– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Mon 04 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Mon 04 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 22°C on Mon afternoon, min 6°C on Wed night). Wind will be generally light.									Days 4–6 Weather Summary Some drizzle, heaviest during Sat afternoon. Very mild (max 15°C on Thu afternoon, min 7°C on Fri night). Wind will be generally light.
	Monday 4			Tuesday 5			Wednesday 6			Thursday 7			Friday 8			Saturday 9
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	clear	some clouds	some clouds	clear	some clouds	some clouds	cloudy	cloudy	light rain	light rain	rain shwrs	clear
km/h	WNW	WNW	E	WNW	WNW	S	WSW	WSW	SW	W	W	SSW	SW	W	WSW	W	NW	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.3	0.2	0.5	—
max °C	20	22	18	17	21	18	16	17	13	11	15	12	10	11	9	9	13	11
min °C	18	22	13	14	20	12	14	17	6	8	14	9	10	10	7	8	12	8
chill °C	18	22	13	14	20	12	14	17	6	8	14	8	9	8	6	8	12	8

Freezing level m	3400	3400	3500	3500	3500	3600	3450	3200	2900	3250	3350	3250	1950	1900	1800	2300	3250	3500
Cloud base (m)	9200	8700					9350	2000	2200			5850	5600	2000	500	450	950	6900

	5:45	—	—	5:43	—	—	5:41	—	—	5:41	—	—	5:39	—	—	5:37	—	—
	—	—	8:22	—	—	8:22	—	—	8:24	—	—	8:25	—	—	8:27	—	—	8:29

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 22°C on Mon afternoon, min 6°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Sat afternoon. Very mild (max 15°C on Thu afternoon, min 7°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. 51 minutes ago	27° C	Dry	Calm (0 kph at 347).
Renton 30 km WSW 160m alt. 1 hour ago	24° C	Dry	Calm (3 kph at 316).
Black Diamond 32 km SSW 192m alt. 1 hour ago	27° C	Dry	Calm (2 kph at 0).
Grotto wx 35 km NE 321m alt. 50 minutes ago	25° C	Dry	Light winds from the W (19 kph at 271).
Renton Airport 36 km WSW 218m alt. 2 hours ago	24° C	Clear	Light winds from the SSW (15 kph at 200).	16 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	22° C	Dry	Calm (5 kph at 31).
Auburn 39 km SW 119m alt. 1 hour ago	27° C	Dry	Calm (3 kph at 185).
SHIP10809 42 km WSW 3m alt. 54 minutes ago
SHIP7844 42 km WSW 15m alt. 2 hours ago				- km
SHIP4274 42 km WSW 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.