– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Fri 21 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Fri 21 Aug Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 5mm), mostly falling on Sat morning. Warm (max 24°C on Fri afternoon, min 8°C on Sat night). Wind will be generally light.											Days 5–7 Weather Summary Some drizzle, heaviest during Thu morning. Warm (max 21°C on Tue afternoon, min 8°C on Wed night). Wind will be generally light.
	Fri 21		Saturday 22			Sunday 23			Monday 24			Tuesday 25			Wednesday 26
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	rain shwrs	rain shwrs	rain shwrs	rain shwrs	light rain	rain shwrs	clear	clear	clear	clear	clear	clear	clear	clear	clear	rain shwrs
Cloud base (m)	5700	4700	400	500	800	550	900			9200						9550
km/h	SW	NNW	SW	W	WSW	SW	NW	N	ESE	NNE	SE	SE	WNW	W	W	WSW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	0.3	2	0.9	0.5	0.6	0.2	—	—	—	—	—	—	—	—	—	0.2
max °C	24	20	13	13	12	8	11	12	16	18	18	20	21	20	16	16	13
min °C	20	16	12	12	8	8	10	11	13	17	18	19	21	16	16	16	8
chill °C	20	16	11	11	5	5	9	10	13	17	18	19	21	16	16	16	5

Freezing level m	4650	4500	4100	3650	3150	3000	3650	4050	4050	4150	4150	4200	4300	4200	4100	3950	3100

	—	—	6:11	—	—	6:13	—	—	6:13	—	—	6:15	—	—	6:16	—	—
	—	8:07	—	—	8:07	—	—	8:05	—	—	8:02	—	—	8:00	—	7:59	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 5mm), mostly falling on Sat morning. Warm (max 24°C on Fri afternoon, min 8°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Thu morning. Warm (max 21°C on Tue afternoon, min 8°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
Renton 30 km WSW 160m alt. 1 hour ago	21° C	Dry	Calm (2 kph at 204).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 128).
Renton Airport 36 km WSW 218m alt. 2 hours ago	23° C	Clear	Light winds from the S (13 kph at 180).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	23° C	Dry	Calm (0 kph at 232).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	22° C	Clear	Wind obs. (7 kph from 1 degs) was rejected.	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	21° C	Dry and partly cloudy.	Light winds from the SW (13 kph at 220).	16 km Low: few Mid: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 1 hour ago	21° C	Dry	Calm (5 kph at 187).
Seattle 49 km WSW 100m alt. 1 hour ago	24° C	-
BUOY-WPOW1 55 km W 3m alt. 51 minutes ago	17° C		Moderate winds from the SSE (28 kph at 160).

* 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.