Home / Copperopolis / 18 October 2021
Copperopolis
United States · 18 October 2021
← 17 October 202119 October 2021 →
Average
11.5°C
low 7.9°C · high 15.8°C
Rainfall
1.6mm
rain recorded
Wind
1.5m/s
daily average
Humidity
67.7%
daily average
Cloud
43%
cover
Pressure
1016hPa
daily average
The temperature ranged from 7.9°C around 05:00 to 15.8°C around 17:00. Rain was recorded across 7 hours, from around 00:00 to 10:00 (1.6mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
1th percentile
Low temperature
19th percentile
Rainfall
93th percentile
Wind
20th 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 17.4°C, versus 11.5°C on this specific day.
Sun & daylight
Sunrise
07:14
Sunset
18:20
Day length
11h 6m
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°C | 11°C | 0.4 | 0.8 | W | 77 | 1015 |
| 01:00 | 08:00 | 11.8°C | 11.3°C | 0.04 | 0.3 | SE | 83 | 1015 |
| 02:00 | 09:00 | 10.8°C | 9.8°C | 0.03 | 0.7 | SE | 81 | 1015 |
| 03:00 | 10:00 | 9.6°C | 7.7°C | 0.14 | 1.1 | SW | 75 | 1015 |
| 04:00 | 11:00 | 8.6°C | 7.2°C | 0.17 | 0.4 | S | 79 | 1015 |
| 05:00 | 12:00 | 7.9°C | 5.8°C | 0.17 | 1.3 | ESE | 84 | 1015 |
| 06:00 | 13:00 | 8.1°C | 5.8°C | 0.04 | 1.8 | SE | 85 | 1015 |
| 07:00 | 14:00 | 8.8°C | 6.8°C | 0.09 | 1.4 | SE | 82 | 1016 |
| 08:00 | 15:00 | 9.2°C | 7.4°C | 0.12 | 1.2 | SE | 79 | 1017 |
| 09:00 | 16:00 | 10.4°C | 8.5°C | 0.14 | 1.5 | SE | 76 | 1017 |
| 10:00 | 17:00 | 11.6°C | 9.8°C | 0.12 | 1.4 | SSE | 70 | 1018 |
| 11:00 | 18:00 | 12.6°C | 10.9°C | 0.08 | 1.2 | SSE | 64 | 1018 |
| 12:00 | 19:00 | 13.6°C | 11.8°C | 0.05 | 1.1 | SSW | 59 | 1017 |
| 13:00 | 20:00 | 14°C | 12°C | 0.01 | 1.5 | WSW | 58 | 1017 |
| 14:00 | 21:00 | 15.3°C | 13°C | 0.01 | 1.9 | W | 51 | 1016 |
| 15:00 | 22:00 | 15.4°C | 13°C | 0.01 | 1.7 | WNW | 49 | 1016 |
| 16:00 | 23:00 | 15.6°C | 12.9°C | 0 | 2 | WNW | 48 | 1016 |
| 17:00 | 00:00 | 15.8°C | 12.7°C | 0 | 2.5 | WNW | 46 | 1016 |
| 18:00 | 01:00 | 14.6°C | 11.1°C | 0 | 3.1 | WNW | 49 | 1016 |
| 19:00 | 02:00 | 13°C | 10.1°C | 0 | 2.2 | NW | 55 | 1016 |
| 20:00 | 03:00 | 10.6°C | 7.9°C | 0 | 1.9 | NNW | 64 | 1016 |
| 21:00 | 04:00 | 9.8°C | 7.3°C | 0 | 1.6 | N | 67 | 1017 |
| 22:00 | 05:00 | 9°C | 6.3°C | 0 | 1.9 | NNE | 70 | 1017 |
| 23:00 | 06:00 | 8.2°C | 5.5°C | 0 | 1.9 | NE | 76 | 1017 |
Nearby cities
Need this verified for an official or legal purpose? Request a weather verification report.
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 18 October 2021 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 (2026-07-21). 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 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Copperopolis, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 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 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.