San Juan del Río weather in September

In September, San Juan del Río sees average daytime highs of 25°C and overnight lows near 14°C, with 98 mm of rain across 13.3 wet days and about 12.1 hours of daylight. It is the 7th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 17% of the time in September, and the air most often feels comfortable.

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 San Juan del Río's 12th-clearest and 7th-windiest month. For the whole year in context, see San Juan del Río's year-round climate.

Daytime high
25°
7th warmest
Overnight low
14°
8th coldest
Rainfall
98 mm
13.3 wet days
Daylight
12 h 06 min
6:31 AM – 6:38 PM
Cloud cover
69%
12th clearest
Wind
9 km/h
7th windiest
Solar energy
5.22 kWh/m²
Travel score
6.2
out of 10

San Juan del Río is municipal seat of San Juan del Río, State of Querétaro, Mexico.

Density
173/km²
people per km²
Founded
1531

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 25°C through the month.

A typical September day in San Juan del Río reaches about 25°C in the afternoon and slips back to 14°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 28°C. Set against its neighbours, September runs about 1°C cooler than August and on par with October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12515
22515
32515
42515
52515
62515
72515
82515
92515
102515
112515
122514
132514
142514
152514
162514
172514
182514
192514
202414
212414
222414
232414
242414
252414
262414
272414
282414
292414
302413

San Juan del Río weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 132.710.98.1
Feb25° / 142.511.38.4
Mar27° / 10°13311.97.9
Apr29° / 13°214.512.56.4
May29° / 14°388135.9
Jun27° / 15°9012.413.26.0
Jul26° / 15°9313.713.16.1
Aug26° / 15°8212.112.76.2
Sep25° / 14°9813.312.16.2
Oct24° / 12°43711.57.5
Nov24° / 10°163.1118.4
Dec23° / 51.310.88.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 67%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13268
23268
33169
43169
53169
63268
73268
83268
93268
103367
113466
123466
133367
143466
153466
163367
173367
183466
193466
203466
213367
223466
233367
243466
253466
263565
273565
283664
293664
303565

Chance of precipitation in September

Any precipitation

San Juan del Río gets around 98 mm of rain over 13.3 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 43% and peaks near 48% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
145
245
346
446
547
647
747
848
948
1048
1147
1247
1347
1446
1546
1645
1745
1844
1943
2042
2141
2240
2339
2438
2537
2635
2734
2833
2933
3032

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 57% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
137621
237621
337621
436622
536622
636622
736613
835623
935623
1035614
1135614
1235614
1335614
1435605
1535605
1635605
1736595
1836595
1937585
2038575
2139574
2241554
2342544
2444524
2546504
2648483
2750473
2852453
2953443
3054433

Wind in September

Winds average 9 km/h in September.

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

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 6:27 AM to 6:34 AM, and sunset from 6:52 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:276:52
212.46:286:51
312.46:286:50
412.46:286:49
512.36:286:48
612.36:296:47
712.36:296:46
812.36:296:45
912.36:296:45
1012.26:306:44
1112.26:306:43
1212.26:306:42
1312.26:306:41
1412.26:306:40
1512.16:316:39
1612.16:316:38
1712.16:316:37
1812.16:316:36
1912.16:326:35
2012.06:326:34
2112.06:326:33
2212.06:326:32
2312.06:326:31
2412.06:336:30
2511.96:336:29
2611.96:336:28
2711.96:336:27
2811.96:346:26
2911.96:346:25
3011.86:346:24

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.22 kWh/m².

For context, solar energy here swings from a low near 4.76 kWh/m² to a high of 7.28 kWh/m² in April across the year — September's 5.22 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in September

Hazard calendar for San Juan del Río

In seasonPeak

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

San Juan del Río's rainy season runs June–September, 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 San Juan del Río?

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

6.2
Sightseeing
8th-best month of the year
5.5
Beach & pool
12th-best month of the year

September is a reasonable time to visit San Juan del Río for sightseeing.

What to pack for San Juan del Río in September

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

In September, San Juan del Río sees daytime highs around 25°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in San Juan del Río in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (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 Juan del Río peaks around June 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highJun 13UV 14Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb10Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun14Extreme
Jul12Extreme
Aug14Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec7Very high

Air quality in San Juan del Río 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 San Juan del Río is worst in December — around 46 µg/m³ PM2.5 (poor), about 1.6× the cleanest month (October, 29 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorModeratePoorDec 2146 µg/m³Oct 1129 µg/m³
PM2.5 (µg/m³)Level
Jan44Poor
Feb42Poor
Mar38Poor
Apr35Poor
May35Moderate
Jun30Moderate
Jul40Poor
Aug32Moderate
Sep30Moderate
Oct29Moderate
Nov37Poor
Dec46Poor
Location & terrain

Where is San Juan del Río?

San Juan del Río sits at 20.4°N, 100.0°W, 1,923 m above sea level, in Mexico. The nearest listed city is Tequisquiapan, 18 km away.

Topography around San Juan del Río

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

Within 3 km, the terrain around San Juan del Río has only modest variations in elevation — a maximum elevation change of 226 m around an average of 1,943 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 797 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,942 m.

The land around San Juan del Río is covered by artificial surfaces (54%) within 3 km, shrubs (40%) and cropland (32%) within 16 km, and shrubs (42%) and cropland (23%) within 80 km.

3 km
226 m
16 km
797 m
80 km
2,942 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Tequisquiapan 18 km · Venceremos 46 km · Santiago de Querétaro 46 km · San José de los Olvera 47 km · El Pueblito 49 km · Santa Rosa Jáuregui 61 km · Apaseo el Alto 66 km · Atlacomulco de Fabela 67 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 Juan del Río (20.389°, -99.9964°, elevation 1,923 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).