Is this weather normal in Union County?

New Jersey · county records since 1895, through September 2026.

Weather › New Jersey › Union County

Union County's warmest year in 131 on record was 2024, at 56.9° on average. Union County has warmed about 0.7° per decade since 1970.

This week

Usual for Oct 28 to Nov 3: highs near 60°, lows near 41°

That is the 1991 to 2020 average for these dates in Union County. The Weather Service forecast fills in below.

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usual high for the datewarmercooler

The last 12 months

Oct: +1.4°OctNov: -0.1°NovDec: -4.7°DecJan 2026: -3.2°JanFeb: -3.7°FebMar: +4.5°MarApr: +2.8°AprMay: +1.1°MayJun: +2.3°JunJul: +0.5°JulAug: +1.1°AugSep: +0.9°Sepwarmercooler

Each bar is a month's average temperature against the usual for that month (1991 to 2020). Ranks compare the same month in every year since 1895.

Every year since 1895

18952025

Rain and drought

Oct: +0.0 inOctNov: -1.4 inNovDec: -0.9 inDecJan 2026: -1.0 inJanFeb: -0.8 inFebMar: -0.2 inMarApr: -1.3 inAprMay: -1.1 inMayJun: -1.6 inJunJul: +1.9 inJulAug: +4.3 inAugSep: +1.7 inSepwetterdrier

Rain and melted snow against the usual for each month. The drought reading is NOAA's Palmer index for the county.

Month by month in Union County

MonthUsual high / lowUsual rainWarmestColdest
January40° / 24°3.5 in42.4° 202318.8° 1918
February43° / 25°2.9 in40.3° 201717.2° 1934
March51° / 32°4.1 in50.4° 201230.4° 1916
April63° / 41°3.8 in56.6° 201744.4° 1907
May73° / 51°4.0 in66.9° 201553.0° 1917
June82° / 60°4.4 in75.0° 202463.3° 1903
July87° / 66°4.8 in79.9° 202070.0° 1895
August85° / 64°4.4 in78.6° 202266.6° 1927
September78° / 57°4.2 in72.2° 201560.8° 1917
October66° / 46°4.2 in62.1° 200747.6° 1925
November55° / 36°3.4 in50.3° 201536.5° 1901
December45° / 29°4.3 in48.3° 201523.0° 1989

Warmest and coldest are the month's whole-month average temperature, with the year it happened.

Towns in Union County

Crime Radar: Linden, Florham Park, Westfield, Watchung, Summit, Plainfield, Carteret, Madison

Nearby counties