– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Tue 05 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Tue 05 May 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 afternoon, min 6°C on Wed night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 19°C on Sun afternoon, min 7°C on Fri night). Wind will be generally light.
	Tue 5		Wednesday 6			Thursday 7			Friday 8			Saturday 9			Sunday 10
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	some clouds	some clouds	some clouds	clear	some clouds	cloudy	cloudy	cloudy	clear	clear	clear	some clouds	clear	some clouds	some clouds
km/h	NW	ENE	WSW	WSW	W	WNW	W	SSW	SW	WSW	ESE	NW	NW	SE	W	W	NE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	19	16	15	16	13	12	16	13	10	11	11	14	18	15	16	19	14
min °C	18	11	13	16	6	9	15	9	9	11	7	11	17	11	13	18	9
chill °C	18	11	13	16	6	9	15	8	7	10	7	11	17	11	13	18	9

Freezing level m	3400	3550	3450	3150	3050	3250	3350	3250	1900	2100	2700	3300	3500	3400	3250	3300	3200
Cloud base (m)			9250	1850				5850		1800	2050		9250	7100	6300	5450	5500

	—	—	5:41	—	—	5:41	—	—	5:39	—	—	5:37	—	—	5:35	—	—
	—	8:22	—	—	8:24	—	—	8:25	—	—	8:27	—	—	8:29	—	—	8:30

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 19°C on Tue afternoon, min 6°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 19°C on Sun afternoon, min 7°C on Fri night). 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. 1 hour ago	16° C	Dry	Calm (0 kph at 357).
Renton 30 km WSW 160m alt. 1 hour ago	16° C	Dry	Calm (0 kph at 224).
Black Diamond 32 km SSW 192m alt. 2 hours ago	19° C	Dry	Wind obs. (8 kph from 226 degs) was rejected.
Grotto wx 35 km NE 321m alt. 49 minutes ago	14° C	Dry	Calm (2 kph at 236).
Renton Airport 36 km WSW 218m alt. 3 hours ago	18° C	Clear	Calm (0 kph at 0).	16 km
Grotto wx 39 km NE 1101m alt. 2 hours ago	13° C	Dry	Calm (0 kph at 49).
Auburn 39 km SW 119m alt. 2 hours ago	12° C	Dry	Calm (0 kph at 67).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	13° C	Clear	Wind obs. (9 kph from 1 degs) was rejected.	16 km
SHIP4192 42 km WSW 15m alt. 2 hours ago				- km
SHIP4564 42 km WSW 15m alt. 3 hours ago				- 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.