– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Thu 23 Jul Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Thu 23 Jul 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 Fri afternoon, min 10°C on Sat night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 15°C on Sun afternoon, min 9°C on Mon morning). Wind will be generally light.
	Thursday 23			Friday 24			Saturday 25			Sunday 26			Monday 27			Tuesday 28
	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	rain shwrs	some clouds	some clouds	rain shwrs	rain shwrs	clear	clear	cloudy	rain shwrs
Cloud base (m)	450	800						1750	1850	1700	1700	1950	800	1900			1950
km/h	W	WSW	W	SW	W	SW	SW	WSW	WSW	SW	W	SW	WSW	W	NNW	W	W	W
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	0.1	—	—	0.2	0.1	—	—	—	0.1
max °C	15	17	16	16	19	17	12	12	11	11	15	13	11	15	14	12	14	12
min °C	14	15	14	15	18	12	11	12	10	10	13	10	9	13	11	11	14	9
chill °C	14	15	14	15	18	11	10	11	8	9	12	8	7	12	11	11	14	9

Freezing level m	4450	4450	4450	4350	4200	3800	3450	3300	3750	3600	3700	3100	3400	3700	3950	3700	3500	3750

	5:33	—	—	5:33	—	—	5:35	—	—	5:35	—	—	5:37	—	—	5:39	—	—
	—	—	8:52	—	—	8:51	—	—	8:50	—	—	8:49	—	—	8:47	—	—	8:45

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 19°C on Fri afternoon, min 10°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 15°C on Sun afternoon, min 9°C on Mon 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Renton 30 km WSW 160m alt. 1 hour ago	22° C	Dry	Calm (3 kph at 149).
Renton Airport 36 km WSW 218m alt. 2 hours ago	21° C	Dry and partly cloudy.	Light winds from the S (13 kph at 180).	16 km Low: broken
Auburn 39 km SW 119m alt. 36 minutes ago	36° C	Dry	Calm (0 kph at 270).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	14° C	Fog -.	Wind obs. (6 kph from 240 degs) was rejected.	0 km
SHIP7620 43 km W 3m alt. 3 hours ago	19° C
SHIP7047 43 km W 15m alt. 3 hours ago				- km
SHIP1538 43 km W 15m alt. 1 hour ago				- km
SHIP2483 43 km W 15m alt. 3 hours ago				- km
SHIP4989 43 km W 15m alt. 3 hours ago				- km
SHIP7703 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.