– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Mon 20 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Mon 20 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A light covering of new snow mostly falling on Wed morning. Becoming milder with light rain (total 8mm) on Wed afternoon. Freeze-thaw conditions (max 15°C on Mon afternoon, min -1°C on Wed night). Winds increasing (calm on Tue morning, fresh winds from the WSW by Wed afternoon).									Days 4–6 Weather Summary Light rain (total 3mm), mostly falling on Sat afternoon. Freeze-thaw conditions (max 8°C on Fri afternoon, min -1°C on Thu morning). Wind will be generally light.
	Monday 20			Tuesday 21			Wednesday 22			Thursday 23			Friday 24			Saturday 25
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	cloudy	rain shwrs	cloudy	light rain	light snow	light snow	light rain	light snow	cloudy	some clouds	clear	clear	some clouds	some clouds	clear	risk tstorm	rain shwrs
km/h	ESE	WSW	NE	SW	WSW	SW	SW	WSW	SW	WNW	NW	N	NNE	NNW	W	N	NNE	WSW
See all weather maps
cm	—	—	—	—	—	1	5	—	1	—	—	—	—	—	—	—	—	—
mm	—	—	0.1	—	0.8	3	—	4	—	—	—	—	—	—	—	—	1.9	1.4
max °C	14	15	11	8	5	3	1	3	1	0	3	4	7	8	7	7	8	7
min °C	14	12	10	5	4	2	1	2	-1	-1	1	3	6	7	6	7	7	6
chill °C	13	11	10	3	0	-2	-5	-4	-6	-4	-1	1	5	5	6	7	6	6

Freezing level m	3150	3050	3100	3050	2450	1950	1500	1950	1200	1300	1650	2000	2200	2300	2200	2200	2150	2200
Cloud base (m)	4300		5250	600	650	400	400	400	450	500	750			2400	3200	2500	2050

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

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A light covering of new snow mostly falling on Wed morning. Becoming milder with light rain (total 8mm) on Wed afternoon. Freeze-thaw conditions (max 15°C on Mon afternoon, min -1°C on Wed night). Winds increasing (calm on Tue morning, fresh winds from the WSW by Wed afternoon).

Mount Si Weather (Days 3-6):

Light rain (total 3mm), mostly falling on Sat afternoon. Freeze-thaw conditions (max 8°C on Fri afternoon, min -1°C on Thu morning). Wind will be generally light.

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	24° C	Dry	Calm (0 kph at 114).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	17° C	-	Calm (0 kph at 63).
Renton 30 km WSW 160m alt. 53 minutes ago	22° C	Dry	Calm (2 kph at 68).
Grotto wx 35 km NE 321m alt. 1 hour ago	23° C	Dry	Light winds from the W (13 kph at 261).
Renton Airport 36 km WSW 218m alt. 2 hours ago	19° C	Clear	Light winds from the NNW (11 kph at 340).	16 km
Grotto wx 39 km NE 1101m alt. 27 minutes ago	18° C	Dry	Calm (0 kph at 31).
Auburn 39 km SW 119m alt. 1 hour ago	27° C	Dry	Calm (0 kph at 221).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	13° C	Clear	Calm (0 kph at 0).	16 km
Woodinville 43 km WNW 137.2m alt. 30 minutes ago	21° C	Dry	Wind obs. (10 kph from 135 degs) was rejected.
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	19° C	Dry and partly cloudy.	Light winds from the WNW (7 kph at 290).	16 km Low: broken

* 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.