Home / Cornwall / 1 September 2018
Cornwall
United States · 1 September 2018
← 31 August 20182 September 2018 →
Average
22.2°C
low 20.2° · high 25.6°
Rainfall
3.7mm
rain recorded
Wind
2.8m/s
daily average
Humidity
87.5%
daily average
Cloud
83%
cover
Pressure
1024hPa
daily average
The temperature ranged from 20.2°C around 05:00 to 25.6°C around 18:00. Rain was recorded across 12 hours, from around 03:00 to 14:00 (3.7mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
30th percentile
Low temperature
70th percentile
Rainfall
81th percentile
Wind
74th 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 22.2°C, versus 22.2°C on this specific day.
Sun & daylight
Sunrise
06:33
Sunset
19:37
Day length
13h 4m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/New_York.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 04:00 | 21.3 | 22.2 | 0.03 | 3.8 | E | 90 | 1024 |
| 01:00 | 05:00 | 20.8 | 21.6 | 0.02 | 3.6 | E | 90 | 1024 |
| 02:00 | 06:00 | 20.4 | 21.2 | 0.08 | 3.3 | E | 90 | 1024 |
| 03:00 | 07:00 | 20.4 | 21.3 | 0.52 | 3.1 | E | 90 | 1024 |
| 04:00 | 08:00 | 20.4 | 21.3 | 0.29 | 3.2 | E | 91 | 1024 |
| 05:00 | 09:00 | 20.2 | 21 | 0.16 | 3.4 | E | 93 | 1024 |
| 06:00 | 10:00 | 20.7 | 22.2 | 0.14 | 2.5 | E | 90 | 1025 |
| 07:00 | 11:00 | 20.7 | 22.3 | 0.23 | 2.4 | E | 90 | 1025 |
| 08:00 | 12:00 | 20.9 | 22.1 | 0.35 | 3.2 | ESE | 91 | 1026 |
| 09:00 | 13:00 | 21.1 | 22.7 | 0.27 | 3.1 | E | 93 | 1026 |
| 10:00 | 14:00 | 21.3 | 22.9 | 0.34 | 3.1 | ESE | 93 | 1026 |
| 11:00 | 15:00 | 22.2 | 23.8 | 0.44 | 2.9 | ESE | 87 | 1025 |
| 12:00 | 16:00 | 22.3 | 24.7 | 0.44 | 2.3 | SE | 90 | 1025 |
| 13:00 | 17:00 | 22.2 | 24.7 | 0.16 | 1.7 | ESE | 88 | 1025 |
| 14:00 | 18:00 | 23 | 25.8 | 0.14 | 1.7 | ESE | 86 | 1025 |
| 15:00 | 19:00 | 23.7 | 26.2 | 0.03 | 2.2 | ESE | 84 | 1024 |
| 16:00 | 20:00 | 24 | 26.5 | 0 | 2.5 | ESE | 84 | 1023 |
| 17:00 | 21:00 | 24.5 | 27.1 | 0.01 | 2.8 | ESE | 84 | 1023 |
| 18:00 | 22:00 | 25.6 | 28.5 | 0.05 | 2.1 | E | 77 | 1023 |
| 19:00 | 23:00 | 24.8 | 26.8 | 0 | 2.7 | ESE | 78 | 1023 |
| 20:00 | 00:00 | 24.1 | 25.8 | 0 | 3.1 | SE | 80 | 1024 |
| 21:00 | 01:00 | 23.4 | 25 | 0 | 3.1 | SE | 82 | 1024 |
| 22:00 | 02:00 | 23 | 24.9 | 0 | 3 | ESE | 86 | 1024 |
| 23:00 | 03:00 | 22.7 | 24.8 | 0 | 3 | SE | 89 | 1024 |
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
- 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 1 September 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 (2026-07-18). 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 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Cornwall, 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 Cornwall, 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.