Monthly Climate
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Best time to visit Onitsha

November is the best time to visit Onitsha for general sightseeing, with average highs of 31 °C and about 6 wet days. The comfortable season runs roughly November to February.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking November comfort 65/100
The least cloud December 50 % average cloud cover
The least rain December 5 mm
Warmth February 35 °C
Cooler weather July 28 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 November 65 31 °C 6
2 December 64 33 °C 1
3 January 62 34 °C 1
4 February 58 35 °C 3
5 August 53 28 °C 23
6 July 53 28 °C 26
7 March 51 34 °C 9
8 September 51 29 °C 27
9 June 50 29 °C 25
10 October 49 29 °C 23
11 April 47 32 °C 16
12 May 45 31 °C 23

When to think twice

May scores lowest with about 23 wet days and highs near 31 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 34.4 °C 6 mm 54 %
February 35.0 °C 14 mm 64 %
March 33.9 °C 48 mm 78 %
April 32.1 °C 98 mm 84 %
May 30.7 °C 142 mm 84 %
June 29.1 °C 186 mm 83 %
July 28.3 °C 192 mm 86 %
August 28.4 °C 181 mm 88 %
September 28.8 °C 205 mm 87 %
October 29.4 °C 155 mm 86 %
November 30.9 °C 31 mm 71 %
December 33.1 °C 5 mm 50 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.