Reynosa weather in September

In September, Reynosa sees average daytime highs of 34°C and overnight lows near 24°C, with 89 mm of rain across 12.2 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 35°C in the first days to 33°C by the end. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Reynosa's 9th-clearest and 12th-windiest month. For the whole year in context, see Reynosa's year-round climate.

Daytime high
34°
4th warmest
Overnight low
24°
9th coldest
Rainfall
89 mm
12.2 wet days
Daylight
12 h 12 min
6:23 AM – 6:32 PM
Cloud cover
52%
9th clearest
Wind
13 km/h
12th windiest
Solar energy
5.29 kWh/m²
Travel score
3.1
out of 10

Reynosa is municipal seat of Reynosa, State of Tamaulipas, Mexico.

Founded
1749

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 35°C in the first days to 33°C by the end.

A typical September day in Reynosa reaches about 34°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 37°C. Set against its neighbours, September runs about 3°C cooler than August and about 3°C warmer than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13525
23525
33525
43525
53525
63425
73424
83424
93424
103424
113424
123424
133424
143424
153424
163324
173324
183324
193323
203323
213323
223323
233323
243323
253323
263323
273322
283322
293222
303222

How September really feels in Reynosa

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
9 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.

Reynosa 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
Jan22° / 12°264.410.67.6
Feb25° / 14°244.311.17.8
Mar28° / 17°365.511.86.8
Apr31° / 20°455.612.65.1
May33° / 23°496.613.33.6
Jun35° / 25°526.813.62.5
Jul36° / 25°546.113.52.2
Aug36° / 25°396.712.92.0
Sep34° / 24°8912.212.23.1
Oct31° / 20°60711.45.2
Nov26° / 16°365.310.77.5
Dec23° / 12°30510.47.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25743
35743
45545
55545
65545
75545
85545
95545
105545
115545
125545
135644
145644
155743
165743
175743
185842
196040
206040
216139
226238
236337
246436
256535
266733
276733
286832
296832
306832

Chance of precipitation in September

Any precipitation

Reynosa gets around 89 mm of rain over 12.2 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 39% and peaks near 47% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
139
241
342
444
545
646
747
847
947
1047
1147
1246
1345
1445
1544
1642
1741
1840
1939
2037
2136
2235
2333
2432
2531
2630
2730
2829
2929
3028

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 89% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101287316
201287217
301287217
401287217
501387018
601387018
701387018
801386919
901386919
1001486819
1101486720
1202486620
1302596420
1402596420
1502696320
16026106220
17127106119
18137115919
19138125818
20139135717
21149145616
222410155415
232511165115
242511175114
252512184913
263612194812
273613204711
283613214610
293713224510
30471422449

Wind in September

Winds average 13 km/h in September, the calmest month.

Across September, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 30 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 42 minutes over September. Sunrise moves from 6:17 AM to 6:29 AM, and sunset from 6:49 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:176:49
212.56:176:48
312.56:186:47
412.56:186:46
512.46:186:45
612.46:196:43
712.46:196:42
812.46:206:41
912.36:206:40
1012.36:206:39
1112.36:216:38
1212.36:216:37
1312.26:226:35
1412.26:226:34
1512.26:236:33
1612.26:236:32
1712.16:236:31
1812.16:246:30
1912.16:246:29
2012.06:256:27
2112.06:256:26
2212.06:256:25
2312.06:266:24
2411.96:266:23
2511.96:276:22
2611.96:276:20
2711.96:286:19
2811.86:286:18
2911.86:296:17
3011.86:296:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.29 kWh/m².

For context, solar energy here swings from a low near 3.1 kWh/m² to a high of 6.79 kWh/m² in July across the year — September's 5.29 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.6Bright
55.6Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.4Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in September

Is September a good time to visit Reynosa?

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

3.1
Sightseeing
9th-best month of the year
5.9
Beach & pool
7th-best month of the year

September is a weaker month for outdoor sightseeing in Reynosa.

What to pack for Reynosa in September

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

In September, Reynosa sees daytime highs around 34°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in Reynosa 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 Reynosa peaks around June 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeExtremeVery highHighJun 21UV 12Dec 22UV 5
UV index (midday)Level
Jan5Moderate
Feb7Very high
Mar8Very high
Apr11Extreme
May9Very high
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep10Very high
Oct8Very high
Nov6High
Dec5Moderate

Air quality in Reynosa 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 Reynosa is worst in July — around 26 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1625 µg/m³Nov 107 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr13Moderate
May20Moderate
Jun21Moderate
Jul26Moderate
Aug19Moderate
Sep12Moderate
Oct8Good
Nov7Good
Dec9Good
Location & terrain

Where is Reynosa?

Reynosa sits at 26.1°N, 98.3°W, 38 m above sea level, in Mexico. The nearest listed city is McAllen, 15 km away.

Topography around Reynosa

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

Within 3 km, the terrain around Reynosa has only modest variations in elevation — a maximum elevation change of 34 m around an average of 37 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 85 m; within 80 km, significant variations in elevation — a maximum elevation change of 310 m.

The land around Reynosa is covered by artificial surfaces (69%) and trees (22%) within 3 km, trees (28%), cropland (25%) and artificial surfaces (24%) within 16 km, and cropland (39%) and shrubs (21%) within 80 km.

3 km
34 m
16 km
85 m
80 km
310 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: McAllen 15 km · Mission 16 km · Pharr 16 km · San Juan 18 km · Alamo 20 km · Ciudad Río Bravo 22 km · Alton 23 km · Donna 25 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 Reynosa (26.08°, -98.2846°, elevation 38 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. 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).