– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Thu 16 Jul Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Thu 16 Jul Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 17°C on Sun afternoon, min 8°C on Thu night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 25°C on Wed afternoon, min 16°C on Sun night). Wind will be generally light.
		Friday 17			Saturday 18			Sunday 19			Monday 20			Tuesday 21			Wednesday 22
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	rain shwrs	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	some clouds	some clouds	clear	clear	clear	some clouds	some clouds	clear
Cloud base (m)	400	500								9700		6950		7250	6450	5550	7300	5950	5050
km/h	WSW	W	W	WNW	W	WNW	NNW	NNW	NNW	NE	SE	S	N	NE	NW	NW	WNW	NNW	NW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.6	0.2	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	10	10	15	13	11	15	14	14	17	17	20	22	21	22	23	23	24	25	25
min °C	8	8	13	10	10	13	11	12	15	16	18	21	20	21	22	22	23	25	23
chill °C	7	8	13	10	10	12	9	11	15	16	18	21	20	21	22	22	23	25	23

Freezing level m	4100	3950	3950	3950	3750	3850	4100	3950	4050	4400	4500	4400	4550	4750	5000	4950	4900	5000	4950

	—	5:26	—	—	5:26	—	—	5:28	—	—	5:30	—	—	5:31	—	—	5:31	—	—
	—	—	—	8:58	—	—	8:57	—	—	8:55	—	—	8:54	—	—	8:53	—	—	8:52

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 17°C on Sun afternoon, min 8°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 25°C on Wed afternoon, min 16°C on Sun 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. 2 hours ago	14° C	Dry	Calm (0 kph at 232).
Black Diamond 32 km SSW 192m alt. 39 minutes ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	16° C	Dry and cloudy.	Light winds from the S (6 kph at 190).	16 km Low: scattered Mid: overcast
Auburn 39 km SW 119m alt. 38 minutes ago	21° C	Dry	Calm (0 kph at 191).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	9° C	Fog -.	Calm (0 kph at 0).	0 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	15° C	Dry and partly cloudy.	Light winds from the S (9 kph at 190).	16 km Low: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	14° C	Dry and cloudy.	Light winds from the SSW (9 kph at 210).	16 km Low: broken Mid: overcast
Snohomish 49 km NW 196m alt. 2 hours ago	14° C	Dry	Calm (5 kph at 202).
Seattle 49 km WSW 100m alt. 47 minutes ago		-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	14° C		Moderate winds from the S (24 kph at 170).

* 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.