– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Thu 09 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Thu 09 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 4mm), mostly falling on Fri night. Very mild (max 16°C on Thu afternoon, min 7°C on Sat morning). Wind will be generally light.									Days 4–6 Weather Summary Heavy rain (total 35mm), heaviest during Tue night. Later becoming colder with a dusting of snow on Tue night. Mild temperatures (max 8°C on Sun afternoon, min 2°C on Tue night). Wind will be generally light.
	Thursday 9			Friday 10			Saturday 11			Sunday 12			Monday 13			Tuesday 14
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	some clouds	some clouds	cloudy	rain shwrs	light rain	rain shwrs	some clouds	light rain	light rain	light rain	light rain	light rain	light rain	mod. rain	mod. rain	light snow
km/h	NE	NW	ESE	SW	W	SE	SW	SSW	SSE	W	WNW	SW	SW	WSW	SW	SW	SW	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	3
mm	—	—	—	—	—	1.8	1.3	0.4	—	0.2	0.8	1.8	0.7	1.4	3	7	6	14
max °C	14	16	12	15	16	11	9	8	8	7	8	7	4	6	5	3	4	4
min °C	9	16	10	12	15	9	7	7	7	7	8	4	4	5	3	3	4	2
chill °C	9	16	9	12	15	9	6	7	7	7	7	1	1	2	0	0	0	-3

Freezing level m	2650	2800	2850	2650	2550	2300	1800	1950	2000	1700	1800	1250	1050	1300	1000	1050	1100	1150
Cloud base (m)	9200	9350		3100	2200	1600	650	350	1600	500	400	400	450	400	400	400	400	400

	6:30	—	—	6:28	—	—	6:26	—	—	6:24	—	—	6:22	—	—	6:20	—	—
	—	7:46	—	—	7:49	—	—	7:50	—	—	7:51	—	—	7:52	—	—	7:53	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 4mm), mostly falling on Fri night. Very mild (max 16°C on Thu afternoon, min 7°C on Sat morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 35mm), heaviest during Tue night. Later becoming colder with a dusting of snow on Tue night. Mild temperatures (max 8°C on Sun afternoon, min 2°C on Tue 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. 42 minutes ago	13° C	Dry	Calm (0 kph at 311).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	3° C	-	Calm (0 kph at 43).
Renton 30 km WSW 160m alt. 2 hours ago	9° C	Dry	Calm (2 kph at 233).
Black Diamond 32 km SSW 192m alt. 45 minutes ago		-	Calm (5 kph at 17).
Grotto wx 35 km NE 321m alt. 28 minutes ago	14° C	Dry	Calm (3 kph at 169).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Clear	Light winds from the N (7 kph at 1).	16 km
Grotto wx 39 km NE 1101m alt. 26 minutes ago	14° C	Dry	Calm (2 kph at 169).
Auburn 39 km SW 119m alt. 3 hours ago	18° C	Dry	Calm (0 kph at 325).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	Clear	Calm (0 kph at 0).	16 km
Woodinville 43 km WNW 137.2m alt. 1 hour ago	12° C	Dry	Wind obs. (8 kph from 200 degs) was rejected.

* 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.