– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Sun 16 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 4 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 28°C on Fri afternoon, min 15°C on Wed night). Wind will be generally light.
	Sun 16		Monday 17			Tuesday 18			Wednesday 19			Thursday 20			Friday 21
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	some clouds	cloudy	clear	clear	some clouds	some clouds	clear	clear	clear	clear	some clouds	rain shwrs	rain shwrs
Cloud base (m)	750	8650				6600	6250	650	500		5900					3950	3950
km/h	NW	ENE	WNW	NW	ESE	W	WSW	S	NW	WNW	ESE	WNW	NW	E	W	W	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.1	0.7
max °C	21	18	20	24	20	20	23	19	18	22	20	22	26	22	23	28	21
min °C	20	15	16	23	15	16	22	13	15	21	15	18	25	18	20	26	16
chill °C	20	15	16	23	15	16	22	13	15	21	15	18	25	18	20	26	16

Freezing level m	3950	4050	4050	4100	4050	4100	4150	4300	4400	4350	4250	4350	4550	4700	4400	4400	4300

	—	—	6:05	—	—	6:05	—	—	6:07	—	—	6:09	—	—	6:09	—	—
	—	8:16	—	—	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 28°C on Fri afternoon, min 15°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. 44 minutes ago	26° C	Dry	Calm (0 kph at 269).
Black Diamond 32 km SSW 192m alt. 45 minutes ago		-	Calm (5 kph at 34).
Renton Airport 36 km WSW 218m alt. 2 hours ago	23° C	Dry and partly cloudy.	Light winds from the NNW (7 kph at 340).	16 km Low: broken
Auburn 39 km SW 119m alt. 1 hour ago	33° C	Dry	Calm (0 kph at 218).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	23° C	Clear	Light winds from the N (6 kph at 1).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	22° C	Dry and partly cloudy.	Light winds from the N (9 kph at 1).	16 km Low: scattered
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	22° C	Dry	Wind obs. (10 kph from 239 degs) was rejected.
Seattle 49 km WSW 100m alt. 1 hour ago	31° C	-
SHIP5312 54 km W 15m alt. 3 hours ago			Calm (6 kph at 300).	- km

* 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.