Is this weather normal in St. Tammany Parish?

Louisiana · county records since 1895, through September 2026.

Weather › Louisiana › St. Tammany Parish

St. Tammany Parish just had its 4th-warmest September in 132 years, +3° against the usual. 11 of the last 12 months ran warmer than usual there.

This week

Usual for Oct 28 to Nov 3: highs near 75°, lows near 52°

That is the 1991 to 2020 average for these dates in St. Tammany Parish. The Weather Service forecast fills in below.

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usual high for the datewarmercooler

The last 12 months

Oct: +3.2°OctNov: +3.7°NovDec: +1.7°DecJan 2026: +0.8°JanFeb: +3.0°FebMar: +4.8°MarApr: +3.2°AprMay: -0.9°MayJun: +1.3°JunJul: +1.9°JulAug: +2.6°AugSep: +3.0°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: -0.8 inOctNov: -3.8 inNovDec: +0.8 inDecJan 2026: -1.2 inJanFeb: -2.5 inFebMar: -0.5 inMarApr: -1.2 inAprMay: +7.7 inMayJun: +4.6 inJunJul: -3.9 inJulAug: -1.7 inAugSep: -1.2 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 St. Tammany Parish

MonthUsual high / lowUsual rainWarmestColdest
January62° / 41°5.8 in65.1° 195038.7° 1940
February66° / 44°4.8 in64.9° 201842.2° 1895
March72° / 50°5.2 in69.5° 202051.5° 1915
April78° / 56°5.4 in72.6° 190862.2° 1993
May85° / 64°5.3 in78.4° 202469.5° 1917
June90° / 71°6.5 in83.4° 201176.6° 1961
July91° / 73°6.9 in85.2° 202378.6° 1923
August91° / 73°6.5 in87.8° 202378.1° 1931
September88° / 68°4.8 in82.1° 201973.2° 1967
October80° / 58°4.0 in76.4° 191961.1° 1952
November70° / 47°4.1 in68.0° 202450.5° 1976
December64° / 43°5.1 in63.1° 202143.4° 1963

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

Towns in St. Tammany Parish

Crime Radar: Mandeville, Covington, Pearl River

Nearby counties