– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Sun 16 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Sun 16 Aug 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 24°C on Mon afternoon, min 13°C on Tue night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 26°C on Thu afternoon, min 12°C on Fri night). Wind will be generally light.
		Monday 17			Tuesday 18			Wednesday 19			Thursday 20			Friday 21
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	some clouds	some clouds	clear	clear	some clouds	some clouds	some clouds	clear	clear	clear	some clouds	some clouds	clear
Cloud base (m)	8400	8800			6600	4750				5950			5450	4400	4600
km/h	E	WNW	NW	E	W	WSW	SSE	W	W	E	WNW	NW	E	WNW	WSW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	18	20	24	20	20	24	20	19	23	20	22	26	22	23	25	21
min °C	15	16	23	15	16	23	13	15	22	16	18	25	19	20	25	12
chill °C	15	16	23	15	16	23	13	15	22	16	18	25	19	20	25	12

Freezing level m	4050	4050	4100	4050	4150	4200	4300	4350	4350	4350	4500	4600	4700	4350	4250	3900

	—	6:05	—	—	6:05	—	—	6:07	—	—	6:09	—	—	6:09	—	—
	—	—	—	8:15	—	—	8:14	—	—	8:12	—	—	8:09	—	—	8:07

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 24°C on Mon afternoon, min 13°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 26°C on Thu afternoon, min 12°C on Fri 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. 1 hour ago	16° C	Dry	Calm (0 kph at 304).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	19° C	Clear	Light winds from the NW (13 kph at 320).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	23° C	Dry	Calm (0 kph at 47).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	17° C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	17° C	Dry and partly cloudy.	Light winds from the NNW (9 kph at 340).	16 km Low: scattered
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	14° C	Dry	Calm (2 kph at 134).
Seattle 49 km WSW 100m alt. 1 hour ago	29° C	-
SHIP1196 54 km W -m alt. 2 hours ago	16° C	-	Light winds from the WNW (11 kph at 300).

* 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.