– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Fri 17 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Fri 17 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 13°C on Sun afternoon, min -3°C on Fri morning). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 5mm), mostly falling on Wed morning. Freeze-thaw conditions (max 15°C on Tue morning, min -1°C on Wed night). Winds increasing (calm on Mon afternoon, fresh winds from the SW by Wed night).
	Friday 17			Saturday 18			Sunday 19			Monday 20			Tuesday 21			Wednesday 22
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	cloudy	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	light rain	light rain	light rain	light rain	cloudy
km/h	NNE	NNE	SE	SE	E	ESE	ESE	ESE	ENE	ESE	WNW	NNE	ENE	WSW	SW	SW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	0.6	0.6	2	1.7	—
max °C	-1	2	4	6	9	10	12	13	12	14	14	12	15	14	8	3	3	1
min °C	-3	1	3	5	8	9	11	12	11	13	13	12	13	10	3	3	3	-1
chill °C	-6	1	1	3	7	7	9	10	11	12	13	12	12	7	-1	-2	-3	-8

Freezing level m	1150	1550	2250	2400	2650	2800	3000	3000	3200	3250	3250	3350	3350	3200	2850	2000	1850	1150
Cloud base (m)	500	850	5400		5750		3400	3350	5000	5000	5250	5000	5300		500	400	400	400

	6:15	—	—	6:13	—	—	6:11	—	—	6:09	—	—	6:07	—	—	6:05	—	—
	—	7:58	—	—	—	8:00	—	—	8:00	—	—	8:02	—	—	8:04	—	—	8:05

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Freeze-thaw conditions (max 13°C on Sun afternoon, min -3°C on Fri morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 5mm), mostly falling on Wed morning. Freeze-thaw conditions (max 15°C on Tue morning, min -1°C on Wed night). Winds increasing (calm on Mon afternoon, fresh winds from the SW by Wed night).

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. 32 minutes ago	15° C	Dry	Calm (0 kph at 336).
Snoqualmie Pass 30 km ESE 824m alt. 38 minutes ago	11° C	-	Calm (0 kph at 281).
Renton 30 km WSW 160m alt. 58 minutes ago	13° C	Dry	Calm (5 kph at 243).
Grotto wx 35 km NE 321m alt. 1 hour ago	14° C	Dry	Wind obs. (8 kph from 244 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Clear	Light winds from the NW (15 kph at 320).	16 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	5° C	Light rain.	Calm (0 kph at 352).
Auburn 39 km SW 119m alt. 44 minutes ago	21° C	Dry	Light winds from the N (10 kph at 5).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	6° C	-	Calm (0 kph at 0).	16 km Low: few
SHIP1497 43 km W -m alt. 47 minutes ago	13° C	Clear skies.	Moderate winds from the WNW (20 kph at 300).	10 km Mid: few
Woodinville 43 km WNW 137.2m alt. 58 minutes ago	12° C	Dry	Calm (5 kph at 217).

* 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.