– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Sun 27 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Sun 27 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Moderate rain (total 19mm), heaviest on Tue afternoon. Very mild (max 15°C on Mon afternoon, min 8°C on Wed morning). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 21°C on Sat afternoon, min 11°C on Wed night). Wind will be generally light.
		Monday 28			Tuesday 29			Wednesday 30			Thursday 1			Friday 2
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	some clouds	light rain	light rain	mod. rain	rain shwrs	clear	some clouds	some clouds	some clouds	some clouds	some clouds	clear	some clouds	clear
Cloud base (m)		6250	3350	750	400	400	450	9050	5800	3300	3250	2850	3450	1650	1550	8800
km/h	ESE	W	SW	SW	SW	WSW	NNW	NNW	NW	SSE	SSW	SW	S	W	NW	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	0.5	3	10	6	—	—	—	—	—	—	—	—	—
max °C	11	13	15	12	12	13	12	11	15	12	17	17	13	16	17	12
min °C	9	9	15	11	12	13	9	8	14	11	13	15	12	12	17	12
chill °C	9	9	15	9	10	11	9	8	14	11	13	15	12	12	17	12

Freezing level m	2950	2900	2750	3400	3100	2950	3000	3350	3450	3450	3500	3300	3100	3250	3750	4100

	—	7:01	—	—	7:01	—	—	7:03	—	—	7:05	—	—	7:05	—	—
	—	—	6:52	—	—	6:51	—	—	6:49	—	—	6:46	—	—	6:45	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 19mm), heaviest on Tue afternoon. Very mild (max 15°C on Mon afternoon, min 8°C on Wed morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 21°C on Sat afternoon, min 11°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
Renton 30 km WSW 160m alt. 1 hour ago	7°C	Dry	Calm (0 kph at 71).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	9°C	Clear	Calm (0 kph at 0).	16 km
Monroe 44 km NW 80m alt. 1 hour ago		-	Calm (0 kph at 196).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	9°C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	9°C	-	Light winds from the NNE (11 kph at 20).	16 km Low: few
BUOY-EBSW1 46 km W 3m alt. 2 hours ago
Snohomish 49 km NW 196m alt. 1 hour ago	4°C	Dry	Calm (0 kph at 161).
Seattle 49 km WSW 100m alt. 1 hour ago		-
BUOY-WPOW1 55 km W 3m alt. 2 hours ago	11°C		Calm (5 kph at 50).

* 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.