Home / Cornwall / 31 August 2018
Cornwall
United States · 31 August 2018
← 30 August 20181 September 2018 →
Average
23.4°C
low 21.4°C · high 25.3°C
Rainfall
14.4mm
rain recorded
Wind
3.6m/s
daily average
Humidity
82.5%
daily average
Cloud
95%
cover
Pressure
1022hPa
daily average
The temperature ranged from 21.4°C around 23:00 to 25.3°C around 15:00. Rain was recorded across 15 hours, from around 02:00 to 20:00 (14.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
28th percentile
Low temperature
82th percentile
Rainfall
96th percentile
Wind
95th 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 22.3°C, versus 23.4°C on this specific day.
Sun & daylight
Sunrise
06:32
Sunset
19:39
Day length
13h 7m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/New_York.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 04:00 | 24.4°C | 26.1°C | 0 | 2.6 | NE | 75 | 1020 |
| 01:00 | 05:00 | 23.9°C | 25.2°C | 0 | 2.8 | ENE | 74 | 1020 |
| 02:00 | 06:00 | 23.4°C | 24.2°C | 0.1 | 2.9 | ENE | 72 | 1021 |
| 03:00 | 07:00 | 23.1°C | 23.5°C | 0.01 | 3.1 | ENE | 71 | 1020 |
| 04:00 | 08:00 | 22.6°C | 23.1°C | 0.01 | 3 | ENE | 74 | 1021 |
| 05:00 | 09:00 | 22.2°C | 22.7°C | 0 | 2.9 | ENE | 74 | 1021 |
| 06:00 | 10:00 | 22.4°C | 23.3°C | 0.02 | 2.9 | NE | 78 | 1020 |
| 07:00 | 11:00 | 22.3°C | 23.1°C | 0.15 | 3.3 | ENE | 79 | 1022 |
| 08:00 | 12:00 | 22.5°C | 23.2°C | 0.29 | 3.5 | ENE | 81 | 1022 |
| 09:00 | 13:00 | 23°C | 24.3°C | 0.57 | 3.6 | ENE | 85 | 1023 |
| 10:00 | 14:00 | 23.5°C | 24.1°C | 0.55 | 5 | E | 85 | 1023 |
| 11:00 | 15:00 | 24°C | 24.8°C | 0.52 | 4.5 | ESE | 81 | 1023 |
| 12:00 | 16:00 | 24.5°C | 25.8°C | 0.17 | 4.5 | ESE | 83 | 1023 |
| 13:00 | 17:00 | 24.7°C | 26.7°C | 0.57 | 3.9 | ESE | 85 | 1023 |
| 14:00 | 18:00 | 25.1°C | 27.5°C | 0.37 | 3.7 | ESE | 86 | 1022 |
| 15:00 | 19:00 | 25.3°C | 27.3°C | 5.03 | 4.1 | ESE | 83 | 1023 |
| 16:00 | 20:00 | 24.3°C | 26.8°C | 2.4 | 3.2 | E | 86 | 1022 |
| 17:00 | 21:00 | 24.5°C | 26.9°C | 0.83 | 3.6 | E | 88 | 1022 |
| 18:00 | 22:00 | 24°C | 25.8°C | 1 | 4.5 | E | 91 | 1022 |
| 19:00 | 23:00 | 23.1°C | 24.6°C | 1.23 | 4 | E | 89 | 1023 |
| 20:00 | 00:00 | 22.6°C | 23.8°C | 0.34 | 4.1 | E | 90 | 1023 |
| 21:00 | 01:00 | 22.2°C | 23.3°C | 0.08 | 3.9 | E | 89 | 1024 |
| 22:00 | 02:00 | 21.9°C | 23°C | 0.07 | 3.8 | E | 89 | 1024 |
| 23:00 | 03:00 | 21.4°C | 22.4°C | 0.08 | 3.8 | E | 92 | 1024 |
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
- Cornwall — 40.250°, -76.500°, ERA5 grid cell center, 8.4 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 31 August 2018 specifically — not a monthly average. See the Cornwall 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 (2026-07-19). Historical climate data for Cornwall, United States (40.25°N, 76.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Cornwall, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 19, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Cornwall, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 19, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Cornwall, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-19},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.