– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Tue 18 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Tue 18 Aug 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 27°C on Thu afternoon, min 14°C on Tue night). Wind will be generally light.									Days 4–6 Weather Summary Some drizzle, heaviest during Fri afternoon. Warm (max 24°C on Fri afternoon, min 13°C on Sat night). Wind will be generally light.
	Tuesday 18			Wednesday 19			Thursday 20			Friday 21			Saturday 22			Sunday 23
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	some clouds	clear	clear	some clouds	some clouds	rain shwrs	rain shwrs	rain shwrs	rain shwrs	clear	clear	clear	clear
Cloud base (m)	6600	9700		9250	9050	9050					5300		450	750				9700
km/h	WNW	WNW	S	WNW	WNW	E	WNW	NW	ESE	W	WSW	SSW	SW	WSW	NE	NW	NW	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	0.4	0.4	0.4	0.2	—	—	—	—
max °C	20	25	21	20	24	21	23	27	23	22	24	20	14	18	16	21	24	19
min °C	17	23	14	16	23	17	19	26	20	22	23	14	14	16	13	16	23	16
chill °C	17	23	14	16	23	17	19	26	20	22	23	14	14	16	13	16	23	16

Freezing level m	4350	4300	4400	4350	4350	4400	4500	4650	4600	4400	4350	3850	3400	3650	4200	4250	4300	4300

	6:05	—	—	6:07	—	—	6:09	—	—	6:09	—	—	6:11	—	—	6:13	—	—
	—	—	8:14	—	—	8:12	—	—	8:09	—	—	8:07	—	—	8:07	—	—	8:05

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 27°C on Thu afternoon, min 14°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Fri afternoon. Warm (max 24°C on Fri afternoon, min 13°C on Sat 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
Renton 30 km WSW 160m alt. 32 minutes ago	18° C	Dry	Calm (3 kph at 280).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (6 kph from 126 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	16° C	Dry and cloudy.	Light winds from the S (7 kph at 180).	14 km Low: overcast
Auburn 39 km SW 119m alt. 2 hours ago	27° C	Dry	Calm (2 kph at 301).
SHIP8587 43 km W 15m alt. 43 minutes ago				- km
SHIP4321 43 km W 3m alt. 3 hours ago	14° C
SHIP11836 43 km W 3m alt. 3 hours ago	14° C
SHIP4989 43 km W 15m alt. 3 hours ago				- km
SHIP8854 43 km W 15m alt. 2 hours ago				- km
SHIP8416 43 km W 3m alt. 3 hours ago	14° 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.