– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Tue 07 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Tue 07 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Freeze-thaw conditions (max 9°C on Thu afternoon, min -2°C on Tue morning). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 3mm) at first, then becoming colder with a dusting of snow on Sat night. Freeze-thaw conditions (max 10°C on Fri morning, min 0°C on Sun morning). Wind will be generally light.
	Tuesday 7			Wednesday 8			Thursday 9			Friday 10			Saturday 11			Sunday 12
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	some clouds	light rain	light rain	light snow	cloudy	cloudy	light snow
km/h	WSW	WSW	SW	SW	W	N	ESE	ENE	SE	S	W	W	E	WNW	SW	SW	SW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2	—	—	2
mm	—	—	—	—	—	—	—	—	—	—	—	—	1.4	0.7	1	—	—	—
max °C	-2	2	2	3	5	4	7	9	9	10	10	9	5	5	3	0	0	0
min °C	-2	1	1	2	4	3	5	9	9	9	10	6	5	4	1	0	0	0
chill °C	-8	-2	1	0	2	3	3	9	9	8	10	6	5	2	-3	-5	-5	-5

Freezing level m	1100	1700	1750	1950	2150	2350	2550	2650	2750	2750	2750	2500	2200	2000	1650	1250	1250	1350
Cloud base (m)	500	850				9150				9250		2450	550	350	350	400	400	400

	6:33	—	—	6:31	—	—	6:30	—	—	6:28	—	—	6:26	—	—	6:24	—	—
	—	7:44	—	—	7:45	—	—	7:46	—	—	7:49	—	—	7:50	—	—	7:51	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Freeze-thaw conditions (max 9°C on Thu afternoon, min -2°C on Tue morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 3mm) at first, then becoming colder with a dusting of snow on Sat night. Freeze-thaw conditions (max 10°C on Fri morning, min 0°C on Sun morning). Wind will be generally light.

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. 1 hour ago	3° C	Dry	Calm (0 kph at 317).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	-1° C	-	Calm (0 kph at 27).
Renton 30 km WSW 160m alt. 2 hours ago	6° C	Dry	Calm (2 kph at 292).
Black Diamond 32 km SSW 192m alt. 54 minutes ago		-	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 2 hours ago	8° C	Dry	Light winds from the W (18 kph at 270).
Renton Airport 36 km WSW 218m alt. 2 hours ago	9° C	Dry and cloudy.	Light winds from the WSW (7 kph at 240).	16 km Low: scattered Mid: overcast
Grotto wx 39 km NE 1101m alt. 38 minutes ago	0° C	-	Calm (0 kph at 56).
Auburn 39 km SW 119m alt. 33 minutes ago	8° C	Dry	Calm (0 kph at 219).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	0° C	Clear	Light winds from the W.(Wind varies from 250 to 350 degs) (15 kph at 280).	16 km
SHIP3731 42 km WSW 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.