Celaya weather in May

In May, Celaya sees average daytime highs of 31°C and overnight lows near 15°C, with 46 mm of rain across 7.6 wet days and about 13 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 47% of the time in May, and the air most often feels dry.

Daylight stretches from about 12 h 42 min at the start of May to 13 h 06 min by month's end. Set against the rest of the year, May is Celaya's 7th-clearest and 7th-windiest month. For the whole year in context, see Celaya's year-round climate.

Daytime high
31°
1st warmest
Overnight low
15°
9th coldest
Rainfall
46 mm
7.6 wet days
Daylight
13 hours
6:10 AM – 7:09 PM
Cloud cover
45%
7th clearest
Wind
8 km/h
7th windiest
Solar energy
7.35 kWh/m²
Travel score
5.1
out of 10

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

Air quality
Elevated
PM10 66 µg/m³ · 2018
Density
615/km²
people per km²
Founded
1570

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical May day in Celaya reaches about 31°C in the afternoon and slips back to 15°C overnight — a 16°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 34°C. Set against its neighbours, May runs on par with April and about 2°C warmer than June.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13114
23114
33114
43114
53114
63114
73115
83115
93115
103115
113115
123115
133115
143115
153115
163115
173115
183115
193115
203115
213115
223115
233115
243115
253115
263115
273115
283115
293116
303116
313016

Celaya weather by month

How May compares with the rest of the year at a glance. May 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
Jan24° / 102.210.98.5
Feb26° / 121.811.38.5
Mar28° / 11°10211.97.5
Apr30° / 13°122.712.55.9
May31° / 15°467.6135.1
Jun29° / 16°12613.613.25.1
Jul27° / 15°13517.213.15.5
Aug27° / 15°12215.412.75.6
Sep26° / 15°1151412.15.9
Oct26° / 13°42711.57.2
Nov25° / 10°132.7118.3
Dec24° / 4110.88.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 26% of May, with mostly cloudy or overcast conditions the remaining 27%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27030
37129
47129
57129
67129
77228
87228
97228
107327
117327
127327
137426
147426
157426
167525
177525
187525
197525
207525
217525
227525
237426
247525
257525
267327
277327
287327
297129
307129
317030

Chance of precipitation in May

Any precipitation

Celaya gets around 46 mm of rain over 7.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 31% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
114
215
316
417
518
619
720
821
922
1023
1123
1223
1324
1424
1524
1625
1725
1825
1926
2026
2126
2226
2327
2427
2527
2628
2728
2829
2929
3030
3131

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19820
29730
39730
49730
59640
69640
79550
89460
99460
109370
119370
129280
139190
149190
1590100
1690100
1789110
1887121
1986131
2085141
2185141
2284151
2382162
2481172
2581172
2680182
2778193
2877203
2976213
3073234
3172244

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 42 min at the start of May to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 6:18 AM to 6:06 AM, and sunset from 7:03 PM to 7:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:187:03
212.86:187:03
312.86:177:03
412.86:167:04
512.86:167:04
612.86:157:05
712.86:157:05
812.96:147:05
912.96:147:06
1012.96:137:06
1112.96:137:07
1212.96:127:07
1312.96:127:07
1412.96:117:08
1513.06:117:08
1613.06:107:09
1713.06:107:09
1813.06:107:09
1913.06:097:10
2013.06:097:10
2113.06:097:11
2213.06:087:11
2313.16:087:12
2413.16:087:12
2513.16:077:12
2613.16:077:13
2713.16:077:13
2813.16:077:14
2913.16:077:14
3013.16:077:15
3113.16:067:15

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.35 kWh/m².

For context, solar energy here swings from a low near 4.84 kWh/m² to a high of 7.46 kWh/m² in April across the year — May's 7.35 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.5Intense
27.5Intense
37.5Intense
47.4Intense
57.4Intense
67.4Intense
77.4Intense
87.4Intense
97.4Intense
107.4Intense
117.4Intense
127.4Intense
137.4Intense
147.4Intense
157.4Intense
167.4Intense
177.3Intense
187.3Intense
197.3Intense
207.3Intense
217.3Intense
227.3Intense
237.3Intense
247.3Intense
257.3Intense
267.2Intense
277.2Intense
287.2Intense
297.2Intense
307.1Intense
317.1Intense
Planning a trip in May

Hazard calendar for Celaya

In seasonPeak

None of Celaya's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Celaya'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 May a good time to visit Celaya?

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

5.1
Sightseeing
11th-best month of the year
7.3
Beach & pool
6th-best month of the year

May is a reasonable time to visit Celaya for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Celaya in May

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

In May, Celaya sees daytime highs around 31°C and nights near 15°C. Pack light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Celaya in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Celaya 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 Celaya in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Celaya is worst in May — around 24 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1323 µg/m³Oct 1516 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb22Moderate
Mar19Moderate
Apr22Moderate
May24Moderate
Jun18Moderate
Jul22Moderate
Aug18Moderate
Sep18Moderate
Oct16Moderate
Nov19Moderate
Dec22Moderate
Location & terrain

Where is Celaya?

Celaya sits at 20.5°N, 100.8°W, 1,766 m above sea level, in Mexico. The nearest listed city is Apaseo el Grande, 13 km away.

Topography around Celaya

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

Within 3 km, the terrain around Celaya has only modest variations in elevation — a maximum elevation change of 31 m around an average of 1,756 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 824 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,651 m.

The land around Celaya is covered by artificial surfaces (83%) within 3 km, cropland (39%) within 16 km, and cropland (34%) and shrubs (29%) within 80 km.

3 km
31 m
16 km
824 m
80 km
1,651 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Apaseo el Grande 13 km · Cortazar 16 km · Villagrán 19 km · Apaseo el Alto 21 km · Comonfort 23 km · Juventino Rosas 23 km · Jaral del Progreso 31 km · Salvatierra 35 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 Celaya (20.5218°, -100.814°, elevation 1,766 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).