– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Sun 10 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Sun 10 May 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 26°C on Tue afternoon, min 9°C on Sun night). Wind will be generally light.									Days 4–6 Weather Summary Moderate rain (total 17mm), heaviest on Thu morning. Warm (max 22°C on Wed afternoon, min 5°C on Fri night). Wind will be generally light.
	Sunday 10			Monday 11			Tuesday 12			Wednesday 13			Thursday 14			Friday 15
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	cloudy	rain shwrs	some clouds	clear	clear	clear	rain shwrs	some clouds	some clouds	some clouds	light rain	mod. rain	light rain	mod. rain	rain shwrs	rain shwrs	clear
km/h	WSW	WSW	NNW	NNW	NW	ESE	ESE	WNW	SE	WNW	WNW	SSW	SW	WSW	WSW	WSW	NNW	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	0.1	—	—	—	—	0.1	—	—	—	0.2	7	0.7	8	0.9	0.2	—
max °C	13	17	11	14	18	15	22	26	20	20	22	18	9	11	8	6	12	10
min °C	12	15	9	11	17	13	18	25	17	18	22	10	8	11	6	6	10	5
chill °C	12	15	9	11	17	13	18	25	17	18	22	8	6	10	3	4	9	4

Freezing level m	3050	2400	2450	3250	3500	3750	3900	3850	3850	3800	3650	3250	1950	1950	1650	1350	1950	2300
Cloud base (m)	550	1950	900	6450	8900	9000	6750	8350	7200	4800	5300		700	700	450	450	900

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

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 26°C on Tue afternoon, min 9°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 17mm), heaviest on Thu morning. Warm (max 22°C on Wed afternoon, min 5°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. 27 minutes ago	16° C	Dry	Calm (0 kph at 248).
Renton 30 km WSW 160m alt. 56 minutes ago	13° C	Dry	Calm (0 kph at 186).
Black Diamond 32 km SSW 192m alt. 39 minutes ago		-	Calm (0 kph at 38).
Grotto wx 35 km NE 321m alt. 1 hour ago	13° C	Dry	Calm (5 kph at 263).
Renton Airport 36 km WSW 218m alt. 1 hour ago		Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken
Grotto wx 39 km NE 1101m alt. 18 minutes ago	11° C	Dry	Calm (2 kph at 155).
Auburn 39 km SW 119m alt. 59 minutes ago		-	Calm (0 kph at 311).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	8° C	Clear	Wind obs. (6 kph from 230 degs) was rejected.	16 km
SHIP3068 43 km W 15m alt. 2 hours ago				- km
SHIP5255 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.