Everything below is collected in one spot so you do not have to cross-check Cancun climate: monthly averages by hand. The gap between Jan and Aug is 4.5 C here: 23.9 C against 28.4 C. No month dominates: the wettest is Oct at 7.22 mm/day, the driest Mar at 1.22 mm/day. Taken together that is roughly 1,247 mm of rain a year for the grid cell. The same build that regenerates the sitemap refreshes these values, and unchanged pages are left untouched. The table underneath carries the per-month breakdown; the related pages cover the same dataset nearby.
Annual mean temperature 26.5 C
Warmest month Aug (28.4 C)
Coldest month Jan (23.9 C)
Wettest month Oct (7.22 mm/day)
All-time record high 34.0 C
All-time record low 16.3 C
Annual precipitation 1,248 mm / year
Coordinates 21.17429, -86.84656
Population 888,797
Average monthly temperature and rainfall in Cancun
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
23.9
2.02
31.2
17.1
Feb
24.6
1.80
30.9
17.4
Mar
25.3
1.22
32.8
16.3
Apr
26.6
1.36
32.5
17.9
May
27.6
2.98
32.7
20.4
Jun
27.8
6.02
33.2
24.2
Jul
28.1
2.87
32.8
25.0
Aug
28.4
3.69
34.0
25.3
Sep
28.0
5.52
33.5
24.0
Oct
27.0
7.22
31.7
20.8
Nov
25.4
4.14
30.6
18.4
Dec
24.7
2.18
30.4
17.7
What the Cancun climate table shows
Values are multi-decadal climatological averages for the 21.17429, -86.84656 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
Is Cancun climate data a forecast?
No. These are multi-decadal averages for the grid cell, not a prediction for any particular year.
Why do the numbers differ from a weather app?
An app shows one location on one day. These are long-run averages, so they smooth out single hot or cold spells.