Home / Cornwall / 2 September 2018
Cornwall
United States · 2 September 2018
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Average
24.9°C
low 21.5° · high 30.5°
Rainfall
0.9mm
dry day
Wind
1.8m/s
daily average
Humidity
82.8%
daily average
Cloud
77%
cover
Pressure
1023hPa
daily average
The temperature ranged from 21.5°C around 05:00 to 30.5°C around 17:00. Rain was recorded across 2 hours, from around 06:00 to 07:00 (0.9mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
79th percentile
Low temperature
83th percentile
Rainfall
71th percentile
Wind
21th 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°C, versus 24.9°C on this specific day.
Sun & daylight
Sunrise
06:34
Sunset
19:36
Day length
13h 2m
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 | 22.6 | 24.5 | 0 | 3.1 | SE | 89 | 1024 |
| 01:00 | 05:00 | 22.3 | 24.2 | 0 | 3 | SE | 90 | 1024 |
| 02:00 | 06:00 | 21.9 | 23.6 | 0.02 | 2.8 | SE | 90 | 1023 |
| 03:00 | 07:00 | 21.8 | 23.7 | 0.04 | 2.6 | SE | 90 | 1023 |
| 04:00 | 08:00 | 21.8 | 24 | 0.04 | 2.3 | SE | 91 | 1024 |
| 05:00 | 09:00 | 21.5 | 24 | 0.07 | 1.9 | SE | 94 | 1023 |
| 06:00 | 10:00 | 21.8 | 24.5 | 0.1 | 1.7 | SE | 92 | 1024 |
| 07:00 | 11:00 | 21.5 | 24.4 | 0.22 | 1.4 | SE | 94 | 1024 |
| 08:00 | 12:00 | 21.8 | 24.7 | 0.09 | 1.8 | SE | 95 | 1025 |
| 09:00 | 13:00 | 22 | 24.8 | 0.02 | 2.2 | SE | 96 | 1025 |
| 10:00 | 14:00 | 23 | 25.9 | 0.01 | 2.2 | SSE | 92 | 1025 |
| 11:00 | 15:00 | 25 | 27.6 | 0.07 | 2.2 | S | 78 | 1025 |
| 12:00 | 16:00 | 26.2 | 29.5 | 0.06 | 1.8 | S | 77 | 1024 |
| 13:00 | 17:00 | 26.8 | 30.4 | 0.05 | 1.6 | SW | 76 | 1024 |
| 14:00 | 18:00 | 28.2 | 32.3 | 0.03 | 1.3 | SW | 71 | 1023 |
| 15:00 | 19:00 | 29 | 33.4 | 0 | 1.1 | SW | 69 | 1023 |
| 16:00 | 20:00 | 29.7 | 34.2 | 0.07 | 1.1 | S | 68 | 1022 |
| 17:00 | 21:00 | 30.5 | 34.8 | 0.01 | 2 | SSW | 68 | 1022 |
| 18:00 | 22:00 | 29.2 | 33.9 | 0 | 1.2 | S | 72 | 1022 |
| 19:00 | 23:00 | 28.5 | 33 | 0 | 1.3 | SSE | 74 | 1022 |
| 20:00 | 00:00 | 27.3 | 31.2 | 0 | 1.3 | SE | 74 | 1022 |
| 21:00 | 01:00 | 26.3 | 30.5 | 0 | 0.6 | S | 77 | 1023 |
| 22:00 | 02:00 | 25.5 | 28.9 | 0 | 1.8 | SSE | 81 | 1023 |
| 23:00 | 03:00 | 24.7 | 28.7 | 0 | 1.7 | SE | 91 | 1023 |
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 2 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.