Karratha climate by month
What the weather is like
Karratha has a hot desert climate (Köppen BWh): very little rain and intense sun.
The warmest month is March, when afternoons average 32° and nights 27°. July is the coolest month, with highs of 24° and lows of 18°. The difference between the warmest and the coolest month is about 9°, a small seasonal swing typical of places tempered by the sea.
About 284 mm of precipitation falls in an average year. February is the wettest month (92 mm, 7 wet days) and October the driest (0 mm, 0 wet days). Cloud cover ranges from 4% in October to 29% in February.
The sea reaches about 30° in March. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Canberra, the capital, Karratha is 9.3° warmer on a March afternoon and receives less precipitation over the year.
Year in figures
- Hottest afternoons
- 32° · March
- Coldest nights
- 18° · July
- Wettest month
- February
- Driest month
- October
- Clearest skies
- October · 4% cloud
- Warmest sea
- 30° · March
- Longest day
- 13 h 23 min
- Shortest day
- 10 h 53 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 32° | 32° | 32° | 31° | 28° | 25° | 24° | 25° | 27° | 29° | 30° | 31° |
| Average low | 27° | 27° | 27° | 26° | 22° | 19° | 18° | 18° | 20° | 23° | 25° | 26° |
| Precipitation | 46 mm | 92 mm | 43 mm | 20 mm | 21 mm | 32 mm | 12 mm | 3 mm | 2 mm | 0 mm | 0 mm | 13 mm |
| Wet days (≥1 mm) | 6 | 6.7 | 6.5 | 2.8 | 3.8 | 2.5 | 0.7 | 1.7 | 0.7 | 0 | 0.2 | 2.2 |
| Cloud cover | 20% | 29% | 20% | 19% | 16% | 16% | 10% | 6% | 5% | 4% | 6% | 12% |
| Sea temperature | 29° | 30° | 30° | 29° | 27° | 24° | 23° | 23° | 24° | 25° | 27° | 28° |
| Daylight | 13h 15 | 12h 47 | 12h 14 | 11h 38 | 11h 08 | 10h 53 | 10h 59 | 11h 23 | 11h 57 | 12h 33 | 13h 05 | 13h 23 |
| Month score | 57 | 55 | 54 | 67 | 79 | 94 | 98 | 96 | 92 | 83 | 77 | 68 |