– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Thu 09 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Thu 09 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 3mm), mostly falling on Sat afternoon. Very mild (max 11°C on Thu afternoon, min 2°C on Sat morning). Wind will be generally light.											Days 5–7 Weather Summary Light rain (total 3mm) on Sun night. Becoming colder with heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 4°C on Sun afternoon, min -5°C on Tue night). Winds increasing (light winds from the WNW on Sun afternoon, gales from the SW by Tue night).
	Thu 9		Friday 10			Saturday 11			Sunday 12			Monday 13			Tuesday 14
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	cloudy	cloudy	some clouds	light rain	light rain	light rain	light rain	rain shwrs	light snow	light snow	snow shwrs	cloudy	light snow	light snow	heavy snow
km/h	ESE	SE	SE	N	NW	SW	SW	SW	WNW	WNW	SW	WSW	WSW	SW	SW	SW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	2	1	1	—	2	3	13
mm	—	—	—	—	—	0.5	2	0.2	0.1	1.1	1.5	—	—	—	—	—	—
max °C	11	11	10	10	9	4	2	2	2	4	3	-1	0	0	-1	-1	0
min °C	10	9	10	10	6	2	2	2	2	3	-2	-1	0	-2	-2	-1	-5
chill °C	9	8	10	10	6	-2	-1	-1	1	1	-10	-8	-5	-8	-10	-9	-13

Freezing level m	2800	2800	2700	2650	2400	1750	1750	1800	1750	1850	1100	1150	1300	1000	1050	1100	1150
Cloud base (m)	9300	9250	3300	2600	2100	1600	400	400	400	650	400	500	400	450	450	400	400

	—	—	6:28	—	—	6:26	—	—	6:24	—	—	6:22	—	—	6:20	—	—
	7:46	—	—	7:49	—	—	7:50	—	—	7:51	—	—	7:52	—	—	7:53	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 3mm), mostly falling on Sat afternoon. Very mild (max 11°C on Thu afternoon, min 2°C on Sat morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 3mm) on Sun night. Becoming colder with heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 4°C on Sun afternoon, min -5°C on Tue night). Winds increasing (light winds from the WNW on Sun afternoon, gales from the SW by Tue 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. 39 minutes ago	7° C	Dry	Calm (0 kph at 328).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	2° C	-	Calm (0 kph at 245).
Renton 30 km WSW 160m alt. 36 minutes ago	12° C	Dry	Calm (2 kph at 337).
Black Diamond 32 km SSW 192m alt. 43 minutes ago		-	Calm (5 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	12° C	Dry	Calm (3 kph at 48).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14° C	Clear	Light winds from the NNW (15 kph at 330).	16 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	4° C	Dry	Calm (2 kph at 36).
Auburn 39 km SW 119m alt. 2 hours ago	21° C	Dry	Calm (0 kph at 262).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	6° C	Clear	Calm (0 kph at 0).	16 km
Woodinville 43 km WNW 137.2m alt. 37 minutes ago	7° C	Dry	Calm (2 kph at 131).

* 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.