Ōpoā has a tropical rainforest climate (Köppen climate classification Af). The average annual temperature in Ōpoā is 26.6 °C (79.9 °F). The average annual rainfall is 3,686.8 mm (145.15 in) with December as the wettest month. The temperatures are highest on average in March, at around 27.7 °C (81.9 °F), and lowest in August, at around 25.4 °C (77.7 °F). The highest temperature ever recorded in Ōpoā was 35.2 °C (95.4 °F) on 12 January 1998; the coldest temperature ever recorded was 16.5 °C (61.7 °F) on 13 September 2002.
| Climate data for Ōpoā (1991–2020 averages, extremes 1991−present) |
| Month |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Year |
| Record high °C (°F) |
35.2
(95.4) |
34.5
(94.1) |
35.0
(95.0) |
35.0
(95.0) |
33.8
(92.8) |
33.7
(92.7) |
32.5
(90.5) |
32.1
(89.8) |
32.4
(90.3) |
33.0
(91.4) |
34.0
(93.2) |
34.5
(94.1) |
35.2
(95.4) |
| Mean daily maximum °C (°F) |
31.4
(88.5) |
31.5
(88.7) |
31.9
(89.4) |
31.6
(88.9) |
30.8
(87.4) |
29.9
(85.8) |
29.5
(85.1) |
29.3
(84.7) |
29.6
(85.3) |
30.1
(86.2) |
30.8
(87.4) |
31.0
(87.8) |
30.6
(87.1) |
| Daily mean °C (°F) |
27.3
(81.1) |
27.4
(81.3) |
27.7
(81.9) |
27.5
(81.5) |
26.8
(80.2) |
26.0
(78.8) |
25.6
(78.1) |
25.4
(77.7) |
25.7
(78.3) |
26.2
(79.2) |
26.9
(80.4) |
27.1
(80.8) |
26.6
(79.9) |
| Mean daily minimum °C (°F) |
23.2
(73.8) |
23.3
(73.9) |
23.4
(74.1) |
23.3
(73.9) |
22.9
(73.2) |
22.1
(71.8) |
21.7
(71.1) |
21.4
(70.5) |
21.8
(71.2) |
22.3
(72.1) |
22.9
(73.2) |
23.1
(73.6) |
22.6
(72.7) |
| Record low °C (°F) |
20.0
(68.0) |
19.5
(67.1) |
20.5
(68.9) |
19.5
(67.1) |
17.1
(62.8) |
16.5
(61.7) |
16.7
(62.1) |
16.5
(61.7) |
16.5
(61.7) |
17.8
(64.0) |
18.1
(64.6) |
20.4
(68.7) |
16.5
(61.7) |
| Average precipitation mm (inches) |
408.9
(16.10) |
351.2
(13.83) |
279.3
(11.00) |
323.4
(12.73) |
319.6
(12.58) |
232.8
(9.17) |
195.4
(7.69) |
191.5
(7.54) |
249.5
(9.82) |
328.6
(12.94) |
337.2
(13.28) |
469.4
(18.48) |
3,686.8
(145.15) |
| Average precipitation days (≥ 1.0 mm) |
21.1 |
19.1 |
19.2 |
17.1 |
17.0 |
15.6 |
15.5 |
13.9 |
15.4 |
17.6 |
18.1 |
21.3 |
210.9 |
| Source: Météo-France[2] |
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