– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Fri 14 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Fri 14 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 18°C on Fri afternoon, min 13°C on Sat night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 18°C on Mon afternoon, min 13°C on Mon night). Wind will be generally light.
	Friday 14			Saturday 15			Sunday 16			Monday 17			Tuesday 18			Wednesday 19
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	rain shwrs	rain shwrs	rain shwrs	some clouds	clear	clear	clear	clear	some clouds	clear	clear	clear	some clouds	clear	clear
Cloud base (m)		3500	9100	3550	2950		6650	5900	8800	8650	9200	2350	9200			7100
km/h	S	WNW	NE	ESE	W	NNW	NNW	NW	NNW	NNW	NW	NW	W	W	NNW	NW	WNW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	0.1	0.1	0.3	—	—	—	—	—	—	—	—	—	—	—	—
max °C	16	18	17	16	17	16	14	16	15	16	18	17	13	16	15	15	17	17
min °C	15	17	14	14	15	13	13	15	14	14	16	13	13	14	13	14	16	16
chill °C	15	17	14	14	15	13	13	15	14	13	16	13	13	14	13	14	16	16

Freezing level m	3400	3550	3600	3600	3750	3800	3850	4050	4100	4100	4200	4250	4400	4450	4700	4600	4550	4600

	6:01	—	—	6:01	—	—	6:03	—	—	6:05	—	—	6:05	—	—	6:07	—	—
	—	—	8:21	—	—	8:19	—	—	8:16	—	—	8:15	—	—	8:14	—	—	8:12

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 18°C on Fri afternoon, min 13°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 18°C on Mon afternoon, min 13°C on Mon 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
Renton 30 km WSW 160m alt. 50 minutes ago	21° C	Dry	Calm (3 kph at 321).
Renton Airport 36 km WSW 218m alt. 2 hours ago	18° C	Dry and partly cloudy.	Light winds from the N (11 kph at 1).	16 km Low: scattered
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (2 kph at 119).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	21° C	Haze -.	Calm (0 kph at 0).	8 km
SHIP3923 42 km WSW 15m alt. 2 hours ago			Calm (4 kph at 50).	- km
SHIP8570 42 km WSW 15m alt. 51 minutes ago			Light winds from the NNW (13 kph at 340).	- km
SHIP10259 42 km WSW 15m alt. 3 hours ago			Calm (6 kph at 190).	- km
SHIP9512 42 km WSW 15m alt. 2 hours ago			Calm (4 kph at 50).	- km
SHIP9315 42 km WSW 15m alt. 2 hours ago			Calm (4 kph at 50).	- km
SHIP5042 42 km WSW 15m alt. 3 hours ago			Calm (6 kph at 190).	- 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.