– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Tue 29 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Tue 29 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 2mm), mostly falling on Tue night. Very mild (max 15°C on Thu afternoon, min 10°C on Tue night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 23°C on Sun afternoon, min 12°C on Fri night). Wind will be generally light.
		Wednesday 30			Thursday 1			Friday 2			Saturday 3			Sunday 4
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	some clouds	some clouds	some clouds	cloudy	some clouds	cloudy	light rain	rain shwrs	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)	450	700	6300	2750	2000	950	900	700	900	8250		9200		9300		8700
km/h	WSW	NNW	NNW	E	S	WSW	SW	WSW	WNW	E	E	N	E	ESE	NW	SE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	1.9	—	—	—	—	—	—	0.1	0.2	—	—	—	—	—	—	—
max °C	12	12	14	13	14	15	14	14	15	13	18	20	16	21	23	17
min °C	10	10	14	11	13	14	14	14	15	12	12	20	15	15	22	15
chill °C	9	10	14	11	13	14	14	14	15	12	12	20	15	15	22	15

Freezing level m	2900	3100	3250	3300	3350	3450	3300	3500	3550	3800	4000	4050	4150	4200	4100	4050

	—	7:03	—	—	7:05	—	—	7:05	—	—	7:07	—	—	7:09	—	—
	—	—	6:49	—	—	6:46	—	—	6:45	—	—	6:43	—	—	6:40	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 2mm), mostly falling on Tue night. Very mild (max 15°C on Thu afternoon, min 10°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 23°C on Sun afternoon, min 12°C on Fri 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 Airport 36 km WSW 218m alt. 3 hours ago	13°C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Auburn 39 km SW 119m alt. 42 minutes ago	13°C	Dry	Calm (0 kph at 90).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	5°C	Fog -.	Wind obs. (11 kph from 1 degs) was rejected.	1 km
Monroe 44 km NW 80m alt. 1 hour ago	22°C	Dry	Calm (0 kph at 213).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	13°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	14°C	Dry and partly cloudy.	Light winds from the NE (9 kph at 50).	16 km Low: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Parkwood Lane Mobile Home Park wx 46 km SW 111m alt. 3 hours ago	13°C	Dry	Calm (0 kph at 5).
Snohomish 49 km NW 196m alt. 51 minutes ago	7°C	Dry	Calm (0 kph at 99).
Lake Forest Park wx 49 km WNW 147m alt. 3 hours ago	11°C	Dry	Calm (0 kph at 0).

* 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.