Mercerville, NJ Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Mercerville, NJ.

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Current Conditions — Mercerville, NJ

TRENTON (KTTN)

Mostly Clear

59.0 F
Humidity:36%
Wind Speed: 0.0 mph
Barometer:29.87 in
Dewpoint:32.0 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
May 2 2026, 02:35 PM EDT
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5-Day Forecast — Mercerville, NJ

Saturday

High 62 °F
Mostly Cloudy
Saturday
Night
Low 41 °F
Mostly Cloudy
Sunday

High 62 °F
Partly Sunny
Sunday
Night
Low 44 °F
Partly Cloudy
Monday

High 73 °F
Partly Sunny
Monday
Night
Low 55 °F
Partly Cloudy
Tuesday

High 84 °F
Partly Sunny
Tuesday
Night
Low 62 °F
Slight Chance of Rain
Wednesday

High 75 °F
Chance of Rain Showers

Detailed Forecast — Mercerville, NJ

Saturday
Mostly Cloudy. High near 62°F. Wind 5 to 7 mph, with gusts as high as 13 mph.
Saturday Night
Mostly Cloudy. Low around 41°F. Wind 3 to 6 mph, with gusts as high as 10 mph.
Sunday
Partly Sunny. High near 62°F. Wind 8 to 14 mph, with gusts as high as 25 mph.
Sunday Night
Partly Cloudy. Low around 44°F. Wind 2 to 5 mph, with gusts as high as 8 mph.
Monday
Partly Sunny. High near 73°F. Wind 6 to 12 mph, with gusts as high as 20 mph.
Monday Night
Partly Cloudy. Low around 55°F. Wind around 6 mph, with gusts as high as 10 mph.
Tuesday
Partly Sunny. High near 84°F. Wind 6 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
Slight Chance of Rain. Low around 62°F. Wind 13 to 14 mph, with gusts as high as 24 mph.
Wednesday
Chance of Rain Showers. High near 75°F. Wind 14 to 15 mph, with gusts as high as 28 mph.
Wednesday Night
Thunderstorms Likely. Low around 59°F. Wind 6 to 9 mph, with gusts as high as 16 mph.
Thursday
Rain Showers Likely. High near 69°F. Wind 9 to 12 mph, with gusts as high as 22 mph.
Thursday Night
Rain Showers Likely. Low around 46°F. Wind around 8 mph, with gusts as high as 14 mph.
Friday
Chance of Showers. High near 64°F. Wind 9 to 13 mph, with gusts as high as 22 mph.
NJ Radar
Current Radar • NJ
Day 1 Outlook • May 2, 2026

Observation History — Mercerville, NJ

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
02:35 PM EDT 0.0 10.00 Mostly Clear -- 59.0 32.0 36% NA NA 29.87 1011.5
02:30 PM EDT 0.0 10.00 Clear -- 60.8 33.8 36% NA NA 29.87 1011.5
02:25 PM EDT 10.00 Mostly Clear -- 60.8 32.0 34% NA NA 29.87 1011.5
02:20 PM EDT NW 6.9 10.00 Mostly Clear -- 57.2 32.0 38% NA NA 29.87 1011.5
02:10 PM EDT NW 10.4 G 16.1 10.00 Partly Cloudy -- 59.0 33.8 39% NA NA 29.87 1011.5
01:55 PM EDT NW 5.7 10.00 Mostly Cloudy -- 57.2 % NA NA 29.88 1011.9
01:50 PM EDT 6.9 10.00 Mostly Cloudy -- 57.2 33.8 41% NA NA 29.88 1011.9
01:45 PM EDT 9.2 10.00 Mostly Cloudy -- 59.0 35.6 41% NA NA 29.88 1011.9
01:30 PM EDT 10.4 10.00 Partly Cloudy -- 59.0 35.6 41% NA NA 29.88 1011.9
01:25 PM EDT NW 5.7 10.00 Mostly Clear -- 57.2 35.6 44% NA NA 29.88 1011.9
01:20 PM EDT 10.4 10.00 Mostly Clear -- 57.2 35.6 44% NA NA 29.88 1011.9
01:15 PM EDT 10.4 10.00 Mostly Clear -- 57.2 33.8 41% NA NA 29.88 1011.9
01:05 PM EDT 9.2 10.00 Partly Cloudy -- 57.2 35.6 44% NA NA 29.88 1011.9
01:00 PM EDT 11.5 G 18.4 10.00 Partly Cloudy -- 55.4 35.6 47% NA NA 29.88 1011.9
12:50 PM EDT 9.2 10.00 Mostly Clear -- 55.4 % NA NA 29.89 1012.2
12:45 PM EDT 9.2 10.00 Partly Cloudy -- 55.4 35.6 47% NA NA 29.89 1012.2
12:35 PM EDT 9.2 10.00 Mostly Clear -- 55.4 35.6 47% NA NA 29.89 1012.2
12:30 PM EDT 10.4 G 16.1 10.00 Mostly Clear -- 57.2 35.6 44% NA NA 29.90 1012.5
12:25 PM EDT 10.4 10.00 Partly Cloudy -- 55.4 35.6 47% NA NA 29.90 1012.5
12:20 PM EDT 11.5 10.00 Partly Cloudy -- 55.4 37.4 51% NA NA 29.90 1012.5
12:10 PM EDT 6.9 10.00 Mostly Cloudy -- 55.4 39.2 54% NA NA 29.90 1012.5
12:05 PM EDT 9.2 10.00 Mostly Cloudy -- 57.2 39.2 51% NA NA 29.90 1012.5
12:00 PM EDT 8.1 10.00 Mostly Cloudy -- 55.4 37.4 51% NA NA 29.90 1012.5
11:50 AM EDT 10.4 10.00 Cloudy -- 55.4 39.2 54% NA NA 29.90 1012.5

Regional Weather Observation

TRENTON (KTTN)

Mostly Clear
59.0 F

SOMERVILLE (KSMQ)

Mostly Clear
57.2 F

DOYLESTOWN (KDYL)

Mostly Cloudy
57.2 F

PHILADELPHIA/NE (KPNE)

Partly Cloudy
62.1 F

WRIGHTST/MCGUIRE (KWRI)

Partly Cloudy
59.0 F

PERKASIE (KCKZ)

Mostly Cloudy
57.2 F
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