– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Tue 19 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Tue 19 Aug 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 19°C on Thu afternoon, min 9°C on Wed morning). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 26°C on Sat afternoon, min 19°C on Fri morning). Wind will be generally light.
	Tuesday 19			Wednesday 20			Thursday 21			Friday 22			Saturday 23			Sunday 24
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	some clouds	some clouds	rain shwrs	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	some clouds	clear	clear
km/h	WSW	WNW	WSW	WSW	NW	N	ESE	NE	ESE	ESE	E	ESE	ESE	NNE	SE	ESE	NW	N
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	0.1	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max°C	11	14	12	9	13	12	16	19	19	21	25	23	24	26	24	25	25	23
min°C	10	13	10	9	12	12	14	18	18	19	24	22	23	26	23	24	24	20
chill°C	10	13	9	8	12	11	14	18	18	19	24	22	23	26	23	24	24	20

Freezing level (m)	3600	3550	3450	3450	3600	4050	4100	4150	4350	4500	4600	4550	4550	4700	4600	4550	4600	4550
Cloud base (m)	4800		950	500				9200								5550

	6:07	—	—	6:09	—	—	6:09	—	—	6:11	—	—	6:13	—	—	6:13	—	—
	—	—	8:12	—	—	8:09	—	—	8:07	—	—	8:07	—	—	8:05	—	—	8:02

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 19°C on Thu afternoon, min 9°C on Wed morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 26°C on Sat afternoon, min 19°C on Fri morning). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 1270 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 51 minutes ago	19° C	Dry	Calm (0 kph at 238).
Renton Airport 36 km WSW 218m alt. 2 hours ago	20° C	Clear	Light winds from the S (11 kph at 190).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	31° C	Dry	Calm (0 kph at 186).
Stampede Pass Airport 40 km SE 628m alt. 59 minutes ago	14° C	-	Wind obs. (7 kph from 1 degs) was rejected.	16 km Low: few
SHIP5771 43 km W 3m alt. 2 hours ago	28° C
SHIP8626 43 km W 15m alt. 3 hours ago				- km
SHIP7682 43 km W 15m alt. 2 hours ago				- km
SHIP3562 43 km W 15m alt. 3 hours ago				- km
SHIP6136 43 km W 15m alt. 3 hours ago				- km
SHIP8435 43 km W 3m alt. 3 hours ago	23° 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.