– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Wed 31 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Wed 31 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 32mm), heaviest during Thu night. Mild temperatures (max 9°C on Thu morning, min 5°C on Wed night). Wind will be generally light.										Days 5–7 Weather Summary Moderate rain (total 12mm), heaviest on Sun morning. Mild temperatures (max 8°C on Sat night, min 3°C on Tue afternoon). Wind will be generally light.
		Thursday 1			Friday 2			Saturday 3			Sunday 4			Monday 5			Tuesday 6
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	cloudy	light rain	heavy rain	mod. rain	light rain	light rain	cloudy	rain shwrs	light rain	light rain	rain shwrs	rain shwrs	light rain	rain shwrs	light rain	light rain	light rain	light rain
km/h	SE	SE	ESE	SSW	SSW	SW	ESE	ESE	S	ESE	ESE	ESE	SW	SW	SSW	WSW	SW	SW	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	1.1	17	9	1.5	0.9	—	2	1.5	2	1.2	1.8	0.6	1.1	0.8	1.3	1.7	5
max °C	6	9	6	7	8	8	8	9	7	8	7	7	6	6	6	5	4	4	2
min °C	5	7	6	6	7	8	7	8	7	7	7	6	5	5	5	4	4	3	2
chill °C	3	6	5	5	4	6	6	6	5	5	5	4	4	5	4	2	2	0	-2

Freezing level m	3150	2500	2300	2300	2150	1900	2100	2150	1900	1850	1700	1900	1500	1400	1400	1250	1200	1150	850
Cloud base (m)	4850	4600	2550	400	400	400	500	2050	800	1650	750	450	500	1500	500	600	400	400	750

	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—
	—	—	4:25	—	—	4:27	—	—	4:28	—	—	4:29	—	—	4:30	—	—	4:31	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 32mm), heaviest during Thu night. Mild temperatures (max 9°C on Thu morning, min 5°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 12mm), heaviest on Sun morning. Mild temperatures (max 8°C on Sat night, min 3°C on Tue afternoon). 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	-1° C	-	Calm (0 kph at 345).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (5 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	1° C	Fog -.	Calm (0 kph at 0).	0 km
Auburn 39 km SW 119m alt. 1 hour ago	4° C	Dry	Calm (0 kph at 148).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-6° C	-	Wind obs. (7 kph from 1 degs) was rejected.	16 km
SHIP1217 43 km W -m alt. 49 minutes ago	2° C	-	Light winds from the N (6 kph at 350).
SHIP6135 43 km W 15m alt. 2 hours ago			Calm (6 kph at 300).	- km
SHIP9003 43 km W 15m alt. 3 hours ago			Calm (4 kph at 320).	- km
SHIP3625 43 km W 15m alt. 3 hours ago			Calm (6 kph at 280).	- km
SHIP3024 43 km W 15m alt. 2 hours ago			Calm (4 kph at 330).	- 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.