– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Fri 20 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Fri 20 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 9mm), mostly falling on Fri afternoon. Freeze-thaw conditions (max 9°C on Fri afternoon, min 0°C on Sat night). Wind will be generally light.											Days 5–7 Weather Summary Heavy rain (total 24mm), mostly on Tue afternoon. Becoming colder with a light covering of snow, mostly falling on Tue night. Freeze-thaw conditions (max 9°C on Tue afternoon, min -1°C on Wed night). Winds increasing (calm on Mon night, near gales from the SW by Tue night).
	Fri 20		Saturday 21			Sunday 22			Monday 23			Tuesday 24			Wednesday 25
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. rain	light rain	some clouds	rain shwrs	rain shwrs	some clouds	some clouds	some clouds	some clouds	some clouds	light rain	heavy rain	mod. rain	snow shwrs	light snow	light snow	snow shwrs
km/h	SW	W	W	WNW	S	W	WNW	ESE	WNW	W	SSW	SSE	SSW	SW	WSW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	1	2	2	2
mm	7	1.1	—	0.5	0.3	—	—	—	—	—	0.3	11	9	4	—	—	—
max °C	9	7	1	4	3	3	6	3	6	7	4	4	9	6	1	1	0
min °C	9	3	1	3	0	1	6	2	2	7	4	3	5	0	1	1	-1
chill °C	6	1	-1	2	-2	1	5	2	2	6	4	0	1	-7	-5	-4	-4

Freezing level m	1950	1200	700	1000	550	950	1200	1650	1500	1400	1550	1350	1800	650	650	600	550
Cloud base (m)	400	600	450	500	600	600	550		600	750	2250	500	450	400	500	450	500

	—	—	7:07	—	—	7:05	—	—	7:03	—	—	7:01	—	—	7:00	—	—
	7:19	—	—	7:20	—	—	7:22	—	—	7:22	—	—	7:23	—	—	7:25	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 9mm), mostly falling on Fri afternoon. Freeze-thaw conditions (max 9°C on Fri afternoon, min 0°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 24mm), mostly on Tue afternoon. Becoming colder with a light covering of snow, mostly falling on Tue night. Freeze-thaw conditions (max 9°C on Tue afternoon, min -1°C on Wed night). Winds increasing (calm on Mon night, near gales from the SW by Tue night).

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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	10° C	Dry	Calm (0 kph at 357).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	3° C	-	Calm (0 kph at 119).
Black Diamond 32 km SSW 192m alt. 40 minutes ago		-	Calm (3 kph at 0).
Grotto wx 35 km NE 321m alt. 38 minutes ago	8° C	Dry	Calm (0 kph at 119).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14° C	-	Light winds from the SW (9 kph at 220).	16 km Low: few
Grotto wx 39 km NE 1101m alt. 35 minutes ago	2° C	-	Calm (0 kph at 303).
Auburn 39 km SW 119m alt. 33 minutes ago		-	Calm (0 kph at 274).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	Light rain .	Light winds from the W.(Wind varies from 240 to 310 degs) (13 kph at 270).	5 km Mid: broken High: overcast
SHIP9008 43 km W 15m alt. 3 hours ago				- km
SHIP3077 43 km W 15m alt. 1 hour 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.