– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Tue 06 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Tue 06 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Warm (max 21°C on Wed afternoon, min 12°C on Thu night). Wind will be generally light.									Days 4–6 Weather Summary Moderate rain (total 14mm), heaviest on Fri afternoon. Very mild (max 12°C on Fri morning, min 5°C on Sat night). Wind will be generally light.
	Tuesday 6			Wednesday 7			Thursday 8			Friday 9			Saturday 10			Sunday 11
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	clear	clear	rain shwrs	light rain	light rain	mod. rain	rain shwrs	rain shwrs	clear	clear	clear	clear
Cloud base (m)		8850	9300			8900	9050	8800		400	400	400	550	850	2900
km/h	NNW	NNW	NE	NW	NNW	NE	NNW	NW	SSW	WSW	WNW	S	S	NNW	E	NNW	N	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	0.1	3	5	5	0.4	0.3	—	—	—	—
max °C	17	19	14	18	21	16	18	20	15	12	9	7	7	10	7	10	12	8
min °C	13	18	14	14	20	14	15	20	12	11	8	6	6	9	5	5	12	7
chill °C	13	18	14	14	20	14	15	20	10	8	7	6	5	9	3	4	12	6

Freezing level m	4100	4150	4250	4100	4100	4100	4100	4050	3700	2250	1750	1350	1350	1700	1750	1900	2400	3200

	7:11	—	—	7:13	—	—	7:15	—	—	7:16	—	—	7:16	—	—	7:18	—	—
	—	6:37	—	—	6:35	—	—	6:32	—	—	6:30	—	—	6:29	—	—	6:27	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 21°C on Wed afternoon, min 12°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 14mm), heaviest on Fri afternoon. Very mild (max 12°C on Fri morning, min 5°C on Sat 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
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (5 kph at 113).
Renton Airport 36 km WSW 218m alt. 2 hours ago	15°C	Clear	Light winds from the N (19 kph at 350).	16 km
Auburn 39 km SW 119m alt. 36 minutes ago	23°C	Dry	Calm (0 kph at 311).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	12°C	Clear	Wind obs. (6 kph from 230 degs) was rejected.	16 km
Monroe 44 km NW 80m alt. 43 minutes ago	19°C	Dry	Calm (0 kph at 115).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	14°C	Fog - in the vicinity.	Wind obs. (6 kph from 60 degs) was rejected.	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	15°C	-	Light winds from the N (9 kph at 10).	16 km Low: few Mid: few High: scattered
BUOY-EBSW1 46 km W 3m alt. 56 minutes ago
Snohomish 49 km NW 196m alt. 1 hour ago	12°C	Dry	Calm (0 kph at 180).
Seattle 49 km WSW 100m alt. 43 minutes ago		-	Calm (3 kph at 84).

* 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.