– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Sat 22 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Sat 22 Aug Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Some drizzle, heaviest during Sun morning. Warm (max 22°C on Tue morning, min 9°C on Sat night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 20°C on Tue night, min 8°C on Thu morning). Wind will be generally light.
		Sunday 23			Monday 24			Tuesday 25			Wednesday 26			Thursday 27
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	rain shwrs	rain shwrs	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	rain shwrs	rain shwrs	some clouds
Cloud base (m)	400	500	850				9250		4350			8500		700	1600
km/h	WSW	WSW	NW	N	ESE	ENE	SE	ESE	W	SW	WSW	WSW	SW	SW	W	NW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.4	0.7	0.3	—	—	—	—	—	—	—	—	—	—	0.1	0.1	—
max °C	11	9	11	13	17	21	20	22	22	20	15	16	13	8	13	11
min °C	9	9	11	12	15	20	20	20	22	16	15	15	10	8	11	8
chill °C	7	7	10	12	15	20	20	20	22	16	15	15	8	6	10	7

Freezing level m	3300	3250	3600	4000	4050	4150	4200	4250	4350	4250	4100	4050	3850	3450	3450	3550

	—	6:13	—	—	6:13	—	—	6:15	—	—	6:16	—	—	6:18	—	—
	—	—	—	8:05	—	—	8:02	—	—	8:00	—	7:59	—	—	7:57	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Some drizzle, heaviest during Sun morning. Warm (max 22°C on Tue morning, min 9°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 20°C on Tue night, min 8°C on Thu morning). Wind will be generally light.

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	18°C	Dry	Calm (2 kph at 172).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (11 kph from 132 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 3 hours ago	20°C	Dry and partly cloudy.	Light winds from the W (7 kph at 280).	16 km Low: broken
Auburn 39 km SW 119m alt. 2 hours ago	26°C	Dry	Calm (0 kph at 149).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	19°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	18°C	Dry and partly cloudy.	Light winds from the WSW (11 kph at 250).	16 km Low: scattered
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 51 minutes ago	18°C	Dry	Wind obs. (10 kph from 231 degs) was rejected.
Seattle 49 km WSW 100m alt. 1 hour ago	28°C	-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	16°C		Light winds from the NE (8 kph at 50).

* 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.