Home / Aurora / 22 September 2017
Aurora
United States · 22 September 2017
← 21 September 201723 September 2017 →
Average
21°C
low 13.7° · high 27.9°
Rainfall
0.1mm
dry day
Wind
3.8m/s
daily average
Humidity
25.1%
daily average
Cloud
25%
cover
Pressure
1003hPa
daily average
The temperature ranged from 13.7°C around 07:00 to 27.9°C around 14:00. 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
48th percentile
Low temperature
79th percentile
Rainfall
74th percentile
Wind
95th 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 18.9°C, versus 21°C on this specific day.
Sun & daylight
Sunrise
06:46
Sunset
18:55
Day length
12h 9m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Denver.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 06:00 | 22.5 | 15.5 | 0 | 6.1 | S | 14 | 998 |
| 01:00 | 07:00 | 20.8 | 14 | 0 | 5.9 | S | 16 | 999 |
| 02:00 | 08:00 | 19.7 | 13.1 | 0 | 5.6 | S | 17 | 1000 |
| 03:00 | 09:00 | 19.3 | 12.7 | 0 | 5.8 | S | 20 | 1000 |
| 04:00 | 10:00 | 19 | 12.9 | 0 | 5.8 | S | 27 | 1000 |
| 05:00 | 11:00 | 17.6 | 13.8 | 0 | 2.3 | SW | 27 | 1002 |
| 06:00 | 12:00 | 16.5 | 13.4 | 0 | 1.3 | N | 30 | 1004 |
| 07:00 | 13:00 | 13.7 | 10.4 | 0 | 1.2 | NE | 31 | 1006 |
| 08:00 | 14:00 | 15.7 | 12.8 | 0 | 1.1 | ENE | 32 | 1006 |
| 09:00 | 15:00 | 19.9 | 17.1 | 0 | 0.6 | ENE | 21 | 1006 |
| 10:00 | 16:00 | 22.8 | 20 | 0 | 0.8 | E | 19 | 1005 |
| 11:00 | 17:00 | 25.2 | 21.5 | 0 | 2.1 | ESE | 17 | 1003 |
| 12:00 | 18:00 | 26.6 | 22.8 | 0 | 2.4 | ESE | 17 | 1001 |
| 13:00 | 19:00 | 27.4 | 23.7 | 0 | 2.3 | SSE | 16 | 1000 |
| 14:00 | 20:00 | 27.9 | 22.4 | 0 | 5.1 | SSW | 17 | 999 |
| 15:00 | 21:00 | 26.9 | 20.4 | 0.02 | 6.4 | SW | 17 | 998 |
| 16:00 | 22:00 | 25.9 | 20.4 | 0.04 | 5.4 | NW | 21 | 1001 |
| 17:00 | 23:00 | 24.7 | 18.9 | 0 | 5.7 | NNW | 22 | 1003 |
| 18:00 | 00:00 | 23.3 | 17.3 | 0 | 5.7 | N | 22 | 1004 |
| 19:00 | 01:00 | 21.4 | 15.8 | 0 | 5.2 | NNE | 24 | 1005 |
| 20:00 | 02:00 | 19.6 | 14.8 | 0 | 4.2 | NNE | 28 | 1007 |
| 21:00 | 03:00 | 16.8 | 12.7 | 0 | 3.8 | NNE | 41 | 1009 |
| 22:00 | 04:00 | 15.8 | 12.2 | 0 | 3.7 | N | 49 | 1010 |
| 23:00 | 05:00 | 15.2 | 11.6 | 0 | 3.9 | N | 55 | 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 22 September 2017 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 (2026-07-17). 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 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Aurora, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 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 2026-07-17},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.