– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Thu 27 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Thu 27 Aug Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 14mm), heaviest on Sat morning. Very mild (max 18°C on Fri afternoon, min 10°C on Fri night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 8mm), mostly falling on Tue afternoon. Warm (max 20°C on Mon afternoon, min 10°C on Sun morning). Wind will be generally light.
	Thursday 27			Friday 28			Saturday 29			Sunday 30			Monday 31			Tuesday 1
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	light rain	rain shwrs	rain shwrs	rain shwrs	rain shwrs	mod. rain	rain shwrs	rain shwrs	light rain	light rain	some clouds	clear	rain shwrs	rain shwrs	light rain	rain shwrs	light rain
Cloud base (m)	6100	950	750	600		650	400	750	800	600	1850			3000	3050	500	550	1550
km/h	SW	WSW	W	WSW	W	SW	WSW	WSW	SW	SSW	WSW	ENE	WSW	W	SSE	SW	SW	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.1	0.5	1.2	0.3	0.1	0.3	6	4	1.7	0.2	0.1	—	—	0.1	0.3	2	4	1.4
max °C	17	17	14	13	18	15	10	13	12	11	14	13	17	20	16	12	13	11
min °C	14	17	12	12	16	10	10	11	10	10	14	10	13	19	12	12	12	10
chill °C	14	17	12	12	16	9	9	10	9	9	14	10	13	19	12	12	10	9

Freezing level m	3100	3150	3250	3200	3150	2650	2150	2400	2450	2950	3000	3350	3300	3300	3100	2550	2500	2200

	6:18	—	—	6:18	—	—	6:20	—	—	6:22	—	—	6:22	—	—	6:24	—	—
	—	7:57	—	—	7:54	—	—	7:52	—	—	7:51	—	—	7:49	—	—	7:46	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 14mm), heaviest on Sat morning. Very mild (max 18°C on Fri afternoon, min 10°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 8mm), mostly falling on Tue afternoon. Warm (max 20°C on Mon afternoon, min 10°C on Sun morning). 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	16°C	Dry	Calm (0 kph at 142).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	18°C	Dry and cloudy.	Light winds from the S (11 kph at 190).	16 km Low: broken Mid: overcast
Auburn 39 km SW 119m alt. 1 hour ago	15°C	Dry	Calm (0 kph at 74).
Monroe 44 km NW 80m alt. 2 hours ago		-	Calm (0 kph at 108).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	17°C	Dry and cloudy.	Light winds from the S (13 kph at 170).	16 km Low: scattered Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	17°C	Dry and partly cloudy.	Light winds from the S.(Wind varies from 024 to 030 degs) (11 kph at 190).	16 km Low: scattered Mid: broken High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 1 hour ago	13°C	Dry	Calm (0 kph at 9).
Seattle 49 km WSW 100m alt. 3 hours ago	24°C	-

* 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.