San Fernando weather in August

In August, San Fernando sees average daytime highs of 35°C and overnight lows near 25°C, with 57 mm of rain across 9.5 wet days and about 12.9 hours of daylight. It is the 1st-warmest and 5th-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 49% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 12 min at the start of August to 12 h 30 min by month's end. Set against the rest of the year, August is San Fernando's 4th-clearest and 9th-windiest month. For the whole year in context, see San Fernando's year-round climate.

Daytime high
35°
1st warmest
Overnight low
25°
12th coldest
Rainfall
57 mm
9.5 wet days
Daylight
12 h 54 min
6:10 AM – 7:03 PM
Cloud cover
46%
4th clearest
Wind
14 km/h
9th windiest
Solar energy
6.52 kWh/m²
Travel score
2.4
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 August

Average highAverage lowShaded bands: 10–90% of days

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

A typical August day in San Fernando reaches about 35°C in the afternoon and slips back to 25°C overnight — a 11°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, August runs on par with July and about 3°C warmer than September.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13625
23625
33625
43625
53625
63625
73625
83625
93625
103625
113625
123625
133625
143625
153625
163625
173625
183525
193525
203525
213525
223525
233525
243525
253525
263525
273525
283525
293524
303524
313424

How August really feels in San Fernando

Once humidity and wind are folded in, August 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 August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

San Fernando weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 5th-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17525
27525
37525
47525
57525
67525
77426
87327
97327
107327
117327
127228
137228
147129
157129
167030
176931
186832
196832
206832
216832
226733
236634
246634
256436
266337
276238
286040
296040
305941
315842

Chance of precipitation in August

Any precipitation

San Fernando gets around 57 mm of rain over 9.5 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 31% and peaks near 46% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
122
223
323
424
524
625
725
826
927
1027
1127
1228
1328
1429
1529
1630
1731
1831
1932
2032
2133
2234
2335
2436
2538
2639
2740
2842
2943
3044
3146

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 81% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1018415
2018415
3018316
4018316
5028216
6028216
7028216
8028216
9028216
10028216
11028216
12028216
13028216
14028216
15028216
16028216
17038215
18038215
19038215
20038215
21038215
22038116
23038116
24038017
25038017
26037918
27037819
28037819
29137620
30147520
31147421

Wind in August

Winds average 14 km/h in August.

Across August, daily wind ranges from about 12 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2712light breeze
2812light breeze
2912light breeze
3012calm
3112calm

Sunrise & sunset in August

DaylightNight

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

Days shrink by about 42 minutes over August. Sunrise moves from 6:04 AM to 6:17 AM, and sunset from 7:14 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:047:14
213.26:047:13
313.16:057:13
413.16:057:12
513.16:057:11
613.16:067:11
713.16:067:10
813.06:077:09
913.06:077:08
1013.06:087:08
1113.06:087:07
1213.06:097:06
1312.96:097:05
1412.96:107:05
1512.96:107:04
1612.96:107:03
1712.96:117:02
1812.86:117:01
1912.86:127:00
2012.86:126:59
2112.86:136:58
2212.76:136:58
2312.76:136:57
2412.76:146:56
2512.76:146:55
2612.76:156:54
2712.66:156:53
2812.66:156:52
2912.66:166:51
3012.66:166:50
3112.56:176:49

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.52 kWh/m².

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 — August's 6.52 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.8Intense
36.8Intense
46.8Intense
56.8Intense
66.8Intense
76.8Intense
86.8Intense
96.7Intense
106.7Intense
116.7Intense
126.7Intense
136.6Intense
146.6Intense
156.6Intense
166.5Intense
176.5Intense
186.5Intense
196.4Intense
206.4Intense
216.3Intense
226.3Intense
236.3Intense
246.2Intense
256.2Intense
266.1Intense
276.1Intense
286.0Intense
296.0Bright
305.9Bright
315.9Bright
Planning a trip in August

Hazard calendar for San Fernando

In seasonPeak

In August, 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 August a good time to visit San Fernando?

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

2.4
Sightseeing
12th-best month of the year
5.3
Beach & pool
12th-best month of the year

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

What to pack for San Fernando in August

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

In August, San Fernando sees daytime highs around 35°C and nights near 25°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

Sea temperature near San Fernando in August

The nearest coast averages about 29°C in August — 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 August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August 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
August 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).