Opelousas weather in May

In May, Opelousas sees average daytime highs of 85°F and overnight lows near 66°F, with 4.1 in of rain across 9.6 wet days and about 13.5 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 82°F in the first days to 88°F by the end. The sky is clear or mostly clear about 39% of the time in May, and the air most often feels muggy.

Daylight stretches from about 13 h 12 min at the start of May to 13 h 48 min by month's end. Set against the rest of the year, May is Opelousas's 4th-clearest and 7th-windiest month. For the whole year in context, see Opelousas's year-round climate.

Daytime high
85°
5th warmest
Overnight low
66°
8th coldest
Rainfall
4.1 in
9.6 wet days
Daylight
13 h 30 min
5:18 AM – 6:51 PM
Cloud cover
52%
4th clearest
Wind
7 mph
7th windiest
Solar energy
6.16 kWh/m²
Travel score
5.4
out of 10

Opelousas is parish seat of St. Landry Parish, Louisiana, United States.

Founded
1720

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 82°F in the first days to 88°F by the end.

A typical May day in Opelousas reaches about 85°F in the afternoon and slips back to 66°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 91°F. Set against its neighbours, May runs about 7°F warmer than April and about 5°F cooler than June.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18262
28262
38263
48363
58363
68364
78364
88464
98465
108465
118465
128465
138565
148566
158566
168566
178567
188667
198667
208667
218667
228668
238768
248768
258769
268769
278769
288769
298870
308870
318870

How May really feels in Opelousas

Once humidity and wind are folded in, May averages 7 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
7
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Opelousas weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan61° / 43°5.19.610.25.2
Feb65° / 46°4.39.210.95.9
Mar71° / 52°4.49.911.86.7
Apr78° / 58°4.59.212.76.9
May85° / 66°4.19.613.55.4
Jun90° / 73°4.713.813.93.7
Jul91° / 74°5.117.213.83.1
Aug91° / 74°4.915.413.13.1
Sep88° / 70°3.910.712.24.5
Oct80° / 60°3.97.411.37.0
Nov70° / 50°3.68.310.57.0
Dec63° / 45°4.89.310.15.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 21% of May, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36040
46040
55941
65941
75842
85842
95941
105941
115941
125941
136040
146040
156040
166139
176238
186238
196238
206238
216139
226139
236040
246040
255941
265941
275842
285743
295743
305743
315644

Chance of precipitation in May

Any precipitation

Opelousas gets around 4.1 in of rain over 9.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 31% and peaks near 42% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
127
227
327
426
526
626
726
826
926
1026
1126
1227
1327
1427
1528
1628
1729
1830
1930
2031
2132
2233
2334
2435
2536
2637
2738
2839
2940
3041
3142

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the muggy band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 60% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
124162129110
223152130110
322152030120
421152031130
520152032140
618152033140
717142033150
817142034160
916141935160
1015131935170
1114131936170
1214131936180
1313121936190
1412122037190
1512112037200
1611112038210
1710102038210
1810102038220
19991939230
20891939240
21881940250
22781840271
23681740281
24571740301
25571640311
26471540331
27371440361
28261339381
29261238402
30261137422
31161036442

Wind in May

Winds average 7 mph in May.

Across May, daily wind ranges from about 6 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
18light breeze
27light breeze
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 12 min at the start of May to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over May. Sunrise moves from 5:30 AM to 5:11 AM, and sunset from 6:41 PM to 7:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:306:41
213.25:296:41
313.25:296:42
413.25:286:43
513.35:276:43
613.35:266:44
713.35:256:45
813.45:246:45
913.45:236:46
1013.45:236:47
1113.45:226:47
1213.45:216:48
1313.55:206:49
1413.55:206:49
1513.55:196:50
1613.55:186:51
1713.65:186:51
1813.65:176:52
1913.65:176:53
2013.65:166:53
2113.65:166:54
2213.75:156:55
2313.75:156:55
2413.75:146:56
2513.75:146:56
2613.75:136:57
2713.75:136:58
2813.85:126:58
2913.85:126:59
3013.85:126:59
3113.85:117:00

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.16 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.62 kWh/m² to a high of 6.16 kWh/m² in May across the year — May's 6.16 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in May

Is May a good time to visit Opelousas?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.4
Sightseeing
7th-best month of the year
7.0
Beach & pool
2nd-best month of the year

May is a reasonable time to visit Opelousas for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Opelousas in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Opelousas sees daytime highs around 85°F and nights near 66°F. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

UV index in Opelousas in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Opelousas peaks around July 13 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highExtremeVery highHighModerateJul 13UV 10Dec 20UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7High
Apr10Extreme
May10Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec4Moderate

Air quality in Opelousas in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Opelousas is worst in July — around 24 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (January, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1624 µg/m³Jan 139 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar12Good
Apr12Good
May16Moderate
Jun20Moderate
Jul24Moderate
Aug19Moderate
Sep15Moderate
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Opelousas?

Opelousas sits at 30.5°N, 92.1°W, 66 ft above sea level, in United States. The nearest listed city is Lafayette, 22 mi away.

Topography around Opelousas

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Opelousas.

Within 2 miles, the terrain around Opelousas has only modest variations in elevation — a maximum elevation change of 98 ft around an average of 72 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 131 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 449 ft.

The land around Opelousas is covered by trees (46%) and grassland (32%) within 2 miles, trees (38%), grassland (34%) and cropland (25%) within 10 miles, and trees (50%) and cropland (29%) within 50 miles.

2 miles
98 ft
10 miles
131 ft
50 miles
449 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Lafayette 22 mi · New Iberia 40 mi · Baton Rouge 53 mi · Zachary 55 mi · Alexandria 58 mi · Central 62 mi · Shenandoah 65 mi · Prairieville 68 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Opelousas (30.5335°, -92.0815°, elevation 66 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).