– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Sun 12 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Sun 12 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 22mm), heaviest during Tue night. Later becoming colder with a dusting of snow on Tue night. Freeze-thaw conditions (max 12°C on Sun afternoon, min 0°C on Tue night). Winds increasing (calm on Sun morning, fresh winds from the SSW by Tue night).									Days 4–6 Weather Summary Light rain (total 6mm) at first, then becoming colder with a dusting of snow on Wed afternoon. Freeze-thaw conditions (max 6°C on Fri afternoon, min -2°C on Wed night). Wind will be generally light.
	Sunday 12			Monday 13			Tuesday 14			Wednesday 15			Thursday 16			Friday 17
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	rain shwrs	light rain	light rain	light rain	light rain	light rain	light rain	light snow	light snow	light snow	snow shwrs	rain shwrs	rain shwrs	rain shwrs	rain shwrs	rain shwrs	some clouds
km/h	NW	WNW	SW	SW	SW	SW	SW	SSW	SW	SW	NW	N	WNW	NW	NNE	W	WNW	SE
See all weather maps
cm	—	—	—	—	—	—	—	—	1	1	2	1	—	—	—	—	—	—
mm	—	0.2	4	2	2	1.5	1.4	5	6	—	3	—	0.6	0.5	1.9	0.3	0.1	—
max °C	10	12	9	4	5	5	4	5	5	2	3	0	3	5	3	5	6	5
min °C	8	11	5	4	5	3	4	5	0	0	1	-2	1	4	2	3	6	3
chill °C	8	10	2	1	3	0	1	1	-5	-5	-2	-2	1	3	2	3	6	3

Freezing level m	2050	2050	1400	1150	1300	1000	1050	1200	600	700	700	350	800	1100	900	1050	1250	1400
Cloud base (m)	650	850	400	450	400	450	500	400	400	500	450	700	450	600	550	500	750	800

	6:24	—	—	6:22	—	—	6:20	—	—	6:18	—	—	6:16	—	—	6:15	—	—
	—	7:51	—	—	7:52	—	—	7:53	—	—	7:55	—	—	7:57	—	—	7:58	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 22mm), heaviest during Tue night. Later becoming colder with a dusting of snow on Tue night. Freeze-thaw conditions (max 12°C on Sun afternoon, min 0°C on Tue night). Winds increasing (calm on Sun morning, fresh winds from the SSW by Tue night).

Mount Si Weather (Days 3-6):

Light rain (total 6mm) at first, then becoming colder with a dusting of snow on Wed afternoon. Freeze-thaw conditions (max 6°C on Fri afternoon, min -2°C on Wed night). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 500 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	14° C	Dry	Calm (0 kph at 332).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	14° C	-	Calm (0 kph at 103).
Renton 30 km WSW 160m alt. 1 hour ago	11° C	Dry	Calm (3 kph at 311).
Grotto wx 35 km NE 321m alt. 2 hours ago	13° C	Dry	Light winds from the WSW (8 kph at 242).
Renton Airport 36 km WSW 218m alt. 2 hours ago	11° C	Dry and cloudy.	Light winds from the NNW (7 kph at 330).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 39 minutes ago	12° C	Dry	Calm (3 kph at 84).
Auburn 39 km SW 119m alt. 2 hours ago		-	Wind obs. (11 kph from 273 degs) was rejected.
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	7° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Woodinville 43 km WNW 137.2m alt. 56 minutes ago	14° C	Dry	Calm (2 kph at 319).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	12° C	Dry and cloudy.	Light winds from the NW (6 kph at 310).	16 km Low: overcast

* 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.