Carlsbad weather in September

In September, Carlsbad sees average daytime highs of 87°F and overnight lows near 64°F, with 1.6 in of rain across 5.2 wet days and about 12.2 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 90°F in the first days to 84°F by the end. The sky is clear or mostly clear about 66% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Carlsbad's 5th-clearest and 11th-windiest month. For the whole year in context, see Carlsbad's year-round climate.

Daytime high
87°
5th warmest
Overnight low
64°
9th coldest
Rainfall
1.6 in
5.2 wet days
Daylight
12 h 12 min
5:45 AM – 5:57 PM
Cloud cover
32%
5th clearest
Wind
8 mph
11th windiest
Solar energy
5.82 kWh/m²
Travel score
5.7
out of 10

Carlsbad is city in and county seat of Eddy County, New Mexico, United States.

Density
355/km²
people per km²
Founded
1888

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 90°F in the first days to 84°F by the end.

A typical September day in Carlsbad reaches about 87°F in the afternoon and slips back to 64°F overnight — a 23°F spread between the day's warmth and the night's chill. On most days the high lands between 76°F and 95°F. Set against its neighbours, September runs about 7°F cooler than August and about 9°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19068
29068
39068
48967
58967
68967
78867
88866
98866
108766
118765
128765
138765
148765
158664
168664
178664
188664
198663
208563
218563
228562
238562
248562
258561
268561
278461
288460
298460
308359

How September really feels in Carlsbad

Once humidity and wind are folded in, September averages 3 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
3
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

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

Carlsbad weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan58° / 33°0.62.60.910.15.2
Feb63° / 38°0.62.80.710.86.8
Mar71° / 44°0.730.111.88.1
Apr79° / 51°0.72012.88.3
May88° / 61°1.14.1013.65.5
Jun95° / 69°0.74.1014.12.9
Jul95° / 72°1.25.3013.92.8
Aug93° / 71°1.26.2013.23.5
Sep87° / 64°1.65.2012.25.7
Oct77° / 53°1.24.30.111.28.1
Nov66° / 42°0.72.80.410.37.5
Dec58° / 34°0.72.70.99.95.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 66% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 19%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18317
28218
38218
48119
58119
68119
78020
88020
98020
107921
117921
127921
137921
147822
157822
167921
177921
188020
198020
208119
218218
228218
238317
248416
258416
268416
278416
288317
298317
308317

Chance of precipitation in September

Any precipitation

Carlsbad gets around 1.6 in of rain over 5.2 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 18% and peaks near 20% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
119
219
320
420
520
620
720
820
920
1020
1120
1220
1320
1420
1519
1619
1719
1818
1918
2017
2117
2216
2316
2415
2515
2614
2714
2814
2914
3014

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 53% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14229227
24228227
34328227
44328236
54328236
64328236
74328245
84328245
94328245
104328255
114328254
124427254
134427254
144626244
154725244
164825234
175024224
185123224
195422204
205621194
215920183
226119173
236219163
246418153
256617143
266717133
276916123
287116112
297216102
30731692

Wind in September

Winds average 8 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117light breeze
127light breeze
137light breeze
147light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over September. Sunrise moves from 5:36 AM to 5:55 AM, and sunset from 6:18 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:366:18
212.75:366:16
312.65:376:15
412.65:386:14
512.65:386:12
612.55:396:11
712.55:406:10
812.55:406:08
912.45:416:07
1012.45:416:05
1112.45:426:04
1212.35:436:03
1312.35:436:01
1412.35:446:00
1512.25:455:59
1612.25:455:57
1712.25:465:56
1812.15:475:54
1912.15:475:53
2012.15:485:52
2112.05:495:50
2212.05:495:49
2312.05:505:47
2411.95:515:46
2511.95:515:45
2611.95:525:43
2711.85:535:42
2811.85:535:40
2911.85:545:39
3011.75:555:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.82 kWh/m².

For context, solar energy here swings from a low near 3.29 kWh/m² to a high of 7.86 kWh/m² in June across the year — September's 5.82 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.2Intense
46.2Intense
56.1Intense
66.1Intense
76.0Intense
86.0Intense
96.0Bright
105.9Bright
115.9Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.4Bright
Planning a trip in September

Is September a good time to visit Carlsbad?

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

5.7
Sightseeing
6th-best month of the year
7.9
Beach & pool
3rd-best month of the year

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

What to pack for Carlsbad in September

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

In September, Carlsbad sees daytime highs around 87°F and nights near 64°F. Pack light clothes. Worth having: sun protection. About 5 days see rain.

light clothessun protection

UV index in Carlsbad in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Carlsbad peaks around June 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 12Dec 19UV 3
UV index (midday)Level
Jan4Moderate
Feb5High
Mar7Very high
Apr10Extreme
May10Extreme
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep10Very high
Oct7High
Nov5Moderate
Dec3Moderate

Air quality in Carlsbad in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Carlsbad is worst in July — around 16 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (October, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateJul 1016 µg/m³Oct 179 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar13Moderate
Apr14Moderate
May14Moderate
Jun15Moderate
Jul16Moderate
Aug12Moderate
Sep11Good
Oct9Good
Nov11Good
Dec13Moderate
Location & terrain

Where is Carlsbad?

Carlsbad sits at 32.4°N, 104.2°W, 3,100 ft above sea level, in United States. The nearest listed city is Hobbs, 66 mi away.

Topography around Carlsbad

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

Within 2 miles, the terrain around Carlsbad has only modest variations in elevation — a maximum elevation change of 144 ft around an average of 3,123 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 991 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,561 ft.

The land around Carlsbad is covered by artificial surfaces (39%) and shrubs (25%) within 2 miles, grassland (58%) and shrubs (24%) within 10 miles, and grassland (68%) and shrubs (21%) within 50 miles.

2 miles
144 ft
10 miles
991 ft
50 miles
5,561 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Hobbs 66 mi · Roswell 70 mi · Alamogordo 106 mi · West Odessa 109 mi · Odessa 116 mi · Horizon City 126 mi · Midland 129 mi · Socorro Mission Number 1 Colonia 132 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 Carlsbad (32.4207°, -104.2288°, elevation 3,100 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).