– Lat/Long: 47.51° N 121.74° W

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

Issued: 4 am Thu 09 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Light rain (total 4mm), mostly falling on Fri night. Very mild (max 11°C on Thu afternoon, min 2°C on Sat morning). Wind will be generally light.									Days 4–6 Weather Summary Drizzle on Sun afternoon followed by colder weather and a heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 3°C on Sun morning, min -4°C on Tue night). Winds increasing (calm on Sun morning, near gales from the SSW by Tue night).
	Thursday 9			Friday 10			Saturday 11			Sunday 12			Monday 13			Tuesday 14
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	some clouds	some clouds	cloudy	rain shwrs	light rain	rain shwrs	some clouds	light rain	light rain	light rain	cloudy	cloudy	light snow	light snow	light snow	heavy snow
km/h	ESE	ENE	ESE	SE	WSW	ESE	SW	SSW	WSW	W	WNW	SW	SW	WSW	SW	SW	SW	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1	5	4	14
mm	—	—	—	—	—	1.8	1.3	0.4	—	0.2	0.8	0.2	—	—	—	—	—	—
max °C	8	11	11	10	10	8	5	3	3	3	3	3	-2	0	0	-1	-1	-1
min °C	7	10	10	10	9	6	2	2	3	2	3	-2	-2	0	-2	-2	-1	-4
chill °C	5	10	8	10	8	6	-1	0	1	0	0	-9	-10	-6	-10	-10	-9	-13

Freezing level m	2650	2800	2850	2650	2550	2300	1800	1950	2000	1700	1800	1250	1050	1300	1000	1050	1100	1150
Cloud base (m)	9200	9350		3100	2200	1600	650	350	1600	500	400	400	450	400	400	400	400	400

	6:30	—	—	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 4mm), mostly falling on Fri night. 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):

Drizzle on Sun afternoon followed by colder weather and a heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 3°C on Sun morning, min -4°C on Tue night). Winds increasing (calm on Sun morning, near gales from the SSW 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. 37 minutes ago	12° C	Dry	Calm (0 kph at 340).
Snoqualmie Pass 30 km ESE 824m alt. 37 minutes ago	0° C	-	Calm (0 kph at 11).
Renton 30 km WSW 160m alt. 2 hours ago	9° C	Dry	Calm (2 kph at 233).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 35).
Grotto wx 35 km NE 321m alt. 1 hour ago	7° C	Dry	Calm (5 kph at 95).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Clear	Light winds from the N (7 kph at 1).	16 km
Grotto wx 39 km NE 1101m alt. 44 minutes ago	14° C	Dry	Calm (0 kph at 171).
Auburn 39 km SW 119m alt. 3 hours ago	18° C	Dry	Calm (0 kph at 325).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	Clear	Calm (0 kph at 0).	16 km
Woodinville 43 km WNW 137.2m alt. 42 minutes ago	9° C	Dry	Calm (0 kph at 187).

* 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.