Home / Roy / 22 September 2018
Roy
United States · 22 September 2018
← 21 September 201823 September 2018 →
Average
18.6°C
low 9.6° · high 27.2°
Rainfall
0mm
dry day
Wind
2.4m/s
daily average
Humidity
26.5%
daily average
Cloud
8%
cover
Pressure
1013hPa
daily average
The temperature ranged from 9.6°C around 07:00 to 27.2°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
85th percentile
Low temperature
56th percentile
Rainfall
65th percentile
Wind
81th 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 15.9°C, versus 18.6°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 °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 06:00 | 13 | 9 | 0 | 2.5 | E | 35 | 1015 |
| 01:00 | 07:00 | 12.7 | 8.7 | 0 | 2.6 | E | 36 | 1015 |
| 02:00 | 08:00 | 12.2 | 8.1 | 0 | 2.7 | E | 39 | 1014 |
| 03:00 | 09:00 | 11.8 | 7.9 | 0 | 2.7 | E | 43 | 1014 |
| 04:00 | 10:00 | 11.2 | 7.3 | 0 | 2 | E | 33 | 1015 |
| 05:00 | 11:00 | 10.4 | 6.5 | 0 | 2 | E | 36 | 1015 |
| 06:00 | 12:00 | 10.5 | 6.5 | 0 | 2 | E | 36 | 1015 |
| 07:00 | 13:00 | 9.6 | 5.7 | 0 | 1.8 | E | 35 | 1015 |
| 08:00 | 14:00 | 11.6 | 7.7 | 0 | 1.9 | E | 32 | 1015 |
| 09:00 | 15:00 | 16.2 | 12.3 | 0 | 2.2 | ESE | 27 | 1015 |
| 10:00 | 16:00 | 20 | 16.2 | 0 | 2 | SSE | 20 | 1016 |
| 11:00 | 17:00 | 23 | 18.7 | 0 | 2.9 | SSW | 18 | 1015 |
| 12:00 | 18:00 | 24.4 | 19.9 | 0 | 3.3 | SSW | 18 | 1015 |
| 13:00 | 19:00 | 25.3 | 20.9 | 0 | 3.3 | SW | 18 | 1014 |
| 14:00 | 20:00 | 26 | 21.7 | 0 | 3.2 | SW | 18 | 1013 |
| 15:00 | 21:00 | 27 | 22.9 | 0 | 2.9 | SW | 17 | 1012 |
| 16:00 | 22:00 | 27.2 | 23.3 | 0 | 2.4 | WSW | 15 | 1011 |
| 17:00 | 23:00 | 27.1 | 23.8 | 0 | 1.7 | WSW | 16 | 1010 |
| 18:00 | 00:00 | 26.6 | 23.6 | 0 | 1.2 | W | 16 | 1010 |
| 19:00 | 01:00 | 26.9 | 23.9 | 0 | 1.1 | NNW | 15 | 1010 |
| 20:00 | 02:00 | 23.2 | 20.1 | 0 | 1.6 | ENE | 21 | 1009 |
| 21:00 | 03:00 | 17.9 | 14.3 | 0 | 2.5 | ESE | 31 | 1009 |
| 22:00 | 04:00 | 16.9 | 12.4 | 0 | 3.4 | ESE | 30 | 1009 |
| 23:00 | 05:00 | 16.7 | 12 | 0 | 3.7 | ESE | 31 | 1008 |
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
- 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 2018 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 (2026-07-18). 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 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Roy, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 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 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.