San Fernando weather in July

In July, San Fernando sees average daytime highs of 35°C and overnight lows near 25°C, with 69 mm of rain across 8.8 wet days and about 13.4 hours of daylight. It is the 2nd-warmest and 2nd-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 55% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 13 h 30 min at the start of July to 13 h 12 min by month's end. Set against the rest of the year, July is San Fernando's 2nd-clearest and 1st-windiest month. For the whole year in context, see San Fernando's year-round climate.

Daytime high
35°
2nd warmest
Overnight low
25°
12th coldest
Rainfall
69 mm
8.8 wet days
Daylight
13 h 24 min
5:56 AM – 7:20 PM
Cloud cover
44%
2nd clearest
Wind
16 km/h
1st windiest
Solar energy
6.8 kWh/m²
Travel score
2.6
out of 10

San Fernando is municipal seat of San Fernando, State of Tamaulipas, Mexico.

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

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

A typical July day in San Fernando reaches about 35°C in the afternoon and slips back to 25°C overnight — a 10°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, July runs on par with June and on par with August.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13525
23525
33525
43525
53525
63525
73525
83525
93525
103525
113525
123525
133525
143525
153525
163525
173525
183525
193525
203525
213525
223625
233625
243625
253625
263625
273625
283625
293625
303625
313625

How July really feels in San Fernando

Once humidity and wind are folded in, July averages 31 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
31
31 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

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

San Fernando weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 12°254.410.67.7
Feb25° / 14°203.911.17.8
Mar28° / 17°324.911.86.8
Apr31° / 20°455.212.65.1
May33° / 23°496.513.23.8
Jun35° / 25°639.913.52.8
Jul35° / 25°698.813.42.6
Aug35° / 25°579.512.92.4
Sep33° / 23°11914.512.23.3
Oct30° / 20°678.211.45.4
Nov26° / 16°355.310.87.5
Dec23° / 13°244.110.57.9

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 15% of July, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26634
36733
46733
56733
66733
76832
86832
96832
106931
116931
127030
137030
147030
157129
167129
177228
187228
197228
207228
217327
227327
237327
247327
257426
267426
277426
287426
297525
307525
317525

Chance of precipitation in July

Any precipitation

San Fernando gets around 69 mm of rain over 8.8 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 40% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
239
338
437
536
635
734
833
932
1031
1130
1230
1329
1428
1528
1627
1727
1827
1926
2026
2126
2225
2325
2424
2524
2623
2723
2822
2922
3022
3122

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the oppressive band about 83% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
137621
237720
337819
428018
528117
628216
728315
828414
928513
1028513
1128612
1228612
1328612
1428612
1528612
1628612
1728513
1838413
1938413
2038314
2138314
2238215
2328315
2428315
2528315
2628216
2728216
2828216
2928315
3028315
3128315

Wind in July

Winds average 16 km/h in July, the windiest month of the year.

Across July, daily wind ranges from about 16 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 13 h 30 min at the start of July to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over July. Sunrise moves from 5:50 AM to 6:03 AM, and sunset from 7:22 PM to 7:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:507:22
213.55:507:22
313.55:517:22
413.55:517:22
513.55:527:22
613.55:527:22
713.55:527:22
813.55:537:22
913.55:537:22
1013.55:537:21
1113.55:547:21
1213.45:547:21
1313.45:557:21
1413.45:557:21
1513.45:567:21
1613.45:567:20
1713.45:577:20
1813.45:577:20
1913.45:577:20
2013.45:587:19
2113.35:587:19
2213.35:597:19
2313.35:597:18
2413.36:007:18
2513.36:007:17
2613.36:017:17
2713.36:017:16
2813.26:027:16
2913.26:027:15
3013.26:037:15
3113.26:037:14

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.8 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.35 kWh/m² to a high of 6.8 kWh/m² in July across the year — July's 6.8 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.6Intense
56.6Intense
66.6Intense
76.7Intense
86.7Intense
96.7Intense
106.7Intense
116.8Intense
126.8Intense
136.8Intense
146.8Intense
156.8Intense
166.8Intense
176.9Intense
186.9Intense
196.9Intense
206.9Intense
216.9Intense
226.9Intense
236.9Intense
246.9Intense
256.9Intense
266.9Intense
276.9Intense
286.9Intense
296.9Intense
306.9Intense
316.9Intense
Planning a trip in July

Hazard calendar for San Fernando

In seasonPeak

In July, San Fernando sits inside its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.

San Fernando sits in the Atlantic hurricane belt; the season peaks August–October.

San Fernando's rainy season runs June–October, when most of the year's rain falls.

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

Is July a good time to visit San Fernando?

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

2.6
Sightseeing
11th-best month of the year
5.6
Beach & pool
11th-best month of the year

July is a weaker month for outdoor sightseeing in San Fernando.

What to pack for San Fernando in July

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

In July, San Fernando sees daytime highs around 35°C and nights near 25°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

Sea temperature near San Fernando in July

The nearest coast averages about 28°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 58 km away) is warmest in September at about 29°C and coldest in February near 20°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb20Refreshing
Mar21Refreshing
Apr23Refreshing
May26Warm
Jun28Warm
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct28Warm
Nov25Warm
Dec22Refreshing

UV index in San Fernando in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Fernando peaks around April 17 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highExtremeVery highHighApr 17UV 11Jan 10UV 5
UV index (midday)Level
Jan5High
Feb7High
Mar8Very high
Apr12Extreme
May9Very high
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep9Very high
Oct9Very high
Nov6High
Dec5High

Air quality in San Fernando in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in San Fernando is worst in August — around 34 µg/m³ PM2.5 (moderate), about 5.6× the cleanest month (January, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 934 µg/m³Nov 186 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb8Good
Mar11Good
Apr14Moderate
May23Moderate
Jun28Moderate
Jul34Moderate
Aug34Moderate
Sep17Moderate
Oct7Good
Nov6Good
Dec6Good
Location & terrain

Where is San Fernando?

San Fernando sits at 24.8°N, 98.1°W, 44 m above sea level, in Mexico. The nearest listed city is Valle Hermoso, 98 km away.

Topography around San Fernando

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

Within 3 km, the terrain around San Fernando has only modest variations in elevation — a maximum elevation change of 64 m around an average of 45 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 135 m; within 80 km, large variations in elevation — a maximum elevation change of 1,049 m.

The land around San Fernando is covered by trees (37%), artificial surfaces (29%) and shrubs (21%) within 3 km, cropland (35%), trees (30%) and shrubs (22%) within 16 km, and shrubs (30%) and cropland (21%) within 80 km.

3 km
64 m
16 km
135 m
80 km
1,049 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
July weather nearby: Valle Hermoso 98 km · Ciudad Río Bravo 127 km · Heroica Matamoros 132 km · Brownsville 134 km · Reynosa 138 km · Linares 143 km · Mercedes 147 km · Weslaco 147 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 San Fernando (24.8471°, -98.1488°, elevation 44 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).