This page is a single place to check Cotonou climate: monthly averages. Cotonou runs from 24.7 C in Aug to 27.8 C in Mar, a swing of 3.1 C. Rain is spread through the year, with Jun the wettest month at 7.19 mm/day and Dec the driest at 0.65 mm/day. Taken together that is roughly 1,339 mm of rain a year for the grid cell. The build runs on a schedule and caches the last good response, so the numbers stay put even when the upstream API is having a bad day. Scroll for the month-by-month figures, or jump to a neighbouring location from the links below.
Annual mean temperature 26.4 C
Warmest month Mar (27.8 C)
Coldest month Aug (24.7 C)
Wettest month Jun (7.19 mm/day)
All-time record high 34.0 C
All-time record low 15.2 C
Annual precipitation 1,340 mm / year
Coordinates 6.3654, 2.4183
Population 679,012
Average monthly temperature and rainfall in Cotonou
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
26.5
0.66
33.2
15.2
Feb
27.5
1.15
34.0
18.3
Mar
27.8
2.52
33.5
21.2
Apr
27.5
3.98
32.7
24.3
May
27.1
5.62
31.4
24.1
Jun
26.0
7.19
30.4
22.8
Jul
25.1
5.32
29.1
21.4
Aug
24.7
2.99
29.3
20.7
Sep
25.3
6.61
29.7
22.2
Oct
26.0
5.54
31.0
23.2
Nov
26.8
1.82
31.8
21.8
Dec
26.8
0.65
32.6
18.5
What the Cotonou climate table shows
Values are multi-decadal climatological averages for the 6.3654, 2.4183 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
Does Cotonou get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.