– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Tue 01 Sep Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Tue 01 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 17mm), heaviest on Wed night. Warm (max 20°C on Tue afternoon, min 9°C on Thu night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 22°C on Sun afternoon, min 10°C on Fri morning). Wind will be generally light.
	Tuesday 1			Wednesday 2			Thursday 3			Friday 4			Saturday 5			Sunday 6
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	rain shwrs	rain shwrs	rain shwrs	light rain	heavy rain	rain shwrs	rain shwrs	rain shwrs	some clouds	light rain	rain shwrs	clear	rain shwrs	rain shwrs	some clouds	some clouds	some clouds
Cloud base (m)	5200	1700	1900	850	600	400	750	2150	2300	650	1550	2450	2550	2250		6500	3000	8050
km/h	WSW	SW	SSW	SSE	NW	SW	WNW	NW	ENE	WNW	NNW	E	N	SSE	E	NW	WNW	NE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	0.1	0.7	0.9	1.7	12	0.9	0.3	0.1	—	0.5	0.2	—	0.1	0.2	—	—	—
max °C	17	20	15	13	14	12	13	16	13	13	16	13	17	21	16	20	22	17
min °C	15	19	13	13	13	10	10	16	9	10	15	11	13	20	15	16	22	14
chill °C	15	19	13	12	13	10	10	16	9	10	15	11	13	20	15	16	22	14

Freezing level m	3600	3350	3100	2500	2600	2200	2150	2400	2300	2400	2600	2800	2900	3000	3100	3150	3250	3350

	6:24	—	—	6:26	—	—	6:26	—	—	6:28	—	—	6:30	—	—	6:31	—	—
	—	7:46	—	—	7:45	—	—	7:44	—	—	7:42	—	—	7:39	—	—	7:37	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 17mm), heaviest on Wed night. Warm (max 20°C on Tue afternoon, min 9°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 22°C on Sun afternoon, min 10°C on Fri morning). 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. 1 hour ago	13°C	Dry	Calm (0 kph at 155).
Black Diamond 32 km SSW 192m alt. 3 hours ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	14°C	Clear	Light winds from the SSE (9 kph at 150).	16 km
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 227).
SHIP10850 43 km W 3m alt. 2 hours ago	13°C
SHIP10973 43 km W 15m alt. 2 hours ago				- km
SHIP2646 43 km W 15m alt. 2 hours ago				- km
SHIP4434 43 km W 15m alt. 2 hours ago				- km
SHIP4644 43 km W 3m alt. 2 hours ago	13°C
SHIP8169 43 km W 15m alt. 1 hour 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.