KnoxvilleKNXC1
At a river or reservoir gauge/8.5 mi away/2,484 ft/1,205 ft above here
temp, wind, gust, humidity, pressure
Weather/California/Hidden Valley Lake
Hidden Valley Lake, California
Community in Lake County, California* AFFECTED AREA...Fire weather zones 418 including Lake Pillsbury, 419 including the City of Clearlake, Middletown, Lower Lake, and Indian Valley Reservoir, and 420 including Cobb and Mount Konocti. * WIND...Sustained winds of 15 to 25mph with gusts to 35 mph possible in exposed areas. * HUMIDITY...Low overnight recoveries of 30-35% will drop to 10- 20% through the morning. Very poor RH recovery into Friday. * IMPACTS...any fires that develop will likely spread rapidly.
A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
73°
91°/61°
Clear·
Feels like 73°·Gentle breeze 10 mph NNE
Alert. A Red Flag Warning is in force for Hidden Valley Lake until 11 AM tomorrow. Read the alert in full, and see what it means in the Field Book.
Now. Hidden Valley Lake is 73° and clear at 11 PM. The dew point is 39°, so the air feels dry and comfortable. Gentle breeze from the north-northeast at 10 mph.
Today and tonight. Tonight falls to about 68° by 7 AM, under a mostly clear sky. No rain is expected for the rest of the day.
The week. The warmest day ahead is tomorrow, near 90°, and the coolest Tuesday, near 66°. The days ahead look dry.
The sky now. The Moon is a waxing crescent, 27% lit, and stays below the horizon until dawn. The next full Moon is Sunday, Oct 25. Look for Saturn, bright in the south-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. The sky is forecast to stay clear: a good night to look up. The day is 11 hours 14 minutes long, 2 minutes shorter than yesterday.
0UV Low
47Air quality
51%Humidity
12%Cloud
Now
11:00 PM
73feels73
now, clear
Today
Oct 15
9161
13mph
UV 6
Fri
Oct 16
9067
UV 6
Sat
Oct 17
8864
UV 6
Sun
Oct 18
8059
UV 6
Mon
Oct 19
6849
10%
Tue
Oct 20
6649
28%
Wed
Oct 21
7050
16%
73°
91°61°
90°67°
88°64°
80°59°
68°49°
66°49°
70°50°
As of 11:00 PM in Hidden Valley Lake, California.
Air quality
The air at Hidden Valley Lake
Index 47, good, led by fine particles. Read at 10 PM from its reporting area, Santa Rosa (CA), 26 miles off.
47Good
- Fine particles (PM2.5)47Good-
- Ozone17Good-
The days ahead
Good each day through Tue Oct 20, led by ozone. Yesterday measured 39, good.
GoodModerate
- 39YesterdayOct 14
- 38TodayOct 15
- 39FriOct 16
- GoodSatOct 17
- GoodSunOct 18
- GoodMonOct 19
- GoodTueOct 20
Smoke, the next 43 hours
Little smoke near the ground through Sat 5 PM: the index from smoke stays at 6 or under.
Precipitation
What has fallen at Hidden Valley Lake
None in the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 0.00in
- Last 3 days
- 0.00in
Visibility
How far you can see at Hidden Valley Lake, the next 43 hours
Visibility stays 10 miles or more through Sat 5 PM.
F
Now, today, and the week
On the radar over Hidden Valley Lake, CaliforniaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture
Weather instrument stations by state
What is measuring near here
The 5 instruments nearest Hidden Valley Lake, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.8 miles away.
measured now3 instruments
Rank617of 4,465
Citizen station EW3235EW3235
In a volunteer observer's own ground/17.8 mi away/173 ft/1,106 ft below here
temp, humidity, wind, precip, pressure
Santa RosaSTS
At an airfield/25.0 mi away/103 ft/1,176 ft below here
temp, wind, gust, visibility, precip, pressure
measured daily2 instruments
Hidden Valley Lake 2.7 WCA-LK-18
In a volunteer observer's own ground/0.8 mi away/1,167 ft/112 ft below here
precip, snowfall, snow depth
Middletown 4SEMIDC1
At a cooperative observer's station/5.6 mi away/1,163 ft/116 ft below here
snowfall, snow depth, precip, high, low
Station report
The weather at Santa Rosa, drawn
The nearest airport reporting now, 25.0 mi from Hidden Valley Lake, California. From its report of Oct 15, 2026, 10:53 PM local time: 3 of its 6 sheets.
The sky
No cloud below 12,000 ft; visibility 10 mi or more.
The air
57.0 F with a dew point of 39.0 F, 51 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 4,100 ft up.
The wind
Calm.
The full report of Santa Rosa, in 6 sheets, each beside the Field Book plates that explain it
What the snow tracker reads here
Every instrument in this state
-
Snow on the ground
Elsewhere in California
33 places, each with its own forecast and its own instruments.
Big Bear Mountainski areaBishopcityBridgeporttownChina Peakski areaDodge Ridgeski areaDonner PassfeatureFresnocityHeavenlysurveyed ski areaHomewoodski areaJune Mountainski areaKirkwoodsurveyed ski areaLos AngelescityMammoth LakestownMammoth Mountainsurveyed ski areaMount ShastafeatureMount Shasta CitycityMount Shasta Ski Parkski areaMount WhitneyfeatureMountain Highski areaNorthstarsurveyed ski areaPalisades Tahoesurveyed ski areaReddingcitySacramentocitySan DiegocitySan FranciscocitySierra NevadafeatureSierra-at-Tahoeski areaSnow Valleyski areaSouth Lake TahoecitySugar Bowlski areaSusanvillecityTruckeetownYosemitefeature
Near Hidden Valley Lake
The nearest places, each with its own forecast and the instruments nearest it.
- Middletowncommunity, 5 mi
- Lower Lakecommunity, 8 mi
- Cobbcommunity, 9 mi
- Clearlakecity, 11 mi
- Clearlake Rivieracommunity, 14 mi
- Calistogacity, 15 mi
- Clearlake Oakscommunity, 16 mi
- Angwincommunity, 17 mi
- Rumseycommunity, 18 mi
- Soda Baycommunity, 18 mi
- Spring Valleycommunity, 19 mi
- Deer Parkcommunity, 19 mi