The parish has extremely hot summers and mild winters. Summers would usually exceed 36 °C. Winters are usually around 17 °C. The annual average rainfall is 249.7 millimetres (9.8 in) which would make it a semi-arid climate except that its high evapotranspiration, or its aridity, makes it a desert climate.
| Climate data for White Cliffs Post Office (1901-2012) |
| Month |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Year |
| Record high °C (°F) |
48.6
(119.5) |
46.9
(116.4) |
44.1
(111.4) |
37.9
(100.2) |
31.9
(89.4) |
28.0
(82.4) |
28.8
(83.8) |
33.0
(91.4) |
39.5
(103.1) |
41.7
(107.1) |
45.0
(113.0) |
45.8
(114.4) |
48.6
(119.5) |
| Mean daily maximum °C (°F) |
35.8
(96.4) |
34.9
(94.8) |
31.6
(88.9) |
26.4
(79.5) |
21.4
(70.5) |
17.6
(63.7) |
17.2
(63.0) |
19.7
(67.5) |
23.9
(75.0) |
27.9
(82.2) |
31.5
(88.7) |
34.4
(93.9) |
26.9
(80.4) |
| Mean daily minimum °C (°F) |
20.9
(69.6) |
20.4
(68.7) |
17.2
(63.0) |
12.4
(54.3) |
8.2
(46.8) |
5.3
(41.5) |
4.1
(39.4) |
5.6
(42.1) |
9.0
(48.2) |
12.9
(55.2) |
16.4
(61.5) |
19.2
(66.6) |
12.6
(54.7) |
| Record low °C (°F) |
12.1
(53.8) |
8.8
(47.8) |
7.2
(45.0) |
2.6
(36.7) |
−0.5
(31.1) |
−2.3
(27.9) |
−3.3
(26.1) |
−1.7
(28.9) |
0.2
(32.4) |
2.0
(35.6) |
3.4
(38.1) |
6.8
(44.2) |
−3.3
(26.1) |
| Average precipitation mm (inches) |
27.7
(1.09) |
27.1
(1.07) |
23.8
(0.94) |
15.4
(0.61) |
20.8
(0.82) |
19.0
(0.75) |
18.2
(0.72) |
15.4
(0.61) |
15.0
(0.59) |
23.2
(0.91) |
19.2
(0.76) |
25.1
(0.99) |
249.7
(9.83) |
| Average precipitation days |
3.0 |
2.8 |
2.5 |
2.2 |
3.4 |
3.7 |
3.8 |
3.4 |
3.0 |
3.6 |
3.1 |
3.0 |
37.5 |
| Source: [5] |
