Home / Roy / 23 September 2018
Roy
United States · 23 September 2018
← 22 September 201824 September 2018 →
Average
19.6°C
low 13° · high 24.5°
Rainfall
0mm
dry day
Wind
2.7m/s
daily average
Humidity
27.9%
daily average
Cloud
49%
cover
Pressure
1009hPa
daily average
The temperature ranged from 13°C around 23:00 to 24.5°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
66th percentile
Low temperature
88th percentile
Rainfall
65th percentile
Wind
90th 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 15.7°C, versus 19.6°C on this specific day.
Sun & daylight
Sunrise
07:16
Sunset
19:23
Day length
12h 7m
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 | 17.2 | 11.9 | 0 | 4.3 | SE | 28 | 1008 |
| 01:00 | 07:00 | 17.7 | 12.6 | 0 | 4.1 | SE | 27 | 1008 |
| 02:00 | 08:00 | 17.8 | 13 | 0 | 3.7 | SE | 27 | 1008 |
| 03:00 | 09:00 | 16.8 | 12.6 | 0 | 3 | SSE | 31 | 1008 |
| 04:00 | 10:00 | 15.6 | 11.8 | 0 | 2.8 | SSE | 36 | 1009 |
| 05:00 | 11:00 | 15.6 | 12 | 0 | 2.5 | SSE | 36 | 1010 |
| 06:00 | 12:00 | 15.3 | 11.9 | 0 | 2.2 | SE | 38 | 1010 |
| 07:00 | 13:00 | 14.6 | 11.3 | 0 | 2.1 | SE | 40 | 1010 |
| 08:00 | 14:00 | 14.8 | 11.6 | 0 | 2.1 | SE | 43 | 1010 |
| 09:00 | 15:00 | 18.4 | 15.5 | 0 | 1.8 | SE | 33 | 1011 |
| 10:00 | 16:00 | 22 | 19.3 | 0 | 1.9 | SSW | 30 | 1011 |
| 11:00 | 17:00 | 23.9 | 20.3 | 0 | 3 | SW | 25 | 1011 |
| 12:00 | 18:00 | 24.2 | 19.9 | 0 | 3.7 | SW | 23 | 1010 |
| 13:00 | 19:00 | 24.2 | 19.8 | 0 | 3.8 | WSW | 23 | 1010 |
| 14:00 | 20:00 | 24.2 | 20 | 0 | 3.5 | WSW | 23 | 1009 |
| 15:00 | 21:00 | 24.5 | 20.4 | 0 | 3.2 | W | 21 | 1008 |
| 16:00 | 22:00 | 24.1 | 19.9 | 0 | 2.8 | NW | 18 | 1008 |
| 17:00 | 23:00 | 23.6 | 19.4 | 0 | 2.7 | NNW | 18 | 1007 |
| 18:00 | 00:00 | 23.4 | 19.8 | 0 | 1.8 | NNW | 18 | 1007 |
| 19:00 | 01:00 | 22.3 | 19.9 | 0 | 0.7 | ENE | 23 | 1006 |
| 20:00 | 02:00 | 20 | 17.3 | 0 | 0.9 | ESE | 25 | 1006 |
| 21:00 | 03:00 | 18.6 | 16.1 | 0 | 0.6 | NW | 27 | 1007 |
| 22:00 | 04:00 | 19 | 14.5 | 0 | 3.2 | NNW | 24 | 1008 |
| 23:00 | 05:00 | 13 | 7.9 | 0 | 4.1 | NNW | 36 | 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
- 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 23 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.