– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Sun 03 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Sun 03 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Warm (max 24°C on Sun afternoon, min 11°C on Tue night). Wind will be generally light.											Days 5–7 Weather Summary Moderate rain (total 10mm), heaviest on Fri night. Very mild (max 17°C on Wed afternoon, min 7°C on Wed night). Wind will be generally light.
	Sun 3		Monday 4			Tuesday 5			Wednesday 6			Thursday 7			Friday 8
	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	some clouds	some clouds	some clouds	some clouds	some clouds	cloudy	light rain	mod. rain
km/h	NW	E	WNW	WNW	NNE	W	WNW	SSW	WSW	WSW	SSW	W	W	SSW	SW	WSW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.6	8
max °C	24	19	20	22	18	17	20	17	16	17	13	13	16	14	11	12	8
min °C	24	16	18	21	12	14	19	11	13	17	7	10	15	10	10	9	8
chill °C	24	16	18	21	12	14	19	11	12	17	7	10	15	9	9	7	6

Freezing level m	3500	3550	3450	3500	3600	3550	3550	3550	3450	3300	2850	3250	3250	3300	2000	1850	2050
Cloud base (m)	8700		9300	8300					9500		2300		6900	5400	5100	850	450

	—	—	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. Warm (max 24°C on Sun afternoon, min 11°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 10mm), heaviest on Fri night. Very mild (max 17°C on Wed afternoon, min 7°C on Wed 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. 52 minutes ago	28° C	Dry	Calm (0 kph at 252).
Renton 30 km WSW 160m alt. 2 hours ago	28° C	Dry	Calm (5 kph at 1).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Wind obs. (10 kph from 217 degs) was rejected.
Grotto wx 35 km NE 321m alt. 2 hours ago	28° C	Dry	Light winds from the W (18 kph at 271).
Renton Airport 36 km WSW 218m alt. 2 hours ago	26° C	Clear	Moderate winds from the NNW (22 kph at 330).	16 km
Grotto wx 39 km NE 1101m alt. 48 minutes ago	21° C	Dry	Calm (2 kph at 26).
Auburn 39 km SW 119m alt. 58 minutes ago	23° C	Dry	Calm (3 kph at 196).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	22° C	Clear	Wind obs. (9 kph from 1 degs) was rejected.	16 km
SHIP4707 43 km W 15m alt. 3 hours ago				- km
SHIP3262 43 km W 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.