Home / Cornwall / 4 September 2024
Cornwall
United States · 4 September 2024
← 3 September 20245 September 2024 →
Average
16.9°C
low 9.3° · high 25°
Rainfall
0mm
dry day
Wind
1.5m/s
daily average
Humidity
66.4%
daily average
Cloud
1%
cover
Pressure
1029hPa
daily average
The temperature ranged from 9.3°C around 07:00 to 25°C around 17:00. 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
27th percentile
Low temperature
0th percentile
Rainfall
49th percentile
Wind
10th 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 16.9°C on this specific day.
Sun & daylight
Sunrise
06:36
Sunset
19:31
Day length
12h 55m
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 | 12.9 | 11.6 | 0 | 1.8 | NNE | 81 | 1029 |
| 01:00 | 05:00 | 10.9 | 9.6 | 0 | 1.7 | NE | 90 | 1028 |
| 02:00 | 06:00 | 10.5 | 9.1 | 0 | 1.6 | NE | 91 | 1029 |
| 03:00 | 07:00 | 9.9 | 8.5 | 0 | 1.5 | ENE | 91 | 1029 |
| 04:00 | 08:00 | 9.8 | 8.2 | 0 | 1.5 | ENE | 89 | 1029 |
| 05:00 | 09:00 | 9.4 | 8 | 0 | 1.3 | ENE | 90 | 1029 |
| 06:00 | 10:00 | 9.7 | 8.3 | 0 | 1.2 | NE | 88 | 1030 |
| 07:00 | 11:00 | 9.3 | 7.8 | 0 | 1.3 | NE | 89 | 1030 |
| 08:00 | 12:00 | 11.2 | 10 | 0 | 1.4 | NNE | 86 | 1031 |
| 09:00 | 13:00 | 14.4 | 13.9 | 0 | 0.7 | NE | 75 | 1031 |
| 10:00 | 14:00 | 17.9 | 17.7 | 0 | 0.6 | ENE | 62 | 1031 |
| 11:00 | 15:00 | 20.5 | 20.1 | 0 | 0.9 | E | 52 | 1031 |
| 12:00 | 16:00 | 22.2 | 21.2 | 0 | 1.3 | ESE | 45 | 1031 |
| 13:00 | 17:00 | 23.4 | 22.4 | 0 | 1.3 | SE | 40 | 1031 |
| 14:00 | 18:00 | 24 | 22.8 | 0 | 1.4 | SE | 38 | 1030 |
| 15:00 | 19:00 | 24.6 | 23.3 | 0 | 1.5 | ESE | 37 | 1030 |
| 16:00 | 20:00 | 24.9 | 23.6 | 0 | 1.6 | E | 37 | 1029 |
| 17:00 | 21:00 | 25 | 23.4 | 0 | 1.9 | E | 36 | 1029 |
| 18:00 | 22:00 | 23.7 | 22.9 | 0 | 1.3 | E | 42 | 1028 |
| 19:00 | 23:00 | 22.2 | 22.1 | 0 | 1 | E | 52 | 1028 |
| 20:00 | 00:00 | 19.4 | 19.1 | 0 | 1.5 | ENE | 63 | 1028 |
| 21:00 | 01:00 | 17.8 | 17.1 | 0 | 1.9 | E | 69 | 1029 |
| 22:00 | 02:00 | 16.5 | 15.5 | 0 | 2.3 | E | 73 | 1029 |
| 23:00 | 03:00 | 16.2 | 14.8 | 0 | 2.7 | ESE | 75 | 1029 |
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 4 September 2024 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.