– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 am Wed 31 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 3 am Wed 31 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 16mm), heaviest on Fri morning. Very mild (max 10°C on Wed morning, min 5°C on Wed night). Wind will be generally light.									Days 4–6 Weather Summary Heavy rain (total 21mm), heaviest during Mon night. Very mild (max 10°C on Sun morning, min 4°C on Mon night). Wind will be generally light.
	Wednesday 31			Thursday 1			Friday 2			Saturday 3			Sunday 4			Monday 5
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	some clouds	cloudy	cloudy	light rain	mod. rain	light rain	light rain	rain shwrs	light rain	light rain	rain shwrs	cloudy	mod. rain	rain shwrs	cloudy	heavy rain
km/h	SE	SE	SE	SE	S	SE	SSW	SW	SE	SE	ESE	ESE	SE	SE	ESE	SSW	ENE	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	5	8	2	0.8	0.2	0.1	1.9	0.2	—	5	0.3	—	13
max °C	10	8	6	9	8	6	7	8	8	9	8	8	10	9	8	9	9	7
min °C	7	6	5	7	6	5	6	8	7	8	7	6	8	8	7	8	7	4
chill °C	6	5	4	6	6	4	4	6	5	7	5	4	6	5	5	7	6	2

Freezing level m	3250	3200	3150	2600	2150	1750	1950	1850	2000	2050	1950	2200	2000	2150	2050	1750	2050	1500
Cloud base (m)	5700	5350		5000	3050	600	400	450	400	750	1700	2700	600	1900	1650	550	5600	600

	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—
	—	4:24	—	—	4:25	—	—	4:27	—	—	4:28	—	—	4:29	—	—	4:30	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 16mm), heaviest on Fri morning. Very mild (max 10°C on Wed morning, min 5°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 21mm), heaviest during Mon night. Very mild (max 10°C on Sun morning, min 4°C on Mon night). 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. 51 minutes ago	0° C	-	Calm (0 kph at 8).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	0° C	Fog -.	Calm (0 kph at 0).	0 km
Auburn 39 km SW 119m alt. 56 minutes ago	0° C	-	Calm (0 kph at 159).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-7° C	-	Light winds from the N (7 kph at 1).	16 km
SHIP5876 42 km WSW 15m alt. 3 hours ago				- km
SHIP5546 42 km WSW 3m alt. 3 hours ago	2° C
SHIP2614 42 km WSW 15m alt. 2 hours ago				- km
SHIP3890 42 km WSW 15m alt. 1 hour ago				- km
SHIP3559 42 km WSW 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.