– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Tue 12 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Tue 12 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 53mm), heaviest during Wed afternoon. Very mild (max 18°C on Tue night, min 5°C on Thu night). Wind will be generally light.										Days 5–7 Weather Summary Heavy rain (total 31mm), heaviest during Sat night. Very mild (max 13°C on Mon afternoon, min 3°C on Sat night). Wind will be generally light.
		Wednesday 13			Thursday 14			Friday 15			Saturday 16			Sunday 17			Monday 18
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	heavy rain	heavy rain	light rain	light rain	light rain	rain shwrs	rain shwrs	light rain	rain shwrs	rain shwrs	mod. rain	rain shwrs	rain shwrs	rain shwrs	some clouds	some clouds	some clouds	rain shwrs
km/h	WSW	SW	WSW	WSW	SW	SW	WSW	SW	SW	SW	SW	W	W	NW	NNW	WSW	W	WNW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	13	15	13	1.7	1.1	1.2	3	1.2	3	11	4	8	7	0.3	0.3	—	—	—	0.3
max °C	18	7	9	9	8	10	8	6	8	6	5	6	4	5	9	8	10	13	11
min °C	8	7	8	6	7	9	5	5	6	4	5	5	3	4	8	6	7	13	8
chill °C	7	5	5	3	5	7	2	2	4	0	2	3	3	3	8	6	7	13	6

Freezing level m	2950	1650	1900	1500	1500	1650	1500	1250	1350	1250	1150	1200	1050	1200	1600	1700	1750	2200	1900
Cloud base (m)	400	400	400	550	600	800	400	600	750	400	500	450	450	450	700	1600	850	1950	550

	—	5:31	—	—	5:31	—	—	5:30	—	—	5:28	—	—	5:26	—	—	5:26	—	—
	—	—	—	8:34	—	—	8:35	—	—	8:37	—	—	8:37	—	—	8:38	—	—	8:39

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 53mm), heaviest during Wed afternoon. Very mild (max 18°C on Tue night, min 5°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 31mm), heaviest during Sat night. Very mild (max 13°C on Mon afternoon, min 3°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
Harman Heights wx 6 km SSW 251m alt. 2 hours ago	17° C	Dry	Wind obs. (6 kph from 153 degs) was rejected.
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	13° C	Dry	Calm (5 kph at 156).
Renton Airport 36 km WSW 218m alt. 2 hours ago	15° C	Dry and partly cloudy.	Light winds from the SW (9 kph at 230).	16 km Low: broken Mid: broken
Grotto wx 39 km NE 1101m alt. 2 hours ago	11° C	Dry	Calm (0 kph at 292).
Auburn 39 km SW 119m alt. 54 minutes ago	10° C	Dry	Calm (0 kph at 204).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	8° C	Fog -.	Calm (0 kph at 0).	0 km Low: broken Mid: overcast
Woodinville 43 km WNW 137.2m alt. 1 hour ago	15° C	Dry	Wind obs. (19 kph from 277 degs) was rejected.
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	14° C	Dry and partly cloudy.	Light winds from the SSW (11 kph at 210).	16 km Low: few Mid: broken High: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13° C	Light rain .	Light winds from the SSW (13 kph at 200).	16 km Low: scattered Mid: broken High: broken

* 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.