Home / Roy / 21 September 2016
Roy
United States · 21 September 2016
← 20 September 201622 September 2016 →
Average
19.9°C
low 15.1°C · high 25.2°C
Rainfall
3.4mm
rain recorded
Wind
3m/s
daily average
Humidity
42%
daily average
Cloud
35%
cover
Pressure
1009hPa
daily average
The temperature ranged from 15.1°C around 23:00 to 25.2°C around 15:00. Rain was recorded across 4 hours, from around 20:00 to 23:00 (3.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
63th percentile
Low temperature
96th percentile
Rainfall
90th percentile
Wind
95th 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 16.3°C, versus 19.9°C on this specific day.
Sun & daylight
Sunrise
07:15
Sunset
19:25
Day length
12h 11m
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 | 18.3°C | 14.1°C | 0 | 3.6 | ESE | 34 | 1010 |
| 01:00 | 07:00 | 18°C | 13.9°C | 0 | 3.6 | ESE | 36 | 1010 |
| 02:00 | 08:00 | 18°C | 14°C | 0 | 3.5 | SE | 37 | 1011 |
| 03:00 | 09:00 | 17.4°C | 13.4°C | 0 | 3.5 | SE | 39 | 1011 |
| 04:00 | 10:00 | 16.2°C | 12.5°C | 0 | 3.4 | ESE | 44 | 1012 |
| 05:00 | 11:00 | 15.6°C | 11.9°C | 0 | 3.3 | ESE | 45 | 1012 |
| 06:00 | 12:00 | 15.5°C | 11.9°C | 0 | 3.3 | ESE | 47 | 1012 |
| 07:00 | 13:00 | 15.1°C | 11.5°C | 0 | 3.4 | ESE | 48 | 1012 |
| 08:00 | 14:00 | 16.1°C | 13°C | 0 | 2.5 | SE | 45 | 1013 |
| 09:00 | 15:00 | 19.3°C | 16.1°C | 0 | 2.8 | SE | 36 | 1013 |
| 10:00 | 16:00 | 21°C | 17.6°C | 0 | 3.4 | SSE | 36 | 1012 |
| 11:00 | 17:00 | 22.3°C | 18.7°C | 0 | 3.7 | S | 34 | 1012 |
| 12:00 | 18:00 | 22.8°C | 19.5°C | 0 | 3.5 | SSW | 34 | 1011 |
| 13:00 | 19:00 | 23.5°C | 20.4°C | 0 | 3.4 | SSW | 34 | 1010 |
| 14:00 | 20:00 | 24.3°C | 21.3°C | 0 | 3.2 | SSW | 32 | 1010 |
| 15:00 | 21:00 | 25.2°C | 22.1°C | 0.08 | 3.1 | SSW | 28 | 1008 |
| 16:00 | 22:00 | 24.8°C | 22.3°C | 0 | 2.7 | SSW | 33 | 1007 |
| 17:00 | 23:00 | 24.6°C | 21.7°C | 0 | 3.2 | SSW | 33 | 1006 |
| 18:00 | 00:00 | 24.3°C | 21.5°C | 0 | 3.3 | S | 35 | 1005 |
| 19:00 | 01:00 | 23°C | 21.3°C | 0.02 | 1.9 | S | 40 | 1004 |
| 20:00 | 02:00 | 21.6°C | 18.9°C | 0.2 | 3.3 | SW | 44 | 1005 |
| 21:00 | 03:00 | 19.1°C | 17.7°C | 0.72 | 2.1 | SW | 56 | 1008 |
| 22:00 | 04:00 | 16.6°C | 16.3°C | 1.26 | 1.4 | S | 75 | 1008 |
| 23:00 | 05:00 | 15.1°C | 14.6°C | 1.13 | 1.7 | SSE | 85 | 1008 |
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 21 September 2016 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 (2026-07-20). 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 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Roy, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 20, 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 2026-07-20},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.