Home / Firestone / 21 May 2018
Firestone
United States · 21 May 2018
Average
15.3°C
low 5.7°C · high 23.6°C
Rainfall
0mm
dry day
Wind
1.7m/s
daily average
Humidity
65%
daily average
Cloud
49%
cover
Pressure
1011hPa
daily average
The temperature ranged from 5.7°C around 06:00 to 23.6°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
67th percentile
Low temperature
24th percentile
Rainfall
25th percentile
Wind
16th 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 13.9°C, versus 15.3°C on this specific day.
Sun & daylight
Sunrise
05:39
Sunset
20:14
Day length
14h 34m
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 | 8.6°C | 7.4°C | 0 | 0.8 | WSW | 92 | 1015 |
| 01:00 | 07:00 | 8.8°C | 7.7°C | 0 | 0.6 | SSW | 89 | 1015 |
| 02:00 | 08:00 | 8.3°C | 7.1°C | 0 | 0.6 | SW | 89 | 1014 |
| 03:00 | 09:00 | 6.9°C | 5.5°C | 0 | 0.6 | WSW | 91 | 1014 |
| 04:00 | 10:00 | 6°C | 3.1°C | 0 | 2.7 | WSW | 95 | 1016 |
| 05:00 | 11:00 | 5.8°C | 3°C | 0 | 2.5 | W | 95 | 1015 |
| 06:00 | 12:00 | 5.7°C | 3.1°C | 0 | 2.1 | WSW | 95 | 1014 |
| 07:00 | 13:00 | 6.7°C | 4.6°C | 0 | 1.9 | WSW | 99 | 1014 |
| 08:00 | 14:00 | 10°C | 8.6°C | 0 | 1 | WSW | 85 | 1014 |
| 09:00 | 15:00 | 14.3°C | 13.3°C | 0 | 0.5 | WSW | 63 | 1014 |
| 10:00 | 16:00 | 16.5°C | 16°C | 0 | 0.1 | SSW | 58 | 1012 |
| 11:00 | 17:00 | 20°C | 19.5°C | 0 | 0.7 | ENE | 52 | 1011 |
| 12:00 | 18:00 | 20.9°C | 19.6°C | 0 | 2 | NE | 49 | 1011 |
| 13:00 | 19:00 | 22.4°C | 20.6°C | 0 | 3 | ENE | 48 | 1010 |
| 14:00 | 20:00 | 23.5°C | 21.6°C | 0 | 3 | E | 44 | 1009 |
| 15:00 | 21:00 | 23.6°C | 23°C | 0.01 | 0.3 | S | 37 | 1009 |
| 16:00 | 22:00 | 22.3°C | 18.9°C | 0.01 | 2.9 | SSW | 30 | 1007 |
| 17:00 | 23:00 | 23.6°C | 20.4°C | 0 | 2.5 | SE | 27 | 1007 |
| 18:00 | 00:00 | 23.4°C | 19.9°C | 0 | 2.9 | SSE | 26 | 1008 |
| 19:00 | 01:00 | 21.9°C | 20.3°C | 0 | 2.8 | SW | 50 | 1009 |
| 20:00 | 02:00 | 20.3°C | 18.2°C | 0 | 2.2 | W | 43 | 1009 |
| 21:00 | 03:00 | 16.6°C | 15.3°C | 0 | 1.5 | NW | 61 | 1009 |
| 22:00 | 04:00 | 15.5°C | 14.5°C | 0 | 1.5 | WNW | 68 | 1009 |
| 23:00 | 05:00 | 14.5°C | 13.2°C | 0 | 1.7 | WNW | 72 | 1009 |
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
- Firestone — 40.000°, -105.000°, ERA5 grid cell center, 13.6 km from requested point
- Time zone
- America/Denver
- What's shown here
- The hourly and daily record for 21 May 2018 specifically — not a monthly average. See the Firestone 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 (2026-07-19). Historical climate data for Firestone, United States (40.00°N, 105.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Firestone, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 19, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Firestone, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 19, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Firestone, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-19},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.