– Lat/Long: 47.51° N 121.74° W

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

Issued: 10 am Sun 10 May 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 26°C on Tue afternoon, min 9°C on Sun night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 8mm), mostly falling on Fri night. Warm (max 21°C on Wed afternoon, min 4°C on Fri night). Wind will be generally light.
	Sunday 10			Monday 11			Tuesday 12			Wednesday 13			Thursday 14			Friday 15
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	cloudy	rain shwrs	clear	clear	clear	some clouds	rain shwrs	clear	some clouds	some clouds	some clouds	some clouds	light rain	rain shwrs	light rain	rain shwrs	rain shwrs
km/h	WSW	WSW	NW	NNW	NW	ESE	ESE	WSW	SE	WNW	W	SSW	SW	SW	SW	SSW	WSW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.1	—	0.5	—	—	—	—	0.2	—	—	—	—	—	0.1	1.6	1	0.9	4
max °C	13	15	10	14	18	15	22	26	20	19	21	18	11	15	10	7	10	7
min °C	12	15	9	11	17	13	18	25	15	17	21	8	9	13	6	7	9	4
chill °C	12	15	8	11	17	13	18	25	15	17	21	6	7	11	4	5	8	1

Freezing level m	2950	2350	2350	3250	3500	3750	3900	3850	3850	3700	3500	3250	2700	2250	1500	1400	1750	1150
Cloud base (m)	500	1900	850	6650	9100	9000	6200	8650	6550	5250	6650	2550	2200	1600	850	700	850	900

	5:35	—	—	5:35	—	—	5:33	—	—	5:31	—	—	5:31	—	—	5:30	—	—
	—	—	8:30	—	—	8:30	—	—	8:32	—	—	8:34	—	—	8:35	—	—	8:37

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 26°C on Tue afternoon, min 9°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 8mm), mostly falling on Fri night. Warm (max 21°C on Wed afternoon, min 4°C on Fri 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. 33 minutes ago	18° C	Dry	Calm (2 kph at 17).
Renton 30 km WSW 160m alt. 1 hour ago	17° C	Dry	Calm (3 kph at 223).
Black Diamond 32 km SSW 192m alt. 45 minutes ago		-	Light winds from the W (8 kph at 271).
Grotto wx 35 km NE 321m alt. 21 minutes ago	15° C	Dry	Light winds from the W (18 kph at 267).
Renton Airport 36 km WSW 218m alt. 2 hours ago		Dry and partly cloudy.	Light winds from the N (6 kph at 1).	16 km Low: broken
Grotto wx 39 km NE 1101m alt. 33 minutes ago	9° C	Dry	Calm (2 kph at 51).
Auburn 39 km SW 119m alt. 20 minutes ago	30° C	Dry	Calm (2 kph at 173).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	10° C	Dry and partly cloudy.	Light winds from the W (11 kph at 260).	16 km Low: few Mid: broken High: broken
SHIP3800 43 km W 3m alt. 3 hours ago	18° C
SHIP4063 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.