– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Wed 08 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Wed 08 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Some drizzle, heaviest during Sat afternoon. Very mild (max 11°C on Thu afternoon, min 3°C on Sat afternoon). Wind will be generally light.										Days 5–7 Weather Summary Drizzle on Sun afternoon turning to light snow on Mon morning. Freeze-thaw conditions (max 4°C on Sat night, min -2°C on Mon night). Winds increasing (calm on Sat night, near gales from the WSW by Tue afternoon).
		Thursday 9			Friday 10			Saturday 11			Sunday 12			Monday 13			Tuesday 14
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	some clouds	some clouds	rain shwrs	light rain	light rain	rain shwrs	rain shwrs	light rain	light rain	light snow	cloudy	light snow	light snow	light snow	mod. snow
km/h	NE	ESE	ENE	SE	SSE	WNW	NNE	S	SSW	SSW	W	WSW	WSW	SW	SW	WSW	WSW	WSW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	1	—	2	2	2	9
mm	—	—	—	—	—	—	0.1	0.3	1.2	0.1	0.1	0.5	0.3	—	—	—	—	—	—
max °C	6	8	11	10	10	9	8	5	3	4	2	2	2	0	0	0	-1	-1	-1
min °C	6	7	10	9	9	9	6	4	3	3	2	2	0	-1	-1	-2	-1	-1	-5
chill °C	4	5	10	8	8	9	4	2	0	3	2	0	-4	-7	-8	-10	-9	-9	-12

Freezing level m	2600	2600	2800	2750	2650	2550	2400	2000	1950	2000	1700	1750	1500	1150	1200	1100	1100	1100	600
Cloud base (m)	9150	9300			3250	2700	2200	1400	400	1700	500	550	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: Some drizzle, heaviest during Sat afternoon. Very mild (max 11°C on Thu afternoon, min 3°C on Sat afternoon). Wind will be generally light.

Mount Si Weather (Days 3-6):

Drizzle on Sun afternoon turning to light snow on Mon morning. Freeze-thaw conditions (max 4°C on Sat night, min -2°C on Mon night). Winds increasing (calm on Sat night, near gales from the WSW by Tue afternoon).

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. 1 hour ago	4° C	Dry	Calm (3 kph at 173).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	-3° C	-	Calm (0 kph at 72).
Renton 30 km WSW 160m alt. 56 minutes ago	7° C	Dry	Calm (0 kph at 23).
Black Diamond 32 km SSW 192m alt. 54 minutes ago		-	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 57 minutes ago	5° C	Dry	Calm (5 kph at 67).
Renton Airport 36 km WSW 218m alt. 3 hours ago	9° C	Clear	Wind obs. (7 kph from 320 degs) was rejected.	16 km
Grotto wx 39 km NE 1101m alt. 3 hours ago	-1° C	-	Calm (0 kph at 347).
Auburn 39 km SW 119m alt. 1 hour ago	8° C	Dry	Calm (0 kph at 277).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	3° C	Clear	Calm (0 kph at 0).	16 km
Woodinville 43 km WNW 137.2m alt. 1 hour ago	-2° C	-	Calm (0 kph at 272).

* 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.