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Topics / Climate / United States / Louisiana

Was September normal in Louisiana?

September 2026 · 64 counties · data family: climatedata.dev

Much warmer than normal

82.3°FStatewide average temperature, September 2026

Every Louisiana county, September 2026September 2026 was warmer than normal in every county with a figure: 64 much warmer; furthest above normal Claiborne Parish (+7.2°F), least St. Mary Parish (+2.3°F).Choose a county to see its answer. The colour shows how far each county was from its own 1991–2020 normal.
Indicator: Monthly average temperature minus the county's 1991–2020 normal for September, °F (NOAA nClimDiv via climatedata.dev); words from each county's rank in its own recordSource: climatedata.dev us-climate, version 2026-10-25.6c7474e6d8; boundaries: U.S. Census Bureau TIGERweb, counties (generalised), EPSG:5070 (CONUS Albers equal-area)
Every September since 1895, Louisiana statewideSeptember 2026 averaged 82.3°F, +4.5°F against the 1991–2020 normal: the 1st warmest September of 132 since 1895.
72.074.076.078.080.082.084.01900192019401960198020002020normal 77.8°F2026: 82.3°F
Indicator: Monthly average temperature, °F (NOAA nClimDiv via climatedata.dev); normal = NOAA's 1991–2020 normal for that monthSource: climatedata.dev us-climate, version 2026-10-25.6c7474e6d8; NOAA Monthly U.S. Climate Divisional Database (nClimDiv), statewide and national files; climatedata.dev county-climate, version 2026-10-25.b4bbb5298a
Show the numbers (132 rows)
YearSeptember average
202682.3°F
202578.9°F
202478.0°F
202380.7°F
202277.3°F
202176.9°F
202077.6°F
201982.2°F
201880.2°F
201777.0°F
201680.2°F
201578.5°F
201478.1°F
201379.9°F
201277.4°F
201176.0°F
201079.8°F
200977.4°F
200875.4°F
200778.6°F
200675.9°F
200581.3°F
200477.8°F
200376.0°F
200278.6°F
200175.4°F
200077.7°F
199975.8°F
199880.6°F
199778.3°F
199675.7°F
199577.3°F
199475.4°F
199377.9°F
199276.4°F
199175.8°F
199078.7°F
198975.0°F
198877.4°F
198776.1°F
198679.9°F
198576.3°F
198475.1°F
198375.0°F
198275.3°F
198175.2°F
198081.3°F
197975.0°F
197878.1°F
197779.3°F
197675.5°F
197573.4°F
197473.4°F
197377.7°F
197280.2°F
197177.2°F
197079.0°F
196976.0°F
196874.0°F
196773.2°F
196675.9°F
196577.6°F
196477.0°F
196377.1°F
196278.0°F
196176.4°F
196077.1°F
195977.7°F
195878.1°F
195774.8°F
195676.0°F
195579.0°F
195479.0°F
195377.0°F
195275.6°F
195177.6°F
195076.1°F
194976.2°F
194875.1°F
194778.8°F
194676.3°F
194578.6°F
194477.9°F
194374.7°F
194274.7°F
194179.0°F
194074.5°F
193979.6°F
193876.6°F
193776.6°F
193680.4°F
193576.0°F
193475.9°F
193381.1°F
193277.0°F
193180.0°F
193077.4°F
192977.0°F
192875.1°F
192778.2°F
192680.3°F
192581.5°F
192476.3°F
192376.8°F
192277.9°F
192181.3°F
192079.4°F
191977.3°F
191872.9°F
191775.0°F
191676.0°F
191578.5°F
191477.0°F
191375.0°F
191279.4°F
191182.1°F
191079.3°F
190977.5°F
190876.8°F
190778.4°F
190679.6°F
190578.7°F
190478.8°F
190374.9°F
190275.8°F
190175.6°F
190081.4°F
189974.8°F
189878.2°F
189777.1°F
189677.0°F
189579.6°F

All 64 counties, September 2026

Record rank: 1 is the warmest September on record for that county.

1Claiborne Parish82.7°F+7.2°F1 of 132Much warmer than normal
2Webster Parish83.2°F+7.0°F1 of 132Much warmer than normal
3Bienville Parish83.2°F+6.9°F1 of 132Much warmer than normal
4Bossier Parish83.6°F+6.9°F1 of 132Much warmer than normal
5Caddo Parish83.9°F+6.9°F1 of 132Much warmer than normal
6Lincoln Parish82.7°F+6.8°F1 of 132Much warmer than normal
7Union Parish82.6°F+6.7°F1 of 132Much warmer than normal
8De Soto Parish83.5°F+6.6°F1 of 132Much warmer than normal
9Red River Parish83.4°F+6.5°F1 of 132Much warmer than normal
10Jackson Parish82.4°F+6.2°F1 of 132Much warmer than normal
11Morehouse Parish82.3°F+6.1°F2 of 132Much warmer than normal
12West Carroll Parish82.3°F+5.9°F2 of 132Much warmer than normal
13Sabine Parish82.7°F+5.8°F1 of 132Much warmer than normal
14East Carroll Parish82.3°F+5.7°F3 of 132Much warmer than normal
15Natchitoches Parish82.8°F+5.7°F1 of 132Much warmer than normal
16Ouachita Parish82.1°F+5.7°F2 of 132Much warmer than normal
17Winn Parish82.3°F+5.6°F1 of 132Much warmer than normal
18Madison Parish82.2°F+5.3°F2 of 132Much warmer than normal
19Richland Parish82.0°F+5.3°F3 of 132Much warmer than normal
20Tensas Parish82.4°F+5.3°F2 of 132Much warmer than normal
21Vernon Parish82.4°F+5.3°F1 of 132Much warmer than normal
22Caldwell Parish81.9°F+5.2°F1 of 132Much warmer than normal
23Franklin Parish82.1°F+5.2°F2 of 132Much warmer than normal
24Concordia Parish82.3°F+4.9°F3 of 132Much warmer than normal
25Grant Parish82.0°F+4.8°F2 of 132Much warmer than normal
26Rapides Parish82.4°F+4.8°F2 of 132Much warmer than normal
27Catahoula Parish81.9°F+4.7°F3 of 132Much warmer than normal
28Allen Parish82.5°F+4.6°F2 of 132Much warmer than normal
29LaSalle Parish81.6°F+4.6°F2 of 132Much warmer than normal
30Beauregard Parish82.4°F+4.5°F1 of 132Much warmer than normal
31Avoyelles Parish82.2°F+4.4°F2 of 132Much warmer than normal
32Evangeline Parish82.3°F+4.4°F2 of 132Much warmer than normal
33East Feliciana Parish81.6°F+4.3°F3 of 132Much warmer than normal
34West Feliciana Parish81.9°F+4.3°F4 of 132Much warmer than normal
35St. Helena Parish81.4°F+4.1°F3 of 132Much warmer than normal
36Calcasieu Parish82.8°F+4.0°F2 of 132Much warmer than normal
37Jefferson Davis Parish82.6°F+4.0°F3 of 132Much warmer than normal
38Cameron Parish83.1°F+3.9°F2 of 132Much warmer than normal
39Washington Parish81.1°F+3.8°F3 of 132Much warmer than normal
40Pointe Coupee Parish81.7°F+3.6°F3 of 132Much warmer than normal
41Acadia Parish82.1°F+3.5°F5 of 132Much warmer than normal
42East Baton Rouge Parish81.6°F+3.5°F4 of 132Much warmer than normal
43St. Landry Parish81.7°F+3.5°F5 of 132Much warmer than normal
44Tangipahoa Parish81.3°F+3.5°F2 of 132Much warmer than normal
45Ascension Parish82.0°F+3.4°F2 of 132Much warmer than normal
46Livingston Parish81.6°F+3.4°F3 of 132Much warmer than normal
47Vermilion Parish82.4°F+3.4°F5 of 132Much warmer than normal
48Assumption Parish82.1°F+3.1°F2 of 132Much warmer than normal
49St. James Parish82.1°F+3.1°F2 of 132Much warmer than normal
50West Baton Rouge Parish81.4°F+3.1°F7 of 132Much warmer than normal
51Iberville Parish81.5°F+3.0°F7 of 132Much warmer than normal
52St. Tammany Parish81.1°F+3.0°F4 of 132Much warmer than normal
53Lafayette Parish81.6°F+2.9°F9 of 132Much warmer than normal
54St. John the Baptist Parish81.7°F+2.7°F7 of 132Much warmer than normal
55Lafourche Parish82.3°F+2.6°F7 of 132Much warmer than normal
56St. Bernard Parish82.1°F+2.6°F7 of 132Much warmer than normal
57St. Martin Parish81.3°F+2.6°F9 of 132Much warmer than normal
58Terrebonne Parish82.4°F+2.6°F5 of 132Much warmer than normal
59Plaquemines Parish82.6°F+2.5°F7 of 132Much warmer than normal
60Orleans Parish81.7°F+2.4°F9 of 132Much warmer than normal
61St. Charles Parish81.8°F+2.4°F10 of 132Much warmer than normal
62Iberia Parish81.3°F+2.3°F11 of 132Much warmer than normal
63Jefferson Parish82.0°F+2.3°F10 of 132Much warmer than normal
64St. Mary Parish81.6°F+2.3°F9 of 132Much warmer than normal

Get this data

This page's numbers, as JSON:

curl https://visualizedata.org/data/topics/climate/us-la.json

The climatedata.dev API it comes from (live, no key; every month since 1895 with its normal, anomaly and rank):

curl "https://api.climatedata.dev/v1/us-climate/tavg/us-la.json"

Open the JSON

What this can't tell you

  • A statewide average is not the average of its counties: NOAA computes it from its own grid, weighted by area.
  • The most recent months are preliminary and NOAA revises them in the next release.

How the answer is decided

Each month is ranked against the same month in every year on record (since 1895 for most places). The top tenth of the record is 'much warmer than normal', the top third 'warmer', the middle third 'near normal'. Counties are coloured by the same five words.

Sources

Every topic for one county: How's Hennepin County?