Aspen
United States · 20 May 2018
Average
3.5°C
low -1.6°C · high 9.4°C
Rainfall
3.1mm
rain recorded
Wind
2.2m/s
daily average
Humidity
72.5%
daily average
Cloud
60%
cover
Pressure
1017hPa
daily average
The temperature ranged from -1.6°C around 03:00 to 9.4°C around 14:00. Rain was recorded across 6 hours, from around 15:00 to 20:00 (3.1mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
44th percentile
Low temperature
72th percentile
Rainfall
79th percentile
Wind
53th 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 3.2°C, versus 3.5°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 | 0.5°C | -3.3°C | 0 | 2.5 | SE | 93 | 1019 |
| 01:00 | 07:00 | 0°C | -3.9°C | 0 | 2.5 | SE | 93 | 1019 |
| 02:00 | 08:00 | -0.1°C | -4.1°C | 0 | 2.5 | SE | 92 | 1019 |
| 03:00 | 09:00 | -1.6°C | -5.8°C | 0 | 2.7 | SE | 97 | 1020 |
| 04:00 | 10:00 | -0.5°C | -4.1°C | 0 | 2.2 | SE | 96 | 1020 |
| 05:00 | 11:00 | -0.8°C | -4.6°C | 0 | 2.3 | SE | 95 | 1019 |
| 06:00 | 12:00 | -1°C | -4.9°C | 0 | 2.4 | SE | 93 | 1019 |
| 07:00 | 13:00 | -0.4°C | -4.3°C | 0 | 2.3 | SSE | 91 | 1019 |
| 08:00 | 14:00 | 2.6°C | -0.9°C | 0 | 1.9 | SSE | 78 | 1020 |
| 09:00 | 15:00 | 6.2°C | 2.9°C | 0 | 1.4 | S | 55 | 1018 |
| 10:00 | 16:00 | 7.7°C | 4.3°C | 0.05 | 1.4 | WSW | 46 | 1017 |
| 11:00 | 17:00 | 9.2°C | 5°C | 0.01 | 2.4 | WSW | 38 | 1016 |
| 12:00 | 18:00 | 9.3°C | 5°C | 0.01 | 2.8 | WSW | 41 | 1015 |
| 13:00 | 19:00 | 9.3°C | 5.1°C | 0.05 | 2.7 | WSW | 43 | 1014 |
| 14:00 | 20:00 | 9.4°C | 5.4°C | 0.09 | 2.6 | W | 45 | 1014 |
| 15:00 | 21:00 | 8.4°C | 4.5°C | 0.1 | 2.4 | W | 48 | 1014 |
| 16:00 | 22:00 | 7.5°C | 3.8°C | 0.12 | 2.1 | WSW | 53 | 1015 |
| 17:00 | 23:00 | 5.1°C | 1.3°C | 1.17 | 2.2 | SW | 65 | 1015 |
| 18:00 | 00:00 | 4.6°C | 0.9°C | 0.51 | 2.2 | SSW | 64 | 1016 |
| 19:00 | 01:00 | 3.9°C | 0.7°C | 0.73 | 1.5 | SE | 72 | 1017 |
| 20:00 | 02:00 | 3°C | -0.6°C | 0.23 | 2.2 | ESE | 78 | 1017 |
| 21:00 | 03:00 | 1.9°C | -1.4°C | 0.01 | 1.8 | SE | 85 | 1017 |
| 22:00 | 04:00 | 0.5°C | -3.4°C | 0 | 2.3 | SE | 85 | 1017 |
| 23:00 | 05:00 | -0.7°C | -4.9°C | 0 | 2.7 | SE | 92 | 1017 |
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
- 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 2018 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.