– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Sat 06 Jun Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Sat 06 Jun Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A dusting of snow giving way to moderate rain (total 14mm) heaviest on Mon night. Freeze-thaw conditions (max 8°C on Mon afternoon, min 0°C on Sat morning). Winds increasing (calm on Mon morning, fresh winds from the WSW by Mon night).									Days 4–6 Weather Summary Moderate rain (total 12mm) heaviest on Tue morning, then becoming colder with a dusting of snow on Tue night. Very mild (max 12°C on Thu night, min 1°C on Tue night). Winds decreasing (strong winds from the WSW on Tue afternoon, light winds from the NNW by Thu morning).
	Saturday 6			Sunday 7			Monday 8			Tuesday 9			Wednesday 10			Thursday 11
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	rain shwrs	cloudy	rain shwrs	cloudy	some clouds	light rain	mod. rain	mod. rain	light rain	light snow	light snow	rain shwrs	clear	clear	clear	clear
km/h	SW	SW	W	SW	W	W	SE	NNW	WSW	SW	WSW	WSW	NW	NNW	N	NNW	NNW	N
See all weather maps
cm	1	1	—	—	—	—	—	—	—	—	—	1	1	—	—	—	—	—
mm	—	1.4	3	—	0.1	—	—	0.1	10	7	4	0.7	—	0.7	—	—	—	—
max °C	1	2	2	1	5	5	6	8	4	4	4	3	2	4	5	8	11	12
min °C	0	1	1	1	2	4	4	6	4	4	4	1	1	3	5	7	10	10
chill °C	-4	-3	-2	-5	-1	4	2	4	2	-2	-2	-4	-3	0	3	5	8	8

Freezing level m	1400	1550	1500	1400	2200	1900	2150	2250	2000	2000	1850	1500	1550	2300	3250	3200	3250	3700
Cloud base (m)	400	450	600	450	600	2550	1750	1450	400	400	550	400	450	700		8950		9550

	5:11	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—
	—	—	9:00	—	—	9:00	—	—	9:00	—	—	9:01	—	—	9:02	—	—	9:02

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of snow giving way to moderate rain (total 14mm) heaviest on Mon night. Freeze-thaw conditions (max 8°C on Mon afternoon, min 0°C on Sat morning). Winds increasing (calm on Mon morning, fresh winds from the WSW by Mon night).

Mount Si Weather (Days 3-6):

Moderate rain (total 12mm) heaviest on Tue morning, then becoming colder with a dusting of snow on Tue night. Very mild (max 12°C on Thu night, min 1°C on Tue night). Winds decreasing (strong winds from the WSW on Tue afternoon, light winds from the NNW by Thu 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. 1 hour ago	14° C	Dry	Calm (0 kph at 335).
Snoqualmie Pass 30 km ESE 824m alt. 37 minutes ago	8° C	-	Calm (0 kph at 197).
Renton 30 km WSW 160m alt. 3 hours ago	14° C	Dry	Calm (5 kph at 194).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (10 kph from 352 degs) was rejected.
Grotto wx 35 km NE 321m alt. 2 hours ago	12° C	Dry	Light winds from the WSW (6 kph at 251).
Renton Airport 36 km WSW 218m alt. 2 hours ago	17° C	Dry and partly cloudy.	Light winds from the SSW (19 kph at 200).	16 km Low: few Mid: scattered High: broken
Auburn 39 km SW 119m alt. 2 hours ago		-	Calm (0 kph at 159).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	2° C	Light rain .	Wind obs. (11 kph from 1 degs) was rejected.	5 km Mid: few High: broken
SHIP3676 43 km W 15m alt. 3 hours ago				- km
SHIP6347 43 km W 15m alt. 3 hours ago				- 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.