– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Sun 03 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Sun 03 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 17°C on Sun morning, min 10°C on Tue night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 10°C on Wed afternoon, min 3°C on Fri morning). Winds increasing (calm on Thu morning, fresh winds from the SW by Fri morning).
	Sunday 3			Monday 4			Tuesday 5			Wednesday 6			Thursday 7			Friday 8
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	some clouds	clear	clear	some clouds	some clouds	rain shwrs	rain shwrs
km/h	NNE	NW	NNW	NW	WNW	NNW	NW	WNW	WSW	SW	SW	SSW	WSW	WSW	SW	SW	WSW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.1	0.8
max °C	17	17	17	14	15	13	12	13	12	9	10	8	7	10	9	4	4	5
min °C	16	17	15	14	14	11	11	12	10	9	10	6	6	8	5	3	4	4
chill °C	16	17	15	14	14	11	11	12	8	7	8	4	6	7	0	-2	0	1

Freezing level m	3350	3550	3550	3500	3550	3650	3550	3600	3650	3550	3350	3200	3300	3250	2800	1750	2050	3100
Cloud base (m)		8650		9150	8200							2300	9300		5600	2300	850	650

	5:47	—	—	5:45	—	—	5:43	—	—	5:41	—	—	5:41	—	—	5:39	—	—
	—	—	8:21	—	—	8:22	—	—	8:22	—	—	8:24	—	—	8:25	—	—	8:27

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 17°C on Sun morning, min 10°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 10°C on Wed afternoon, min 3°C on Fri morning). Winds increasing (calm on Thu morning, fresh winds from the SW by Fri 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 2 hours ago	27° C	Dry	Calm (0 kph at 81).
Renton 30 km WSW 160m alt. 51 minutes ago	27° C	Dry	Calm (5 kph at 339).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (8 kph from 360 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	28° C	Dry	Light winds from the WSW (10 kph at 254).
Renton Airport 36 km WSW 218m alt. 2 hours ago	24° C	Clear	Light winds from the NNW (19 kph at 330).	16 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	24° C	Dry	Calm (2 kph at 196).
Auburn 39 km SW 119m alt. 1 hour ago	23° C	Dry	Calm (3 kph at 244).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	22° C	Clear	Calm (0 kph at 0).	16 km
Woodinville 43 km WNW 137.2m alt. 2 hours ago	25° C	Dry	Wind obs. (6 kph from 133 degs) was rejected.
SHIP9951 43 km W 3m alt. 57 minutes ago	22° 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.