– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Tue 13 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Tue 13 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Warm (max 21°C on Thu afternoon, min 8°C on Tue morning). Wind will be generally light.									Days 4–6 Weather Summary Moderate rain (total 11mm), heaviest on Sat morning. Warm (max 22°C on Fri afternoon, min 5°C on Sat night). Wind will be generally light.
	Tuesday 13			Wednesday 14			Thursday 15			Friday 16			Saturday 17			Sunday 18
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	light rain	some clouds	some clouds	clear	clear	clear	clear	clear	clear	rain shwrs	mod. rain	mod. rain	rain shwrs	some clouds	cloudy	some clouds
Cloud base (m)	2200	2050	850	700	1650		8900				8450		450	800	8950	6200	5350	3200
km/h	W	W	SSW	W	NNW	ESE	ESE	ESE	ESE	SSE	SW	SSW	WSW	NW	E	ESE	SE	SE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	0.2	—	—	—	—	—	—	—	—	0.3	5	5	0.2	—	—	—
max °C	11	13	11	13	15	12	18	21	15	20	22	15	11	10	8	11	14	9
min °C	8	13	11	11	14	11	12	20	13	14	21	11	10	9	5	6	12	8
chill °C	8	13	11	11	14	11	11	20	12	14	21	9	7	8	4	4	12	7

Freezing level m	3200	3050	3050	3450	3750	3950	3900	3950	4000	3950	3800	3350	2150	1800	2050	2750	2650	2300

	7:22	—	—	7:22	—	—	7:24	—	—	7:26	—	—	7:28	—	—	7:28	—	—
	—	6:22	—	—	6:21	—	—	6:19	—	—	6:16	—	—	6:15	—	—	6:14	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 21°C on Thu afternoon, min 8°C on Tue morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 11mm), heaviest on Sat morning. Warm (max 22°C on Fri afternoon, min 5°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 Airport 36 km WSW 218m alt. 2 hours ago		Dry and partly cloudy.	Light winds from the SSE (11 kph at 160).	0.1 km Low: scattered
Auburn 39 km SW 119m alt. 1 hour ago		-	Wind obs. (6 kph from 218 degs) was rejected.
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	8°C	Dry and cloudy.	Light winds from the N (7 kph at 1).	16 km Low: few Mid: overcast
SHIP9066 43 km W 15m alt. 3 hours ago				- km
Monroe 44 km NW 80m alt. 2 hours ago	17°C	Dry	Calm (0 kph at 221).
SHIP12122 43 km W 15m alt. 3 hours ago				- km
SHIP5193 43 km W 3m alt. 3 hours ago
SHIP4625 43 km W 15m alt. 3 hours ago				- km
SHIP9260 43 km W 3m alt. 3 hours ago
SHIP7734 43 km W 15m alt. 3 hours ago				- 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.