– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Mon 20 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 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 fall of snow, heaviest on Wed morning. Turning milder with light rain (total 5mm) on Wed afternoon. Freeze-thaw conditions (max 14°C on Mon morning, min 0°C on Wed night). Winds increasing (calm on Mon night, fresh winds from the WSW by Wed morning).									Days 4–6 Weather Summary Light rain (total 2mm), mostly falling on Sat afternoon. Freeze-thaw conditions (max 8°C on Fri afternoon, min 0°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	some clouds	some clouds	light rain	light snow	mod. snow	light snow	light rain	cloudy	rain shwrs	clear	some clouds	rain shwrs	rain shwrs	some clouds	risk tstorm	rain shwrs
km/h	ESE	WSW	NE	SW	WSW	SW	WSW	WSW	WSW	NW	N	N	SE	NW	N	NNE	NNW	ESE
See all weather maps
cm	—	—	—	—	—	4	6	1	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	0.3	1.3	—	1.9	1.3	—	0.1	—	—	0.1	0.3	—	0.8	1
max °C	14	14	11	6	4	3	1	2	3	1	3	5	6	8	7	8	8	7
min °C	14	12	9	4	3	1	1	1	0	0	1	5	6	7	6	7	8	5
chill °C	13	11	9	1	0	-5	-5	-6	-4	-4	-2	3	5	7	6	6	6	5

Freezing level m	3150	3050	3100	2900	2250	1800	1500	1700	1400	1450	1750	2200	2200	2300	2250	2150	2200	2100
Cloud base (m)	4350		6150	800	550	400	400	400	450	450			6000	5100	3400	2950	2400	2000

	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 fall of snow, heaviest on Wed morning. Turning milder with light rain (total 5mm) on Wed afternoon. Freeze-thaw conditions (max 14°C on Mon morning, min 0°C on Wed night). Winds increasing (calm on Mon night, fresh winds from the WSW by Wed morning).

Mount Si Weather (Days 3-6):

Light rain (total 2mm), mostly falling on Sat afternoon. Freeze-thaw conditions (max 8°C on Fri afternoon, min 0°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. 1 hour ago	12° C	Dry	Calm (0 kph at 347).
Snoqualmie Pass 30 km ESE 824m alt. 40 minutes ago	6° C	-	Calm (0 kph at 134).
Renton 30 km WSW 160m alt. 1 hour ago	13° C	Dry	Calm (0 kph at 56).
Grotto wx 35 km NE 321m alt. 1 hour ago	11° C	Dry	Light winds from the ENE (6 kph at 71).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Clear	Light winds from the N (11 kph at 350).	16 km
Grotto wx 39 km NE 1101m alt. 48 minutes ago	13° C	Dry	Calm (0 kph at 343).
Auburn 39 km SW 119m alt. 1 hour ago	18° C	Dry	Calm (0 kph at 191).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	8° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Woodinville 43 km WNW 137.2m alt. 1 hour ago	7° C	Dry	Calm (0 kph at 359).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13° C	Clear	Light winds from the N (7 kph at 1).	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.