– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Wed 14 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Wed 14 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 6mm), mostly falling on Sat morning. Warm (max 23°C on Fri afternoon, min 10°C on Sat afternoon). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Very mild (max 12°C on Sun afternoon, min 6°C on Sat night). Wind will be generally light.
		Thursday 15			Friday 16			Saturday 17			Sunday 18			Monday 19
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	rain shwrs	rain shwrs	rain shwrs	some clouds	some clouds	cloudy	some clouds	cloudy	some clouds	some clouds
Cloud base (m)				9650	9150	8600	9300	550		6300	7050	6150		2800	2600	6800
km/h	ESE	ESE	ESE	SE	SE	SW	SSW	WSW	NNW	NE	NW	E	SE	W	NNW	NNE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	1.2	4	0.7	—	—	—	—	—	—	—
max °C	12	20	22	15	20	23	16	11	10	8	10	12	9	10	10	8
min °C	12	12	21	14	14	21	12	11	10	6	6	11	8	6	10	6
chill °C	12	11	21	14	14	21	11	9	9	5	5	11	7	6	10	6

Freezing level m	4000	4050	4050	4000	4000	3800	3250	2000	2100	2250	2900	2900	2500	1850	1950	2100

	—	7:24	—	—	7:26	—	—	7:28	—	—	7:28	—	—	7:30	—	—
	—	—	6:19	—	—	6:16	—	—	6:15	—	—	6:14	—	—	6:12	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 6mm), mostly falling on Sat morning. Warm (max 23°C on Fri afternoon, min 10°C on Sat afternoon). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 12°C on Sun afternoon, min 6°C on Sat 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. 2 hours ago	13°C	Dry	Calm (0 kph at 314).
Renton Airport 36 km WSW 21m alt. 47 minutes ago	13°C	Clear	Light winds from the NW (9 kph at 310).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	12°C	Dry	Calm (0 kph at 90).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	9°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: scattered
SHIP4689 42 km WSW 15m alt. 3 hours ago				- km
SHIP4352 42 km WSW 3m alt. 3 hours ago
SHIP6638 42 km WSW 15m alt. 3 hours ago				- km
SHIP10928 42 km WSW 15m alt. 2 hours ago				- km
SHIP11496 42 km WSW 15m alt. 3 hours ago				- km
SHIP5405 42 km WSW 3m alt. 2 hours ago

* 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.