– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Tue 29 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Tue 29 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 16mm), heaviest on Tue afternoon. Very mild (max 16°C on Thu afternoon, min 10°C on Tue night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 24°C on Sun afternoon, min 12°C on Fri night). Wind will be generally light.
	Tuesday 29			Wednesday 30			Thursday 1			Friday 2			Saturday 3			Sunday 4
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	mod. rain	rain shwrs	rain shwrs	rain shwrs	some clouds	some clouds	cloudy	some clouds	some clouds	clear	clear	clear	clear	clear	clear	some clouds	clear
Cloud base (m)	400	400	650	900		3250	2600	2050	950	900	9050				9400	8600	6600	9000
km/h	WSW	WSW	WSW	NW	NW	ESE	SW	WSW	SW	WSW	WNW	E	ESE	N	ESE	ESE	WNW	SE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	4	8	4	0.2	0.1	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	13	13	12	12	14	12	14	16	14	14	16	12	18	21	16	22	24	18
min °C	12	13	10	10	14	10	12	16	14	14	16	12	13	20	15	16	22	16
chill °C	10	11	10	10	14	10	12	16	14	14	16	12	13	20	15	16	22	16

Freezing level m	3350	3200	2750	2950	3200	3250	3250	3400	3400	3650	3700	4000	3950	4050	4250	4250	4200	4150

	7:01	—	—	7:03	—	—	7:05	—	—	7:05	—	—	7:07	—	—	7:09	—	—
	—	6:51	—	—	6:49	—	—	6:46	—	—	6:45	—	—	6:43	—	—	6:40	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 16mm), heaviest on Tue afternoon. Very mild (max 16°C on Thu afternoon, min 10°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 24°C on Sun 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. 3 hours ago	15°C	Dry	Wind obs. (8 kph from 165 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	16°C	Dry and cloudy.	Light winds from the S (15 kph at 170).	16 km Low: overcast
Auburn 39 km SW 119m alt. 1 hour ago	14°C	Dry	Calm (0 kph at 98).
Monroe 44 km NW 80m alt. 42 minutes ago	24°C	Dry	Calm (0 kph at 128).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	16°C	Dry and cloudy.	Moderate winds from the SSW (20 kph at 200).	16 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	16°C	Dry and cloudy.	Moderate winds from the SSW (26 kph at 210).	16 km Low: scattered Mid: broken High: overcast
BUOY-EBSW1 46 km W 3m alt. 2 hours ago
Snohomish 49 km NW 196m alt. 1 hour ago	14°C	Dry	Light winds from the SSW (13 kph at 197).
Seattle 49 km WSW 100m alt. 2 hours ago		-	Light winds from the SSE (14 kph at 156).
BUOY-WPOW1 55 km W 3m alt. 55 minutes ago	15°C		Fresh winds from the SSW (30 kph at 200).

* 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.