Home / Arvada / 22 September 2018
Arvada
United States · 22 September 2018
← 21 September 201823 September 2018 →
Average
19.4°C
low 9.4°C · high 29.9°C
Rainfall
0mm
dry day
Wind
2.6m/s
daily average
Humidity
31.1%
daily average
Cloud
1%
cover
Pressure
1014hPa
daily average
The temperature ranged from 9.4°C around 05:00 to 29.9°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
79th percentile
Low temperature
44th percentile
Rainfall
63th percentile
Wind
84th 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 17.3°C, versus 19.4°C on this specific day.
Sun & daylight
Sunrise
06:47
Sunset
18:56
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 | 14.4°C | 11.2°C | 0 | 3.4 | SSW | 60 | 1018 |
| 01:00 | 07:00 | 12.9°C | 9.8°C | 0 | 2.9 | SSW | 60 | 1017 |
| 02:00 | 08:00 | 11.8°C | 8.7°C | 0 | 2.8 | SW | 61 | 1018 |
| 03:00 | 09:00 | 9.7°C | 6.2°C | 0 | 2.7 | SW | 61 | 1017 |
| 04:00 | 10:00 | 9.9°C | 5.9°C | 0 | 3.7 | SW | 66 | 1018 |
| 05:00 | 11:00 | 9.4°C | 5.4°C | 0 | 3.5 | WSW | 64 | 1017 |
| 06:00 | 12:00 | 9.6°C | 5.3°C | 0 | 3.5 | WSW | 54 | 1017 |
| 07:00 | 13:00 | 9.8°C | 5.4°C | 0 | 3.4 | SW | 51 | 1017 |
| 08:00 | 14:00 | 12.6°C | 8.3°C | 0 | 3.6 | WSW | 45 | 1017 |
| 09:00 | 15:00 | 18.9°C | 14.7°C | 0 | 2.7 | WSW | 23 | 1017 |
| 10:00 | 16:00 | 23.7°C | 20°C | 0 | 1.8 | WSW | 16 | 1017 |
| 11:00 | 17:00 | 26.2°C | 22.7°C | 0 | 0.9 | WSW | 11 | 1016 |
| 12:00 | 18:00 | 27.1°C | 24.1°C | 0 | 0.3 | E | 10 | 1015 |
| 13:00 | 19:00 | 28°C | 24.4°C | 0 | 1.2 | E | 10 | 1013 |
| 14:00 | 20:00 | 28.8°C | 24.7°C | 0 | 2 | ESE | 10 | 1013 |
| 15:00 | 21:00 | 29.9°C | 24.9°C | 0 | 2.9 | ESE | 7 | 1011 |
| 16:00 | 22:00 | 29.3°C | 24°C | 0 | 3.3 | E | 7 | 1010 |
| 17:00 | 23:00 | 29°C | 23.5°C | 0 | 3.8 | ESE | 8 | 1010 |
| 18:00 | 00:00 | 28.3°C | 23.1°C | 0 | 3.3 | ESE | 8 | 1010 |
| 19:00 | 01:00 | 24.9°C | 19.9°C | 0 | 3.2 | ESE | 11 | 1011 |
| 20:00 | 02:00 | 23.5°C | 19.1°C | 0 | 2.4 | SSE | 14 | 1011 |
| 21:00 | 03:00 | 17.6°C | 13.9°C | 0 | 2.1 | SSW | 26 | 1011 |
| 22:00 | 04:00 | 16.1°C | 12.6°C | 0 | 1.7 | SSW | 27 | 1012 |
| 23:00 | 05:00 | 14.3°C | 10.9°C | 0 | 1.8 | SSW | 35 | 1012 |
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
- Arvada — 39.750°, -105.000°, ERA5 grid cell center, 9.5 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 Arvada 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 (2026-07-21). Historical climate data for Arvada, United States (39.75°N, 105.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Arvada, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Arvada, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Arvada, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.