Home / Key Biscayne / 11 September 2018
Key Biscayne
United States · 11 September 2018
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Average
28°C
low 26.3°C · high 29.7°C
Rainfall
1.3mm
rain recorded
Wind
1.8m/s
daily average
Humidity
80.2%
daily average
Cloud
90%
cover
Pressure
1015hPa
daily average
The temperature ranged from 26.3°C around 03:00 to 29.7°C around 15:00. Rain was recorded across 2 hours, from around 17:00 to 18:00 (1.3mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
33th percentile
Low temperature
49th percentile
Rainfall
29th 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 28°C, versus 28°C on this specific day.
Sun & daylight
Sunrise
07:05
Sunset
19:29
Day length
12h 24m
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 | 26.6°C | 30.7°C | 0 | 2.3 | N | 86 | 1016 |
| 01:00 | 05:00 | 26.5°C | 30.5°C | 0 | 2.5 | N | 85 | 1016 |
| 02:00 | 06:00 | 26.4°C | 30.4°C | 0 | 2.3 | NNE | 85 | 1015 |
| 03:00 | 07:00 | 26.3°C | 30.5°C | 0 | 2.2 | NNE | 86 | 1015 |
| 04:00 | 08:00 | 26.4°C | 30.6°C | 0 | 2.1 | N | 86 | 1015 |
| 05:00 | 09:00 | 26.4°C | 30.5°C | 0 | 2.2 | N | 86 | 1015 |
| 06:00 | 10:00 | 26.8°C | 31.3°C | 0 | 2 | NNW | 85 | 1015 |
| 07:00 | 11:00 | 26.7°C | 31.3°C | 0 | 1.7 | NNE | 85 | 1015 |
| 08:00 | 12:00 | 26.7°C | 31.7°C | 0.01 | 1.1 | NNE | 85 | 1016 |
| 09:00 | 13:00 | 27.7°C | 33°C | 0 | 1.1 | NE | 82 | 1016 |
| 10:00 | 14:00 | 28.3°C | 33.1°C | 0 | 1.7 | ENE | 79 | 1017 |
| 11:00 | 15:00 | 28.9°C | 33.5°C | 0.02 | 1.8 | E | 76 | 1017 |
| 12:00 | 16:00 | 29.1°C | 33.7°C | 0.07 | 1.8 | E | 75 | 1017 |
| 13:00 | 17:00 | 29.5°C | 34.1°C | 0.07 | 1.9 | ESE | 73 | 1016 |
| 14:00 | 18:00 | 29.7°C | 34.3°C | 0.05 | 1.9 | E | 73 | 1016 |
| 15:00 | 19:00 | 29.7°C | 34.5°C | 0.06 | 1.9 | E | 73 | 1015 |
| 16:00 | 20:00 | 29.7°C | 34.5°C | 0.03 | 1.7 | E | 74 | 1015 |
| 17:00 | 21:00 | 29.6°C | 34.2°C | 0.1 | 2 | ESE | 73 | 1014 |
| 18:00 | 22:00 | 29.4°C | 33.8°C | 0.77 | 2.6 | SSE | 76 | 1014 |
| 19:00 | 23:00 | 28.8°C | 33.5°C | 0.08 | 1.8 | SE | 77 | 1014 |
| 20:00 | 00:00 | 28.4°C | 33.6°C | 0 | 1.2 | E | 79 | 1014 |
| 21:00 | 01:00 | 28.1°C | 33.4°C | 0 | 1 | NE | 80 | 1015 |
| 22:00 | 02:00 | 27.9°C | 33.5°C | 0 | 0.7 | NNW | 81 | 1015 |
| 23:00 | 03:00 | 27.6°C | 33.1°C | 0 | 1 | NNW | 83 | 1015 |
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
- Key Biscayne — 25.750°, -80.250°, ERA5 grid cell center, 10.7 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 11 September 2018 specifically — not a monthly average. See the Key Biscayne 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 (2026-07-21). Historical climate data for Key Biscayne, United States (25.75°N, 80.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Key Biscayne, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Key Biscayne, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Key Biscayne, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.