– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Sat 16 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Sat 16 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Light rain (total 9mm), mostly falling on Sat afternoon. Very mild (max 14°C on Mon afternoon, min 4°C on Sat morning). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 2mm), mostly falling on Tue afternoon. Warm (max 20°C on Thu afternoon, min 6°C on Tue night). Wind will be generally light.
	Saturday 16			Sunday 17			Monday 18			Tuesday 19			Wednesday 20			Thursday 21
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	risk tstorm	light rain	rain shwrs	rain shwrs	some clouds	cloudy	rain shwrs	some clouds	light rain	rain shwrs	rain shwrs	some clouds	clear	clear	clear	clear	some clouds
km/h	W	NNW	NNW	NW	NW	ESE	WNW	WNW	W	W	WNW	N	NW	NW	E	WNW	NW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	3	4	1.5	0.3	0.2	—	—	0.1	—	0.1	1.2	1.1	—	—	—	—	—	—
max °C	6	7	5	7	12	10	11	14	11	9	12	10	12	16	13	17	20	17
min °C	4	7	4	5	9	7	8	13	8	8	10	6	8	15	10	14	19	10
chill °C	2	6	2	4	9	7	8	13	8	8	10	6	8	15	10	14	19	10

Freezing level m	1250	1400	1150	1350	2000	2050	1900	2200	2050	2000	2200	2700	2700	3050	3350	3400	3350	3300
Cloud base (m)	450	850	650	600	750		900	950	1600	450	600	1900	650	9200		8050	8200

	5:28	—	—	5:26	—	—	5:26	—	—	5:24	—	—	5:24	—	—	5:22	—	—
	—	—	8:37	—	—	8:38	—	—	8:39	—	—	8:42	—	—	8:43	—	—	8:44

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 9mm), mostly falling on Sat afternoon. Very mild (max 14°C on Mon afternoon, min 4°C on Sat morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 2mm), mostly falling on Tue afternoon. Warm (max 20°C on Thu afternoon, min 6°C on Tue 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. 38 minutes ago	13° C	Dry	Calm (0 kph at 266).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	8° C	-	Calm (0 kph at 222).
Renton 30 km WSW 160m alt. 51 minutes ago	13° C	Dry	Calm (0 kph at 316).
Black Diamond 32 km SSW 192m alt. 47 minutes ago		-	Calm (5 kph at 224).
Grotto wx 35 km NE 321m alt. 26 minutes ago	11° C	Dry	Wind obs. (6 kph from 251 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	14° C	Dry and partly cloudy.	Light winds from the N (13 kph at 0).	16 km Low: broken Mid: broken
Grotto wx 39 km NE 1101m alt. 24 minutes ago	2° C	-	Calm (0 kph at 67).
Auburn 39 km SW 119m alt. 57 minutes ago		-	Calm (3 kph at 207).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	2° C	-	Light winds from the WNW (15 kph at 290).	16 km Low: few Mid: few High: scattered
SHIP4130 43 km W 15m alt. 2 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.