Home / Roy / 25 September 2018
Roy
United States · 25 September 2018
← 24 September 201826 September 2018 →
Average
11.8°C
low 3.2°C · high 19°C
Rainfall
0mm
dry day
Wind
1.8m/s
daily average
Humidity
34.4%
daily average
Cloud
8%
cover
Pressure
1020hPa
daily average
The temperature ranged from 3.2°C around 04:00 to 19°C around 17:00. 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
25th percentile
Low temperature
7th percentile
Rainfall
63th percentile
Wind
59th 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 15.1°C, versus 11.8°C on this specific day.
Sun & daylight
Sunrise
07:18
Sunset
19:19
Day length
12h 1m
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 | 9.2°C | 5.1°C | 0 | 2.4 | NNE | 41 | 1017 |
| 01:00 | 07:00 | 8.1°C | 3.9°C | 0 | 2.5 | NNE | 42 | 1018 |
| 02:00 | 08:00 | 6.1°C | 1.8°C | 0 | 2.4 | NE | 45 | 1018 |
| 03:00 | 09:00 | 5°C | 1.1°C | 0 | 2.3 | NE | 58 | 1018 |
| 04:00 | 10:00 | 3.2°C | -1.3°C | 0 | 2.7 | ENE | 52 | 1020 |
| 05:00 | 11:00 | 3.5°C | -0.8°C | 0 | 2.3 | ENE | 54 | 1020 |
| 06:00 | 12:00 | 4°C | 0.1°C | 0 | 2 | ENE | 57 | 1021 |
| 07:00 | 13:00 | 4.1°C | 0.4°C | 0 | 1.8 | ENE | 57 | 1021 |
| 08:00 | 14:00 | 5.2°C | 1.3°C | 0 | 1.9 | ENE | 51 | 1022 |
| 09:00 | 15:00 | 9.6°C | 5.6°C | 0 | 1.8 | ENE | 30 | 1022 |
| 10:00 | 16:00 | 12.3°C | 8.5°C | 0 | 1.2 | ENE | 22 | 1022 |
| 11:00 | 17:00 | 15.4°C | 12.4°C | 0 | 0.2 | N | 20 | 1022 |
| 12:00 | 18:00 | 16.5°C | 12.9°C | 0 | 1.3 | W | 21 | 1021 |
| 13:00 | 19:00 | 17.1°C | 12.8°C | 0 | 2.4 | WNW | 21 | 1021 |
| 14:00 | 20:00 | 17.9°C | 13.3°C | 0 | 2.8 | WNW | 20 | 1020 |
| 15:00 | 21:00 | 18.6°C | 13.9°C | 0 | 2.9 | WNW | 18 | 1019 |
| 16:00 | 22:00 | 18.9°C | 14.6°C | 0 | 2.3 | WNW | 18 | 1018 |
| 17:00 | 23:00 | 19°C | 14.7°C | 0 | 2.2 | WNW | 18 | 1018 |
| 18:00 | 00:00 | 18.5°C | 14.4°C | 0 | 1.9 | WNW | 19 | 1018 |
| 19:00 | 01:00 | 16.6°C | 13.1°C | 0 | 1.8 | W | 29 | 1018 |
| 20:00 | 02:00 | 15.4°C | 12.1°C | 0 | 1.4 | W | 27 | 1019 |
| 21:00 | 03:00 | 13.5°C | 10.4°C | 0 | 1.1 | W | 34 | 1019 |
| 22:00 | 04:00 | 13.2°C | 10.7°C | 0 | 0.3 | NE | 35 | 1020 |
| 23:00 | 05:00 | 11.2°C | 8.8°C | 0 | 0.1 | E | 37 | 1020 |
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 25 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 (2026-07-19). 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.