– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Sun 19 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Sun 19 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Light rain (total 9mm), mostly falling on Tue afternoon. Very mild (max 13°C on Sun afternoon, min 3°C on Tue night). Wind will be generally light.									Days 4–6 Weather Summary Drizzle at first, then turning colder with dusting of snow on Wed afternoon. Freeze-thaw conditions (max 8°C on Fri morning, min 0°C on Wed night). Winds decreasing (fresh winds from the SW on Wed morning, calm by Fri morning).
	Sunday 19			Monday 20			Tuesday 21			Wednesday 22			Thursday 23			Friday 24
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	some clouds	some clouds	some clouds	some clouds	clear	some clouds	mod. rain	light rain	light rain	light snow	cloudy	some clouds	rain shwrs	clear	cloudy	some clouds	some clouds
km/h	ESE	ESE	ENE	ESE	W	NNE	W	W	WSW	SW	SW	WSW	NNW	N	N	N	NW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	1	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	5	4	1.8	—	—	—	0.1	—	—	—	—
max °C	12	13	13	13	13	10	6	4	3	3	1	1	1	6	6	8	8	8
min °C	11	13	11	13	11	7	5	4	3	2	1	0	1	3	5	6	8	7
chill °C	9	11	11	12	10	7	5	3	1	-4	-5	-5	-2	2	5	5	7	6

Freezing level m	3000	3050	3150	3200	2950	2950	3000	2500	2150	1700	1450	1300	1400	2350	2400	2500	2500	2450
Cloud base (m)	5200	3900	5750	4000		5950	550	600	400	450	450	450	600	800		5450	5650	4950

	6:11	—	—	6:09	—	—	6:07	—	—	6:05	—	—	6:03	—	—	6:01	—	—
	—	—	8:00	—	—	8:02	—	—	8:04	—	—	8:05	—	—	8:07	—	—	8:07

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 9mm), mostly falling on Tue afternoon. Very mild (max 13°C on Sun afternoon, min 3°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Drizzle at first, then turning colder with dusting of snow on Wed afternoon. Freeze-thaw conditions (max 8°C on Fri morning, min 0°C on Wed night). Winds decreasing (fresh winds from the SW on Wed morning, calm by Fri 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. 2 hours ago	11° C	Dry	Calm (0 kph at 347).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	6° C	-	Calm (0 kph at 127).
Renton 30 km WSW 160m alt. 43 minutes ago	12° C	Dry	Calm (0 kph at 314).
Upper Mill wx 33 km S 965m alt. 2 hours ago		-	Calm (0 kph at 180).
Kent 34 km SW 135.9m alt. 2 hours ago	11° C	Dry	Calm (2 kph at 309).
Grotto wx 35 km NE 321m alt. 2 hours ago	12° C	Dry	Wind obs. (6 kph from 47 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 3 hours ago	9° C	Clear	Light winds from the N (11 kph at 0).	16 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	10° C	Dry	Calm (2 kph at 344).
Auburn 39 km SW 119m alt. 1 hour ago	18° C	Dry	Calm (0 kph at 197).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	3° C	Clear	Calm (0 kph at 0).	16 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.