—
	—	7:50	—	—	7:51	—	—	7:52	—	—	7:53	—	—	7:55	—	—	7:57	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 15mm), heaviest on Sat morning. Very mild (max 10°C on Sun morning, min 3°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 24mm), mostly on Tue night. Becoming colder with a light covering of snow, mostly falling on Wed afternoon. Freeze-thaw conditions (max 5°C on Tue 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. 46 minutes ago	13° C	Dry	Calm (0 kph at 315).
Snoqualmie Pass 30 km ESE 824m alt. 59 minutes ago	7° C	-	Calm (0 kph at 159).
Renton 30 km WSW 160m alt. 31 minutes ago	10° C	Dry	Calm (2 kph at 219).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Wind obs. (8 kph from 360 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	9° C	Dry	Calm (0 kph at 137).
Renton Airport 36 km WSW 218m alt. 2 hours ago	10° C	Dry and cloudy.	Light winds from the S (9 kph at 190).	16 km Low: broken Mid: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	4° C	Dry	Calm (0 kph at 211).
Auburn 39 km SW 119m alt. 49 minutes ago		-	Wind obs. (8 kph from 258 degs) was rejected.
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	Fog -.	Calm (0 kph at 0).	0 km
Woodinville 43 km WNW 137.2m alt. 46 minutes ago	12° C	Dry	Wind obs. (10 kph from 309 degs) was rejected.

* 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.