A consolidated reference for Christchurch climate: monthly averages, rebuilt from public data on a schedule. Expect 5.9 C at the coldest (Jul) and 17.5 C at the warmest (Jan) — a 11.6 C spread. Expect a wet month and a dry month but no real season: 2.68 mm/day in Jun against 1.91 mm/day in Sep. Taken together that is roughly 844 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 11.6 C
Warmest month Jan (17.5 C)
Coldest month Jul (5.9 C)
Wettest month Jun (2.68 mm/day)
All-time record high 37.3 C
All-time record low -5.4 C
Annual precipitation 843 mm / year
Coordinates -43.53333, 172.63333
Population 419,200
Average monthly temperature and rainfall in Christchurch
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
17.5
2.15
35.2
5.6
Feb
17.1
2.07
37.3
5.4
Mar
15.1
1.96
32.6
4.4
Apr
11.9
2.55
26.5
1.4
May
9.2
2.54
24.4
-1.3
Jun
6.6
2.68
19.2
-5.4
Jul
5.9
2.34
18.7
-2.8
Aug
7.1
2.27
21.5
-2.0
Sep
8.9
1.91
22.4
-2.1
Oct
10.8
2.51
25.4
-1.5
Nov
13.2
2.28
30.2
0.5
Dec
15.8
2.49
33.6
2.7
What the Christchurch climate table shows
Values are multi-decadal climatological averages for the -43.53333, 172.63333 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 Christchurch get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.