– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Fri 26 Jul Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Fri 26 Jul Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 4mm), mostly falling on Mon morning. Very mild (max 15°C on Sat afternoon, min 8°C on Sun morning). Wind will be generally light.											Days 5–7 Weather Summary Moderate rain (total 11mm), heaviest on Mon afternoon. Warm (max 20°C on Thu morning, min 9°C on Tue morning). Winds decreasing (fresh winds from the SW on Mon afternoon, calm by Wed morning).
	Fri 26		Saturday 27			Sunday 28			Monday 29			Tuesday 30			Wednesday 31
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	clear	clear	some clouds	cloudy	rain shwrs	rain shwrs	light rain	mod. rain	light rain	light rain	rain shwrs	some clouds	rain shwrs	rain shwrs	clear
km/h	NW	NNW	NNW	WNW	SW	SW	SW	SW	SW	SW	WSW	SW	WSW	W	NW	NNW	N
Wave Height Map See all maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	0.1	0.3	3	6	4	0.8	0.2	—	0.1	0.1	—
max°C	14	13	11	15	14	8	10	10	10	10	11	9	11	11	11	15	16
min°C	13	11	11	14	9	8	9	9	10	10	10	9	10	10	10	13	16
chill°C	12	10	10	14	7	6	7	7	8	7	7	7	9	10	10	13	16

Freezing level (m)	3850	3750	3600	3500	3750	3800	3900	3850	3450	3600	3550	3550	3850	4550	4550	4700	4800
Cloud base (m)					700	450	750	500	400	400	400	450	850	800	650

	—	—	5:39	—	—	5:39	—	—	5:41	—	—	5:43	—	—	5:43	—	—
	—	8:47	—	—	8:45	—	—	8:45	—	—	8:44	—	—	8:42	—	—	8:40

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 4mm), mostly falling on Mon morning. Very mild (max 15°C on Sat afternoon, min 8°C on Sun morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 11mm), heaviest on Mon afternoon. Warm (max 20°C on Thu morning, min 9°C on Tue morning). Winds decreasing (fresh winds from the SW on Mon afternoon, calm by Wed morning).

This table gives the weather forecast for Mount Si at the specific elevation of 1270 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 36 minutes ago	14° C	Dry	Calm (0 kph at 42).
Black Diamond 32 km SSW 192m alt. 1 hour ago	32° C	Dry	Calm (0 kph at 259).
Renton Airport 36 km WSW 218m alt. 2 hours ago	22° C	-	Light winds from the N (13 kph at 350).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	18° C	Dry	Calm (0 kph at 211).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	12° C	Clear	Light winds from the N (6 kph at 1).	16 km
Monroe 44 km NW 80m alt. 1 hour ago	16° C	Dry	Calm (0 kph at 52).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	22° 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	20° C	Dry and partly cloudy.	Light winds from the NW (7 kph at 320).	16 km Low: scattered
Seattle 49 km WSW 40m alt. 38 minutes ago	18° C	Dry	Wind obs. (6 kph from 136 degs) was rejected.
Seattle 49 km WSW 100m alt. 41 minutes ago	26° C	-

* 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.