– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Sun 28 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Sun 28 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Mild temperatures (max 9°C on Tue morning, min 1°C on Sun night). Wind will be generally light.										Days 5–7 Weather Summary Light rain (total 6mm) at first, then becoming colder with a dusting of snow on Sat morning. Freeze-thaw conditions (max 8°C on Wed night, min -2°C on Sat afternoon). Winds increasing (calm on Thu afternoon, strong winds from the SE by Fri night).
		Monday 29			Tuesday 30			Wednesday 31			Thursday 1			Friday 2			Saturday 3
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	cloudy	some clouds	clear	some clouds	clear	clear	some clouds	cloudy	cloudy	cloudy	rain shwrs	rain shwrs	cloudy	rain shwrs	light snow	light snow	light snow
km/h	NNE	N	NNE	ENE	SSE	S	SSW	SSE	SE	S	SSW	W	SSW	SSE	SE	SSE	SW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1	1	2
mm	—	—	—	—	—	—	—	—	—	—	—	—	0.4	0.1	—	5	—	—	—
max °C	2	4	4	7	9	8	7	8	8	8	5	4	4	5	6	5	0	-1	-2
min °C	1	3	4	5	8	8	7	8	8	5	4	2	1	5	6	1	0	-2	-3
chill °C	-2	0	2	5	7	7	6	8	8	4	2	2	-3	3	1	-3	-7	-9	-10

Freezing level m	1850	2450	2750	3150	3350	3450	3350	3300	3250	3000	2300	1950	1750	2050	2200	1800	1300	1150	900
Cloud base (m)	1000	6450		6200	7150	6400	6450	6500	8900	5250		3350	700	4800	2050	650	650	450	500

	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—
	—	—	4:22	—	—	4:23	—	—	4:24	—	—	4:25	—	—	4:27	—	—	4:28	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Mild temperatures (max 9°C on Tue morning, min 1°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 6mm) at first, then becoming colder with a dusting of snow on Sat morning. Freeze-thaw conditions (max 8°C on Wed night, min -2°C on Sat afternoon). Winds increasing (calm on Thu afternoon, strong winds from the SE by Fri night).

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. 1 hour ago	1° C	-	Calm (0 kph at 354).
Renton Airport 36 km WSW 218m alt. 2 hours ago	3° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Auburn 39 km SW 119m alt. 2 hours ago	-4° C	-	Calm (0 kph at 51).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-6° C	-	Light winds from the N (6 kph at 1).	16 km
SHIP9464 42 km WSW 15m alt. 3 hours ago				- km
SHIP4984 42 km WSW 15m alt. 3 hours ago				- km
SHIP8738 42 km WSW 15m alt. 2 hours ago				- km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	4° C	Dry and cloudy.	Light winds from the E (6 kph at 90).	16 km Low: scattered Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	4° C	Dry and cloudy.	Light winds from the NE (6 kph at 50).	16 km Low: broken Mid: overcast
Snohomish 49 km NW 196m alt. 1 hour ago	2° C	-	Calm (3 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.