– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Fri 24 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Fri 24 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Some drizzle, heaviest during Sun night. Mild temperatures (max 7°C on Sun afternoon, min 1°C on Mon morning). Winds increasing (calm on Sat morning, fresh winds from the SW by Mon afternoon).										Days 5–7 Weather Summary Light rain (total 5mm), mostly falling on Thu afternoon. Freeze-thaw conditions (max 9°C on Wed night, min 0°C on Mon night). Winds decreasing (fresh winds from the SW on Mon night, calm by Wed afternoon).
		Saturday 25			Sunday 26			Monday 27			Tuesday 28			Wednesday 29			Thursday 30
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	rain shwrs	rain shwrs	some clouds	rain shwrs	rain shwrs	some clouds	cloudy	cloudy	cloudy	some clouds	rain shwrs	clear	clear	cloudy	some clouds	mod. rain	mod. snow
km/h	N	NNW	N	NNW	NW	NW	SW	SW	SW	SSW	SW	W	N	E	NW	ESE	SE	W	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	6
mm	—	—	0.1	0.1	—	0.2	0.9	—	—	—	—	—	0.2	—	—	—	—	5	11
max °C	4	4	6	5	5	7	6	2	2	1	0	2	2	4	8	9	9	8	4
min °C	4	4	5	4	5	7	3	1	1	0	0	1	1	3	7	8	8	5	1
chill °C	0	3	2	3	3	4	0	-3	-5	-7	-6	-2	-1	1	7	5	5	3	-2

Freezing level m	1800	1800	1900	1850	1900	2050	1900	1450	1500	1200	1300	1500	1500	1950	2500	2600	2350	2200	1650
Cloud base (m)		7950	2100		2700	2450	2450	550	600	450	450	500	750	950	2100	6700	2150	900	400

	—	6:00	—	—	5:58	—	—	5:56	—	—	5:54	—	—	5:52	—	—	5:52	—	—
	—	—	—	8:09	—	—	8:10	—	—	8:12	—	—	8:14	—	—	8:15	—	—	8:16

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Some drizzle, heaviest during Sun night. Mild temperatures (max 7°C on Sun afternoon, min 1°C on Mon morning). Winds increasing (calm on Sat morning, fresh winds from the SW by Mon afternoon).

Mount Si Weather (Days 3-6):

Light rain (total 5mm), mostly falling on Thu afternoon. Freeze-thaw conditions (max 9°C on Wed night, min 0°C on Mon night). Winds decreasing (fresh winds from the SW on Mon night, calm by Wed 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 56 minutes ago	6° C	Dry	Calm (0 kph at 2).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	-2° C	-	Calm (0 kph at 92).
Renton 30 km WSW 160m alt. 49 minutes ago	6° C	Dry	Calm (0 kph at 44).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 58 minutes ago	4° C	Dry	Light winds from the ENE (6 kph at 68).
Renton Airport 36 km WSW 218m alt. 3 hours ago	9° C	Clear	Calm (0 kph at 0).	16 km
Grotto wx 39 km NE 1101m alt. 59 minutes ago	-1° C	-	Calm (2 kph at 352).
Auburn 39 km SW 119m alt. 1 hour ago	11° C	Dry	Calm (0 kph at 286).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	3° C	Clear	Calm (0 kph at 0).	16 km
SHIP10303 42 km WSW 3m alt. 3 hours ago	12° C		Calm (0 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.