Karratha climate
Typical historical weather for Karratha, Australia, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Want today's actual conditions instead? See the current forecast for Karratha. Planning a garden? See the gardening & growing season planner. Or browse the 365-day climate calendar.
Annual average
26.4°C
across all months
Warmest month
32.8°C
Mar average high
Coolest month
17.6°C
Jul average low
Annual rainfall
300mm
total per year
Karratha is typically hottest in March and coolest in July, a swing of about 15.2°C across the year. About 59% of annual rainfall falls in the three wettest months (February is typically wettest, November driest).
Monthly averages
Average daily high/low temperature (band) and monthly rainfall (bars).
| Month | Avg high | Avg low | Rainfall | Wet days | Humidity | Wind | Cloud | Solar |
|---|---|---|---|---|---|---|---|---|
| Jan | 32.2°C · record 33.9–40.8°C | 27.9°C · record 23.9–26.9°C | 54mm | 4 | 69% | 5.8 m/s | 38% | 7.5 kWh/m² |
| Feb | 32.3°C · record 33.3–37.9°C | 27.9°C · record 24.4–26.9°C | 64mm | 4 | 70% | 5.2 m/s | 33% | 7.2 kWh/m² |
| Mar | 32.8°C · record 34–38.7°C | 28.2°C · record 24.2–27°C | 61mm | 4 | 66% | 4.9 m/s | 29% | 6.5 kWh/m² |
| Apr | 31.4°C · record 33–35.6°C | 26.1°C · record 20.9–25°C | 15mm | 2 | 58% | 4.7 m/s | 31% | 5.7 kWh/m² |
| May | 27.6°C · record 29.3–31.6°C | 21.9°C · record 16.3–19.6°C | 45mm | 2 | 55% | 5.1 m/s | 26% | 4.8 kWh/m² |
| Jun | 24.3°C · record 25.2–28°C | 18.8°C · record 12.8–16.9°C | 26mm | 3 | 59% | 5.3 m/s | 30% | 4.1 kWh/m² |
| Jul | 23.9°C · record 25.3–27.8°C | 17.6°C · record 13.2–16°C | 5mm | 1 | 56% | 4.9 m/s | 17% | 4.6 kWh/m² |
| Aug | 25°C · record 25.4–32.9°C | 18.6°C · record 13.9–17.5°C | 5mm | 1 | 56% | 4.9 m/s | 13% | 5.5 kWh/m² |
| Sep | 27.4°C · record 27.9–32.4°C | 21°C · record 15.9–20.8°C | 7mm | 1 | 53% | 5.2 m/s | 12% | 6.7 kWh/m² |
| Oct | 29.7°C · record 29.8–35.1°C | 23.4°C · record 18–22.4°C | 1mm | 0 | 53% | 5.7 m/s | 9% | 7.7 kWh/m² |
| Nov | 30.5°C · record 32.1–36.8°C | 24.9°C · record 19.5–24.7°C | 0mm | 0 | 57% | 6 m/s | 13% | 8.1 kWh/m² |
| Dec | 32.4°C · record 34.4–38.6°C | 27.3°C · record 20.8–26.3°C | 18mm | 1 | 62% | 5.8 m/s | 19% | 7.9 kWh/m² |
"Avg high"/"Avg low" is the mean daily high/low for that month, averaged across every year on file. The "record" figure alongside it is a different statistic — the single hottest (or coldest) hour ever recorded during that month across all years — so it can sit above or below the average and does not describe the average's year-to-year spread. A "wet day" is any day with at least 1.0mm of rain.
Year to year
Annual average temperature, 2016–2025.
Across these 10 years, the annual average has moved by about +0.41°C per decade. That’s a short window for a reliable long-term climate trend — treat it as indicative, not definitive.
Annual rainfall has moved by about -30.96mm per decade over the same period.
2025 (the most recent year on file) averaged 26.753149023883438°C, above the 9-year baseline of 26.3°C by 1.42 standard deviations.
Typical extremes per year
Rainy days
21.8 days
≥1.0mm rain
Heavy rain days
3.8 days
≥20mm rain
Extreme heat days
0.1 days
daily high ≥40°C
Frost days
0 days
daily low ≤0°C
Averaged across 10 years on file. Thresholds match PastClimate's data pipeline definitions — see data & sources.
Records on file
Ranked across 10 years of data currently on file (2016–2025).
Hottest day
40.8°C
13 January 2022
2022 was 2.05 SD below the 9-year average that year
Coldest day
12.8°C
24 June 2021
2021 was 0.76 SD below the 9-year average that year
Wettest day
131mm
29 May 2022
2022 was 2.05 SD below the 9-year average that year
Windiest day
19.9m/s
24 March 2019
2019 was 1.14 SD above the 9-year average that year
See the detail: Karratha on 29 May 2022.
Nearby cities
Nickol
Same ERA5 grid cell
Baynton
Same ERA5 grid cell
Bulgarra
Same ERA5 grid cell
Pegs Creek
Same ERA5 grid cell
Wickham
52 km away
Port Hedland
184.2 km away
Want a side-by-side view instead? Compare Karratha with another city.
Frequently asked questions about Karratha's climate
What is the hottest month in Karratha?
March is typically the warmest month in Karratha, with an average high of 32.8°C. July is typically the coolest, averaging 17.6°C overnight.
How much does it rain in Karratha?
Karratha gets about 300mm of rain a year on average, with roughly 59% of it falling in the three wettest months (February is typically the wettest, November the driest).
How many extremely hot or cold days does Karratha have?
On average, Karratha sees about 0.1 day(s) a year at or above 40°C and about 0 day(s) at or below 0°C, based on 10 years of data.
Is Karratha getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about +0.41°C per decade. That's a short window for a reliable long-term climate trend — treat it as indicative, not definitive.
What is the hottest day on record for Karratha?
The hottest day on file is 13 January 2022 at 40.8°C, out of 10 year(s) searched.
Data & provenance
↓ Download monthly CSVData source & coverage — ERA5 reanalysis, 2016–2025 (10 years)details
- Source
- ERA5 reanalysis, accessed via the Copernicus Climate Change Service (C3S) Climate Data Store
- Data type
- Reanalysis — a physically consistent reconstruction combining a forecast model with historical observations, not a live station reading or a forecast
- Coverage
- 2016–2025 (10 years) for Australia
- Location
- Karratha — -20.750°, 116.750°, ERA5 grid cell center, 10.1 km from requested point
- Time zone
- Australia/Perth
- What's shown here
- Monthly and annual averages, and dated extreme-value records, derived from an hourly base record.
- Spatial resolution
- 0.25° (~25 km) distributed grid — ERA5's native model resolution is finer; this is the publicly distributed regridded product
- Version / refreshed
- Methodology v2026.07 · data last refreshed December 31, 2025
- Limitations
- A model reconstruction, not a station observation — hyper-local extremes (a single storm cell, an urban heat pocket) can differ from a nearby gauge. See the full methodology.
- Attribution
- Generated using Copernicus Climate Change Service information
Cite this data
PastClimate (2026-07-18). Historical climate data for Karratha, Australia (-20.75°S, 116.75°E), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Karratha, Australia [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Karratha, Australia." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Karratha, Australia},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.