A consolidated reference for Chennai climate: monthly averages, rebuilt from public data on a schedule. Expect 24.1 C at the coldest (Jan) and 31.5 C at the warmest (May) — a 7.4 C spread. Expect a wet season rather than rain year-round: Nov brings 9.73 mm/day against 0.20 mm/day in Feb. Taken together that is roughly 1,247 mm of rain a year for the grid cell. The same build that regenerates the sitemap refreshes these values, and unchanged pages are left untouched. Scroll for the month-by-month figures, or jump to a neighbouring location from the links below.
Annual mean temperature 27.9 C
Warmest month May (31.5 C)
Coldest month Jan (24.1 C)
Wettest month Nov (9.73 mm/day)
All-time record high 42.7 C
All-time record low 17.2 C
Annual precipitation 1,252 mm / year
Coordinates 13.0878, 80.2785
Population 4,681,087
Average monthly temperature and rainfall in Chennai
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
24.1
0.53
31.1
17.2
Feb
25.6
0.20
36.1
18.3
Mar
28.4
0.47
39.4
19.7
Apr
30.5
0.88
41.6
22.7
May
31.5
1.79
42.7
24.3
Jun
30.6
2.26
41.4
24.2
Jul
29.7
3.49
39.3
23.6
Aug
29.0
4.27
37.7
23.4
Sep
28.3
4.83
36.8
22.6
Oct
27.4
8.50
35.0
20.8
Nov
25.8
9.73
34.0
18.1
Dec
24.4
4.06
30.7
17.8
What the Chennai climate table shows
Values are multi-decadal climatological averages for the 13.0878, 80.2785 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 9.73 mm/day in a month?
Rain is recorded as a daily mean, so 9.73 mm/day is roughly 296 mm across a 30-day month.
Does Chennai get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.