– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Tue 16 Sep Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Tue 16 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 19°C on Tue night, min 9°C on Thu morning). Wind will be generally light.										Days 5–7 Weather Summary Moderate rain (total 16mm), heaviest on Sat night. Very mild (max 15°C on Mon afternoon, min 7°C on Sun morning). Winds decreasing (strong winds from the WSW on Sat night, calm by Sun night).
		Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	some clouds	clear	clear	clear	some clouds	clear	some clouds	light rain	heavy rain	rain shwrs	rain shwrs	clear	clear	clear	some clouds
km/h	SE	SW	WNW	NNW	NNW	NNW	NNW	NNW	WNW	WSW	SW	SW	WSW	WSW	WNW	WNW	SSW	SSW	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	0.7	12	1.9	0.6	—	—	—	—
max°C	19	16	15	13	10	11	12	13	14	13	10	10	10	8	9	9	13	15	15
min°C	17	15	15	10	9	11	11	12	13	11	10	9	9	7	9	7	11	14	13
chill°C	17	15	15	8	7	10	10	11	13	9	7	6	5	3	6	7	11	14	12

Freezing level (m)	4250	4050	4000	3850	3650	3800	4000	4100	4150	4050	3750	3650	3200	2600	3300	3900	4200	4200	4050
Cloud base (m)					600				7950	7250	900	1950	400	650	1600				6300

	—	6:46	—	—	6:47	—	—	6:48	—	—	6:50	—	—	6:50	—	—	6:52	—	—
	—	—	7:15	—	—	7:13	—	—	7:10	—	—	7:08	—	—	7:07	—	—	7:05	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 19°C on Tue night, min 9°C on Thu morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 16mm), heaviest on Sat night. Very mild (max 15°C on Mon afternoon, min 7°C on Sun morning). Winds decreasing (strong winds from the WSW on Sat night, calm by Sun night).

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. 55 minutes ago	17° C	Dry	Calm (0 kph at 84).
Renton Airport 36 km WSW 218m alt. 2 hours ago	28° C	Clear	Light winds from the SE (11 kph at 130).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	17° C	Dry	Calm (0 kph at 174).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	14° C	Clear	Calm (0 kph at 0).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	28° C	Clear	Moderate winds from the SE (20 kph at 130).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	27° C	Clear	Moderate winds from the SE (22 kph at 130).	16 km
Seattle 49 km WSW 100m alt. 44 minutes ago	22° C	-
SHIP3652 51 km W 15m alt. 2 hours ago				- km
BUOY-WPOW1 55 km W 3m alt. 58 minutes ago	23° C		Calm (2 kph at 130).
Puyallup 57 km SSW 160m alt. 40 minutes ago	23° C	Dry	Calm (0 kph at 318).

* 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.