– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Wed 17 Jun Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Wed 17 Jun 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 Fri afternoon, min 9°C on Fri night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Warm (max 28°C on Mon afternoon, min 13°C on Sat night). Wind will be generally light.
	Wed 17		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear
km/h	NW	NE	NW	NW	ESE	W	W	SSW	W	NW	ENE	WNW	NW	ESE	WSW	NW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	19	17	19	22	19	21	24	20	15	21	19	20	24	21	26	28	24
min °C	18	11	15	22	16	18	23	9	12	19	13	17	23	17	22	28	20
chill °C	18	11	15	22	16	18	23	9	12	19	13	17	23	17	22	28	20

Freezing level m	3800	4150	4150	4200	4150	4050	4050	3800	3750	3700	3650	3450	3850	3800	3800	4150	4150
Cloud base (m)					6300	5000	4950								9650		9500

	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—
	—	9:06	—	—	9:07	—	—	9:07	—	—	9:07	—	—	9:07	—	—	9:07

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 24°C on Fri afternoon, min 9°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 28°C on Mon afternoon, min 13°C on Sat 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
Harman Heights wx 6 km SSW 251m alt. 2 hours ago	13° C	Dry	Calm (0 kph at 330).
Snoqualmie Pass 30 km ESE 824m alt. 2 hours ago	13° C	-	Calm (0 kph at 231).
Renton 30 km WSW 160m alt. 2 hours ago	19° C	Dry	Calm (0 kph at 359).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (5 kph at 154).
Grotto wx 35 km NE 321m alt. 2 hours ago	17° C	Dry	Calm (3 kph at 280).
Renton Airport 36 km WSW 218m alt. 2 hours ago	21° C	-	Light winds from the N (13 kph at 350).	16 km Low: few
Grotto wx 39 km NE 1101m alt. 1 hour ago	9° C	Dry	Calm (2 kph at 341).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	11° C	-	Wind obs. (9 kph from 1 degs) was rejected.	16 km
SHIP1603 42 km WSW 15m alt. 2 hours ago			Light winds from the NW (8 kph at 310).	- km
SHIP4597 42 km WSW 3m alt. 3 hours ago	21° C		Light winds from the NW (8 kph at 320).

* 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.