Home / Aurora / 21 September 2016
Aurora
United States · 21 September 2016
← 20 September 201622 September 2016 →
Average
23.1°C
low 17.5°C · high 28.5°C
Rainfall
0mm
dry day
Wind
3.1m/s
daily average
Humidity
28.2%
daily average
Cloud
73%
cover
Pressure
1011hPa
daily average
The temperature ranged from 17.5°C around 23:00 to 28.5°C around 15:00. 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
56th percentile
Low temperature
99th percentile
Rainfall
63th percentile
Wind
76th 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 18.8°C, versus 23.1°C on this specific day.
Sun & daylight
Sunrise
06:46
Sunset
18:56
Day length
12h 11m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Denver.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 06:00 | 21.7°C | 16.4°C | 0 | 4.8 | SW | 25 | 1012 |
| 01:00 | 07:00 | 21.4°C | 16°C | 0 | 5.2 | SW | 26 | 1012 |
| 02:00 | 08:00 | 21.3°C | 15.7°C | 0 | 5.7 | SW | 29 | 1012 |
| 03:00 | 09:00 | 20.7°C | 15°C | 0 | 5.6 | SW | 28 | 1012 |
| 04:00 | 10:00 | 20.3°C | 14.4°C | 0 | 6.5 | SSW | 34 | 1012 |
| 05:00 | 11:00 | 19.9°C | 15.2°C | 0 | 4.9 | SSW | 35 | 1011 |
| 06:00 | 12:00 | 19.6°C | 16.3°C | 0 | 2.7 | SW | 35 | 1011 |
| 07:00 | 13:00 | 19.2°C | 16.7°C | 0 | 1.7 | SW | 36 | 1012 |
| 08:00 | 14:00 | 19.6°C | 16.4°C | 0 | 2.3 | W | 32 | 1013 |
| 09:00 | 15:00 | 22.2°C | 18.7°C | 0 | 2.8 | WNW | 27 | 1013 |
| 10:00 | 16:00 | 24.2°C | 20.5°C | 0 | 3.3 | NW | 26 | 1013 |
| 11:00 | 17:00 | 26.3°C | 22.4°C | 0 | 3.4 | NNW | 22 | 1012 |
| 12:00 | 18:00 | 26.8°C | 23.3°C | 0 | 3 | N | 22 | 1012 |
| 13:00 | 19:00 | 27.3°C | 24.3°C | 0 | 2.4 | NNE | 22 | 1011 |
| 14:00 | 20:00 | 28.2°C | 25.8°C | 0 | 1.7 | NNE | 22 | 1011 |
| 15:00 | 21:00 | 28.5°C | 26°C | 0 | 1.4 | NNE | 20 | 1009 |
| 16:00 | 22:00 | 27°C | 24.3°C | 0 | 1.6 | NNE | 21 | 1010 |
| 17:00 | 23:00 | 26.5°C | 23.2°C | 0 | 2.4 | E | 21 | 1009 |
| 18:00 | 00:00 | 26.7°C | 23.8°C | 0 | 1.6 | SE | 20 | 1009 |
| 19:00 | 01:00 | 25.5°C | 22.8°C | 0 | 1.4 | E | 22 | 1009 |
| 20:00 | 02:00 | 23.4°C | 20.1°C | 0 | 2.6 | ESE | 26 | 1010 |
| 21:00 | 03:00 | 20.9°C | 18°C | 0 | 2.5 | ESE | 35 | 1010 |
| 22:00 | 04:00 | 18.6°C | 16.2°C | 0 | 1.9 | SE | 41 | 1010 |
| 23:00 | 05:00 | 17.5°C | 15.5°C | 0 | 1.7 | SSE | 49 | 1010 |
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
- Aurora — 39.750°, -104.750°, ERA5 grid cell center, 7.4 km from requested point
- Time zone
- America/Denver
- What's shown here
- The hourly and daily record for 21 September 2016 specifically — not a monthly average. See the Aurora 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 (2026-07-20). Historical climate data for Aurora, United States (39.75°N, 104.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Aurora, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Aurora, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 20, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Aurora, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-20},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.