– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Sat 16 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Sat 16 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 7°C on Mon afternoon, min -1°C on Sat night). Wind will be generally light.											Days 5–7 Weather Summary Some drizzle, heaviest during Tue afternoon. Very mild (max 12°C on Thu afternoon, min 3°C on Tue night). Wind will be generally light.
	Sat 16		Sunday 17			Monday 18			Tuesday 19			Wednesday 20			Thursday 21
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	snow shwrs	snow shwrs	some clouds	rain shwrs	some clouds	cloudy	rain shwrs	some clouds	rain shwrs	rain shwrs	rain shwrs	clear	clear	some clouds	clear	clear	clear
km/h	NNW	NNW	NNW	NW	NW	NW	NW	WNW	SW	WNW	N	NNE	NNW	N	NW	NW	NNW
See all weather maps
cm	2	1	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	0.2	—	—	0.1	—	0.2	0.8	0.9	—	—	—	—	—	—
max °C	1	0	1	5	4	4	7	6	4	5	5	5	9	10	11	12	12
min °C	0	-1	0	2	3	4	6	3	3	4	3	4	8	9	10	12	8
chill °C	-3	-7	-4	2	1	2	4	1	0	0	0	1	8	8	9	11	7

Freezing level m	1350	1100	1350	2000	2050	1900	2200	2150	1950	2000	2350	2600	3100	3450	3300	3200	3300
Cloud base (m)	750	500	600				1650	1850	600	500	1700	600	8900	7150

	—	—	5:26	—	—	5:26	—	—	5:24	—	—	5:24	—	—	5:22	—	—
	—	8:37	—	—	8:38	—	—	8:39	—	—	8:42	—	—	8:43	—	—	8:44

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Freeze-thaw conditions (max 7°C on Mon afternoon, min -1°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Tue afternoon. Very mild (max 12°C on Thu afternoon, min 3°C on Tue night). Wind will be generally light.

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. 40 minutes ago	12° C	Dry	Calm (0 kph at 320).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	7° C	-	Calm (0 kph at 71).
Renton 30 km WSW 160m alt. 2 hours ago	12° C	Dry	Calm (3 kph at 262).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (6 kph from 213 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	8° C	Dry	Light winds from the W (6 kph at 269).
Renton Airport 36 km WSW 218m alt. 3 hours ago	13° C	-	Light winds from the NNW (15 kph at 330).	16 km Low: few
Grotto wx 39 km NE 1101m alt. 3 hours ago	2° C	-	Calm (0 kph at 67).
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (3 kph at 223).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	1° C	Fog -.	Light winds from the N (11 kph at 1).	0 km Low: broken Mid: broken High: broken
Woodinville 43 km WNW 137.2m alt. 40 minutes ago	9° C	Dry	Wind obs. (14 kph from 222 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.