Monthly Climate
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Best time to visit Ruiru

August is the best time to visit Ruiru for general sightseeing, with average highs of 22 °C and about 3 wet days. The comfortable season runs roughly June to October.

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 August comfort 96/100
The least cloud February 53 % average cloud cover
The least rain July 10 mm
Warmth February 27 °C
Cooler weather July 22 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 August 96 22 °C 3
2 September 96 24 °C 2
3 July 96 22 °C 2
4 June 94 22 °C 6
5 January 90 25 °C 7
6 February 89 27 °C 5
7 October 87 25 °C 10
8 December 82 24 °C 14
9 May 81 23 °C 15
10 March 79 26 °C 13
11 November 73 23 °C 22
12 April 72 24 °C 22

When to think twice

April scores lowest with about 22 wet days and highs near 24 °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 25.2 °C 33 mm 53 %
February 26.7 °C 28 mm 53 %
March 26.5 °C 64 mm 61 %
April 24.4 °C 127 mm 76 %
May 23.3 °C 79 mm 71 %
June 22.3 °C 28 mm 77 %
July 21.8 °C 10 mm 78 %
August 22.4 °C 15 mm 76 %
September 24.4 °C 12 mm 63 %
October 25.0 °C 58 mm 68 %
November 23.0 °C 131 mm 78 %
December 23.5 °C 63 mm 63 %

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.