Port Arthur weather in March

In March, Port Arthur sees average daytime highs of 70°F and overnight lows near 56°F, with 3.9 in of rain across 9.5 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 67°F in the first days to 73°F by the end. The sky is clear or mostly clear about 32% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of March to 12 h 12 min by month's end. Set against the rest of the year, March is Port Arthur's 7th-clearest and 2nd-windiest month. For the whole year in context, see Port Arthur's year-round climate.

Daytime high
70°
8th warmest
Overnight low
56°
5th coldest
Rainfall
3.9 in
9.5 wet days
Daylight
11 h 48 min
6:32 AM – 6:19 PM
Cloud cover
57%
7th clearest
Wind
9 mph
2nd windiest
Solar energy
4.62 kWh/m²
Travel score
6.6
out of 10

Port Arthur is city in Jefferson County, Texas, United States.

Density
148/km²
people per km²
Founded
1895

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 67°F in the first days to 73°F by the end.

A typical March day in Port Arthur reaches about 70°F in the afternoon and slips back to 56°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 61°F and 78°F. Set against its neighbours, March runs about 6°F warmer than February and about 6°F cooler than April.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
16752
26752
36752
46753
56853
66853
76853
86853
96954
106954
116954
126955
137055
147055
157055
167056
177156
187156
197156
207157
217257
227257
237257
247258
257258
267358
277358
287358
297359
307359
317359

How March really feels in Port Arthur

Once humidity and wind are folded in, March averages 0 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
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

March sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Port Arthur weather by month

How March compares with the rest of the year at a glance. March is the 8th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan61° / 46°4.79.810.35.1
Feb64° / 49°3.48.710.95.9
Mar70° / 56°3.99.511.86.6
Apr76° / 62°4.49.412.77.0
May83° / 69°3.810.713.56.0
Jun87° / 75°5.215.113.94.2
Jul89° / 77°4.215.913.73.6
Aug89° / 76°4.815.713.13.6
Sep86° / 72°5.412.312.24.8
Oct79° / 63°4.18.811.37.1
Nov70° / 53°4.38.610.56.8
Dec63° / 48°4.79.510.15.6

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 15% of March, with mostly cloudy or overcast conditions the remaining 53%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24555
34555
44654
54654
64654
74555
84555
94555
104555
114654
124555
134555
144654
154654
164753
174852
184852
194951
205050
215050
224951
234951
244951
254951
264951
274951
284951
294852
304753
314753

Chance of precipitation in March

Any precipitation

Port Arthur gets around 3.9 in of rain over 9.5 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
131
231
331
431
531
631
731
831
931
1031
1131
1230
1330
1430
1529
1629
1729
1829
1928
2028
2129
2229
2329
2430
2530
2631
2731
2832
2932
3033
3133

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the dry band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 18% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1571518100
2561518110
3571418110
4551419120
5551419120
6541519120
7531519130
8521520130
9521520130
10501521140
11491521140
12481621150
13471622150
14461622150
15451622161
16441722161
17431722171
18421723171
19411723181
20401723181
21401723191
22391723201
23381723211
24371723211
25371723222
26361722222
27361722232
28351722242
29351721243
30341721253
31341721254

Wind in March

Winds average 9 mph in March.

Across March, daily wind ranges from about 9 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 h 18 min at the start of March to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over March. Sunrise moves from 6:49 AM to 6:14 AM, and sunset from 6:09 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.36:496:09
211.46:486:09
311.46:476:10
411.46:466:11
511.46:456:11
611.56:446:12
711.56:436:13
811.56:426:14
911.66:406:14
1011.66:396:15
1111.66:386:15
1211.76:376:16
1311.76:366:17
1411.76:356:17
1511.76:336:18
1611.86:326:19
1711.86:316:19
1811.86:306:20
1911.96:286:21
2011.96:276:21
2111.96:266:22
2212.06:256:22
2312.06:246:23
2412.06:226:24
2512.16:216:24
2612.16:206:25
2712.16:196:26
2812.16:176:26
2912.26:166:27
3012.26:156:27
3112.26:146:28

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.62 kWh/m².

For context, solar energy here swings from a low near 2.67 kWh/m² to a high of 6.21 kWh/m² in July across the year — March's 4.62 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.0Bright
24.0Bright
34.1Bright
44.1Bright
54.2Bright
64.2Bright
74.3Bright
84.3Bright
94.3Bright
104.4Bright
114.4Bright
124.5Bright
134.5Bright
144.5Bright
154.6Bright
164.6Bright
174.7Bright
184.7Bright
194.8Bright
204.8Bright
214.8Bright
224.9Bright
234.9Bright
244.9Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.1Bright
305.1Bright
315.1Bright
Planning a trip in March

Hazard calendar for Port Arthur

In seasonPeak

None of Port Arthur's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Port Arthur sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is March a good time to visit Port Arthur?

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

6.6
Sightseeing
4th-best month of the year
4.2
Beach & pool
8th-best month of the year

March is a reasonable time to visit Port Arthur for sightseeing.

What to pack for Port Arthur in March

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

In March, Port Arthur sees daytime highs around 70°F and nights near 56°F. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

Sea temperature near Port Arthur in March

The nearest coast averages about 64°F in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 mi away) is warmest in August at about 86°F and coldest in January near 58°F.

It's comfortable for a long swim from Apr 3 to Nov 19 — about 7.6 months when the water holds above 68°F.

60°70°80°90°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan58Bracing
Feb59Cool
Mar64Cool
Apr71Refreshing
May78Warm
Jun84Tropical
Jul86Tropical
Aug86Tropical
Sep84Tropical
Oct77Warm
Nov69Refreshing
Dec62Cool

UV index in Port Arthur in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Port Arthur peaks around July 14 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 highExtremeVery highHighModerateJul 14UV 10Dec 20UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7High
Apr10Very high
May10Extreme
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov5Moderate
Dec4Moderate

Air quality in Port Arthur in March

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Port Arthur is worst in July — around 22 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (December, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1522 µg/m³Dec 168 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar12Good
Apr11Good
May13Moderate
Jun18Moderate
Jul22Moderate
Aug17Moderate
Sep14Moderate
Oct11Good
Nov9Good
Dec8Good
Location & terrain

Where is Port Arthur?

Port Arthur sits at 29.9°N, 93.9°W, 7 ft above sea level, in United States. The nearest listed city is Groves, 4.3 mi away.

Topography around Port Arthur

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

Within 2 miles, the terrain around Port Arthur has only modest variations in elevation — a maximum elevation change of 56 ft around an average of 7 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 75 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 190 ft.

The land around Port Arthur is covered by artificial surfaces (28%), grassland (24%) and trees (22%) within 2 miles, water (36%) and wetland (30%) within 10 miles, and trees (35%) and water (32%) within 50 miles.

2 miles
56 ft
10 miles
75 ft
50 miles
190 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
March weather nearby: Groves 4.3 mi · Nederland 6.8 mi · Beaumont 17 mi · Orange 19 mi · Sulphur 42 mi · Lake Charles 50 mi · Baytown 63 mi · Galveston 65 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 Port Arthur (29.8852°, -93.9423°, elevation 7 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).