– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Fri 14 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Fri 14 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 25°C on Fri afternoon, min 15°C on Fri night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Warm (max 25°C on Mon afternoon, min 13°C on Tue night). Wind will be generally light.
	Fri 14		Saturday 15			Sunday 16			Monday 17			Tuesday 18			Wednesday 19
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	rain shwrs	some clouds	clear	clear	clear	clear	some clouds	clear	clear	clear	clear	some clouds	clear
Cloud base (m)		9200	2850	3150		6550	9350	8750			2450	5750		9400
km/h	WNW	ESE	W	WNW	ESE	NW	NW	ENE	NW	NW	S	WSW	W	ENE	NW	WNW	NE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	0.1	—	—	—	—	—	—	—	—	—	—	—	—
max °C	25	21	19	24	21	19	23	20	21	25	20	18	22	19	19	23	19
min °C	23	15	17	23	15	16	22	15	17	23	14	15	21	13	16	22	16
chill °C	23	15	17	23	15	16	22	15	17	23	14	15	21	13	16	22	16

Freezing level m	3550	3600	3700	3750	3750	3800	4050	4100	4050	4000	3800	3950	4150	4400	4500	4400	4650

	—	—	6:01	—	—	6:03	—	—	6:05	—	—	6:05	—	—	6:07	—	—
	—	8:21	—	—	8:19	—	—	8:16	—	—	8:15	—	—	8:14	—	—	8:12

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 25°C on Fri afternoon, min 15°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 25°C on Mon afternoon, min 13°C on Tue 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 (2 kph at 307).
Renton Airport 36 km WSW 218m alt. 2 hours ago	25° C	Clear	Light winds from the N (11 kph at 1).	16 km
Auburn 39 km SW 119m alt. 2 hours ago		-	Calm (0 kph at 331).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	19° C	Dry and cloudy.	Wind obs. (7 kph from 1 degs) was rejected.	14 km Low: few Mid: scattered High: overcast
SHIP5103 42 km WSW 3m alt. 2 hours ago	23° C		Light winds from the NNW (11 kph at 340).
SHIP7383 42 km WSW 3m alt. 3 hours ago	21° C		Light winds from the N (9 kph at 0).
SHIP9725 42 km WSW 3m alt. 57 minutes ago	22° C		Light winds from the N (11 kph at 350).
SHIP4333 42 km WSW 15m alt. 3 hours ago			Light winds from the N (10 kph at 0).	- km
SHIP7952 42 km WSW 15m alt. 2 hours ago			Light winds from the NNW (12 kph at 340).	- km
SHIP4842 42 km WSW 15m alt. 3 hours ago			Light winds from the N (10 kph at 0).	- 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.