– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Sat 09 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Sat 09 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 18°C on Sat afternoon, min 9°C on Sun night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 26°C on Tue afternoon, min 5°C on Thu night). Wind will be generally light.
	Saturday 9			Sunday 10			Monday 11			Tuesday 12			Wednesday 13			Thursday 14
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	cloudy	some clouds	cloudy	some clouds	rain shwrs	clear	clear	clear	some clouds	clear	some clouds	some clouds	cloudy	some clouds	clear	some clouds	rain shwrs
km/h	NW	NW	SE	WSW	W	NNW	NW	NW	ESE	ESE	WNW	ESE	WNW	WSW	SSW	SW	WSW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	0.1	—	—	—	—	—	—	—	—	—	—	—	0.9
max °C	14	18	15	14	17	12	14	18	15	23	26	21	21	23	19	14	16	12
min °C	11	17	11	13	16	9	11	17	13	18	26	18	19	23	11	12	16	5
chill °C	11	17	11	13	16	9	11	17	13	18	26	18	19	23	10	11	15	2

Freezing level m	3450	3450	3300	2900	2450	2700	3250	3500	3750	3900	3900	3950	3900	3650	3400	2800	2450	1550
Cloud base (m)	9000	6400	6500		2150	850	6200	6850	9100	6450	8350		4850		8800	5050	2650	700

	5:37	—	—	5:35	—	—	5:35	—	—	5:33	—	—	5:31	—	—	5:31	—	—
	—	—	8:29	—	—	8:30	—	—	8:30	—	—	8:32	—	—	8:34	—	—	8:35

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 18°C on Sat afternoon, min 9°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 26°C on Tue afternoon, min 5°C on Thu 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	12° C	Dry	Calm (0 kph at 320).
Renton 30 km WSW 160m alt. 1 hour ago	9° C	Dry	Calm (0 kph at 144).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (5 kph at 0).
Grotto wx 35 km NE 321m alt. 40 minutes ago	7° C	Dry	Calm (3 kph at 78).
Renton Airport 36 km WSW 218m alt. 3 hours ago	10° C	Clear	Calm (0 kph at 0).	16 km
Grotto wx 39 km NE 1101m alt. 44 minutes ago	2° C	-	Calm (0 kph at 69).
Auburn 39 km SW 119m alt. 41 minutes ago	14° C	Dry	Calm (0 kph at 36).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	4° C	Fog -.	Wind obs. (7 kph from 1 degs) was rejected.	0 km
SHIP10341 43 km W 15m alt. 3 hours ago				- km
SHIP6771 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.