– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Thu 29 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Thu 29 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 21mm), heaviest during Thu afternoon. Mild temperatures (max 9°C on Sat night, min 2°C on Sun morning). Winds decreasing (strong winds from the SSW on Fri morning, light winds from the SSW by Fri night).											Days 5–7 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 10°C on Wed morning, min 0°C on Sun night). Winds decreasing (fresh winds from the WSW on Sun night, calm by Tue morning).
	Thu 29		Friday 30			Saturday 31			Sunday 1			Monday 2			Tuesday 3
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	rain shwrs	light rain	light rain	rain shwrs	light rain	some clouds	some clouds	light rain	light snow	light snow	cloudy	light rain	cloudy	some clouds	some clouds	some clouds
km/h	SW	SSW	SSW	SW	SW	SSE	SSE	SSE	SSE	WSW	SW	SW	SW	S	ESE	SE	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	1	2	—	—	—	—	—	—
mm	5	3	0.9	5	0.4	4	—	—	3	—	—	—	0.1	—	—	—	—
max °C	3	5	5	5	6	7	8	9	4	1	1	1	2	6	9	9	9
min °C	3	4	3	4	5	6	8	5	2	1	0	0	2	3	7	9	8
chill °C	-1	0	-3	-2	2	3	6	3	-4	-5	-6	-5	-1	0	6	8	6

Freezing level m	2050	2400	2000	2050	2350	2450	2450	2500	1950	1450	1400	1350	1550	1850	2850	3100	3100
Cloud base (m)	450	450	2500	700	1000	1000	4850	5450	2500	550	600	450	900	1700	1800	6100	5350

	—	—	7:35	—	—	7:33	—	—	7:31	—	—	7:31	—	—	7:30	—	—
	5:04	—	—	5:05	—	—	5:07	—	—	5:07	—	—	5:09	—	—	5:10	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 21mm), heaviest during Thu afternoon. Mild temperatures (max 9°C on Sat night, min 2°C on Sun morning). Winds decreasing (strong winds from the SSW on Fri morning, light winds from the SSW by Fri night).

Mount Si Weather (Days 3-6):

A dusting of new snow. Freeze-thaw conditions (max 10°C on Wed morning, min 0°C on Sun night). Winds decreasing (fresh winds from the WSW on Sun night, calm by Tue morning).

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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 0).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	10° C	Light rain .	Light winds from the SSE (6 kph at 160).	16 km Low: broken Mid: overcast
Auburn 39 km SW 119m alt. 3 hours ago	12° C	Dry	Wind obs. (8 kph from 40 degs) was rejected.
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	0° C	Moderate rain .	Calm (0 kph at 0).	0 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	10° C	Light rain .	Light winds from the SSE (7 kph at 150).	8 km Mid: broken High: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 1 hour ago	10° C	Light rain .	Light winds from the ESE (11 kph at 110).	16 km Low: few Mid: broken High: overcast
Snohomish 49 km NW 196m alt. 1 hour ago	13° C	Dry	Light winds from the SE (10 kph at 141).
BUOY-WPOW1 55 km W 3m alt. 43 minutes ago	11° C		Light winds from the SSE (18 kph at 150).
BUOY-TCNW1 57 km SW 3m alt. 55 minutes ago

* 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.