Temperature
58 F at 1 AM; 66 F at its warmest, 1 PM Thursday, and 51 F at its coolest, 6 AM Thursday.
- Now
- 58F
- 1 AM
- Highest
- 66F
- 1 PM Thursday
- Lowest
- 51F
- 6 AM Thursday
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Airports/New Jersey/Trenton Mercer Airport
Trenton Mercer Airport, New Jersey
Medium airport in Mercer County, New Jersey57°
78°/54°
Overcast·
Feels like 57°·Light breeze 5 mph SE
Coming up. Rain is likely this evening, from about 7 PM (66%).
Now. Trenton Mercer Airport is 57° and overcast at 2 AM. The dew point is 53°, so the air feels dry and comfortable. Light breeze from the southeast at 5 mph.
Today and tonight. It warms to about 78° by 4 PM. Tonight falls to about 46° by 8 AM, under cloud.
The week. The warmest day ahead is Tuesday, near 65°, and the coolest tomorrow, near 53°. Rain is likely tomorrow (62%). Frost is possible Sunday morning, a low of 35°.
The sky tonight. The sun sets at 6:18 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:11 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. Cloud is forecast to cover most of the night, so the sky will be hard to see. The day is 11 hours 8 minutes long, 3 minutes shorter than yesterday.
0UV Low
19Air quality
84%Humidity
100%Cloud
Now
2:00 AM
57feels57
now, overcast
Today
Oct 16
7854
77%
13mph
Sat
Oct 17
5346
62%
15mph
Sun
Oct 18
5635
clear day
Mon
Oct 19
6039
12%
Tue
Oct 20
6543
11%
Wed
Oct 21
6446
13mph
Thu
Oct 22
6245
mostly clear day
57°
78°54°
53°46°
56°35°
60°39°
65°43°
64°46°
62°45°
As of 2:00 AM in Trenton Mercer Airport, New Jersey.
Air quality
The air at Trenton Mercer Airport
Index 19, good, led by ozone. Read at 1 AM from its reporting area, Central (NJ), 27 miles off.
19Good
- Fine particles (PM2.5)11Good23.7 mi
- Ozone19Good14 ppb3.6 mi
- Nitrogen dioxide6Good6 ppb23.7 mi
The days ahead
Good each day through Today, led by ozone. Yesterday measured 17, good.
GoodModerate
- 17YesterdayOct 15
- 40TodayOct 16
Smoke, the next 43 hours
Little smoke near the ground through Sat 8 PM: the index from smoke stays at 6 or under.
Precipitation
What has fallen at Trenton Mercer Airport
None in the last 24 hours; 0.04 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 0.00in
- Last 3 days
- 0.04in
3 days agoLast 24 hours 0%
Visibility
How far you can see at Trenton Mercer Airport, the next 43 hours
Mist or haze: visibility falls to 2 miles Fri 7 AM.
F
Now, today, and the week
Weather instrument stations by state
Airfield
- Code
- TTN
- ICAO
- KTTN
- IATA
- TTN
- Field elevation
- 213 ft
- Serves
- Ewing Township
- Kind
- Medium airport
- Scheduled service
- Yes
- Its own instrument
- TTN
- Wind now
- From 150° at 5 mph, read 16 Oct, 01:53
Runways
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 06 / 24 | 6,006 ft | 150 ft | Asphalt | 46° / 226° | 1 mph head, on 24 | 5 mph from the left |
| 16 / 34 | 4,800 ft | 150 ft | Asphalt | 146° / 326° | 5 mph head, on 16 | None |
Measured here
What the airfield's own instrument measured, the last 24 hours
Every hour from Trenton/Mercer Co. (TTN), Trenton Mercer Airport's own instrument, measure by measure, on the field's own clock.
Humidity and dew point
A dew point of 53 F, the air 83% saturated; the humidity ran from 47% at 3 PM Thursday to 89% at 6 AM Thursday.
- Dew point now
- 53F
- 1 AM
- Humidity now
- 83%
- Humidity, range
- 47 to 89%
How it is measured: Humidity variables, Field Book FB-WAT-002
Wind
5 mph from the south southeast at 1 AM; at its strongest 11 mph, 7 PM Thursday, with a gust of 24 mph at 10 AM Thursday.
- Now
- 5mph
- from the south southeast
- Strongest
- 11mph
- 7 PM Thursday
- Highest gust
- 24mph
- 10 AM Thursday
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
Pressure
30.07 inHg at 1 AM, falling 0.07 inHg over 3 hours; 0.01 inHg lower than a day before.
- Now
- 30.07inHg
- 1 AM
- 3 hours
- -0.07inHg
- falling
- 24 hours
- -0.01inHg
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Visibility
10 miles or more every hour.
- Now
- 10+mi
- Lowest
- 10+mi
- 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 2,900 ft at 1 AM; a base was reported in 6 of the hours.
- Lowest base now
- -
- Lowest in 24 hours
- 2,900ft
- 1 AM
- Hours with a base reported
- 6
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
Trenton/Mercer Co.: every reading, the last 7 days, 30 days and the year, and how well it reports
What is measuring near here
The 4 instruments nearest Trenton Mercer Airport, 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 now2 instruments
At an airfield/0.1 mi away/213 ft/level with here
temp, wind, gust, visibility, precip, pressure
Mount Holly NWSPHIN4
At a river or reservoir gauge/18.2 mi away/42 ft/171 ft below here
temp, wind, gust, humidity, pressure
measured daily2 instruments
Ewing Twp 0.7 WNJ-MC-51
In a volunteer observer's own ground/0.7 mi away/157 ft/56 ft below here
precip, snowfall, snow depth
Ewing 3WNWTSCN4
At a cooperative observer's station/1.6 mi away/177 ft/36 ft below here
snowfall, snow depth, precip, high, low
What the snow tracker reads here
Every instrument in this state
0in
Snow on the ground
Measured at Ewing 3WNW (TSCN4), 1.6 miles from here, read 14 Oct, 23:59. measured daily
Elsewhere in New Jersey
22 places, each with its own forecast and its own instruments.
Atlantic CitycityBarnegat BayfeatureCamdencityCampgawski areaCape MaycityDelaware Water GapfeatureHigh PointfeatureJersey CitycityLong BranchcityMorristowncityMountain Creekski areaNew BrunswickcityNewarkcityPatersoncityPine BarrensfeaturePrincetoncitySandy HookfeatureSussextownToms RivertownTrentoncityVinelandcityWildwoodtown
Near Trenton Mercer Airport
The nearest places, each with its own forecast and the instruments nearest it.
- The College of New Jerseycommunity, 2 mi
- Washington Crossingcommunity, 3 mi
- Penningtonborough, 4 mi
- Titusvillecommunity, 4 mi
- Lawrencevillecommunity, 4 mi
- Trentoncity, 5 mi
- Mercervillecommunity, 7 mi
- Hopewellborough, 8 mi
- White Horsecommunity, 8 mi
- Hamilton Squarecommunity, 9 mi
- Lambertvillecity, 9 mi
- Princetoncity, 10 mi
Airports near Trenton Mercer Airport
- Mc Guire Air Force BaseWRI, 22 mi
- Sky Manor AirportN40, 22 mi
- South Jersey Regional AirportVAY, 23 mi
- Somerset AirportSMQ, 25 mi
- Lakehurst Maxfield Field AirportNEL, 30 mi
- Ocean County AirportMJX, 37 mi
- Monmouth Executive AirportBLM, 37 mi
- Linden AirportLDJ, 38 mi