– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Sun 19 Jul Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Sun 19 Jul Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Warm (max 31°C on Wed afternoon, min 16°C on Sun night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 28°C on Thu afternoon, min 12°C on Fri night). Wind will be generally light.
		Monday 20			Tuesday 21			Wednesday 22			Thursday 23			Friday 24			Saturday 25
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	some clouds	some clouds	some clouds	some clouds	clear	clear	clear	clear	some clouds	clear	clear	clear	clear	rain shwrs	light rain	rain shwrs	some clouds
Cloud base (m)	9700		6900	6050	6950	6350	4550		4400	8900		4000		8300		600	450	850	2650
km/h	E	ESE	W	ESE	WNW	NW	E	WNW	WNW	SE	WSW	WSW	S	WSW	WSW	SSW	SW	WSW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.1	0.1	0.1	—
max °C	19	25	27	25	27	30	26	28	31	27	25	28	23	19	22	18	13	18	16
min °C	16	20	27	21	23	30	21	24	30	21	23	26	15	16	21	12	12	16	13
chill °C	16	20	27	21	23	30	21	24	30	21	23	26	15	16	21	11	11	16	13

Freezing level m	4450	4450	4500	4550	4550	4650	4600	4600	4600	4450	4150	4200	3950	3650	3850	3350	3250	3500	3450

	—	5:30	—	—	5:31	—	—	5:31	—	—	5:33	—	—	5:33	—	—	5:35	—	—
	—	—	—	8:54	—	—	8:53	—	—	8:52	—	—	8:52	—	—	8:51	—	—	8:50

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 31°C on Wed afternoon, min 16°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 28°C on Thu afternoon, min 12°C on Fri night). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 500 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. 54 minutes ago	18° C	Dry	Calm (2 kph at 357).
Black Diamond 32 km SSW 192m alt. 1 hour ago	27° C	Dry	Light winds from the ESE (6 kph at 105).
Renton Airport 36 km WSW 218m alt. 3 hours ago	21° C	Clear	Light winds from the NNW (15 kph at 340).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	24° C	Dry	Calm (0 kph at 227).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	13° C	Clear	Wind obs. (6 kph from 200 degs) was rejected.	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	21° C	Clear	Light winds from the WNW (7 kph at 300).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	20° C	Dry and partly cloudy.	Light winds from the N (13 kph at 0).	16 km Low: scattered
Snohomish 49 km NW 196m alt. 55 minutes ago	13° C	Dry	Calm (0 kph at 176).
Seattle 49 km WSW 100m alt. 2 hours ago	24° C	-
BUOY-WPOW1 55 km W 3m alt. 2 hours ago	15° C		Light winds from the NNE (15 kph at 30).

* 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.