– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Sat 18 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Sat 18 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 14°C on Sun afternoon, min 5°C on Sat morning). Wind will be generally light.									Days 4–6 Weather Summary Moderate rain (total 16mm) heaviest on Tue night, then becoming colder with a dusting of snow on Wed night. Freeze-thaw conditions (max 8°C on Tue morning, min 0°C on Wed night). Wind will be generally light.
	Saturday 18			Sunday 19			Monday 20			Tuesday 21			Wednesday 22			Thursday 23
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	light rain	mod. rain	light rain	light rain	light snow	cloudy	rain shwrs	clear
km/h	SE	ESE	ESE	ESE	ESE	ENE	ESE	NW	SW	WSW	W	NW	SW	WSW	SW	WNW	NW	N
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	0.2	8	4	2	1.3	—	0.1	—
max °C	6	10	11	12	14	13	13	13	13	8	6	5	3	3	2	1	4	4
min °C	5	8	9	11	12	11	13	13	7	7	6	4	2	3	0	0	2	4
chill °C	3	6	8	9	10	11	12	13	6	7	4	1	-3	-1	-5	-3	0	3

Freezing level m	2350	2600	2850	3050	3050	3100	3200	3150	3150	3100	2800	2650	1900	2000	1350	1400	1850	2100
Cloud base (m)		2800	5950	3850	4300	6000	3800		5300	550	750	400	400	400	450	650	850

	6:13	—	—	6:11	—	—	6:09	—	—	6:07	—	—	6:05	—	—	6:03	—	—
	—	—	8:00	—	—	8:00	—	—	8:02	—	—	8:04	—	—	8:05	—	—	8:07

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 14°C on Sun afternoon, min 5°C on Sat morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 16mm) heaviest on Tue night, then becoming colder with a dusting of snow on Wed night. Freeze-thaw conditions (max 8°C on Tue morning, min 0°C on Wed night). 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	17° C	Dry	Calm (0 kph at 346).
Snoqualmie Pass 30 km ESE 824m alt. 33 minutes ago	13° C	-	Calm (0 kph at 221).
Renton 30 km WSW 160m alt. 59 minutes ago	16° C	Dry	Calm (2 kph at 327).
Grotto wx 35 km NE 321m alt. 1 hour ago	17° C	Dry	Calm (3 kph at 158).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Clear	Light winds from the N (9 kph at 0).	16 km
Grotto wx 39 km NE 1101m alt. 57 minutes ago	12° C	Dry	Calm (2 kph at 244).
Auburn 39 km SW 119m alt. 1 hour ago	17° C	Dry	Calm (0 kph at 153).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	-	Wind obs. (6 kph from 1 degs) was rejected.	16 km Low: few
Woodinville 43 km WNW 137.2m alt. 2 hours ago	9° C	Dry	Light winds from the SSE (10 kph at 165).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	14° C	Clear	Light winds from the NW (7 kph at 320).	16 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.