Home / Keystone / 23 September 2016
Keystone
United States · 23 September 2016
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Average
27.7°C
low 23°C · high 32.4°C
Rainfall
0.4mm
dry day
Wind
1.5m/s
daily average
Humidity
77.5%
daily average
Cloud
58%
cover
Pressure
1015hPa
daily average
The temperature ranged from 23°C around 07:00 to 32.4°C around 16:00. Rain was recorded for one hour, around 18:00 (0.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
70th percentile
Low temperature
41th percentile
Rainfall
39th percentile
Wind
14th 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 26.8°C, versus 27.7°C on this specific day.
Sun & daylight
Sunrise
07:19
Sunset
19:24
Day length
12h 5m
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 | 25.6°C | 29.3°C | 0 | 2.7 | ESE | 89 | 1016 |
| 01:00 | 05:00 | 25.5°C | 29.2°C | 0 | 2.7 | SE | 89 | 1016 |
| 02:00 | 06:00 | 25°C | 28.8°C | 0 | 2.1 | SE | 90 | 1016 |
| 03:00 | 07:00 | 24.4°C | 28.4°C | 0 | 1.5 | SSE | 90 | 1015 |
| 04:00 | 08:00 | 24.5°C | 28.7°C | 0 | 1.3 | SSE | 91 | 1015 |
| 05:00 | 09:00 | 24.2°C | 28.2°C | 0 | 1.5 | SSE | 91 | 1015 |
| 06:00 | 10:00 | 23.8°C | 27.6°C | 0 | 1.4 | ESE | 91 | 1015 |
| 07:00 | 11:00 | 23°C | 26.9°C | 0 | 1 | ENE | 92 | 1015 |
| 08:00 | 12:00 | 23.7°C | 27.9°C | 0 | 0.9 | E | 92 | 1016 |
| 09:00 | 13:00 | 25.9°C | 31.3°C | 0 | 1 | ESE | 91 | 1017 |
| 10:00 | 14:00 | 27.9°C | 34.2°C | 0.01 | 0.3 | N | 85 | 1017 |
| 11:00 | 15:00 | 30.5°C | 35.4°C | 0.06 | 0.7 | NNW | 66 | 1017 |
| 12:00 | 16:00 | 31.3°C | 36.3°C | 0.06 | 0.7 | NW | 63 | 1017 |
| 13:00 | 17:00 | 31.6°C | 36°C | 0.05 | 1.1 | NW | 60 | 1016 |
| 14:00 | 18:00 | 32.1°C | 36.3°C | 0.03 | 1.5 | WNW | 59 | 1016 |
| 15:00 | 19:00 | 32.1°C | 36°C | 0.02 | 1.7 | WNW | 57 | 1015 |
| 16:00 | 20:00 | 32.4°C | 36°C | 0 | 1.9 | NW | 56 | 1014 |
| 17:00 | 21:00 | 32°C | 35.3°C | 0.01 | 2.4 | NW | 57 | 1014 |
| 18:00 | 22:00 | 31°C | 35.1°C | 0.11 | 2.3 | WNW | 66 | 1014 |
| 19:00 | 23:00 | 29.7°C | 34.7°C | 0 | 1 | NW | 70 | 1014 |
| 20:00 | 00:00 | 28.4°C | 32.7°C | 0 | 1.8 | NW | 75 | 1015 |
| 21:00 | 01:00 | 27.7°C | 32°C | 0.02 | 1.2 | NNE | 74 | 1015 |
| 22:00 | 02:00 | 27.4°C | 31.6°C | 0 | 1.5 | ENE | 77 | 1016 |
| 23:00 | 03:00 | 26.3°C | 30°C | 0 | 2.8 | E | 86 | 1016 |
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
- Keystone — 28.250°, -82.500°, ERA5 grid cell center, 15.8 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 23 September 2016 specifically — not a monthly average. See the Keystone 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 Keystone, United States (28.25°N, 82.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Keystone, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 19, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Keystone, 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 Keystone, 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.