– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 am Sun 16 Nov Local Time
Updates in:
hr min s
Update imminent

Issued: 3 am Sun 16 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Light rain (total 7mm) at first, then becoming colder with a dusting of snow on Mon night. Freeze-thaw conditions (max 8°C on Sun morning, min -2°C on Mon night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 8mm) at first, then becoming colder with a dusting of snow on Fri night. Freeze-thaw conditions (max 7°C on Wed afternoon, min -1°C on Fri night). Winds increasing (calm on Wed morning, near gales from the WSW by Fri afternoon).
	Sunday 16			Monday 17			Tuesday 18			Wednesday 19			Thursday 20			Friday 21
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	light rain	light rain	light rain	light rain	light snow	cloudy	light snow	some clouds	clear	some clouds	cloudy	some clouds	some clouds	light rain	light rain	mod. rain	snow shwrs
km/h	SSE	SW	SW	W	SW	SW	SW	WSW	WSW	E	SE	ESE	SW	W	SW	SW	WSW	WSW
See all weather maps
cm	—	—	—	—	—	3	—	1	—	—	—	—	—	—	—	—	—	2
mm	—	2	2	1.7	0.8	—	—	—	—	—	—	—	—	—	0.3	2	5	—
max°C	8	6	6	4	4	1	-1	0	0	3	7	7	6	4	3	4	5	1
min°C	7	6	5	3	3	-2	-1	-1	-1	2	6	6	5	3	2	2	4	-1
chill°C	6	6	3	3	3	-8	-7	-7	-6	2	3	4	2	1	-4	-4	-3	-7

Freezing level (m)	2600	2400	2250	2050	2050	1150	1100	1150	1150	1700	2700	2550	2300	2000	2300	1800	2100	1250
Cloud base (m)	2200	1900	550	400	400	400	600	400	450	600	5700	4600	2750	2000	750	650	400	500

	7:13	—	—	7:13	—	—	7:16	—	—	7:16	—	—	7:18	—	—	7:20	—	—
	—	4:29	—	—	4:28	—	—	4:27	—	—	4:25	—	—	4:24	—	—	4:23	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 7mm) at first, then becoming colder with a dusting of snow on Mon night. Freeze-thaw conditions (max 8°C on Sun morning, min -2°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 8mm) at first, then becoming colder with a dusting of snow on Fri night. Freeze-thaw conditions (max 7°C on Wed afternoon, min -1°C on Fri night). Winds increasing (calm on Wed morning, near gales from the WSW by Fri afternoon).

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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 2 hours ago	8° C	Dry	Calm (0 kph at 235).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Mist -.	Calm (0 kph at 0).	6 km Low: overcast
Auburn 39 km SW 119m alt. 59 minutes ago	3° C	Dry	Calm (0 kph at 122).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	7° C	-	Calm (0 kph at 0).	0.0 km
SHIP731 42 km WSW -m alt. 1 hour ago	11° C	-	Light winds from the N (6 kph at 0).
SHIP7360 42 km WSW 15m alt. 2 hours ago			Calm (6 kph at 10).	- km
SHIP1541 42 km WSW -m alt. 1 hour ago	11° C	-	Light winds from the N (6 kph at 0).
SHIP2993 42 km WSW 15m alt. 3 hours ago			Calm (4 kph at 330).	- km
SHIP6939 42 km WSW 15m alt. 1 hour ago			Calm (6 kph at 0).	- km
SHIP448 42 km WSW -m alt. 1 hour ago	11° C	-	Light winds from the N (6 kph at 0).

* 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.