Empalme weather in September

In September, Empalme sees average daytime highs of 35°C and overnight lows near 27°C, with 59 mm of rain across 6.4 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 75% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Empalme's 5th-clearest and 8th-windiest month. For the whole year in context, see Empalme's year-round climate.

Daytime high
35°
4th warmest
Overnight low
27°
10th coldest
Rainfall
59 mm
6.4 wet days
Daylight
12 h 12 min
6:13 AM – 6:23 PM
Cloud cover
26%
5th clearest
Wind
10 km/h
8th windiest
Solar energy
5.87 kWh/m²
Travel score
2.9
out of 10

Empalme is municipal seat of Empalme, State of Sonora, Mexico.

Founded
1905

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical September day in Empalme reaches about 35°C in the afternoon and slips back to 27°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 38°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13528
23528
33528
43528
53528
63527
73527
83527
93527
103527
113527
123527
133527
143527
153527
163527
173527
183527
193526
203526
213526
223526
233526
243526
253526
263526
273526
283525
293525
303525

How September really feels in Empalme

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
30 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
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.

Empalme weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 11°91.310.49.0
Feb25° / 13°131.7118.5
Mar27° / 15°60.611.88.2
Apr30° / 17°10.212.66.6
May33° / 20°10.113.44.8
Jun36° / 25°30.413.73.1
Jul36° / 28°204.613.62.2
Aug36° / 28°367.2132.2
Sep35° / 27°596.412.22.9
Oct33° / 22°192.411.34.6
Nov28° / 16°121.410.67.5
Dec24° / 12°131.710.38.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 75% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 16%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17525
27624
37624
47822
57822
67921
78020
88119
98218
108317
118416
128416
138515
148515
158515
168614
178614
188812
198812
208812
218812
228713
238812
248812
258812
268812
278911
288911
298911
308911

Chance of precipitation in September

Any precipitation

Empalme gets around 59 mm of rain over 6.4 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 22% and peaks near 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
131
231
330
430
529
629
728
827
926
1025
1125
1224
1323
1423
1522
1621
1721
1820
1919
2018
2117
2217
2316
2416
2515
2615
2714
2813
2913
3012

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 63% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100221581
200221581
300221581
400221581
501221679
601221679
701221778
801231777
901231876
1001231975
1101241974
1201242073
1301242072
1402352169
1502352268
1602362366
1702472463
1802472562
1902582659
2002592757
21026102854
22027112951
23027112951
24028123047
25029133145
260210143242
271311153239
281312163336
291313173333
301314183330

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over September. Sunrise moves from 6:05 AM to 6:20 AM, and sunset from 6:41 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:056:41
212.66:066:39
312.56:066:38
412.56:076:37
512.56:076:36
612.46:086:35
712.46:086:33
812.46:096:32
912.46:096:31
1012.36:106:30
1112.36:106:29
1212.36:116:27
1312.26:116:26
1412.26:126:25
1512.26:126:24
1612.26:136:23
1712.16:136:21
1812.16:146:20
1912.16:146:19
2012.06:156:18
2112.06:156:16
2212.06:166:15
2312.06:166:14
2411.96:176:13
2511.96:176:11
2611.96:186:10
2711.96:186:09
2811.86:196:08
2911.86:196:07
3011.86:206:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.87 kWh/m².

For context, solar energy here swings from a low near 3.9 kWh/m² to a high of 8.16 kWh/m² in May across the year — September's 5.87 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Bright
46.0Bright
56.0Bright
66.0Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.7Bright
Planning a trip in September

Hazard calendar for Empalme

In seasonPeak

In September, Empalme sits inside its pacific hurricane season. The full year is below, with each hazard's peak months called out.

Empalme sits in the eastern Pacific hurricane zone; the season peaks August–September.

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

Is September a good time to visit Empalme?

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

2.9
Sightseeing
10th-best month of the year
6.3
Beach & pool
10th-best month of the year

September is a weaker month for outdoor sightseeing in Empalme. The water and warmth also suit a beach or pool day.

What to pack for Empalme in September

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

In September, Empalme sees daytime highs around 35°C and nights near 27°C. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

Sea temperature near Empalme in September

The nearest coast averages about 30°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 30°C and coldest in January near 18°C.

It's comfortable for a long swim from Apr 6 to Dec 15 — about 8.4 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan18Cool
Feb18Cool
Mar19Cool
Apr21Refreshing
May24Refreshing
Jun27Warm
Jul29Tropical
Aug30Tropical
Sep30Tropical
Oct28Warm
Nov23Refreshing
Dec20Cool

UV index in Empalme 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 Empalme peaks around July 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighModerateJul 14UV 12Dec 19UV 4
UV index (midday)Level
Jan5Moderate
Feb6High
Mar8Very high
Apr10Extreme
May10Extreme
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep10Very high
Oct7Very high
Nov6High
Dec4Moderate

Air quality in Empalme 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 Empalme is worst in July — around 18 µg/m³ PM2.5 (moderate), about 3.9× the cleanest month (January, 5 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1917 µg/m³Jan 115 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb5Good
Mar5Good
Apr6Good
May5Good
Jun8Good
Jul18Moderate
Aug13Moderate
Sep8Good
Oct5Good
Nov5Good
Dec5Good
Location & terrain

Where is Empalme?

Empalme sits at 28.0°N, 110.8°W, 7 m above sea level, in Mexico. The nearest listed city is Heroica Guaymas, 10 km away.

Topography around Empalme

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Empalme.

Within 3 km, the terrain around Empalme has only modest variations in elevation — a maximum elevation change of 155 m around an average of 9 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 483 m; within 80 km, large variations in elevation — a maximum elevation change of 1,146 m.

The land around Empalme is covered by shrubs (31%), water (25%) and artificial surfaces (24%) within 3 km, shrubs (53%) and water (27%) within 16 km, and shrubs (55%) and water (33%) within 80 km.

3 km
155 m
16 km
483 m
80 km
1,146 m
treesshrubscroplandartificial surfacesbare terrainwater
September weather nearby: Heroica Guaymas 10 km · San Carlos 23 km · Esperanza 97 km · Ciudad Obregón 101 km · Miguel Alemán (La Doce) 117 km · Hermosillo 126 km · Navojoa 168 km · Huatabampo 171 km

Mexico travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 / 127 V · 60 Hz
Prices
≈ 54% of US
price level, 2025
GDP per capita
$13,889
2025
Happiness
7.0 / 10
World Happiness, 2025
Safe drinking water
43%
of population, 2024
Homicide rate
24.9
per 100k, 2023
Road deaths
12.8
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 440
Religion
Catholic 78%no religion 11%other Evangelical Churches 8%Jehovah Witness 1%

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 Empalme (27.9617°, -110.8141°, elevation 7 m), 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).