Counties in Louisiana by annual precipitation

Ascension Parish had the highest annual precipitation of 64 counties in 2015, at 75.91 inches. Morehouse Parish had the lowest, at 57.01 inches. The median was 68.03 inches and the figure for Louisiana was 67.31 inches. Source: NOAA National Centers for Environmental Information.

Highest75.91Ascension Parish

Lowest57.01Morehouse Parish

Median68.0364 counties

Louisiana67.31History

Map of counties, 2015

Under 62
62 to 67
67 to 68
68 to 69
69 to 73
73 and over

inches, 2015. Source: NOAA NCEI, NOAA Climate at a Glance, January to December precipitation, counties. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2015

inches. Source: NOAA NCEI, NOAA Climate at a Glance, January to December precipitation, counties. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2015 inches	Change on 2014
1	Ascension Parish	75.91	+12%
2	Livingston Parish	74.55	+12%
3	St. Helena Parish	74.52	+17.9%
4	St. James Parish	74.27	+5.8%
5	Assumption Parish	74.15	+12.8%
6	Iberville Parish	73.9	+11.2%
7	East Baton Rouge Parish	73.7	+13.6%
8	Tangipahoa Parish	73.56	+10.8%
9	East Feliciana Parish	73.18	+15.8%
10	St. John the Baptist Parish	73	+8.9%
11	Iberia Parish	72.75	+26.8%
12	St. Mary Parish	72.35	+26.6%
13	West Baton Rouge Parish	71.95	+14.9%
14	St. Martin Parish	71.48	+16.2%
15	Natchitoches Parish	70.59	+39.5%
15	Washington Parish	70.59	+2.7%
17	Sabine Parish	70.51	+44.4%
18	Vernon Parish	69.72	+23.8%
19	Rapides Parish	69.52	+26.7%
20	Acadia Parish	69.45	+15.2%
21	De Soto Parish	69.27	+54.9%
22	Vermilion Parish	69.17	+19.2%
23	West Feliciana Parish	69.05	+10.8%
24	Lafayette Parish	68.83	+10.6%
25	Pointe Coupee Parish	68.77	+14%
26	Grant Parish	68.71	+25.2%
27	Jefferson Davis Parish	68.62	+17.7%
28	Cameron Parish	68.53	+29.1%
29	St. Tammany Parish	68.33	+3.1%
30	Avoyelles Parish	68.31	+27.5%
31	Webster Parish	68.18	+50.2%
32	Terrebonne Parish	68.03	+24.2%
33	Lafourche Parish	68.02	+24.6%
34	Bienville Parish	68.01	+42%
35	Bossier Parish	67.73	+57.6%
36	Calcasieu Parish	67.31	+18.7%
37	Claiborne Parish	66.97	+47.9%
38	Winn Parish	66.95	+24.1%
39	Evangeline Parish	66.91	+26.7%
40	Red River Parish	66.83	+50.5%
41	St. Charles Parish	66.79	+16.6%
42	St. Landry Parish	66.77	+12.7%
43	Caddo Parish	66.51	+59%
44	Lincoln Parish	66.36	+31.2%
45	Jackson Parish	66.02	+23.1%
46	Allen Parish	63.95	+10.5%
47	Orleans Parish	63.86	+8.8%
48	Catahoula Parish	63.81	+11.3%
49	LaSalle Parish	63.67	+14.5%
50	Jefferson Parish	63.38	+19.2%
51	Concordia Parish	63.2	+14.1%
52	Caldwell Parish	62.41	+7.4%
53	Beauregard Parish	61.9	+9.4%
54	Plaquemines Parish	61.82	+13.3%
55	Union Parish	61.31	+27%
56	Madison Parish	60.82	-1%
57	Franklin Parish	60.67	+4.1%
58	St. Bernard Parish	60.53	+6%
59	Tensas Parish	60.48	+0.7%
60	East Carroll Parish	60.36	+2.1%
61	West Carroll Parish	59.86	+6.6%
62	Ouachita Parish	59.83	+10.7%
63	Richland Parish	58.42	+5.3%
64	Morehouse Parish	57.01	+11.7%

Other periods

About this ranking

Total precipitation from January to December, in inches: rain plus the water content of snow and other frozen precipitation. NOAA computes it from its climate divisional dataset (nClimDiv): station readings interpolated onto a 5 km grid and averaged over the area.

Values are area averages, not the reading at one weather station. NOAA revises the last two years every month.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December precipitation, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

NOAA National Centers for Environmental Information. (2026). NOAA Climate at a Glance, January to December precipitation, counties (Counties in Louisiana by annual precipitation, 2015) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping

MLA 9

NOAA Climate at a Glance, January to December precipitation, counties, Counties in Louisiana by annual precipitation, 2015. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Invokely, https://invokely.ai/rankings/annual-precipitation/louisiana-counties?period=2015. Accessed 12 Oct. 2026.

Chicago (author-date)

NOAA National Centers for Environmental Information. 2026. NOAA Climate at a Glance, January to December precipitation, counties. Counties in Louisiana by annual precipitation, 2015. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Also distributed by Invokely, https://invokely.ai/rankings/annual-precipitation/louisiana-counties?period=2015.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December precipitation, counties, Counties in Louisiana by annual precipitation, 2015 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping, via Invokely: https://invokely.ai/rankings/annual-precipitation/louisiana-counties?period=2015 (Accessed: 12 October 2026).

BibTeX

@misc{noaa_counties_in_louisiana_by_2015,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December precipitation, counties: Counties in Louisiana by annual precipitation, 2015}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/annual-precipitation/louisiana-counties?period=2015. Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December precipitation, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.},
}

RIS

TY  - DATA
AU  - NOAA National Centers for Environmental Information
TI  - NOAA Climate at a Glance, January to December precipitation, counties: Counties in Louisiana by annual precipitation, 2015
PY  - 2026
DA  - 2026/10/06
PB  - NOAA National Centers for Environmental Information
DB  - Invokely
UR  - https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping
L2  - https://invokely.ai/rankings/annual-precipitation/louisiana-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/annual-precipitation/louisiana-counties?period=2015.
N1  - Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December precipitation, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.
ER  -

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Questions

Which county has the highest annual precipitation?

Ascension Parish, with 75.91 inches in 2015, according to NOAA National Centers for Environmental Information.

Which county has the lowest annual precipitation?

Morehouse Parish, with 57.01 inches in 2015.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: NOAA National Centers for Environmental Information, NOAA Climate at a Glance, January to December precipitation, counties. Retrieved 2026-10-12.