– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Wed 04 Feb Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Wed 04 Feb Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 16°C on Thu morning, min 5°C on Fri night). Winds increasing (calm on Wed morning, fresh winds from the SW by Fri night).									Days 4–6 Weather Summary Mild with heavy rain (total 39mm), heaviest during Sat afternoon. Becoming colder with a moderate fall of snow heaviest on Sat night. Freeze-thaw conditions (max 5°C on Sat morning, min -2°C on Mon afternoon). Mainly strong winds.
	Wednesday 4			Thursday 5			Friday 6			Saturday 7			Sunday 8			Monday 9
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	clear	clear	some clouds	some clouds	clear	clear	some clouds	some clouds	light rain	heavy rain	light snow	light snow	cloudy	light snow	light snow	light snow	light snow
km/h	SSE	S	ESE	ESE	SE	SSW	SW	SW	SW	SSW	SSW	SW	WSW	WSW	WSW	SW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	3	4	—	2	1	3	2
mm	—	—	—	—	—	—	—	—	—	5	14	21	—	—	—	—	—	—
max °C	14	13	14	16	14	10	9	9	6	5	5	5	0	0	-1	-1	-1	-2
min °C	13	12	12	15	12	9	9	7	5	4	5	1	0	0	-1	-1	-2	-2
chill °C	13	12	12	14	11	7	7	4	0	-1	0	-5	-6	-4	-7	-8	-9	-7

Freezing level m	3600	3600	3800	3850	3750	3150	2850	2600	2350	2150	2450	2200	1350	1300	1100	1050	1050	1000
Cloud base (m)	4450	7900						6400	3800	1750	400	400	450	400	450	450	500	400

	7:28	—	—	7:26	—	—	7:26	—	—	7:24	—	—	7:22	—	—	7:20	—	—
	—	5:13	—	—	5:14	—	—	5:15	—	—	5:17	—	—	5:19	—	—	5:21	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 16°C on Thu morning, min 5°C on Fri night). Winds increasing (calm on Wed morning, fresh winds from the SW by Fri night).

Mount Si Weather (Days 3-6):

Mild with heavy rain (total 39mm), heaviest during Sat afternoon. Becoming colder with a moderate fall of snow heaviest on Sat night. Freeze-thaw conditions (max 5°C on Sat morning, min -2°C on Mon afternoon). Mainly strong winds.

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. 55 minutes ago	13° C	Dry	Calm (0 kph at 333).
Black Diamond 32 km SSW 192m alt. 1 hour ago	24° C	Dry	Light winds from the E (11 kph at 86).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 355).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	2° C	Light rain .	Wind obs. (6 kph from 70 degs) was rejected.	0 km
SHIP4550 43 km W 15m alt. 2 hours ago			Light winds from the SSE (8 kph at 160).	- km
SHIP9551 43 km W 3m alt. 3 hours ago	16° C		Calm (2 kph at 140).
SHIP6662 43 km W 15m alt. 3 hours ago			Calm (2 kph at 140).	- km
SHIP2869 43 km W 15m alt. 3 hours ago			Calm (2 kph at 140).	- km
SHIP1824 43 km W 15m alt. 2 hours ago			Calm (6 kph at 180).	- 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.