– Lat/Long: 47.51° N 121.74° W

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

Issued: 10 pm Sat 18 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 4mm), mostly falling on Tue afternoon. Very mild (max 13°C on Sun afternoon, min 4°C on Tue morning). Wind will be generally light.										Days 5–7 Weather Summary Light rain (total 9mm), mostly falling on Wed morning. Mild temperatures (max 8°C on Fri morning, min 1°C on Wed night). Wind will be generally light.
		Sunday 19			Monday 20			Tuesday 21			Wednesday 22			Thursday 23			Friday 24
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

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

Freezing level m	2900	3050	3100	3150	3200	3000	3150	3100	2350	2550	1800	1800	1450	1450	2450	2550	2600	2650	2600
Cloud base (m)	8400	5500	4250	6350	4000		9300	500	550	400	400	400	450	750	8350		6150	5350

	—	6:11	—	—	6:09	—	—	6:07	—	—	6:05	—	—	6:03	—	—	6:01	—	—
	—	—	—	8:00	—	—	8:02	—	—	8:04	—	—	8:05	—	—	8:07	—	—	8:07

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 4mm), mostly falling on Tue afternoon. Very mild (max 13°C on Sun afternoon, min 4°C on Tue morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 9mm), mostly falling on Wed morning. Mild temperatures (max 8°C on Fri morning, min 1°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. 58 minutes ago	8° C	Dry	Calm (0 kph at 342).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	-1° C	-	Calm (0 kph at 301).
Renton 30 km WSW 160m alt. 2 hours ago	9° C	Dry	Calm (0 kph at 320).
Grotto wx 35 km NE 321m alt. 1 hour ago	8° C	Dry	Light winds from the ENE (6 kph at 71).
Renton Airport 36 km WSW 218m alt. 3 hours ago	12° C	Clear	Light winds from the NW (11 kph at 320).	16 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	4° C	Dry	Calm (2 kph at 44).
Auburn 39 km SW 119m alt. 2 hours ago	3° C	Dry	Calm (0 kph at 306).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	3° C	Clear	Calm (0 kph at 0).	16 km
Woodinville 43 km WNW 137.2m alt. 55 minutes ago	1° C	-	Calm (0 kph at 271).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	12° C	Clear	Calm (0 kph at 0).	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.