– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Thu 07 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Thu 07 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 11°C on Sat afternoon, min 4°C on Fri morning). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Warm (max 20°C on Tue afternoon, min 5°C on Sun night). Wind will be generally light.
	Thu 7		Friday 8			Saturday 9			Sunday 10			Monday 11			Tuesday 12
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	cloudy	some clouds	clear	clear	cloudy	cloudy	cloudy	clear	rain shwrs	clear	clear	clear	some clouds	some clouds	some clouds
km/h	W	SW	SW	W	W	N	W	SW	SW	W	N	N	NNE	ESE	ESE	ESE	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	0.1	—	—	—	—	—	—
max °C	7	8	5	7	6	9	11	11	8	9	8	7	11	14	16	20	18
min °C	6	6	4	6	5	7	9	8	8	8	5	6	10	12	15	19	16
chill °C	6	3	0	3	3	6	9	8	7	6	1	3	10	12	14	19	15

Freezing level m	3450	3450	2150	2450	2900	3400	3400	3250	2800	2650	2350	3200	3450	3700	3900	3950	3900
Cloud base (m)		6150	900	2600	2200	8900	6900	6200	6000	2150	1600	6850	6500		6800	7850	7000

	—	—	5:39	—	—	5:37	—	—	5:35	—	—	5:35	—	—	5:33	—	—
	—	8:25	—	—	8:27	—	—	8:29	—	—	8:30	—	—	8:30	—	—	8:32

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 11°C on Sat afternoon, min 4°C on Fri morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 20°C on Tue afternoon, min 5°C on Sun night). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 1270 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. 46 minutes ago	16° C	Dry	Calm (0 kph at 334).
Renton 30 km WSW 160m alt. 46 minutes ago	17° C	Dry	Calm (0 kph at 0).
Black Diamond 32 km SSW 192m alt. 2 hours ago	26° C	Dry	Calm (5 kph at 211).
Grotto wx 35 km NE 321m alt. 2 hours ago	15° C	Dry	Light winds from the WSW (10 kph at 253).
Renton Airport 36 km WSW 218m alt. 2 hours ago	17° C	Clear	Light winds from the N (7 kph at 350).	16 km
Grotto wx 39 km NE 1101m alt. 2 hours ago	10° C	Dry	Calm (2 kph at 211).
Auburn 39 km SW 119m alt. 53 minutes ago	13° C	Dry	Calm (0 kph at 194).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	9° C	Clear	Wind obs. (7 kph from 1 degs) was rejected.	16 km
Woodinville 43 km WNW 137.2m alt. 1 hour ago	15° C	Dry	Wind obs. (13 kph from 304 degs) was rejected.
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	17° C	Dry and partly cloudy.	Light winds from the SW (6 kph at 220).	16 km Low: few Mid: 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.