– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Fri 28 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Fri 28 Aug Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Moderate rain (total 17mm), heaviest on Sat morning. Very mild (max 18°C on Fri afternoon, min 10°C on Fri night). Wind will be generally light.											Days 5–7 Weather Summary Moderate rain (total 17mm), heaviest on Wed morning. Warm (max 21°C on Mon afternoon, min 10°C on Wed night). Wind will be generally light.
	Fri 28		Saturday 29			Sunday 30			Monday 31			Tuesday 1			Wednesday 2
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	light rain	heavy rain	rain shwrs	rain shwrs	some clouds	cloudy	clear	clear	clear	some clouds	some clouds	some clouds	light rain	mod. rain	mod. rain	rain shwrs
Cloud base (m)	850	1850	400	450	650	800	1900	8300	9200	8600	6400	5250	2100	600	450	450	1500
km/h	W	SSW	W	WSW	WSW	WSW	N	NE	NW	NW	SSE	WSW	WSW	SW	S	S	SE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.1	2	12	2	0.8	—	—	—	—	—	—	—	—	0.7	8	6	2
max °C	18	15	10	14	13	13	14	14	18	21	17	19	21	16	13	13	13
min °C	17	10	10	12	10	10	14	11	14	21	14	15	20	13	13	13	10
chill °C	17	9	8	12	10	10	14	11	14	21	14	15	20	12	12	12	10

Freezing level m	3250	2500	2150	2400	2950	3150	3400	3650	3750	3850	3850	3700	3500	2750	2650	2500	2300

	—	—	6:20	—	—	6:22	—	—	6:22	—	—	6:24	—	—	6:26	—	—
	7:54	—	—	7:52	—	—	7:51	—	—	7:49	—	—	7:46	—	—	7:45	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 17mm), heaviest on Sat morning. Very mild (max 18°C on Fri afternoon, min 10°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 17mm), heaviest on Wed morning. Warm (max 21°C on Mon afternoon, min 10°C on Wed 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. 42 minutes ago	21°C	Dry	Calm (2 kph at 231).
Black Diamond 32 km SSW 192m alt. 53 minutes ago		-	Calm (2 kph at 283).
Renton Airport 36 km WSW 218m alt. 2 hours ago	22°C	Dry and partly cloudy.	Light winds from the SW (9 kph at 230).	16 km Low: broken
Auburn 39 km SW 119m alt. 43 minutes ago	29°C	Dry	Calm (0 kph at 307).
SHIP7314 43 km W 15m alt. 3 hours ago				- km
SHIP7877 43 km W 15m alt. 3 hours ago				- km
SHIP7042 43 km W 3m alt. 3 hours ago	21°C
SHIP743 43 km W 15m alt. 3 hours ago				- km
SHIP3156 43 km W 15m alt. 3 hours ago				- km
SHIP5834 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.