– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Sun 09 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Sun 09 Aug 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 16°C on Sun afternoon, min 11°C on Sun night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 20°C on Fri afternoon, min 11°C on Wed morning). Wind will be generally light.
	Sunday 9			Monday 10			Tuesday 11			Wednesday 12			Thursday 13			Friday 14
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	clear
Cloud base (m)	8950			8600													4350	9100
km/h	NNW	NW	NNW	NNW	NNW	N	NNW	NNW	N	NNW	NNW	NNW	NNE	NNW	ENE	SE	WNW	N
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	14	16	15	12	15	14	13	15	14	11	15	15	15	18	18	18	20	19
min °C	13	15	11	11	14	12	12	14	11	11	14	12	13	16	16	17	19	16
chill °C	12	15	9	10	13	11	11	13	9	9	13	11	13	16	16	17	19	16

Freezing level m	4100	4050	4050	4000	4000	4250	4000	3900	3950	3700	3800	3850	3750	3950	3950	3800	4000	4000

	5:54	—	—	5:54	—	—	5:56	—	—	5:58	—	—	5:58	—	—	6:01	—	—
	—	—	8:29	—	—	8:27	—	—	8:25	—	—	8:23	—	—	8:22	—	—	8:21

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 16°C on Sun afternoon, min 11°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 20°C on Fri afternoon, min 11°C on Wed 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
Renton 30 km WSW 160m alt. 40 minutes ago	15° C	Dry	Calm (0 kph at 144).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 57).
Renton Airport 36 km WSW 218m alt. 3 hours ago	14° C	-	Light winds from the ESE (6 kph at 110).	11 km
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (2 kph at 263).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	10° C	Clear	Wind obs. (7 kph from 210 degs) was rejected.	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	14° C	-	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13° C	Dry and partly cloudy.	Light winds from the W (7 kph at 270).	16 km Low: scattered Mid: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 56 minutes ago	17° C	Dry	Wind obs. (6 kph from 151 degs) was rejected.
Seattle 49 km WSW 100m alt. 1 hour ago		-	Wind obs. (8 kph from 149 degs) was rejected.

* 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.