Home / Arnold / 31 August 2017
Arnold
United States · 31 August 2017
← 30 August 20171 September 2017 →
Average
22.3°C
low 17.8° · high 26.9°
Rainfall
0mm
dry day
Wind
4.1m/s
daily average
Humidity
68.5%
daily average
Cloud
87%
cover
Pressure
1016hPa
daily average
The temperature ranged from 17.8°C around 05:00 to 26.9°C around 14:00. 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
29th percentile
Low temperature
35th percentile
Rainfall
42th percentile
Wind
96th 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 24°C, versus 22.3°C on this specific day.
Sun & daylight
Sunrise
06:30
Sunset
19:32
Day length
13h 2m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Chicago.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 20.6 | 20.1 | 0 | 3.5 | NE | 74 | 1017 |
| 01:00 | 06:00 | 20.3 | 19.8 | 0 | 3.3 | NE | 74 | 1017 |
| 02:00 | 07:00 | 20.4 | 20.1 | 0 | 3 | NE | 73 | 1017 |
| 03:00 | 08:00 | 19.8 | 19.4 | 0 | 2.8 | NE | 75 | 1016 |
| 04:00 | 09:00 | 20 | 19.5 | 0 | 2.8 | NE | 72 | 1016 |
| 05:00 | 10:00 | 17.8 | 17.7 | 0 | 2.8 | NE | 88 | 1017 |
| 06:00 | 11:00 | 17.9 | 17.8 | 0 | 2.8 | NE | 88 | 1018 |
| 07:00 | 12:00 | 17.9 | 17.6 | 0 | 3 | NE | 87 | 1018 |
| 08:00 | 13:00 | 18.6 | 18.5 | 0 | 3.2 | NE | 86 | 1018 |
| 09:00 | 14:00 | 20.2 | 20 | 0 | 3.4 | NE | 80 | 1018 |
| 10:00 | 15:00 | 22.6 | 21.9 | 0 | 3.7 | NE | 66 | 1018 |
| 11:00 | 16:00 | 24.1 | 23.2 | 0 | 4.2 | NE | 62 | 1018 |
| 12:00 | 17:00 | 25.2 | 24 | 0 | 4.6 | ENE | 57 | 1017 |
| 13:00 | 18:00 | 25.9 | 24.4 | 0 | 4.9 | ENE | 53 | 1017 |
| 14:00 | 19:00 | 26.9 | 25.6 | 0.02 | 4.8 | NE | 52 | 1016 |
| 15:00 | 20:00 | 26.9 | 25.5 | 0 | 4.9 | NE | 52 | 1016 |
| 16:00 | 21:00 | 26.7 | 24.7 | 0 | 5.4 | NE | 50 | 1015 |
| 17:00 | 22:00 | 25.6 | 24.4 | 0 | 4.9 | NNE | 58 | 1015 |
| 18:00 | 23:00 | 25.3 | 24.6 | 0 | 4.4 | NNE | 60 | 1015 |
| 19:00 | 00:00 | 24.4 | 23.3 | 0 | 4.7 | NNE | 63 | 1014 |
| 20:00 | 01:00 | 23.3 | 22 | 0 | 4.8 | NNE | 64 | 1014 |
| 21:00 | 02:00 | 22.9 | 21.4 | 0 | 5 | NNE | 66 | 1015 |
| 22:00 | 03:00 | 21.7 | 20.1 | 0 | 5.2 | NNE | 72 | 1015 |
| 23:00 | 04:00 | 21.5 | 20 | 0 | 5.1 | NNE | 72 | 1015 |
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
- Arnold — 38.500°, -90.500°, ERA5 grid cell center, 13.0 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 31 August 2017 specifically — not a monthly average. See the Arnold 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 (2026-07-17). Historical climate data for Arnold, United States (38.50°N, 90.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Arnold, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Arnold, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Arnold, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-17},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.