Rioverde weather in September

In September, Rioverde sees average daytime highs of 28°C and overnight lows near 18°C, with 136 mm of rain across 18.4 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 25% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Rioverde's 12th-clearest and 9th-windiest month. For the whole year in context, see Rioverde's year-round climate.

Daytime high
28°
6th warmest
Overnight low
18°
8th coldest
Rainfall
136 mm
18.4 wet days
Daylight
12 h 06 min
6:31 AM – 6:38 PM
Cloud cover
63%
12th clearest
Wind
6 km/h
9th windiest
Solar energy
5.09 kWh/m²
Travel score
5.1
out of 10

Rioverde is municipal seat of Rioverde, State of San Luis Potosí, Mexico.

Density
17/km²
people per km²
Founded
1617

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 28°C through the month.

A typical September day in Rioverde reaches about 28°C in the afternoon and slips back to 18°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 31°C. Set against its neighbours, September runs about 2°C cooler than August and about 2°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12819
22819
32819
42819
52819
62819
72819
82819
92819
102819
112819
122819
132819
142819
152819
162819
172719
182718
192718
202718
212718
222718
232718
242718
252718
262718
272718
282718
292718
302717

Rioverde weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 10°194.410.87.6
Feb24° / 12°194.511.27.9
Mar27° / 14°265.611.87.3
Apr30° / 17°346.712.55.6
May31° / 19°4410.6134.6
Jun30° / 20°8614.913.34.4
Jul29° / 19°10314.313.24.9
Aug29° / 19°8615.112.84.8
Sep28° / 18°13618.412.15.1
Oct26° / 16°7510.811.56.7
Nov24° / 13°295.8117.8
Dec22° / 11°133.510.77.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
24951
34852
44852
54852
64753
74753
84753
94654
104654
114654
124654
134753
144753
154654
164654
174654
184555
194555
204456
214555
224555
234456
244555
254555
264654
274654
284753
294852
304852

Chance of precipitation in September

Any precipitation

Rioverde gets around 136 mm of rain over 18.4 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 60% and peaks near 67% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
163
264
364
465
566
666
766
867
966
1066
1166
1265
1365
1464
1564
1663
1762
1861
1960
2059
2158
2256
2355
2454
2552
2651
2750
2849
2948
3047

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 37% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1026038
2025939
3025840
4025741
5025741
6025642
7025642
8025642
9035542
10035542
11035542
12035542
13045442
14045442
15055441
16065341
17075340
18075439
19185338
201105138
212115136
222125135
233135034
244145032
254155031
265165029
276175028
286175126
297185025
307195024

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 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 36 minutes over September. Sunrise moves from 6:26 AM to 6:35 AM, and sunset from 6:53 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:266:53
212.46:276:52
312.46:276:51
412.46:276:50
512.46:286:49
612.36:286:48
712.36:286:47
812.36:286:46
912.36:296:45
1012.36:296:44
1112.26:296:43
1212.26:296:42
1312.26:306:41
1412.26:306:40
1512.16:306:39
1612.16:316:38
1712.16:316:37
1812.16:316:36
1912.16:316:35
2012.06:326:34
2112.06:326:33
2212.06:326:32
2312.06:336:31
2412.06:336:30
2511.96:336:29
2611.96:336:28
2711.96:346:27
2811.96:346:26
2911.86:346:25
3011.86:356:24

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.09 kWh/m².

For context, solar energy here swings from a low near 3.84 kWh/m² to a high of 6.62 kWh/m² in May across the year — September's 5.09 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.5Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.2Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.8Bright
Planning a trip in September

Hazard calendar for Rioverde

In seasonPeak

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

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

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

Is September a good time to visit Rioverde?

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

5.1
Sightseeing
8th-best month of the year
5.5
Beach & pool
11th-best month of the year

September is a reasonable time to visit Rioverde for sightseeing.

What to pack for Rioverde in September

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

In September, Rioverde sees daytime highs around 28°C and nights near 18°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

UV index in Rioverde in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Rioverde peaks around June 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighJun 16UV 13Dec 16UV 6
UV index (midday)Level
Jan7High
Feb9Very high
Mar12Extreme
Apr12Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov7High
Dec6High

Air quality in Rioverde 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 Rioverde is worst in May — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1525 µg/m³Oct 1914 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb16Moderate
Mar16Moderate
Apr20Moderate
May26Moderate
Jun18Moderate
Jul18Moderate
Aug16Moderate
Sep15Moderate
Oct14Moderate
Nov14Moderate
Dec17Moderate
Location & terrain

Where is Rioverde?

Rioverde sits at 21.9°N, 100.0°W, 995 m above sea level, in Mexico. The nearest listed city is Ciudad Fernández, 2.0 km away.

Topography around Rioverde

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

Within 3 km, the terrain around Rioverde has only modest variations in elevation — a maximum elevation change of 37 m around an average of 992 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 791 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,455 m.

The land around Rioverde is covered by artificial surfaces (36%) and shrubs (23%) within 3 km, shrubs (61%) within 16 km, and shrubs (59%) and trees (31%) within 80 km.

3 km
37 m
16 km
791 m
80 km
2,455 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Ciudad Fernández 2.0 km · Cárdenas 37 km · San Luis de la Paz 89 km · Soledad de Graciano Sánchez 101 km · Ciudad Valles 102 km · San Luis Potosí 104 km · San José Iturbide 111 km · Tamuín 126 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 Rioverde (21.9311°, -99.9949°, elevation 995 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).