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Mount Barker climate
Typical historical weather for Mount Barker, Australia, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Data last updated: 31 December 2025
Want today's actual conditions instead? See the current forecast for Mount Barker. Planning a garden? See the gardening & growing season planner. Or browse the 365-day climate calendar.
Annual average
14.7°C
across all months
Warmest month
25.5°C
Feb average high
Coolest month
7°C
Aug average low
Annual rainfall
474mm
total per year
Mount Barker is typically hottest in February and coolest in August, a swing of about 18.5°C across the year. About 39% of annual rainfall falls in the three wettest months (August is typically wettest, December 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 | 25.4°C · record 29.8°C–40.6°C | 13.3°C · record 6.6°C–10.6°C | 20mm | 3 | 68% | 4.3 m/s | 48% | 7 kWh/m² |
| Feb | 25.5°C · record 32°C–42.9°C | 14.1°C · record 8°C–11.3°C | 23mm | 4 | 69% | 4.3 m/s | 52% | 6.1 kWh/m² |
| Mar | 24°C · record 31.8°C–37.1°C | 13.8°C · record 4.6°C–10.3°C | 35mm | 7 | 73% | 4.1 m/s | 61% | 4.6 kWh/m² |
| Apr | 20.9°C · record 26.6°C–33.7°C | 11.3°C · record 4.5°C–9.2°C | 38mm | 6 | 76% | 3.6 m/s | 60% | 3.3 kWh/m² |
| May | 18.7°C · record 22.7°C–29.2°C | 9.1°C · record 3.2°C–7.4°C | 39mm | 6 | 77% | 3.9 m/s | 57% | 2.7 kWh/m² |
| Jun | 15.9°C · record 17.9°C–22.8°C | 8.1°C · record 1.5°C–4.7°C | 45mm | 10 | 81% | 4.2 m/s | 60% | 2.1 kWh/m² |
| Jul | 15°C · record 17.8°C–21.6°C | 7.3°C · record 1.5°C–4.9°C | 57mm | 12 | 81% | 4.8 m/s | 56% | 2.3 kWh/m² |
| Aug | 15.4°C · record 18.5°C–23.9°C | 7°C · record 0.3°C–4.5°C | 75mm | 13 | 81% | 4.5 m/s | 57% | 3 kWh/m² |
| Sep | 17°C · record 19.2°C–28.4°C | 7.4°C · record 0.3°C–4.7°C | 51mm | 10 | 79% | 4.1 m/s | 58% | 4.1 kWh/m² |
| Oct | 19°C · record 26.3°C–32.8°C | 8.5°C · record 1.7°C–5.9°C | 42mm | 9 | 75% | 4 m/s | 61% | 5.1 kWh/m² |
| Nov | 20.8°C · record 26°C–36.5°C | 10°C · record 3.7°C–9°C | 31mm | 6 | 72% | 4 m/s | 61% | 6.1 kWh/m² |
| Dec | 24°C · record 29.4°C–38.2°C | 11.9°C · record 5.3°C–8.7°C | 17mm | 3 | 68% | 4.2 m/s | 49% | 7.3 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 +1°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 -131.38mm per decade over the same period.
2025 (the most recent year on file) averaged 15.2°C, above the 9-year baseline of 14.7°C by 1.39 standard deviations.
Typical extremes per year
Rainy days
90.3 days
≥1.0mm rain
Heavy rain days
1.9 days
≥20mm rain
Extreme heat days
0.5 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
42.9°C
20 February 2024
2024 was 2.54 SD above the 9-year average that year
Coldest day
0.3°C
16 September 2018
2018 was 0.33 SD below the 9-year average that year
Wettest day
52.6mm
3 August 2020
2020 was 0.46 SD above the 9-year average that year
Windiest day
9.9m/s
25 May 2018
2018 was 0.33 SD below the 9-year average that year
See the detail: Mount Barker on 3 August 2020.
Nearby cities
Frequently asked questions about Mount Barker's climate
What is the hottest month in Mount Barker?
February is typically the warmest month in Mount Barker, with an average high of 25.5°C. August is typically the coolest, averaging 7°C overnight.
How much does it rain in Mount Barker?
Mount Barker gets about 474mm of rain a year on average, with roughly 39% of it falling in the three wettest months (August is typically the wettest, December the driest).
How many extremely hot or cold days does Mount Barker have?
On average, Mount Barker sees about 0.5 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 Mount Barker getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about +0.99°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 Mount Barker?
The hottest day on file is 20 February 2024 at 42.9°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
- Mount Barker — -34.750°, 117.750°, ERA5 grid cell center, 15.3 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 (2026-07-20). Historical climate data for Mount Barker, Australia (-34.75°S, 117.75°E), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Mount Barker, Australia [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Mount Barker, Australia." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 20, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Mount Barker, Australia},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-20},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.