– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Sun 15 Sep Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Sun 15 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Light rain (total 4mm), mostly falling on Tue night. Very mild (max 11°C on Mon afternoon, min 5°C on Sun morning). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 3mm), mostly falling on Wed afternoon. Very mild (max 10°C on Fri night, min 5°C on Thu night). Wind will be generally light.
	Sunday 15			Monday 16			Tuesday 17			Wednesday 18			Thursday 19			Friday 20
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	rain shwrs	clear	clear	clear	clear	some clouds	light rain	light rain	light rain	rain shwrs	rain shwrs	rain shwrs	rain shwrs	some clouds	some clouds	some clouds	clear
km/h	NNE	N	N	NNW	NW	WNW	SW	WSW	WSW	NNW	NNW	NNW	WNW	WSW	W	NNW	NW	N
Wave Height Map See all maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.1	0.1	—	—	—	—	—	1.3	2	0.6	1.2	0.2	0.3	0.5	—	—	—	—
max°C	5	8	10	10	11	11	7	8	8	7	8	8	8	8	8	5	8	10
min°C	5	6	8	10	10	8	7	8	8	7	8	7	7	8	5	5	7	9
chill°C	2	6	6	9	10	7	4	5	6	6	7	6	6	7	4	4	6	8

Freezing level (m)	2350	2650	3050	3550	3700	3600	2750	2750	2850	3250	3400	3650	3950	3750	3800	3800	3750	3900
Cloud base (m)	650	800	6650			8500	900	600	400	450	550	900	600	650	850	700	7950

	6:45	—	—	6:46	—	—	6:47	—	—	6:48	—	—	6:50	—	—	6:50	—	—
	—	7:16	—	—	7:15	—	—	7:13	—	—	7:10	—	—	7:08	—	—	7:07	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 4mm), mostly falling on Tue night. Very mild (max 11°C on Mon afternoon, min 5°C on Sun morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 3mm), mostly falling on Wed afternoon. Very mild (max 10°C on Fri night, min 5°C on Thu night). Wind will be generally light.

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. 40 minutes ago	19° C	Dry	Calm (0 kph at 115).
Renton Airport 36 km WSW 218m alt. 2 hours ago	17° C	Dry and cloudy.	Light winds from the N (11 kph at 350).	16 km Low: overcast
Auburn 39 km SW 119m alt. 57 minutes ago	29° C	Dry	Calm (0 kph at 355).
Monroe 44 km NW 80m alt. 1 hour ago	7° C	Dry	Calm (0 kph at 319).
Seattl / oeing Airport 44 km WSW 218m alt. 1 hour ago	19° C	Dry and partly cloudy.	Light winds from the NW (13 kph at 310).	16 km Low: broken Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 1 hour ago	16° C	Dry and partly cloudy.	Light winds from the N (9 kph at 0).	16 km Low: few Mid: broken
Seattle 49 km WSW 100m alt. 1 hour ago	27° C	-	Calm (2 kph at 50).
BUOY-WPOW1 55 km W 3m alt. 43 minutes ago	15° C		Moderate winds from the NNE (21 kph at 20).
Puyallup 57 km SSW 160m alt. 1 hour ago	17° C	Dry	Calm (2 kph at 67).
BUOY-TCNW1 57 km SW 3m alt. 55 minutes ago

* 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.