– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Mon 11 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Mon 11 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 15mm), heaviest on Wed afternoon. Warm (max 25°C on Tue afternoon, min 7°C on Wed morning). Wind will be generally light.									Days 4–6 Weather Summary Heavy rain (total 29mm), heaviest during Fri afternoon. Very mild (max 11°C on Thu afternoon, min 4°C on Fri night). Wind will be generally light.
	Monday 11			Tuesday 12			Wednesday 13			Thursday 14			Friday 15			Saturday 16
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	some clouds	some clouds	some clouds	rain shwrs	light rain	mod. rain	light rain	rain shwrs	light rain	rain shwrs	light rain	mod. rain	mod. rain	light rain	mod. rain	rain shwrs
km/h	NW	NW	ESE	SE	W	WSW	SW	SW	WSW	SW	W	SSW	SSW	SW	WSW	SW	NW	N
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	0.1	1.5	9	5	1.9	0.4	0.2	1	8	7	1	6	4
max °C	14	18	15	23	25	19	10	7	8	8	11	9	8	7	5	5	8	6
min °C	11	17	13	17	23	10	7	7	7	7	10	5	8	7	4	4	6	4
chill °C	11	17	13	17	23	10	6	6	4	4	8	4	7	4	0	2	5	2

Freezing level m	3200	3400	3750	3850	3700	3450	1950	1700	1700	1500	1950	1800	1600	1450	1100	1150	1350	1150
Cloud base (m)			9050	6150	8250	700	800	400	400	500	950	2700	700	550	450	450	700	450

	5:35	—	—	5:33	—	—	5:31	—	—	5:31	—	—	5:30	—	—	5:28	—	—
	—	—	8:30	—	—	8:32	—	—	8:34	—	—	8:35	—	—	8:37	—	—	8:37

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 15mm), heaviest on Wed afternoon. Warm (max 25°C on Tue afternoon, min 7°C on Wed morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 29mm), heaviest during Fri afternoon. Very mild (max 11°C on Thu afternoon, min 4°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
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	21° C	Dry	Calm (0 kph at 180).
Renton 30 km WSW 160m alt. 1 hour ago	19° C	Dry	Light winds from the N (6 kph at 349).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (10 kph from 44 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	19° C	Dry	Light winds from the W (13 kph at 270).
Renton Airport 36 km WSW 218m alt. 3 hours ago	17° C	-	Light winds from the NNW (17 kph at 330).	16 km
Grotto wx 39 km NE 1101m alt. 55 minutes ago	18° C	Dry	Calm (2 kph at 110).
Auburn 39 km SW 119m alt. 1 hour ago	27° C	Dry	Calm (0 kph at 263).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	13° C	Clear	Light winds from the N (6 kph at 1).	16 km
Woodinville 43 km WNW 137.2m alt. 2 hours ago	18° C	Dry	Wind obs. (8 kph from 156 degs) was rejected.
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	17° C	-	Light winds from the N (6 kph at 1).	16 km Low: few

* 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.