– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Thu 07 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Thu 07 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 11°C on Sat afternoon, min 3°C on Thu morning). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 19°C on Tue afternoon, min 5°C on Sun night). Wind will be generally light.
	Thursday 7			Friday 8			Saturday 9			Sunday 10			Monday 11			Tuesday 12
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	some clouds	some clouds	cloudy	clear	clear	clear	cloudy	some clouds	cloudy	some clouds	rain shwrs	clear	clear	clear	some clouds	some clouds	clear
km/h	NW	WNW	WSW	SW	W	WNW	N	WNW	SW	SW	W	N	N	N	ESE	SE	SE	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.1	—	—	—	—	—	—	—	—	—	—	0.1	—	—	—	—	—	—
max °C	4	8	8	5	8	7	8	11	11	8	9	8	7	11	13	16	19	17
min °C	3	6	6	4	6	5	7	10	8	7	8	5	6	10	12	15	18	15
chill °C	1	6	3	0	3	3	5	10	8	5	6	1	3	9	12	14	18	15

Freezing level m	3300	3350	3400	2050	2500	2950	3400	3400	3250	2800	2500	2600	3150	3400	3700	3850	4000	3900
Cloud base (m)	450	9400	6250	5750	2600	2200	9000	6750	6350		2100	1950				6850	6300

	5:41	—	—	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 3°C on Thu morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 19°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. 1 hour ago	16° C	Dry	Calm (0 kph at 312).
Renton 30 km WSW 160m alt. 2 hours ago	14° C	Dry	Calm (0 kph at 196).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (8 kph from 84 degs) was rejected.
Grotto wx 35 km NE 321m alt. 48 minutes ago	13° C	Dry	Light winds from the WSW (11 kph at 254).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 54 minutes ago	11° C	Dry	Calm (2 kph at 160).
Auburn 39 km SW 119m alt. 27 minutes ago	23° C	Dry	Calm (2 kph at 184).
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
SHIP3694 43 km W 15m alt. 3 hours ago				- km
SHIP8168 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.