Everything below is collected in one spot so you do not have to cross-check Arusha climate: monthly averages by hand. The gap between Jul and Feb is 4.9 C here: 19.1 C against 24.0 C. No month dominates: the wettest is Apr at 4.90 mm/day, the driest Jul at 0.28 mm/day. Taken together that is roughly 870 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. Exact monthly values are in the table; links below cover adjacent locations and years.
Annual mean temperature 21.8 C
Warmest month Feb (24.0 C)
Coldest month Jul (19.1 C)
Wettest month Apr (4.90 mm/day)
All-time record high 38.2 C
All-time record low 7.8 C
Annual precipitation 869 mm / year
Coordinates -3.3667, 36.6833
Population 617,631
Average monthly temperature and rainfall in Arusha
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
23.6
2.83
37.2
11.0
Feb
24.0
2.59
38.2
13.4
Mar
23.4
3.38
36.6
14.8
Apr
21.9
4.90
34.8
15.0
May
20.3
2.90
31.8
12.2
Jun
19.2
0.60
31.2
9.8
Jul
19.1
0.28
31.5
7.8
Aug
20.1
0.44
32.2
10.3
Sep
21.7
0.57
33.4
11.0
Oct
22.6
2.13
34.2
13.1
Nov
22.8
4.44
34.0
13.9
Dec
23.2
3.55
36.2
14.8
What the Arusha climate table shows
Values are multi-decadal climatological averages for the -3.3667, 36.6833 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
Is Arusha climate data a forecast?
No. These are multi-decadal averages for the grid cell, not a prediction for any particular year.
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.