Ruiru climate: monthly averages: annual mean temperature 18.8 C; warmest month Mar (20.3 C); coldest month Jul (17.3 C).
Annual mean temperature: 18.8 C
Warmest month: Mar (20.3 C)
Coldest month: Jul (17.3 C)
Wettest month: Apr (5.11 mm/day)
All-time record high: 33.9 C
All-time record low: 6.9 C
This page is a single place to check Ruiru climate: monthly averages. Ruiru runs from 17.3 C in Jul to 20.3 C in Mar, a swing of 3.0 C. Rain is strongly seasonal: Apr is the wettest month at 5.11 mm/day, while Jul runs at 0.81 mm/day, about 6.3x drier. Taken together that is roughly 787 mm of rain a year for the grid cell. Every run re-reads the source and only rewrites this page when a figure actually changed. Use the table for exact numbers, or the related pages below for neighbouring locations and periods.
Annual mean temperature 18.8 C
Warmest month Mar (20.3 C)
Coldest month Jul (17.3 C)
Wettest month Apr (5.11 mm/day)
All-time record high 33.9 C
All-time record low 6.9 C
Annual precipitation 788 mm / year
Coordinates -1.14665, 36.96087
Population 490,120
Average monthly temperature and rainfall in Ruiru
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
19.0
1.40
31.1
6.9
Feb
19.9
1.07
33.9
9.2
Mar
20.3
2.44
32.5
10.1
Apr
19.5
5.11
31.7
11.5
May
18.3
2.82
28.9
9.9
Jun
17.5
1.15
28.2
8.5
Jul
17.3
0.81
28.6
8.2
Aug
17.9
1.02
29.4
8.5
Sep
19.1
0.94
31.1
9.6
Oct
19.6
2.47
31.3
11.0
Nov
18.8
4.09
29.2
10.7
Dec
18.5
2.57
29.9
9.3
What the Ruiru climate table shows
Values are multi-decadal climatological averages for the -1.14665, 36.96087 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 Ruiru get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.