– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Fri 18 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Fri 18 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Warm (max 21°C on Sat afternoon, min 13°C on Fri night). Wind will be generally light.										Days 5–7 Weather Summary Some drizzle, heaviest during Wed afternoon. Very mild (max 16°C on Tue afternoon, min 8°C on Wed night). Wind will be generally light.
		Saturday 19			Sunday 20			Monday 21			Tuesday 22			Wednesday 23
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	clear	some clouds	clear	some clouds	cloudy	some clouds	some clouds	some clouds	rain shwrs	rain shwrs
Cloud base (m)	9200							5950		7150	6350			2550	1550	750
km/h	E	WNW	NW	ESE	WNW	WNW	SE	W	WNW	NE	NW	W	SSE	SW	WSW	NW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.7	1.1
max °C	14	18	21	16	19	21	16	16	19	14	15	16	12	13	14	10
min °C	13	14	20	13	14	21	13	13	18	11	11	14	9	10	13	8
chill °C	13	14	20	13	14	21	13	13	18	11	11	14	9	10	13	8

Freezing level m	3900	3850	3850	4050	4100	4050	4000	3800	3750	3850	3400	3250	2900	2550	2400	2500

	—	6:48	—	—	6:50	—	—	6:50	—	—	6:52	—	—	6:54	—	—
	—	—	7:10	—	—	7:08	—	—	7:07	—	—	7:05	—	—	7:02	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 21°C on Sat afternoon, min 13°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Wed afternoon. Very mild (max 16°C on Tue afternoon, min 8°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. 3 hours ago	13°C	Dry	Calm (0 kph at 54).
Black Diamond 32 km SSW 192m alt. 57 minutes ago		-	Calm (3 kph at 0).
Auburn 39 km SW 119m alt. 48 minutes ago	14°C	Dry	Calm (0 kph at 93).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	9°C	Mist -.	Wind obs. (7 kph from 1 degs) was rejected.	5 km Low: overcast
Monroe 44 km NW 80m alt. 2 hours ago	7°C	Dry	Calm (0 kph at 273).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	16°C	Clear	Light winds from the SW (6 kph at 230).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	14°C	-	Light winds from the S (9 kph at 170).	16 km Low: few
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 3 hours ago	9°C	Dry	Calm (0 kph at 109).
Seattle 49 km WSW 100m alt. 1 hour ago		-

* 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.