– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Thu 10 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Thu 10 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 31mm), heaviest during Sat night. Very mild (max 17°C on Sat afternoon, min 9°C on Thu night). Wind will be generally light.										Days 5–7 Weather Summary Light rain (total 3mm), mostly falling on Sun night. Warm (max 20°C on Wed afternoon, min 9°C on Mon night). Wind will be generally light.
		Friday 11			Saturday 12			Sunday 13			Monday 14			Tuesday 15
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	cloudy	some clouds	some clouds	cloudy	cloudy	heavy rain	heavy rain	mod. rain	rain shwrs	rain shwrs	rain shwrs	some clouds	some clouds	rain shwrs	clear
Cloud base (m)	1950	600	5450	5050	4700	3450	400	400	400	850	650	900		1550	1700
km/h	SW	WSW	WNW	E	SSE	W	WSW	SW	SW	SW	WSW	NW	E	NW	NNW	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.4	—	—	—	—	—	11	13	6	2	0.2	0.1	—	—	0.1	—
max °C	15	13	16	13	16	17	13	9	11	11	11	14	12	12	14	11
min °C	9	10	16	12	14	16	10	9	10	10	10	14	9	10	14	10
chill °C	9	10	16	12	14	16	8	7	8	8	10	14	9	10	14	10

Freezing level m	3000	3000	3000	2900	2950	2950	2450	2300	2550	2850	3350	3300	3350	2550	2600	3200

	—	6:37	—	—	6:39	—	—	6:41	—	—	6:41	—	—	6:43	—	—
	—	—	7:27	—	—	7:24	—	—	7:22	—	—	7:21	—	—	7:19	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 31mm), heaviest during Sat night. Very mild (max 17°C on Sat afternoon, min 9°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 3mm), mostly falling on Sun night. Warm (max 20°C on Wed afternoon, min 9°C on Mon 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	12°C	Dry	Calm (0 kph at 157).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	16°C	Dry and cloudy.	Light winds from the SSW (6 kph at 200).	16 km Low: overcast
Auburn 39 km SW 119m alt. 2 hours ago	11°C	Dry	Calm (0 kph at 69).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	8°C	Fog -.	Wind obs. (7 kph from 1 degs) was rejected.	0 km
Monroe 44 km NW 80m alt. 1 hour ago	20°C	Dry	Calm (0 kph at 123).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	14°C	Dry and partly cloudy.	Light winds from the SSE (13 kph at 160).	16 km Low: few Mid: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	13°C	Dry and partly cloudy.	Light winds from the SW (9 kph at 230).	16 km Low: scattered
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	8°C	Dry	Calm (0 kph at 127).

* 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.