– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Fri 02 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Fri 02 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 29mm), heaviest during Sat morning. Mild temperatures (max 8°C on Fri morning, min 3°C on Sun night). Wind will be generally light.									Days 4–6 Weather Summary Mild at first with light rain (total 5mm) on Mon afternoon followed by colder weather and light fall of snow, heaviest on Tue morning. Freeze-thaw conditions (max 4°C on Mon morning, min 0°C on Wed afternoon). Wind will be generally light.
	Friday 2			Saturday 3			Sunday 4			Monday 5			Tuesday 6			Wednesday 7
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	light rain	light rain	rain shwrs	light rain	light rain	mod. rain	light rain	mod. rain	rain shwrs	light rain	some clouds	light snow	light snow	light snow	light rain	light snow	light snow
km/h	SW	SSE	ESE	S	SSE	SSE	SW	SW	SW	SSW	WSW	SW	SW	SSW	SW	SSW	SSW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	2	3	5	—	2	2
mm	0.9	3	1.4	6	0.1	4	6	0.9	7	1.6	2	—	—	—	—	0.7	—	—
max °C	8	8	8	8	7	7	5	5	4	4	3	1	1	2	1	2	1	0
min °C	7	8	7	6	7	6	5	4	3	3	2	1	1	2	1	1	0	0
chill °C	6	7	5	4	5	3	1	2	0	0	-1	-2	-3	-2	-3	-2	-4	-2

Freezing level m	2000	2050	2300	1650	1900	1900	1250	1150	1000	900	850	600	700	750	600	650	600	550
Cloud base (m)	450	400	2150	450	650	650	400	400	400	450	600	550	600	350	400	450	650	400

	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—	7:54	—	—	7:52	—	—
	—	4:27	—	—	4:28	—	—	4:29	—	—	4:30	—	—	4:31	—	—	4:32	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 29mm), heaviest during Sat morning. Mild temperatures (max 8°C on Fri morning, min 3°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mild at first with light rain (total 5mm) on Mon afternoon followed by colder weather and light fall of snow, heaviest on Tue morning. Freeze-thaw conditions (max 4°C on Mon morning, min 0°C on Wed 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. 27 minutes ago	8° C	Dry	Calm (0 kph at 338).
Black Diamond 32 km SSW 192m alt. 39 minutes ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Mist -.	Calm (0 kph at 0).	6 km Low: broken Mid: overcast
Auburn 39 km SW 119m alt. 1 hour ago	14° C	Dry	Calm (5 kph at 19).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	0° C	Moderate rain .	Calm (0 kph at 0).	0 km
SHIP3451 43 km W 15m alt. 2 hours ago			Calm (2 kph at 100).	- km
SHIP4243 43 km W 15m alt. 3 hours ago			Calm (2 kph at 90).	- km
SHIP3921 43 km W 15m alt. 3 hours ago			Calm (2 kph at 90).	- km
SHIP6149 43 km W 15m alt. 2 hours ago			Calm (2 kph at 100).	- km
SHIP10368 43 km W 15m alt. 3 hours ago			Calm (2 kph at 90).	- 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.