– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Sun 30 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Sun 30 Aug Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Some drizzle, heaviest during Tue night. Very mild (max 16°C on Mon afternoon, min 5°C on Sun morning). Wind will be generally light.									Days 4–6 Weather Summary Moderate rain (total 18mm), heaviest on Wed night. Very mild (max 11°C on Fri afternoon, min 6°C on Wed night). Winds decreasing (fresh winds from the SSW on Wed night, calm by Fri night).
	Sunday 30			Monday 31			Tuesday 1			Wednesday 2			Thursday 3			Friday 4
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	some clouds	clear	clear	clear	some clouds	some clouds	rain shwrs	rain shwrs	rain shwrs	light rain	heavy rain	rain shwrs	rain shwrs	some clouds	light rain	rain shwrs	rain shwrs
Cloud base (m)	600	850	6850	9300	8750	5600	8150		1500	2050	1850	400		2200	5750	2100	2050	2650
km/h	NW	NNW	N	ESE	N	S	SW	SW	SW	SW	SW	SW	SSW	WNW	E	ESE	E	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.1	—	—	—	—	—	—	0.1	1	0.1	2	13	1.3	0.1	—	0.2	0.1	0.4
max °C	6	10	11	15	16	16	14	14	11	10	9	8	6	10	10	9	11	10
min °C	5	9	10	12	16	14	14	13	8	9	8	6	6	9	8	8	8	7
chill °C	4	8	8	12	16	14	14	12	6	6	5	2	4	8	6	6	8	6

Freezing level m	3250	3400	3750	3850	3850	3950	3750	3550	3250	2700	2650	2300	2250	2550	2800	2950	3100	3300

	6:22	—	—	6:22	—	—	6:24	—	—	6:26	—	—	6:26	—	—	6:28	—	—
	—	7:51	—	—	7:49	—	—	7:46	—	—	7:45	—	—	7:44	—	—	7:42	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Some drizzle, heaviest during Tue night. Very mild (max 16°C on Mon afternoon, min 5°C on Sun morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 18mm), heaviest on Wed night. Very mild (max 11°C on Fri afternoon, min 6°C on Wed night). Winds decreasing (fresh winds from the SSW on Wed night, calm by Fri night).

This table gives the weather forecast for Mount Si at the specific elevation of 1270 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	13°C	Dry	Calm (0 kph at 127).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13°C	Dry and partly cloudy.	Light winds from the SSE (6 kph at 150).	16 km Low: few Mid: broken
Auburn 39 km SW 119m alt. 38 minutes ago		-	Calm (0 kph at 114).
Monroe 44 km NW 80m alt. 36 minutes ago		-	Calm (0 kph at 5).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	14°C	Dry and cloudy.	Light winds from the SE (6 kph at 140).	16 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and partly cloudy.	Light winds from the SSE (13 kph at 150).	16 km Low: scattered Mid: broken High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	13°C	Dry	Calm (2 kph at 188).
Seattle 49 km WSW 100m alt. 1 hour ago		-	Calm (0 kph at 69).

* 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.