– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Mon 16 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Mon 16 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 56mm), heaviest during Tue night. Mild temperatures (max 7°C on Mon afternoon, min 4°C on Mon morning). Mainly strong winds.									Days 4–6 Weather Summary Heavy rain (total 39mm), heaviest during Fri morning. Later becoming colder with a dusting of snow on Fri night. Freeze-thaw conditions (max 8°C on Thu night, min -5°C on Fri night). Winds decreasing (near gales from the WSW on Fri morning, calm by Sat night).
	Monday 16			Tuesday 17			Wednesday 18			Thursday 19			Friday 20			Saturday 21
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	rain shwrs	light rain	light rain	light rain	heavy rain	heavy rain	mod. rain	light rain	light rain	mod. rain	mod. rain	heavy rain	rain shwrs	light snow	snow shwrs	some clouds	clear
km/h	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	WSW	SW	SW	WNW	NNW	N
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1	1	—	—
mm	5	0.4	0.5	2	1.6	19	17	7	4	0.4	6	7	17	7	1.1	—	—	—
max °C	5	7	7	6	7	7	6	7	7	6	5	8	8	4	2	-4	-2	-1
min °C	4	7	4	4	7	7	6	6	6	5	5	6	7	3	-5	-5	-3	-2
chill °C	-1	2	-2	-2	3	3	1	0	1	-1	-1	1	1	-4	-10	-9	-6	-2

Freezing level m	2800	2850	2600	2600	2650	2750	2600	2750	2600	2650	2700	2650	2500	1750	900	750	1000	650
Cloud base (m)	600	650	2250	600	450	400	450	400	500	1600	450	650	400	550	450	450	550	500

	7:18	—	—	7:16	—	—	7:13	—	—	7:11	—	—	7:09	—	—	7:07	—	—
	—	7:13	—	—	7:14	—	—	7:15	—	—	7:16	—	—	7:19	—	—	7:20	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 56mm), heaviest during Tue night. Mild temperatures (max 7°C on Mon afternoon, min 4°C on Mon morning). Mainly strong winds.

Mount Si Weather (Days 3-6):

Heavy rain (total 39mm), heaviest during Fri morning. Later becoming colder with a dusting of snow on Fri night. Freeze-thaw conditions (max 8°C on Thu night, min -5°C on Fri night). Winds decreasing (near gales from the WSW on Fri morning, calm by Sat 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. 1 hour ago	7° C	Dry	Calm (0 kph at 341).
Snoqualmie Pass 30 km ESE 824m alt. 32 minutes ago	4° C	-	Calm (0 kph at 80).
Black Diamond 32 km SSW 192m alt. 3 hours ago		-	Light winds from the W (10 kph at 268).
Grotto wx 35 km NE 321m alt. 1 hour ago	8° C	Dry	Calm (2 kph at 30).
Baring wx 35 km NE 220m alt. 1 hour ago	7° C	Dry	Calm (2 kph at 131).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Clear	Calm (0 kph at 0).	16 km
Grotto wx 39 km NE 1101m alt. 2 hours ago	7° C	Light rain.	Calm (3 kph at 90).
Auburn 39 km SW 119m alt. 1 hour ago	18° C	Dry	Calm (0 kph at 261).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	7° C	Clear	Wind obs. (6 kph from 1 degs) was rejected.	16 km
Woodinville 43 km WNW 137.2m alt. 31 minutes ago	11° C	Dry	Calm (5 kph at 39).

* 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.