Home / Perth / 20 January 2018
Perth
Australia · 20 January 2018
← 19 January 201821 January 2018 →
Average
25°C
low 20°C · high 31.1°C
Rainfall
0mm
dry day
Wind
5.3m/s
daily average
Humidity
61.5%
daily average
Cloud
3%
cover
Pressure
1009hPa
daily average
The temperature ranged from 20°C around 05:00 to 31.1°C around 14:00. No measurable rain was recorded during the day.
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
71th percentile
Low temperature
59th percentile
Rainfall
81th percentile
Wind
38th percentile
A percentile of 100 means this was the hottest/wettest/windiest of the comparable days on file; 50 is right in the middle. This window's average temperature was 24.1°C, versus 25°C on this specific day.
Sun & daylight
Sunrise
05:30
Sunset
19:25
Day length
13h 55m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — Australia/Perth.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 16:00 | 22.1°C | 20.8°C | 0 | 4.4 | ESE | 66 | 1011 |
| 01:00 | 17:00 | 21.8°C | 19.1°C | 0 | 5.6 | ESE | 61 | 1011 |
| 02:00 | 18:00 | 21.3°C | 18°C | 0 | 6.3 | ESE | 61 | 1011 |
| 03:00 | 19:00 | 20.8°C | 17.4°C | 0 | 6.4 | ESE | 63 | 1010 |
| 04:00 | 20:00 | 20.1°C | 16.8°C | 0 | 6.3 | ESE | 65 | 1010 |
| 05:00 | 21:00 | 20°C | 16.7°C | 0 | 6.2 | ESE | 66 | 1010 |
| 06:00 | 22:00 | 20.4°C | 17.5°C | 0 | 5.8 | E | 65 | 1011 |
| 07:00 | 23:00 | 22.7°C | 20.4°C | 0 | 5.5 | E | 61 | 1010 |
| 08:00 | 00:00 | 23.5°C | 21.7°C | 0 | 4.8 | E | 59 | 1011 |
| 09:00 | 01:00 | 24.9°C | 24.2°C | 0 | 3.7 | E | 57 | 1010 |
| 10:00 | 02:00 | 27°C | 27.5°C | 0 | 2.8 | ESE | 55 | 1010 |
| 11:00 | 03:00 | 27.8°C | 28.8°C | 0 | 2.3 | SE | 54 | 1009 |
| 12:00 | 04:00 | 29.9°C | 30.6°C | 0 | 2.8 | S | 48 | 1009 |
| 13:00 | 05:00 | 30.8°C | 31.1°C | 0 | 3.8 | S | 47 | 1008 |
| 14:00 | 06:00 | 31.1°C | 30.7°C | 0 | 4.8 | SSW | 47 | 1008 |
| 15:00 | 07:00 | 30.9°C | 29.9°C | 0 | 5.9 | SSW | 49 | 1007 |
| 16:00 | 08:00 | 29.4°C | 28.4°C | 0 | 6.3 | SSW | 55 | 1007 |
| 17:00 | 09:00 | 28.8°C | 27.9°C | 0 | 6.4 | SSW | 58 | 1006 |
| 18:00 | 10:00 | 26.5°C | 24.7°C | 0 | 7.3 | SSW | 65 | 1007 |
| 19:00 | 11:00 | 24.5°C | 22.8°C | 0 | 6.9 | SSW | 70 | 1007 |
| 20:00 | 12:00 | 24°C | 22.9°C | 0 | 6.2 | SSW | 73 | 1008 |
| 21:00 | 13:00 | 23.9°C | 23.2°C | 0 | 5.7 | SSW | 74 | 1008 |
| 22:00 | 14:00 | 23.5°C | 23.2°C | 0 | 5.2 | S | 78 | 1008 |
| 23:00 | 15:00 | 23.4°C | 23.5°C | 0 | 4.8 | S | 80 | 1008 |
Nearby cities
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Data 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
- Perth — -32.000°, 115.750°, ERA5 grid cell center, 11.8 km from requested point
- Time zone
- Australia/Perth
- What's shown here
- The hourly and daily record for 20 January 2018 specifically — not a monthly average. See the Perth climate overview for typical conditions.
- 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 (2026-07-21). Historical climate data for Perth, Australia (-32.00°S, 115.75°E), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Perth, Australia [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Perth, Australia." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Perth, Australia},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.