– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Mon 19 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Mon 19 Jan 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 11°C on Tue morning, min 3°C on Wed night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 10°C on Sat morning, min 2°C on Thu night). Wind will be generally light.
	Mon 19		Tuesday 20			Wednesday 21			Thursday 22			Friday 23			Saturday 24
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	cloudy	clear	clear	clear	clear	some clouds	some clouds	cloudy	light rain	clear	some clouds	some clouds	some clouds	clear	some clouds
km/h	ESE	SE	SE	SE	ESE	SE	SW	ESE	E	NW	SSE	WNW	WNW	ESE	SE	SSW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	0.1	—	—	—	—	—	—
max °C	10	8	11	9	6	10	8	4	7	6	4	7	6	3	10	8	5
min °C	7	7	8	6	5	8	5	3	6	4	2	5	4	3	6	5	4
chill °C	6	7	7	4	4	8	4	3	6	4	2	5	3	2	6	4	3

Freezing level m	3400	3550	3250	2900	2850	2650	2500	2500	2200	2000	1750	1450	1700	1900	2150	2200	2350
Cloud base (m)		9000		6650	9050	6750	8800	7000	7000	6250	3150	2200	6850	6900	6750	6350	6700

	—	—	7:46	—	—	7:45	—	—	7:43	—	—	7:43	—	—	7:41	—	—
	4:49	—	—	4:50	—	—	4:51	—	—	4:52	—	—	4:53	—	—	4:55	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 11°C on Tue morning, min 3°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 10°C on Sat morning, min 2°C on Thu 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	0° C	-	Calm (0 kph at 350).
Black Diamond 32 km SSW 192m alt. 2 hours ago	14° C	Dry	Calm (3 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	4° C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	1° C	-	Calm (0 kph at 88).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-7° C	Dry and cloudy.	Light winds from the E (6 kph at 80).	0.0 km High: overcast
SHIP171 43 km W -m alt. 59 minutes ago	7° C	No report.	Light winds from the SSE (6 kph at 160).
SHIP4337 43 km W 3m alt. 2 hours ago
SHIP1125 43 km W -m alt. 3 hours ago	9° C	No report.	Light winds from the NW (7 kph at 320).
SHIP7280 43 km W 15m alt. 3 hours ago	10° C		Light winds from the SSE (8 kph at 150).	- km
SHIP3620 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.