Santiago de Surco climate: monthly averages: annual mean temperature 18.2 C; warmest month Mar (20.1 C); coldest month Jul (16.7 C).
Annual mean temperature: 18.2 C
Warmest month: Mar (20.1 C)
Coldest month: Jul (16.7 C)
Wettest month: Feb (0.17 mm/day)
All-time record high: 27.3 C
All-time record low: 10.2 C
This is the short version of Santiago de Surco climate: monthly averages, with the monthly detail underneath. The gap between Jul and Mar is 3.4 C here: 16.7 C against 20.1 C. Precipitation peaks in Feb (0.17 mm/day) and bottoms out in Jun (0.02 mm/day), so a 8.5x difference between the two. Taken together that is roughly 23 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. Scroll for the month-by-month figures, or jump to a neighbouring location from the links below.
Annual mean temperature 18.2 C
Warmest month Mar (20.1 C)
Coldest month Jul (16.7 C)
Wettest month Feb (0.17 mm/day)
All-time record high 27.3 C
All-time record low 10.2 C
Annual precipitation 22 mm / year
Coordinates -12.13588, -77.00742
Population 251,648
Average monthly temperature and rainfall in Santiago de Surco
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
19.4
0.09
26.5
14.5
Feb
20.0
0.17
26.8
15.5
Mar
20.1
0.14
27.3
15.3
Apr
19.3
0.03
26.5
13.4
May
18.1
0.03
25.3
11.4
Jun
17.2
0.02
25.4
11.0
Jul
16.7
0.03
24.3
10.7
Aug
16.9
0.04
24.6
10.2
Sep
17.3
0.02
24.5
11.2
Oct
17.4
0.04
24.7
11.1
Nov
17.8
0.06
24.8
11.9
Dec
18.5
0.10
25.8
12.7
What the Santiago de Surco climate table shows
Values are multi-decadal climatological averages for the -12.13588, -77.00742 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
How much rain is 0.17 mm/day in a month?
Rain is recorded as a daily mean, so 0.17 mm/day is roughly 5 mm across a 30-day month.
Does Santiago get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.