– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 am Thu 10 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 4 am Thu 10 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Light rain (total 4mm), mostly falling on Sat afternoon. Very mild (max 17°C on Thu afternoon, min 10°C on Thu night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 22°C on Tue afternoon, min 9°C on Sun night). Wind will be generally light.
	Thursday 10			Friday 11			Saturday 12			Sunday 13			Monday 14			Tuesday 15
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	rain shwrs	rain shwrs	cloudy	light rain	cloudy	cloudy	light rain	rain shwrs	light rain	rain shwrs	rain shwrs	clear	clear	clear	clear	clear	clear
Cloud base (m)	1650	800	1650	550	6100		2450	750	750	450	600	1850	600		8900
km/h	WSW	WSW	SSW	WSW	WNW	ENE	NNW	N	NW	SSW	WSW	SSE	NW	NW	E	NNW	NNW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	0.1	0.2	—	0.1	—	—	3	1	0.3	0.2	0.3	—	—	—	—	—	—
max °C	16	17	14	11	15	12	14	14	12	11	13	12	13	17	13	19	22	17
min °C	15	16	10	10	14	11	12	13	10	11	12	9	10	17	12	14	22	15
chill °C	15	16	9	10	14	11	12	13	10	11	11	9	10	17	12	14	22	15

Freezing level m	3700	3350	2950	2650	2750	2700	2500	2500	2550	2600	2700	3250	3300	3250	3200	3300	3650	4050

	6:37	—	—	6:37	—	—	6:39	—	—	6:41	—	—	6:41	—	—	6:43	—	—
	—	7:29	—	—	7:27	—	—	7:24	—	—	7:22	—	—	7:21	—	—	7:19	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 4mm), mostly falling on Sat afternoon. Very mild (max 17°C on Thu afternoon, min 10°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 22°C on Tue afternoon, min 9°C on Sun 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. 2 hours ago	16°C	Dry	Calm (3 kph at 13).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	16°C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	24°C	Dry	Calm (0 kph at 221).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	11°C	Dry and cloudy.	Wind obs. (7 kph from 1 degs) was rejected.	16 km Low: few Mid: overcast
Monroe 44 km NW 80m alt. 2 hours ago	23°C	Dry	Calm (0 kph at 71).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	17°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	14°C	Dry and partly cloudy.	Light winds from the N (7 kph at 350).	16 km Low: scattered Mid: scattered High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Parkwood Lane Mobile Home Park wx 46 km SW 111m alt. 46 minutes ago	22°C	Dry	Calm (3 kph at 303).

* 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.