– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Sun 27 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Sun 27 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 14mm), heaviest on Tue afternoon. Very mild (max 16°C on Sun afternoon, min 7°C on Tue night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 21°C on Fri afternoon, min 6°C on Wed morning). Wind will be generally light.
	Sunday 27			Monday 28			Tuesday 29			Wednesday 30			Thursday 1			Friday 2
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	clear	clear	some clouds	clear	rain shwrs	light rain	mod. rain	rain shwrs	clear	some clouds	some clouds	some clouds	clear	some clouds	clear	clear	clear
Cloud base (m)	5800			6600	3200	2300	500	400	750			3450	6300	9600	8950	7550
km/h	ENE	NW	E	WNW	SW	SSW	SW	WSW	NNW	NNW	NNW	ESE	NNE	NNE	ESE	SSW	SW	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	0.1	2	8	4	—	—	—	—	—	—	—	—	—
max °C	14	16	11	13	15	12	12	13	12	11	14	11	17	19	15	20	21	15
min °C	9	16	9	9	15	11	11	13	7	6	13	10	11	19	14	14	20	10
chill °C	8	16	9	9	15	10	9	11	6	6	13	10	11	19	14	14	20	10

Freezing level m	2750	2900	2950	2850	2850	3250	3250	2850	2500	2850	3200	3300	3550	3800	3950	3700	3450	3650

	6:58	—	—	7:01	—	—	7:01	—	—	7:03	—	—	7:05	—	—	7:05	—	—
	—	6:54	—	—	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 14mm), heaviest on Tue afternoon. Very mild (max 16°C on Sun afternoon, min 7°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 21°C on Fri afternoon, min 6°C on Wed morning). 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	17°C	Dry	Calm (3 kph at 311).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	17°C	Clear	Light winds from the N (15 kph at 350).	16 km
Auburn 39 km SW 119m alt. 37 minutes ago	29°C	Dry	Calm (0 kph at 32).
Monroe 44 km NW 80m alt. 27 minutes ago	19°C	Dry	Calm (0 kph at 5).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	16°C	Clear	Light winds from the NW.(Wind varies from 280 to 350 degs) (13 kph at 320).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	16°C	Dry and partly cloudy.	Light winds from the N (17 kph at 10).	16 km Low: scattered
BUOY-EBSW1 46 km W 3m alt. 54 minutes ago
Snohomish 49 km NW 196m alt. 2 hours ago	17°C	Dry	Calm (5 kph at 331).
Seattle 49 km WSW 100m alt. 28 minutes ago		-	Wind obs. (11 kph from 337 degs) was rejected.

* 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.