– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Tue 27 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Tue 27 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A moderate fall of snow heaviest on Tue night. Turning milder with heavy rain (total 21mm), heaviest during Thu morning. Freeze-thaw conditions (max 5°C on Thu night, min 0°C on Tue night). Mainly strong winds.										Days 5–7 Weather Summary Light rain (total 8mm) at first, then becoming colder with a dusting of snow on Sun night. Freeze-thaw conditions (max 9°C on Sat night, min 0°C on Sun night). Mainly near gales.
		Wednesday 28			Thursday 29			Friday 30			Saturday 31			Sunday 1			Monday 2
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	some clouds	light snow	light snow	mod. rain	light rain	light rain	light rain	rain shwrs	light rain	light rain	light rain	some clouds	cloudy	light rain	light snow	some clouds	some clouds	some clouds
km/h	SSW	SW	SW	SSW	S	SW	SSE	SSW	SSW	SW	S	SSW	ESE	SSE	SSW	WSW	WSW	WSW	W
See all weather maps
cm	3	—	3	5	—	—	—	—	—	—	—	—	—	—	—	3	—	—	—
mm	—	—	—	7	8	0.2	1.3	2	2	0.2	1	0.1	—	—	0.5	6	—	—	—
max °C	2	1	1	2	2	4	5	4	4	6	7	8	9	8	5	2	0	0	2
min °C	0	1	1	2	2	3	4	3	3	5	5	7	7	7	3	0	0	0	0
chill °C	-6	-5	-6	-4	-3	-2	1	-1	-2	1	2	4	3	6	0	-6	-6	-4	-2

Freezing level m	1450	1350	1450	1700	1700	1950	2150	1950	2000	2450	2300	2350	2500	2400	2000	1400	1250	1350	1500
Cloud base (m)	1750	500	600	450	450	600	450	900	650	950	1550	800	2450	3000	2550	450	600	850	5800

	—	7:37	—	—	7:35	—	—	7:35	—	—	7:33	—	—	7:31	—	—	7:31	—	—
	—	—	5:01	—	—	5:04	—	—	5:05	—	—	5:07	—	—	5:07	—	—	5:09	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A moderate fall of snow heaviest on Tue night. Turning milder with heavy rain (total 21mm), heaviest during Thu morning. Freeze-thaw conditions (max 5°C on Thu night, min 0°C on Tue night). Mainly strong winds.

Mount Si Weather (Days 3-6):

Light rain (total 8mm) at first, then becoming colder with a dusting of snow on Sun night. Freeze-thaw conditions (max 9°C on Sat night, min 0°C on Sun night). Mainly near gales.

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
Renton Airport 36 km WSW 218m alt. 3 hours ago	8° C	Dry and cloudy.	Wind obs. (9 kph from 180 degs) was rejected.	16 km Low: overcast
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 155).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	-4° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken Mid: broken
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	7° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	7° C	Dry and cloudy.	Light winds from the SE (11 kph at 130).	16 km Low: broken Mid: overcast
Snohomish 49 km NW 196m alt. 56 minutes ago	7° C	Dry	Calm (0 kph at 271).
SHIP6986 54 km W 15m alt. 3 hours ago			Light winds from the SE (13 kph at 140).	- km
SHIP6648 54 km W 15m alt. 2 hours ago			Calm (6 kph at 170).	- km
SHIP3689 54 km W 15m alt. 3 hours ago			Light winds from the SE (13 kph at 140).	- km
SHIP5735 54 km W 15m alt. 3 hours ago			Light winds from the SSE (12 kph at 160).	- 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.