A consolidated reference for Owerri climate: monthly averages, rebuilt from public data on a schedule. Expect 24.9 C at the coldest (Jan) and 26.9 C at the warmest (Mar) — a 2.0 C spread. Expect a wet season rather than rain year-round: Sep brings 11.16 mm/day against 0.49 mm/day in Jan. Taken together that is roughly 1,835 mm of rain a year for the grid cell. Because each page is rebuilt independently, one unavailable upstream never takes the rest of the site down. Scroll for the month-by-month figures, or jump to a neighbouring location from the links below.
Annual mean temperature 25.8 C
Warmest month Mar (26.9 C)
Coldest month Jan (24.9 C)
Wettest month Sep (11.16 mm/day)
All-time record high 34.8 C
All-time record low 12.6 C
Annual precipitation 1,840 mm / year
Coordinates 5.48363, 7.03325
Population 545,000
Average monthly temperature and rainfall in Owerri
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
24.9
0.49
33.4
12.6
Feb
26.4
1.20
34.8
14.1
Mar
26.9
2.35
33.4
19.1
Apr
26.8
4.31
33.8
21.1
May
26.5
5.75
33.4
22.3
Jun
25.6
8.18
31.8
21.6
Jul
25.0
7.79
31.5
19.8
Aug
24.9
8.12
31.4
20.1
Sep
25.1
11.16
31.5
21.0
Oct
25.6
7.31
31.9
21.2
Nov
26.1
3.12
32.5
18.9
Dec
25.4
0.59
32.8
14.4
What the Owerri climate table shows
Values are multi-decadal climatological averages for the 5.48363, 7.03325 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
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.
How much rain is 11.16 mm/day in a month?
Rain is recorded as a daily mean, so 11.16 mm/day is roughly 339 mm across a 30-day month.