– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Tue 20 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Tue 20 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 10°C on Wed morning, min 2°C on Thu night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Mild temperatures (max 9°C on Sat morning, min 2°C on Fri night). Wind will be generally light.
	Tue 20		Wednesday 21			Thursday 22			Friday 23			Saturday 24			Sunday 25
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	some clouds	cloudy	some clouds	clear	clear	clear	clear	clear	clear	clear	cloudy	some clouds	cloudy
km/h	SE	ESE	SE	S	ESE	ESE	NNW	ESE	ESE	E	ESE	SE	NW	ESE	SSE	SSW	S
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	9	5	10	8	4	7	5	3	8	6	3	9	7	3	8	6	5
min °C	6	4	7	5	3	6	3	2	5	3	2	6	4	3	6	4	5
chill °C	4	3	7	5	3	6	2	0	4	1	0	6	4	3	5	3	3

Freezing level m	3000	2900	2750	2600	2400	2050	1700	1500	1700	1800	2100	2250	2200	2100	2050	1900	1700
Cloud base (m)	6700	8900	7000	6550		6400	5550	4850				8550	8100			6200	2400

	—	—	7:45	—	—	7:43	—	—	7:43	—	—	7:41	—	—	7:41	—	—
	4:50	—	—	4:51	—	—	4:52	—	—	4:53	—	—	4:55	—	—	4:57	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 10°C on Wed morning, min 2°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Mild temperatures (max 9°C on Sat morning, min 2°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. 24 minutes ago	2° C	-	Calm (0 kph at 343).
Black Diamond 32 km SSW 192m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	3° C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 34 minutes ago	-3° C	-	Calm (0 kph at 243).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-7° C	Mist -.	Wind obs. (7 kph from 20 degs) was rejected.	3 km Low: overcast
SHIP161 43 km W -m alt. 2 hours ago	8° C	No report.	Calm (2 kph at 310).
SHIP5719 43 km W 15m alt. 3 hours ago				- km
SHIP353 43 km W -m alt. 3 hours ago	9° C	No report.	Light winds from the NNW (9 kph at 340).
SHIP514 43 km W -m alt. 2 hours ago	8° C	No report.	Light winds from the NNW (11 kph at 330).
SHIP4143 43 km W 15m alt. 3 hours ago	10° C		Calm (4 kph at 160).	- 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.