– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Thu 18 Jun Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Thu 18 Jun Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Warm (max 25°C on Fri afternoon, min 11°C on Fri night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 28°C on Tue afternoon, min 14°C on Sun morning). Wind will be generally light.
	Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23
	AM	PM	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	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	some clouds	clear
km/h	NW	NW	ESE	W	W	S	WSW	W	ENE	WNW	NW	E	SSE	NW	ESE	WNW	NW	NE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	19	22	19	22	25	22	16	20	18	18	23	20	25	27	24	26	28	24
min °C	16	22	16	20	24	11	13	18	11	14	21	16	21	27	19	23	27	16
chill °C	16	22	16	20	24	10	12	18	11	14	21	16	21	27	19	23	27	16

Freezing level m	4100	4200	4150	4000	4100	3900	3600	3650	3650	3500	3700	3650	3700	4000	3950	3900	4100	3950
Cloud base (m)			7000	6900	6150				9500				9100	8750	9500		6850

	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—
	—	—	9:07	—	—	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 25°C on Fri afternoon, min 11°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 28°C on Tue afternoon, min 14°C on Sun morning). 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. 38 minutes ago	26° C	Dry	Calm (0 kph at 336).
Snoqualmie Pass 30 km ESE 824m alt. 28 minutes ago	27° C	-	Calm (0 kph at 212).
Renton 30 km WSW 160m alt. 1 hour ago	23° C	Dry	Wind obs. (6 kph from 309 degs) was rejected.
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Wind obs. (6 kph from 201 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	24° C	Dry	Moderate winds from the W (23 kph at 275).
Renton Airport 36 km WSW 218m alt. 2 hours ago	23° C	Clear	Moderate winds from the NNW (20 kph at 330).	16 km
Grotto wx 39 km NE 1101m alt. 55 minutes ago	23° C	Dry	Calm (3 kph at 31).
Auburn 39 km SW 119m alt. 23 minutes ago	37° C	Dry	Calm (0 kph at 261).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	22° C	Clear	Calm (0 kph at 0).	16 km
SHIP4806 42 km WSW 15m alt. 2 hours ago			Moderate winds from the N (25 kph at 350).	- 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.