– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Mon 08 Jun Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Mon 08 Jun Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 59mm), heaviest during Mon night. Later becoming colder with a dusting of snow on Tue night. Mild temperatures (max 8°C on Mon afternoon, min 2°C on Tue night). Winds decreasing (strong winds from the SW on Mon night, light winds from the NNW by Wed night).											Days 5–7 Weather Summary Mostly dry. Warm (max 21°C on Sun morning, min 9°C on Thu night). Wind will be generally light.
	Mon 8		Tuesday 9			Wednesday 10			Thursday 11			Friday 12			Saturday 13
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	heavy rain	heavy rain	light rain	light snow	rain shwrs	rain shwrs	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	clear
km/h	ESE	S	WSW	WSW	WSW	W	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NE	ESE	N	ESE
See all weather maps
cm	—	—	—	—	1	—	—	—	—	—	—	—	—	—	—	—	—
mm	1.4	33	15	4	3	1.2	1.5	—	—	—	—	—	—	—	—	—	—
max °C	8	7	4	4	3	3	6	6	8	11	11	11	13	13	17	19	19
min °C	7	5	4	4	2	2	4	5	6	10	9	10	12	12	15	19	18
chill °C	3	2	-2	-2	-4	-3	1	4	3	9	7	8	11	11	14	19	18

Freezing level m	2500	2350	1900	1850	1600	1700	2450	3350	3250	3300	3500	3800	3950	4100	4000	4050	4250
Cloud base (m)	2000	350	400	600	400	450	1000					9050		8500

	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—
	—	9:00	—	—	9:01	—	—	9:02	—	—	9:02	—	—	9:04	—	—	9:04

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 59mm), heaviest during Mon night. Later becoming colder with a dusting of snow on Tue night. Mild temperatures (max 8°C on Mon afternoon, min 2°C on Tue night). Winds decreasing (strong winds from the SW on Mon night, light winds from the NNW by Wed night).

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 21°C on Sun morning, min 9°C on Thu 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. 1 hour ago	13° C	Dry	Calm (0 kph at 339).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	11° C	-	Calm (0 kph at 14).
Renton 30 km WSW 160m alt. 56 minutes ago	13° C	Dry	Calm (0 kph at 45).
Black Diamond 32 km SSW 192m alt. 59 minutes ago		-	Wind obs. (6 kph from 234 degs) was rejected.
Grotto wx 35 km NE 321m alt. 49 minutes ago	13° C	Dry	Calm (0 kph at 58).
Renton Airport 36 km WSW 218m alt. 3 hours ago	14° C	Light rain .	Light winds from the NW (11 kph at 320).	11 km Low: broken Mid: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	8° C	Dry	Calm (0 kph at 138).
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 69).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	6° C	Light rain .	Calm (0 kph at 0).	8 km Mid: broken High: broken
SHIP4805 42 km WSW 3m alt. 2 hours ago

* 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.