– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Fri 10 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Fri 10 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 11mm), heaviest on Sat morning. Very mild (max 18°C on Fri afternoon, min 4°C on Sun night). Wind will be generally light.									Days 4–6 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 5°C on Mon afternoon, min -1°C on Wed night). Wind will be generally light.
	Friday 10			Saturday 11			Sunday 12			Monday 13			Tuesday 14			Wednesday 15
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	some clouds	some clouds	light rain	light rain	some clouds	rain shwrs	rain shwrs	light rain	light rain	light rain	light rain	light rain	light rain	light snow	light snow	light rain	snow shwrs
km/h	SSW	NW	NW	SSW	SSW	SSE	W	WSW	SW	SW	WSW	SSW	SSW	SSW	SW	WSW	WNW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2	1	—	1
mm	—	—	—	4	3	—	0.1	0.7	4	2	1.5	1.7	1.3	5	6	—	4	—
max °C	16	18	14	8	7	7	8	9	7	4	5	4	4	4	4	1	3	1
min °C	12	17	9	7	7	6	7	8	4	4	5	3	3	4	0	1	3	-1
chill °C	12	17	9	6	6	6	7	7	0	1	3	0	0	0	-4	-3	1	-3

Freezing level m	2700	2750	2500	1600	1750	1800	1800	1700	1250	1100	1300	900	1050	1150	700	650	850	400
Cloud base (m)	3200	3000	2500	450	400	800	750	700	400	450	400	400	450	400	400	400	600	550

	6:28	—	—	6:26	—	—	6:24	—	—	6:22	—	—	6:20	—	—	6:18	—	—
	—	7:49	—	—	7:50	—	—	7:51	—	—	7:52	—	—	7:53	—	—	7:55	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 11mm), heaviest on Sat morning. Very mild (max 18°C on Fri afternoon, min 4°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 22mm), heaviest during Tue night. Later becoming colder with a dusting of snow on Tue night. Freeze-thaw conditions (max 5°C on Mon afternoon, min -1°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	16° C	Dry	Calm (0 kph at 351).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	7° C	-	Calm (0 kph at 73).
Renton 30 km WSW 160m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 210).
Black Diamond 32 km SSW 192m alt. 50 minutes ago		-	Calm (2 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	13° C	Dry	Calm (3 kph at 122).
Renton Airport 36 km WSW 218m alt. 3 hours ago	9° C	Clear	Calm (0 kph at 0).	16 km
Grotto wx 39 km NE 1101m alt. 42 minutes ago	11° C	Dry	Calm (0 kph at 58).
Auburn 39 km SW 119m alt. 1 hour ago	24° C	Dry	Calm (0 kph at 208).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	4° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Woodinville 43 km WNW 137.2m alt. 52 minutes ago	9° C	Dry	Calm (0 kph at 295).

* 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.