Home / Chapel Hill / 17 September 2020
Chapel Hill
United States · 17 September 2020
← 16 September 202018 September 2020 →
Average
20.3°C
low 19° · high 21.1°
Rainfall
103.2mm
rain recorded
Wind
3.4m/s
daily average
Humidity
93.6%
daily average
Cloud
100%
cover
Pressure
1013hPa
daily average
The temperature ranged from 19°C around 23:00 to 21.1°C around 00:00. Rain was recorded across 22 hours, from around 02:00 to 23:00 (103.2mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
2th percentile
Low temperature
47th percentile
Rainfall
100th percentile
Wind
84th 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 22.7°C, versus 20.3°C on this specific day.
Sun & daylight
Sunrise
07:00
Sunset
19:19
Day length
12h 19m
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 | 21.1 | 22.6 | 0.01 | 2.3 | NE | 88 | 1019 |
| 01:00 | 05:00 | 20.9 | 22.5 | 0.03 | 2.4 | ENE | 89 | 1018 |
| 02:00 | 06:00 | 21 | 22.5 | 0.21 | 2.4 | ENE | 88 | 1018 |
| 03:00 | 07:00 | 20.8 | 22.2 | 0.95 | 2.3 | ENE | 87 | 1017 |
| 04:00 | 08:00 | 20.6 | 21.8 | 0.98 | 2.6 | ENE | 87 | 1016 |
| 05:00 | 09:00 | 20.4 | 21.4 | 0.62 | 2.7 | ENE | 87 | 1016 |
| 06:00 | 10:00 | 20 | 21.3 | 0.92 | 2.7 | E | 94 | 1016 |
| 07:00 | 11:00 | 19.8 | 21.2 | 1.26 | 2.7 | E | 95 | 1015 |
| 08:00 | 12:00 | 20 | 21.5 | 1.35 | 2.7 | E | 96 | 1015 |
| 09:00 | 13:00 | 19.9 | 21.2 | 1.76 | 2.9 | E | 95 | 1015 |
| 10:00 | 14:00 | 19.9 | 21.1 | 1.59 | 2.9 | E | 95 | 1015 |
| 11:00 | 15:00 | 20.2 | 21.8 | 1.16 | 2.6 | E | 95 | 1015 |
| 12:00 | 16:00 | 20.1 | 21.3 | 1.49 | 3.1 | E | 95 | 1014 |
| 13:00 | 17:00 | 20.4 | 21.5 | 1.38 | 3.3 | E | 94 | 1014 |
| 14:00 | 18:00 | 20.3 | 21.7 | 1.5 | 2.9 | ENE | 95 | 1013 |
| 15:00 | 19:00 | 20.6 | 21.5 | 1.59 | 3.8 | ENE | 95 | 1012 |
| 16:00 | 20:00 | 20.3 | 20.7 | 2.46 | 4.5 | ENE | 96 | 1011 |
| 17:00 | 21:00 | 20.4 | 20.6 | 3.55 | 5.1 | ENE | 97 | 1011 |
| 18:00 | 22:00 | 21 | 22.4 | 3.88 | 3.7 | E | 97 | 1010 |
| 19:00 | 23:00 | 20.7 | 21.6 | 5.69 | 4 | ENE | 97 | 1009 |
| 20:00 | 00:00 | 20.2 | 20.8 | 10.7 | 4.2 | ENE | 96 | 1009 |
| 21:00 | 01:00 | 19.7 | 19.8 | 18.27 | 4.4 | NE | 96 | 1009 |
| 22:00 | 02:00 | 19.3 | 18.9 | 23.09 | 5 | NE | 96 | 1009 |
| 23:00 | 03:00 | 19 | 18.1 | 18.79 | 5.5 | NNE | 96 | 1009 |
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
- Chapel Hill — 36.000°, -79.000°, ERA5 grid cell center, 10.9 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 17 September 2020 specifically — not a monthly average. See the Chapel Hill 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 (2026-07-16). Historical climate data for Chapel Hill, United States (36.00°N, 79.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Chapel Hill, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 16, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Chapel Hill, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 16, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Chapel Hill, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-16},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.