Temperature
66 F at 9 PM; 88 F at its warmest, 4 PM, and 52 F at its coolest, 5 AM.
- Now
- 66F
- 9 PM
- Highest
- 88F
- 4 PM
- Lowest
- 52F
- 5 AM
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Airports/California/Byron Airport
Byron Airport, California
Small airport in Contra Costa County, California70°
90°/60°
Clear·
Feels like 70°·Light breeze 5 mph SSW
Now. Byron Airport is 70° and clear at 9 PM. The dew point is 39°, so the air feels dry and comfortable. Light breeze from the south-southwest at 5 mph.
Today and tonight. Tonight falls to about 63° by 6 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 89°, and the coolest Tuesday, near 69°. The days ahead look dry. The windiest day is Monday, with wind to 23 mph.
The sky now. The Moon is a waxing crescent, 35% lit, and sets at 10:35 PM. The next full Moon is Sunday, Oct 25. Look for Saturn, bright in the 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 13 minutes long, 2 minutes shorter than yesterday.
0UV Low
32Air quality
28%Humidity
0%Cloud
Now
9:00 PM
70feels70
now, clear
Today
Oct 16
9060
UV 6
Sat
Oct 17
8963
UV 6
Sun
Oct 18
8358
16mph
UV 6
Mon
Oct 19
7054
23mph
Tue
Oct 20
6953
25%
Wed
Oct 21
7254
28%
Thu
Oct 22
7155
mostly clear day
70°
90°60°
89°63°
83°58°
70°54°
69°53°
72°54°
71°55°
As of 9:00 PM in Byron Airport, California.
Air quality
The air at Byron Airport
Index 32, good, led by ozone. Read at 9 PM from its reporting area, Livermore (CA), 13 miles off.
32Good
- Fine particles (PM2.5)22Good-
- Ozone32Good32 ppb12.2 mi
- Nitrogen dioxide10Good11.4 ppb12.2 mi
- Sulfur dioxide1Good1.4 ppb12.2 mi
- Carbon monoxide-0.5 ppm12.2 mi
The days ahead
Highest 58, moderate, Sat Oct 17, led by ozone. Yesterday measured 45, good.
GoodModerate
- 45YesterdayOct 15
- 50TodayOct 16
- 58SatOct 17
- 46SunOct 18
- 43MonOct 19
- GoodTueOct 20
- GoodWedOct 21
Smoke, the next 45 hours
Little smoke near the ground through Sun 5 PM: the index from smoke stays at 6 or under.
Precipitation
What has fallen at Byron Airport
None in the last 3 days, to Fri 8 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 Byron Airport, the next 45 hours
Visibility stays 10 miles or more through Sun 5 PM.
F
Now, today, and the week
Weather instrument stations by state
Airfield
- Code
- C83
- ICAO
- -
- IATA
- -
- Field elevation
- 79 ft
- Serves
- Byron
- Kind
- Small airport
- Scheduled service
- No
- Its own instrument
- C83
- Wind now
- From 270° at 9 mph, read 16 Oct, 21:20
Runways
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 05 / 23 | 3,000 ft | 75 ft | Asphalt | 62° / 242° | 8 mph head, on 23 | 4 mph from the right |
| 12 / 30 | 4,500 ft | 100 ft | Asphalt | 135° / 315° | 6 mph head, on 30 | 6 mph from the left |
Measured here
What the airfield's own instrument measured, the last 24 hours
Every hour from Byron (C83), Byron Airport's own instrument, measure by measure, on the field's own clock.
Humidity and dew point
A dew point of 37 F, the air 34% saturated; the humidity ran from 12% at 3 PM to 53% at 5 AM.
- Dew point now
- 37F
- 9 PM
- Humidity now
- 34%
- Humidity, range
- 12 to 53%
How it is measured: Humidity variables, Field Book FB-WAT-002
Wind
8 mph from the west southwest at 9 PM; at its strongest 9 mph, 7 AM, with a gust of 16 mph at 10 AM.
- Now
- 8mph
- from the west southwest
- Strongest
- 9mph
- 7 AM
- Highest gust
- 16mph
- 10 AM
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
Pressure
30.04 inHg at 9 PM, steady over 3 hours; 0.01 inHg lower than a day before.
- Now
- 30.04inHg
- 9 PM
- 3 hours
- +0.02inHg
- steady
- 24 hours
- -0.01inHg
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Visibility
Down to 8 miles at 1 PM; 10 miles or more now.
- Now
- 10+mi
- Lowest
- 8mi
- 1 PM
- Hours under a mile
- 0
How it is measured: Fog types, Field Book FB-WAT-020
Cloud base
The lowest cloud base came down to 3,300 ft at 11 PM Thursday; a base was reported in 1 of the hours.
- Lowest base now
- -
- Lowest in 24 hours
- 3,300ft
- 11 PM Thursday
- Hours with a base reported
- 1
How it is measured: Cloud classification, Field Book FB-SKY-001
Precipitation
None measured in the gauge in the last 24 hours.
- Last 24 hours
- 0.00in
- Wettest hour
- -
- Hours with some
- 0
How it is measured: ASOS, Field Book FB-INS-002
Byron: every reading, the last 7 days, 30 days and the year, and how well it reports
What is measuring near here
The 5 instruments nearest Byron Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.
measured now3 instruments
ByronC83
At an airfield/0.2 mi away/52 ft/27 ft below here
temp, wind, gust, visibility, precip, pressure
Byron 5SSE - Harvey BanksHOBC1
At a river or reservoir gauge/1.7 mi away/22 ft/57 ft below here
temp, wind, gust, humidity, pressure
I-580 - I-205CF133
Beside a road/6.5 mi away/301 ft/222 ft above here
temp, pavement temp, wind, visibility, precip
measured daily2 instruments
Tracy Pumping PlantTRPC1
At a cooperative observer's station/3.0 mi away/56 ft/23 ft below here
snowfall, snow depth, precip, high, low
Brentwood 2.5 SSWCA-CC-36
In a volunteer observer's own ground/7.5 mi away/182 ft/103 ft above here
precip, snowfall, snow depth
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 Byron Airport
The nearest places, each with its own forecast and the instruments nearest it.
- Byroncommunity, 4 mi
- Mountain Housecommunity, 6 mi
- Discovery Baycommunity, 6 mi
- Brentwoodcity, 9 mi
- Knightsencommunity, 9 mi
- Tracycity, 12 mi
- Oakleycity, 12 mi
- Livermorecity, 13 mi
- Bethel Islandcommunity, 14 mi
- Camino Tassajaracommunity, 14 mi
- Antiochcity, 15 mi
- Blackhawkcommunity, 15 mi
Airports near Byron Airport
- Tracy Municipal AirportTCY, 14 mi
- Livermore Municipal AirportLVK, 14 mi
- Stockton Metropolitan AirportSCK, 21 mi
- Buchanan FieldCCR, 26 mi
- Hayward Executive AirportHWD, 30 mi
- Oakland San Francisco Bay AirportOAK, 34 mi
- Travis Air Force BaseSUU, 34 mi
- Reid-Hillview Airport of Santa Clara CountyRHV, 36 mi