Karratha climate — normals and trends
Karratha (Australia) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 25.8 °C and it receives 305 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is March (29.5 °C on average) and the coldest is July (20.7 °C). Rainfall peaks in February.
Karratha averages 0 frost days, 142 hot days (≥ 30 °C) and 24 rainy days per year.
Karratha has warmed by +1.1 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.1 °C (on 13 January 1993) and the coldest 11.8 °C (on 25 June 1955).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
KarrathaWestern Australia
- coords
- -20.74°, 116.85°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.8°C
Average daily high
28.5°C
Average daily low
23.1°C
Annual rainfall
305mm
Sunshine / day
11.3h
Mean relative humidity
60%
Average peak wind
27.1km/h
Seasonal range
8.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
142 d/yr
Rainy days (≥ 1 mm)
24 d/yr
Annual snowfall
0.0 cm
Average feels-like high
29.9 °C
Average feels-like low
22.6 °C
Average peak gust
39.1 km/h
Tropical nights (≥ 20 °C)
268 d/yr
Solar radiation
23.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.44 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
41.1 °C
13 January 1993
Coldest day
11.8 °C
25 June 1955
Wettest day
163 mm
1 March 1956
Windiest day
114.2 km/h
23 April 1989
Strongest gust
172.8 km/h
30 March 2006
Hottest feels-like
45.1 °C
2 March 2025
Coldest feels-like
5.1 °C
13 August 1986
Sunniest day
12.9 h
27 January 2025
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 32.7 °C | +1.1 °C | 212 mm | +165 mm |
| Feb | 33.9 °C | +2.2 °C | 4 mm | -76 mm |
| Mar | 34.3 °C | +2.3 °C | 5 mm | -59 mm |
| Apr | 32.2 °C | +1.5 °C | 3 mm | -19 mm |
| May | 27.8 °C | +0.6 °C | 3 mm | -29 mm |
| Jun | 24.7 °C | +0.5 °C | 15 mm | -15 mm |
| Jul | 22.9 °C | -0.6 °C | 4 mm | -8 mm |
| Aug | 24.5 °C | 0.0 °C | 11 mm | +6 mm |
| Sep | 27.0 °C | +0.6 °C | 1 mm | -1 mm |
| Oct | 30.8 °C | +2.1 °C | 0 mm | -0 mm |
| Nov | 29.0 °C | -1.0 °C | 0 mm | -1 mm |
| Dec | 33.6 °C | +2.4 °C | 1 mm | -12 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Karratha?
Karratha has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 25.8 °C and it receives 305 mm of precipitation per year.
What is the hottest day ever recorded in Karratha?
The hottest day measured in Karratha between 1940 and 2025 was 13 January 1993, reaching 41.1 °C.
What is the coldest day in Karratha?
The coldest day measured in Karratha between 1940 and 2025 was 25 June 1955, at 11.8 °C.
Does it snow in Karratha?
Almost never: Karratha sees virtually no snow, with about 0 frost days per year.
Has the climate of Karratha warmed?
Yes: Karratha warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Karratha?
The wettest day measured in Karratha between 1940 and 2025 was 1 March 1956, with 163 mm of rain in 24 hours.
What was the windiest day in Karratha?
The windiest day measured in Karratha between 1940 and 2025 was 23 April 1989, with winds reaching 114.2 km/h.
What is the warmest month in Karratha?
The warmest month in Karratha is March (29.5 °C on average); the coldest is July (20.7 °C).
How much does it rain in Karratha?
Karratha receives on average 305 mm of precipitation per year, spread over about 24 rainy days.
Is it sunny in Karratha?
Karratha gets on average 11.3 hours of sunshine per day, roughly 4,125 hours per year over 1940-2025.
Are there tropical nights in Karratha?
Yes: Karratha has on average 268 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Karratha?
In Karratha, between 1940 and 2025, the highest apparent temperature reached 45.1 °C on 2 March 2025, and the lowest was 5.1 °C on 13 August 1986.
Compare Karratha with another city
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