Home / Aurora / 25 September 2017
Aurora
United States · 25 September 2017
← 24 September 201726 September 2017 →
Average
9.4°C
low 7.1°C · high 12.3°C
Rainfall
4.3mm
rain recorded
Wind
2.3m/s
daily average
Humidity
80.8%
daily average
Cloud
74%
cover
Pressure
1017hPa
daily average
The temperature ranged from 7.1°C around 08:00 to 12.3°C around 17:00. Rain was recorded across 11 hours, from around 00:00 to 16:00 (4.3mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
0th percentile
Low temperature
13th percentile
Rainfall
96th percentile
Wind
41th 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 18.2°C, versus 9.4°C on this specific day.
Sun & daylight
Sunrise
06:49
Sunset
18:50
Day length
12h 1m
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 | 8.4°C | 5.4°C | 0.27 | 3.6 | N | 99 | 1016 |
| 01:00 | 07:00 | 8.2°C | 5.8°C | 0.03 | 2.7 | NE | 98 | 1016 |
| 02:00 | 08:00 | 8°C | 5.6°C | 0.01 | 2.7 | NE | 98 | 1016 |
| 03:00 | 09:00 | 7.8°C | 5.1°C | 0.08 | 2.7 | NE | 95 | 1016 |
| 04:00 | 10:00 | 7.6°C | 4.7°C | 0.16 | 2.8 | NNE | 89 | 1018 |
| 05:00 | 11:00 | 7.4°C | 4.8°C | 0.07 | 2.5 | NNE | 92 | 1018 |
| 06:00 | 12:00 | 7.4°C | 4.6°C | 0.09 | 2.7 | N | 93 | 1018 |
| 07:00 | 13:00 | 7.2°C | 4°C | 0.07 | 3.4 | N | 95 | 1017 |
| 08:00 | 14:00 | 7.1°C | 4°C | 0.12 | 3.1 | NNE | 94 | 1018 |
| 09:00 | 15:00 | 8.4°C | 5.7°C | 0.17 | 2.6 | NNE | 86 | 1019 |
| 10:00 | 16:00 | 8.8°C | 6.3°C | 0.28 | 2.4 | NNE | 86 | 1019 |
| 11:00 | 17:00 | 9.4°C | 6.8°C | 0.84 | 2.4 | NNE | 81 | 1018 |
| 12:00 | 18:00 | 9.8°C | 7.4°C | 0.44 | 2.1 | NNE | 79 | 1017 |
| 13:00 | 19:00 | 10.3°C | 8°C | 0.64 | 2.1 | NE | 77 | 1016 |
| 14:00 | 20:00 | 11.1°C | 8.9°C | 0.3 | 2 | ENE | 73 | 1015 |
| 15:00 | 21:00 | 11.9°C | 9.8°C | 0.48 | 1.7 | ENE | 69 | 1015 |
| 16:00 | 22:00 | 11.9°C | 10.2°C | 0.11 | 1 | ENE | 66 | 1014 |
| 17:00 | 23:00 | 12.3°C | 10.2°C | 0.01 | 1.5 | ENE | 63 | 1015 |
| 18:00 | 00:00 | 12.1°C | 9.7°C | 0.01 | 1.8 | ENE | 61 | 1015 |
| 19:00 | 01:00 | 11.9°C | 9.3°C | 0.01 | 1.8 | NE | 57 | 1015 |
| 20:00 | 02:00 | 11.1°C | 8.6°C | 0.01 | 2 | ENE | 66 | 1017 |
| 21:00 | 03:00 | 9.5°C | 7.1°C | 0.04 | 1.9 | E | 73 | 1017 |
| 22:00 | 04:00 | 9.2°C | 7.1°C | 0.06 | 1.4 | E | 74 | 1018 |
| 23:00 | 05:00 | 9°C | 6.7°C | 0.05 | 1.6 | E | 75 | 1019 |
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 25 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 (2026-07-20). 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.