Aspen
United States · 20 May 2017
Average
-1.3°C
low -7.6°C · high 4.3°C
Rainfall
0.5mm
dry day
Wind
2m/s
daily average
Humidity
66.6%
daily average
Cloud
64%
cover
Pressure
1021hPa
daily average
The temperature ranged from -7.6°C around 07:00 to 4.3°C around 16:00. 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
7th percentile
Low temperature
0th percentile
Rainfall
54th 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 3.6°C, versus -1.3°C on this specific day.
Sun & daylight
Sunrise
05:49
Sunset
20:18
Day length
14h 29m
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 | -4.4°C | -8.3°C | 0.01 | 1.6 | W | 86 | 1022 |
| 01:00 | 07:00 | -4.5°C | -8.1°C | 0.03 | 1.2 | W | 87 | 1023 |
| 02:00 | 08:00 | -4.5°C | -8.1°C | 0.03 | 1.3 | W | 88 | 1023 |
| 03:00 | 09:00 | -5.7°C | -9.3°C | 0.03 | 1.1 | W | 88 | 1023 |
| 04:00 | 10:00 | -7.2°C | -10.9°C | 0.03 | 1.1 | SW | 95 | 1022 |
| 05:00 | 11:00 | -7.5°C | -11.1°C | 0.03 | 1.1 | WSW | 96 | 1023 |
| 06:00 | 12:00 | -6.9°C | -10.3°C | 0.03 | 0.7 | SW | 96 | 1023 |
| 07:00 | 13:00 | -7.6°C | -11.1°C | 0.02 | 0.9 | W | 93 | 1024 |
| 08:00 | 14:00 | -5.2°C | -9.2°C | 0.02 | 1.6 | WNW | 81 | 1024 |
| 09:00 | 15:00 | -1.2°C | -5.9°C | 0.01 | 2.7 | WNW | 61 | 1023 |
| 10:00 | 16:00 | -0.3°C | -5.6°C | 0.01 | 3.3 | NW | 56 | 1021 |
| 11:00 | 17:00 | 1.2°C | -4.1°C | 0.01 | 3.5 | NW | 48 | 1019 |
| 12:00 | 18:00 | 1.8°C | -3.7°C | 0.01 | 3.5 | NW | 45 | 1019 |
| 13:00 | 19:00 | 2.3°C | -3.2°C | 0.03 | 3.6 | NW | 44 | 1019 |
| 14:00 | 20:00 | 3°C | -2.5°C | 0.04 | 3.7 | WNW | 44 | 1018 |
| 15:00 | 21:00 | 3.5°C | -1.9°C | 0.04 | 3.7 | WNW | 45 | 1018 |
| 16:00 | 22:00 | 4.3°C | -0.9°C | 0.04 | 3.3 | NW | 41 | 1020 |
| 17:00 | 23:00 | 3.9°C | -1.1°C | 0.04 | 3.1 | NW | 44 | 1020 |
| 18:00 | 00:00 | 3.6°C | -1°C | 0.02 | 2.7 | WNW | 48 | 1019 |
| 19:00 | 01:00 | 3°C | -0.9°C | 0 | 1.9 | WNW | 53 | 1020 |
| 20:00 | 02:00 | 2.1°C | -1.7°C | 0 | 1.5 | WNW | 53 | 1020 |
| 21:00 | 03:00 | -0.8°C | -4.1°C | 0 | 0.7 | WSW | 65 | 1021 |
| 22:00 | 04:00 | -2.2°C | -5.3°C | 0 | 0.4 | S | 71 | 1022 |
| 23:00 | 05:00 | -1.8°C | -5.3°C | 0 | 1.1 | SE | 72 | 1022 |
Nearby cities
Need this verified for an official or legal purpose? Request a weather verification report.
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
- Aspen — 39.250°, -106.750°, ERA5 grid cell center, 8.8 km from requested point
- Time zone
- America/Denver
- What's shown here
- The hourly and daily record for 20 May 2017 specifically — not a monthly average. See the Aspen 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 Aspen, United States (39.25°N, 106.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Aspen, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Aspen, 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 Aspen, 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.