Perth vs Karratha: which is sunnier?
🇦🇺 Australia vs 🇦🇺 Australia · 1,251 km apart · long-term climate normals (NASA POWER, 2001–2020)
Karratha is the sunnier overall: about 3,645 hours of sunshine a year to Perth's 3,335. Karratha has the higher Sunshine Score in 11 of 12 months, Perth in 1.
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
At a glance
| Perth | Karratha | |
|---|---|---|
| Sunshine hours / year | 3,335 | 3,645 |
| Sunniest month | March (95/100) | August (100/100) |
| Nov–Feb average score | 79/100 | 91/100 |
| Jun–Aug average score | 65/100 | 97/100 |
| Rain / year | 610 mm | 335 mm |
| Warmest sea | 25°C / 77°F | 31°C / 88°F |
| Peak midday UV | 13 (extreme) | 14 (extreme) |
Perth vs Karratha month by month
| Month | Sunshine Score | Day high °C | Rain mm | Sea °C | ||||
|---|---|---|---|---|---|---|---|---|
| Perth | Karratha | Perth | Karratha | Perth | Karratha | Perth | Karratha | |
| January | 66 | 85 | 35° | 31° | 22 | 82 | 25° | 29° |
| February | 67 | 84 | 35° | 31° | 16 | 86 | 25° | 31° |
| March | 95 | 89 | 32° | 32° | 20 | 61 | 23° | 30° |
| April | 93 | 97 | 27° | 31° | 32 | 17 | 21° | 28° |
| May | 85 | 95 | 22° | 28° | 74 | 25 | 20° | 25° |
| June | 68 | 94 | 18° | 25° | 95 | 32 | 19° | 23° |
| July | 59 | 98 | 17° | 24° | 114 | 10 | 18° | 21° |
| August | 67 | 100 | 18° | 25° | 99 | 1 | 18° | 23° |
| September | 79 | 100 | 19° | 27° | 68 | 2 | 18° | 26° |
| October | 93 | 100 | 24° | 29° | 33 | 1 | 20° | 27° |
| November | 95 | 99 | 29° | 30° | 24 | 3 | 21° | 29° |
| December | 87 | 97 | 33° | 31° | 13 | 15 | 23° | 31° |
The sunnier month by month: Jan Karratha · Feb Karratha · Mar Perth · Apr Karratha · May Karratha · Jun Karratha · Jul Karratha · Aug Karratha · Sep Karratha · Oct Karratha · Nov Karratha · Dec Karratha.
When to pick which
- November–February: Karratha (average score 91/100 vs 79). Perth is the warmer, around 33°C daytime highs vs 31°C.
- March–May: Karratha (average score 94/100 vs 91). Karratha is the warmer, around 30°C daytime highs vs 27°C.
- June–August: Karratha (average score 97/100 vs 65). Karratha is the warmer, around 25°C daytime highs vs 18°C.
- September–October: Karratha (average score 100/100 vs 86). Karratha is the warmer, around 28°C daytime highs vs 22°C.
Sea temperature
Karratha's sea gets warmer: 31°C / 88°F at its peak vs 25°C. Swimmable water (21°C+): Perth about 6 months a year, Karratha all year. Month-by-month sea temperatures are in the table above.
Full month-by-month guides: Perth weather by month · Karratha weather by month · Best time to visit Australia.
More comparisons: Perth vs Kalgoorlie · Perth vs Newman · Karratha vs Port Hedland · Karratha vs Broome · Karratha vs Newman · all head-to-heads