– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Wed 18 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Wed 18 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 67mm), heaviest during Thu night. Later becoming colder with a dusting of snow on Sat morning. Very mild (max 11°C on Wed afternoon, min 1°C on Sat morning). Wind will be generally light.											Days 5–7 Weather Summary Heavy rain (total 27mm), heaviest during Tue morning. Freeze-thaw conditions (max 10°C on Mon afternoon, min 0°C on Sat night). Wind will be generally light.
	Wed 18		Thursday 19			Friday 20			Saturday 21			Sunday 22			Monday 23
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	mod. rain	mod. rain	light rain	heavy rain	heavy rain	heavy rain	mod. rain	light snow	rain shwrs	some clouds	some clouds	some clouds	cloudy	cloudy	cloudy	mod. rain
km/h	SSW	SW	SW	SW	SW	WSW	SW	W	NW	WNW	W	SW	WNW	ESE	S	SSE	S
See all weather maps
cm	—	—	—	—	—	—	—	—	1	—	—	—	—	—	—	—	—
mm	3	9	8	3	17	10	12	5	—	0.4	—	—	—	—	—	—	8
max °C	11	10	10	11	10	10	9	8	1	3	2	5	7	5	8	10	7
min °C	10	10	10	10	10	10	9	2	1	2	0	0	7	4	5	9	7
chill °C	8	8	8	8	8	8	7	0	-1	0	0	0	7	4	5	8	6

Freezing level m	2900	2500	2600	2750	2600	2600	2200	1100	650	900	650	1250	1350	2000	1900	1900	2300
Cloud base (m)	400	450	450	450	400	400	400	450	450	500	650	500	700	4700	2950	2200	500

	—	—	7:11	—	—	7:09	—	—	7:07	—	—	7:05	—	—	7:03	—	—
	7:15	—	—	7:16	—	—	7:19	—	—	7:20	—	—	7:22	—	—	7:22	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 67mm), heaviest during Thu night. Later becoming colder with a dusting of snow on Sat morning. Very mild (max 11°C on Wed afternoon, min 1°C on Sat morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 27mm), heaviest during Tue morning. Freeze-thaw conditions (max 10°C on Mon afternoon, min 0°C on Sat night). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 500 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	12° C	Dry	Calm (0 kph at 359).
Snoqualmie Pass 30 km ESE 824m alt. 56 minutes ago	3° C	-	Calm (0 kph at 29).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (3 kph at 254).
Grotto wx 35 km NE 321m alt. 1 hour ago	6° C	Dry	Calm (2 kph at 44).
Renton Airport 36 km WSW 218m alt. 2 hours ago	11° C	Dry and cloudy.	Light winds from the SSE (11 kph at 160).	16 km Low: broken Mid: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	2° C	-	Calm (0 kph at 321).
Auburn 39 km SW 119m alt. 2 hours ago	12° C	Dry	Calm (0 kph at 221).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	4° C	Light rain .	Calm (0 kph at 0).	1 km Mid: scattered High: broken
Woodinville 43 km WNW 137.2m alt. 1 hour ago	8° C	Dry	Calm (3 kph at 5).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	11° C	Light rain .	Light winds from the SSE (17 kph at 160).	10 km Mid: broken High: overcast

* 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.