– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Fri 30 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Fri 30 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 11mm) heaviest on Fri afternoon, then becoming colder with a dusting of snow on Sun morning. Mild temperatures (max 8°C on Sat morning, min 1°C on Sun morning). Winds decreasing (strong winds from the SSW on Fri morning, calm by Sat night).									Days 4–6 Weather Summary A dusting of snow turning to light rain (total 3mm) on Mon afternoon. Very mild (max 12°C on Wed night, min 2°C on Mon morning). Winds decreasing (fresh winds from the SW on Mon afternoon, calm by Wed night).
	Friday 30			Saturday 31			Sunday 1			Monday 2			Tuesday 3			Wednesday 4
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	mod. rain	light rain	light rain	some clouds	light rain	light snow	snow shwrs	some clouds	light snow	light rain	rain shwrs	some clouds	some clouds	some clouds	clear	clear	clear
km/h	SSW	SW	SW	S	S	S	SW	SW	SW	SSE	SW	SW	SSE	SSW	SSW	SSW	WSW	NE
See all weather maps
cm	—	—	—	—	—	—	1	1	—	1	—	—	—	—	—	—	—	—
mm	3	6	0.4	0.5	—	0.6	—	—	—	—	1.7	1.6	—	—	—	—	—	—
max °C	4	5	6	8	8	6	2	2	2	2	4	6	9	9	10	11	9	12
min °C	4	4	5	7	8	2	1	1	1	2	3	4	8	8	9	11	9	10
chill °C	-2	-3	1	4	6	-1	-5	-5	-4	-2	-3	0	7	6	7	10	8	10

Freezing level m	1950	2050	2250	2550	2450	2150	1600	1500	1400	1500	2000	2000	2850	2900	3250	3300	3000	3350
Cloud base (m)	2450	550	700	950	5100	3400	600	450	950	2050	650	550	5300	5350	5600			8900

	7:35	—	—	7:33	—	—	7:31	—	—	7:31	—	—	7:30	—	—	7:28	—	—
	—	5:05	—	—	5:07	—	—	5:07	—	—	5:09	—	—	5:10	—	—	5:13	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 11mm) heaviest on Fri afternoon, then becoming colder with a dusting of snow on Sun morning. Mild temperatures (max 8°C on Sat morning, min 1°C on Sun morning). Winds decreasing (strong winds from the SSW on Fri morning, calm by Sat night).

Mount Si Weather (Days 3-6):

A dusting of snow turning to light rain (total 3mm) on Mon afternoon. Very mild (max 12°C on Wed night, min 2°C on Mon morning). Winds decreasing (fresh winds from the SW on Mon afternoon, calm by Wed night).

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. 3 hours ago	13° C	Dry	Calm (0 kph at 118).
Black Diamond 32 km SSW 192m alt. 45 minutes ago	18° C	Dry	Calm (3 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Light rain .	Calm (0 kph at 0).	14 km Low: overcast
Auburn 39 km SW 119m alt. 48 minutes ago	9° C	Dry	Calm (3 kph at 26).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	1° C	Moderate rain .	Calm (0 kph at 0).	0 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	9° C	Light rain .	Light winds from the SE (6 kph at 130).	10 km Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	10° C	Light rain .	Light winds from the ESE (9 kph at 110).	10 km Low: few Mid: overcast
Snohomish 49 km NW 196m alt. 2 hours ago	11° C	Dry	Calm (3 kph at 128).
Seattle 49 km WSW 100m alt. 2 hours ago	13° C	-	Wind obs. (13 kph from 157 degs) was rejected.
SHIP7643 54 km W 15m alt. 2 hours ago			Light winds from the ESE (8 kph at 120).	- 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.