Home / Copperopolis / 20 October 2018
Copperopolis
United States · 20 October 2018
← 19 October 201821 October 2018 →
Average
16.9°C
low 7.9°C · high 27.3°C
Rainfall
0mm
dry day
Wind
1.6m/s
daily average
Humidity
45.8%
daily average
Cloud
0%
cover
Pressure
1015hPa
daily average
The temperature ranged from 7.9°C around 07:00 to 27.3°C around 15:00. 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
73th percentile
Low temperature
21th percentile
Rainfall
75th percentile
Wind
29th 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 17°C, versus 16.9°C on this specific day.
Sun & daylight
Sunrise
07:16
Sunset
18:18
Day length
11h 2m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Los_Angeles.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 07:00 | 12.7°C | 10.3°C | 0 | 1.7 | ENE | 56 | 1016 |
| 01:00 | 08:00 | 12.3°C | 9.7°C | 0 | 1.6 | ENE | 54 | 1016 |
| 02:00 | 09:00 | 11.2°C | 8.4°C | 0 | 1.7 | ENE | 55 | 1016 |
| 03:00 | 10:00 | 10.1°C | 7.3°C | 0 | 1.7 | ENE | 61 | 1016 |
| 04:00 | 11:00 | 8.9°C | 6°C | 0 | 1.7 | ENE | 61 | 1016 |
| 05:00 | 12:00 | 8.7°C | 5.9°C | 0 | 1.7 | ENE | 62 | 1016 |
| 06:00 | 13:00 | 8.3°C | 5.4°C | 0 | 1.6 | ENE | 64 | 1016 |
| 07:00 | 14:00 | 7.9°C | 5.1°C | 0 | 1.5 | ENE | 64 | 1017 |
| 08:00 | 15:00 | 9°C | 5.9°C | 0 | 1.6 | ENE | 54 | 1017 |
| 09:00 | 16:00 | 15.1°C | 12.4°C | 0 | 1.4 | ENE | 40 | 1017 |
| 10:00 | 17:00 | 19.4°C | 17.1°C | 0 | 0.4 | NNW | 27 | 1017 |
| 11:00 | 18:00 | 21.5°C | 19.1°C | 0 | 0.8 | W | 26 | 1016 |
| 12:00 | 19:00 | 22.9°C | 20.6°C | 0 | 1.4 | WSW | 28 | 1016 |
| 13:00 | 20:00 | 24.3°C | 22°C | 0 | 1.7 | W | 29 | 1015 |
| 14:00 | 21:00 | 25.7°C | 22.8°C | 0 | 1.9 | W | 22 | 1014 |
| 15:00 | 22:00 | 27.3°C | 25.1°C | 0 | 2.1 | W | 27 | 1014 |
| 16:00 | 23:00 | 27.2°C | 25.1°C | 0 | 2.1 | WNW | 29 | 1013 |
| 17:00 | 00:00 | 26.8°C | 25°C | 0 | 1.8 | NW | 31 | 1013 |
| 18:00 | 01:00 | 23.5°C | 21.8°C | 0 | 2 | NNW | 39 | 1013 |
| 19:00 | 02:00 | 20.8°C | 18.7°C | 0 | 2.1 | N | 43 | 1013 |
| 20:00 | 03:00 | 17.5°C | 15.8°C | 0 | 1.7 | NNE | 53 | 1013 |
| 21:00 | 04:00 | 15.7°C | 14.1°C | 0 | 1.4 | NE | 58 | 1013 |
| 22:00 | 05:00 | 14.7°C | 13.2°C | 0 | 1.1 | NE | 59 | 1014 |
| 23:00 | 06:00 | 14.4°C | 12.9°C | 0 | 1.1 | NNE | 61 | 1014 |
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 United States
- Location
- Copperopolis — 38.000°, -120.750°, ERA5 grid cell center, 9.7 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 20 October 2018 specifically — not a monthly average. See the Copperopolis 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 (2026-07-18). Historical climate data for Copperopolis, United States (38.00°N, 120.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Copperopolis, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Copperopolis, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Copperopolis, United States},
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.