Cortazar weather in September

In September, Cortazar sees average daytime highs of 26°C and overnight lows near 15°C, with 116 mm of rain across 15.1 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 16% 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 Cortazar's 12th-clearest and 5th-windiest month. For the whole year in context, see Cortazar's year-round climate.

Daytime high
26°
8th warmest
Overnight low
15°
8th coldest
Rainfall
116 mm
15.1 wet days
Daylight
12 h 06 min
6:35 AM – 6:42 PM
Cloud cover
68%
12th clearest
Wind
8 km/h
5th windiest
Solar energy
5.5 kWh/m²
Travel score
5.7
out of 10

Cortazar is municipal seat of Cortazar, State of Guanajuato, Mexico.

Founded
1721

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 26°C through the month.

A typical September day in Cortazar reaches about 26°C in the afternoon and slips back to 15°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12715
22715
32715
42715
52615
62615
72615
82615
92615
102615
112615
122615
132615
142615
152615
162615
172615
182615
192615
202615
212615
222615
232615
242615
252615
262615
272615
282615
292614
302614

Cortazar weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 112.110.98.6
Feb26° / 10°13211.38.3
Mar29° / 11°111.911.97.3
Apr31° / 14°112.612.55.6
May31° / 16°447.1134.8
Jun29° / 16°13314.413.24.8
Jul27° / 15°14918.513.15.2
Aug27° / 15°12916.512.75.4
Sep26° / 15°11615.112.15.7
Oct27° / 13°427.111.57.1
Nov26° / 11°132.7118.3
Dec24° / 4110.88.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 64%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23466
33367
43367
53466
63466
73466
83565
93565
103565
113565
123664
133664
143565
153565
163664
173664
183664
193664
203664
213664
223763
233763
243763
253763
263961
273961
284060
294159
304159

Chance of precipitation in September

Any precipitation

Cortazar gets around 116 mm of rain over 15.1 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 49% and peaks near 58% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
158
258
358
458
558
658
758
858
957
1057
1156
1256
1355
1454
1553
1652
1751
1850
1948
2047
2145
2244
2342
2440
2538
2637
2736
2835
2934
3033

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 50% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1205525
2205426
3205426
4205426
5205426
6205426
7215326
8215326
9215326
10215326
11225226
12225226
13235225
14245125
15245224
16255124
17265123
18275122
19285121
20295120
21314920
22334919
23354818
24374617
25394516
26414415
27424314
28444213
29464213
30474112

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 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
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
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 6:31 AM to 6:38 AM, and sunset from 6:56 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:316:56
212.46:316:55
312.46:326:54
412.46:326:53
512.36:326:52
612.36:326:51
712.36:336:50
812.36:336:49
912.36:336:48
1012.26:336:47
1112.26:346:46
1212.26:346:46
1312.26:346:45
1412.26:346:44
1512.16:346:43
1612.16:356:42
1712.16:356:41
1812.16:356:40
1912.16:356:39
2012.06:366:38
2112.06:366:37
2212.06:366:36
2312.06:366:35
2412.06:376:34
2511.96:376:33
2611.96:376:32
2711.96:376:31
2811.96:386:30
2911.96:386:29
3011.86:386:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.5 kWh/m².

For context, solar energy here swings from a low near 4.84 kWh/m² to a high of 7.47 kWh/m² in April across the year — September's 5.5 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in September

Hazard calendar for Cortazar

In seasonPeak

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

Cortazar'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 Cortazar?

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

5.7
Sightseeing
7th-best month of the year
5.6
Beach & pool
10th-best month of the year

September is a reasonable time to visit Cortazar for sightseeing.

What to pack for Cortazar in September

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

In September, Cortazar sees daytime highs around 26°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 15 days see rain.

rain gearlight clothessun protection

UV index in Cortazar 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 Cortazar peaks around June 14 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highJun 14UV 14Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun14Extreme
Jul12Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov8Very high
Dec7Very high

Air quality in Cortazar 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 Cortazar is worst in May — around 27 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1226 µg/m³Oct 1517 µg/m³
PM2.5 (µg/m³)Level
Jan24Moderate
Feb23Moderate
Mar20Moderate
Apr24Moderate
May27Moderate
Jun18Moderate
Jul21Moderate
Aug18Moderate
Sep19Moderate
Oct17Moderate
Nov21Moderate
Dec26Moderate
Location & terrain

Where is Cortazar?

Cortazar sits at 20.5°N, 101.0°W, 1,788 m above sea level, in Mexico. The nearest listed city is Villagrán, 5.0 km away.

Topography around Cortazar

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

Within 3 km, the terrain around Cortazar has only modest variations in elevation — a maximum elevation change of 114 m around an average of 1,740 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,127 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,476 m.

The land around Cortazar is covered by cropland (42%) and artificial surfaces (28%) within 3 km, cropland (53%) within 16 km, and cropland (35%) and shrubs (27%) within 80 km.

3 km
114 m
16 km
1,127 m
80 km
1,476 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Villagrán 5.0 km · Celaya 16 km · Jaral del Progreso 16 km · Juventino Rosas 18 km · Valle de Santiago 26 km · Salamanca 26 km · Apaseo el Grande 30 km · Salvatierra 31 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 Cortazar (20.483°, -100.9635°, elevation 1,788 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).