Temperature
70 F at 12 AM; 87 F at its warmest, 2 PM Thursday, and 61 F at its coolest, 7 AM Thursday.
- Now
- 70F
- 12 AM
- Highest
- 87F
- 2 PM Thursday
- Lowest
- 61F
- 7 AM Thursday
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Cobb County International Airport-McCollum Field, Georgia
Medium airport in Cobb County, Georgia71°
84°/64°
Clear·
Feels like 71°·Light air 3 mph WSW
Coming up. Tomorrow is 20 degrees cooler: a high of 64° after 84° today.
Now. Cobb County International Airport-McCollum Field is 71° and clear at 1 AM. The dew point is 65°, so the air feels humid and sticky. Light air from the west-southwest at 3 mph.
Today and tonight. It warms to about 83° by 3 PM. Tonight falls to about 48° by 8 AM, under a mostly clear sky. No rain is expected for the rest of the day. The sun is strong around midday: UV index 7, high. Unprotected skin can burn in under half an hour. Air quality is moderate (index 64): fine for most people, though people unusually sensitive to air pollution may feel it outdoors.
The week. The warmest day ahead is Wednesday, near 75°, and the coolest tomorrow, near 64°. The days ahead look dry.
The sky tonight. The sun sets at 7:03 PM. The Moon is a waxing crescent, 33% lit, and sets at 11:14 PM. The next full Moon is Monday, Oct 26. After dark, look for Saturn, bright in the east-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 20 minutes long, 2 minutes shorter than yesterday.
0UV Low
64Air quality
84%Humidity
0%Cloud
Now
1:00 AM
71feels71
now, clear
Today
Oct 16
8464
20%
18mph
UV 7
Sat
Oct 17
6448
18mph
UV 7
Sun
Oct 18
6444
UV 7
Mon
Oct 19
6844
UV 7
Tue
Oct 20
7346
UV 7
Wed
Oct 21
7549
UV 7
Thu
Oct 22
7550
UV 7
71°
84°64°
64°48°
64°44°
68°44°
73°46°
75°49°
75°50°
As of 1:00 AM in Cobb County International Airport-McCollum Field, Georgia.
Air quality
The air at Cobb County International Airport-McCollum Field
Index 64, moderate, led by fine particles. Read at 12 AM from its reporting area, Atlanta (GA), 27 miles off.
64Moderate
- Fine particles (PM2.5)64Moderate-
- Ozone35Good-
- Coarse particles (PM10)24Good-
The days ahead
Moderate each day through Today, led by ozone. Yesterday measured 74, moderate.
GoodModerate
- 74YesterdayOct 15
- 58TodayOct 16
Smoke, the next 44 hours
Smoke near the ground peaks at index 55, moderate, Fri 7 AM.
Precipitation
What has fallen at Cobb County International Airport-McCollum Field
None in the last 3 days, to Fri 12 AM. 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 Cobb County International Airport-McCollum Field, the next 44 hours
Visibility stays 10 miles or more through Sat 8 PM.
F
Now, today, and the week
Weather instrument stations by state
Airfield
- Code
- RYY
- ICAO
- KRYY
- IATA
- -
- Field elevation
- 1,040 ft
- Serves
- Atlanta
- Kind
- Medium airport
- Scheduled service
- No
- Its own instrument
- RYY
- Wind now
- From 210° at 6 mph, read 15 Oct, 23:50
Runways
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 09 / 27 | 6,295 ft | 100 ft | Asphalt | 89° / 269° | 3 mph head, on 27 | 5 mph from the left |
Measured here
What the airfield's own instrument measured, the last 24 hours
Every hour from Marietta (RYY), Cobb County International Airport-McCollum Field's own instrument, measure by measure, on the field's own clock.
Humidity and dew point
A dew point of 65 F, the air 84% saturated; the humidity ran from 46% at 2 PM Thursday to 100% at 4 AM Thursday.
- Dew point now
- 65F
- 12 AM
- Humidity now
- 84%
- Humidity, range
- 46 to 100%
How it is measured: Humidity variables, Field Book FB-WAT-002
Wind
4 mph from the southwest at 12 AM; at its strongest 7 mph, 12 PM Thursday, and no gust reported.
- Now
- 4mph
- from the southwest
- Strongest
- 7mph
- 12 PM Thursday
- Highest gust
- -
- none reported
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
Pressure
30.10 inHg at 12 AM, steady over 3 hours; 0.02 inHg lower than a day before.
- Now
- 30.10inHg
- 12 AM
- 3 hours
- +0.00inHg
- steady
- 24 hours
- -0.02inHg
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Visibility
Down to 5 miles at 7 AM Thursday; 10 miles or more now.
- Now
- 10+mi
- Lowest
- 5mi
- 7 AM Thursday
- 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 5,000 ft at 4 PM Thursday; a base was reported in 2 of the hours.
- Lowest base now
- -
- Lowest in 24 hours
- 5,000ft
- 4 PM Thursday
- Hours with a base reported
- 2
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
Marietta: 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 Cobb County International Airport-McCollum Field, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.
measured now3 instruments
MariettaRYY
At an airfield/0.1 mi away/1,040 ft/level with here
temp, wind, gust, visibility, precip, pressure
I-75 @ SR 120 / South Marietta Pkwy GAGA308
Beside a road/5.1 mi away/1,063 ft/23 ft above here
temp, pavement temp, wind, visibility, precip
DallasDLSG1
At a river or reservoir gauge/12.2 mi away/1,073 ft/33 ft above here
temp, wind, gust, humidity, pressure
measured daily2 instruments
Kennesaw 0.2 SSEGA-CB-51
In a volunteer observer's own ground/1.2 mi away/1,114 ft/74 ft above here
precip, snowfall, snow depth
DallasDALG1
At a cooperative observer's station/8.8 mi away/1,070 ft/30 ft above here
snowfall, snow depth, precip, high, low
What the snow tracker reads here
Every instrument in this state
-
Snow on the ground
Elsewhere in Georgia
23 places, each with its own forecast and its own instruments.
AlbanycityAthenscityAtlantacityAugustacityBlairsvillecityBlue RidgetownBrasstown BaldfeatureBrunswickcityChattahoochee National ForestfeatureColumbuscityDahlonegacityDaltoncityGainesvillecityHelencityJekyll IslandfeatureLake LanierfeatureMaconcityOkefenokee SwampfeatureRomecitySavannahcityTybee IslandtownValdostacityWarner Robinscity
Near Cobb County International Airport-McCollum Field
The nearest places, each with its own forecast and the instruments nearest it.
- Kennesawcity, 2 mi
- Kennesaw State Universitycommunity, 2 mi
- Acworthcity, 5 mi
- Mariettacity, 5 mi
- Fair Oakscommunity, 7 mi
- Woodstockcity, 8 mi
- Smyrnacity, 11 mi
- Powder Springscity, 11 mi
- Mountain Parkcity, 12 mi
- Emersoncity, 12 mi
- Viningscommunity, 13 mi
- Hiramcity, 13 mi
Airports near Cobb County International Airport-McCollum Field
- Dobbins Air Reserve BaseMGE, 8 mi
- Cartersville AirportVPC, 16 mi
- Fulton County Airport Brown FieldFTY, 17 mi
- DeKalb Peachtree AirportPDK, 19 mi
- Silver Comet Field at Paulding Northwest Atlanta AirportPUJ, 21 mi
- Cherokee County Regional AirportCNI, 23 mi
- Hartsfield Jackson Atlanta International AirportATL, 28 mi
- Pickens County AirportJZP, 31 mi