Home / Roy / 22 September 2017
Roy
United States · 22 September 2017
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Average
6.3°C
low 4.4°C · high 8.6°C
Rainfall
4.8mm
rain recorded
Wind
1.2m/s
daily average
Humidity
87.9%
daily average
Cloud
76%
cover
Pressure
1012hPa
daily average
The temperature ranged from 4.4°C around 00:00 to 8.6°C around 15:00. Rain was recorded across 13 hours, from around 00:00 to 19:00 (4.8mm 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
7th percentile
Rainfall
91th percentile
Wind
1th 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 16.6°C, versus 6.3°C on this specific day.
Sun & daylight
Sunrise
07:15
Sunset
19:24
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 | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 06:00 | 4.4°C | 2.2°C | 0.18 | 1.2 | WSW | 98 | 1011 |
| 01:00 | 07:00 | 4.5°C | 2.7°C | 0.27 | 0.8 | WNW | 97 | 1011 |
| 02:00 | 08:00 | 4.9°C | 3.4°C | 0.14 | 0.4 | NNW | 96 | 1011 |
| 03:00 | 09:00 | 4.8°C | 3.1°C | 0.05 | 0.5 | NNW | 95 | 1011 |
| 04:00 | 10:00 | 5.1°C | 3°C | 0.06 | 0.9 | E | 91 | 1011 |
| 05:00 | 11:00 | 5.4°C | 3.6°C | 0.09 | 0.6 | SE | 92 | 1011 |
| 06:00 | 12:00 | 5.5°C | 3.7°C | 0.17 | 0.8 | W | 91 | 1011 |
| 07:00 | 13:00 | 5.1°C | 2.7°C | 0.37 | 1.6 | W | 92 | 1011 |
| 08:00 | 14:00 | 5.6°C | 3°C | 0.55 | 2 | W | 95 | 1013 |
| 09:00 | 15:00 | 5.2°C | 2.7°C | 0.73 | 1.8 | WSW | 95 | 1014 |
| 10:00 | 16:00 | 4.8°C | 2.7°C | 0.69 | 1.1 | W | 94 | 1014 |
| 11:00 | 17:00 | 5.8°C | 3.9°C | 0.42 | 0.9 | WNW | 90 | 1014 |
| 12:00 | 18:00 | 7°C | 5.3°C | 0.14 | 1.1 | W | 93 | 1013 |
| 13:00 | 19:00 | 7.5°C | 5.6°C | 0.07 | 1.3 | W | 88 | 1013 |
| 14:00 | 20:00 | 8.1°C | 5.8°C | 0.12 | 1.7 | WSW | 82 | 1012 |
| 15:00 | 21:00 | 8.6°C | 5.9°C | 0.14 | 2 | WSW | 77 | 1012 |
| 16:00 | 22:00 | 8.4°C | 6.2°C | 0.06 | 1.5 | NW | 77 | 1011 |
| 17:00 | 23:00 | 8.2°C | 5.9°C | 0.05 | 1.5 | WNW | 77 | 1011 |
| 18:00 | 00:00 | 8.2°C | 5.9°C | 0.05 | 1.6 | W | 79 | 1012 |
| 19:00 | 01:00 | 7.7°C | 5.9°C | 0.42 | 0.9 | W | 80 | 1013 |
| 20:00 | 02:00 | 7.4°C | 5.3°C | 0.01 | 1.1 | W | 78 | 1014 |
| 21:00 | 03:00 | 6.6°C | 4.7°C | 0 | 0.8 | WNW | 82 | 1014 |
| 22:00 | 04:00 | 6.3°C | 4.2°C | 0 | 1 | N | 84 | 1014 |
| 23:00 | 05:00 | 5.4°C | 3°C | 0 | 1.4 | NNE | 88 | 1014 |
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
- Roy — 41.250°, -112.000°, ERA5 grid cell center, 10.1 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 Roy 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 Roy, United States (41.25°N, 112.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Roy, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 19, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Roy, 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 Roy, 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.