Home / Ash Flat / 18 August 2021
Ash Flat
United States · 18 August 2021
← 17 August 202119 August 2021 →
Average
23.2°C
low 21°C · high 24.8°C
Rainfall
18.4mm
rain recorded
Wind
1.6m/s
daily average
Humidity
89.1%
daily average
Cloud
93%
cover
Pressure
1017hPa
daily average
The temperature ranged from 21°C around 08:00 to 24.8°C around 13:00. Rain was recorded across 17 hours, from around 05:00 to 23:00 (18.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
4th percentile
Low temperature
42th percentile
Rainfall
95th percentile
Wind
19th 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 25.7°C, versus 23.2°C on this specific day.
Sun & daylight
Sunrise
06:26
Sunset
19:52
Day length
13h 25m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Chicago.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 24.1°C | 25.4°C | 0 | 1.8 | SSE | 66 | 1015 |
| 01:00 | 06:00 | 23.6°C | 24.8°C | 0 | 1.9 | SE | 68 | 1015 |
| 02:00 | 07:00 | 23.2°C | 24.9°C | 0 | 1.3 | ESE | 71 | 1015 |
| 03:00 | 08:00 | 23.2°C | 24.8°C | 0 | 1.3 | E | 70 | 1015 |
| 04:00 | 09:00 | 23.2°C | 24.6°C | 0.04 | 1.6 | ESE | 71 | 1016 |
| 05:00 | 10:00 | 21.6°C | 22.7°C | 0.74 | 2.6 | SSE | 81 | 1016 |
| 06:00 | 11:00 | 21.1°C | 22.9°C | 0.59 | 2.1 | SSE | 88 | 1017 |
| 07:00 | 12:00 | 21.2°C | 23.5°C | 1.12 | 1.5 | S | 89 | 1017 |
| 08:00 | 13:00 | 21°C | 23.9°C | 0.95 | 1.3 | SW | 95 | 1018 |
| 09:00 | 14:00 | 21.4°C | 24.8°C | 2 | 1.2 | WSW | 99 | 1019 |
| 10:00 | 15:00 | 22.3°C | 26.3°C | 2.76 | 0.9 | WSW | 98 | 1019 |
| 11:00 | 16:00 | 22.7°C | 27.2°C | 3.05 | 0.7 | ESE | 99 | 1019 |
| 12:00 | 17:00 | 23.9°C | 28.2°C | 2.25 | 1.5 | ESE | 96 | 1019 |
| 13:00 | 18:00 | 24.8°C | 29.2°C | 1.06 | 1.9 | ESE | 94 | 1019 |
| 14:00 | 19:00 | 23.5°C | 27.2°C | 0.65 | 2 | ESE | 96 | 1019 |
| 15:00 | 20:00 | 24.2°C | 28.4°C | 0.44 | 1.5 | ESE | 93 | 1018 |
| 16:00 | 21:00 | 24°C | 27.9°C | 0.42 | 1.9 | SE | 94 | 1018 |
| 17:00 | 22:00 | 23.5°C | 27.5°C | 0.17 | 2 | E | 99 | 1017 |
| 18:00 | 23:00 | 24.3°C | 28.6°C | 0.05 | 1.8 | ESE | 95 | 1017 |
| 19:00 | 00:00 | 24.8°C | 29.1°C | 0.01 | 1.7 | ESE | 93 | 1017 |
| 20:00 | 01:00 | 24.7°C | 29.3°C | 0.11 | 1.5 | ESE | 94 | 1018 |
| 21:00 | 02:00 | 24.3°C | 28.5°C | 0.43 | 1.9 | ESE | 95 | 1018 |
| 22:00 | 03:00 | 23.6°C | 27.6°C | 0.23 | 2.1 | E | 98 | 1019 |
| 23:00 | 04:00 | 23.3°C | 27.2°C | 1.29 | 1.6 | E | 97 | 1018 |
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
- Ash Flat — 36.250°, -91.500°, ERA5 grid cell center, 10.2 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 18 August 2021 specifically — not a monthly average. See the Ash Flat 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 Ash Flat, United States (36.25°N, 91.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Ash Flat, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Ash Flat, 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 Ash Flat, 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.