Home / Gray Summit / 21 August 2017
Gray Summit
United States · 21 August 2017
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Average
26.5°C
low 22.2°C · high 31.3°C
Rainfall
15mm
rain recorded
Wind
1.8m/s
daily average
Humidity
84.2%
daily average
Cloud
83%
cover
Pressure
1017hPa
daily average
The temperature ranged from 22.2°C around 05:00 to 31.3°C around 15:00. Rain was recorded across 6 hours, from around 03:00 to 16:00 (14.9mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
67th percentile
Low temperature
76th percentile
Rainfall
93th percentile
Wind
27th 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 24.6°C, versus 26.5°C on this specific day.
Sun & daylight
Sunrise
06:22
Sunset
19:48
Day length
13h 26m
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 | 23.9°C | 26.9°C | 0 | 1.8 | S | 84 | 1017 |
| 01:00 | 06:00 | 23.7°C | 26°C | 0 | 2.3 | S | 83 | 1017 |
| 02:00 | 07:00 | 23.8°C | 26°C | 0.05 | 2.6 | SSW | 83 | 1017 |
| 03:00 | 08:00 | 23.1°C | 25.1°C | 0.16 | 2.6 | SSW | 84 | 1017 |
| 04:00 | 09:00 | 23°C | 25.3°C | 0.07 | 2.2 | SSW | 85 | 1018 |
| 05:00 | 10:00 | 22.2°C | 25.2°C | 0.02 | 2.4 | S | 99 | 1017 |
| 06:00 | 11:00 | 22.3°C | 25.2°C | 0 | 2.8 | SW | 99 | 1019 |
| 07:00 | 12:00 | 22.3°C | 25.9°C | 0 | 1.6 | W | 98 | 1019 |
| 08:00 | 13:00 | 24.9°C | 30.1°C | 0.01 | 1.4 | SW | 99 | 1019 |
| 09:00 | 14:00 | 25.8°C | 31.2°C | 0.58 | 1.8 | SSW | 97 | 1019 |
| 10:00 | 15:00 | 27.2°C | 32.3°C | 1.06 | 1.4 | WSW | 85 | 1019 |
| 11:00 | 16:00 | 28.8°C | 34.7°C | 0 | 1 | NW | 82 | 1019 |
| 12:00 | 17:00 | 30.8°C | 37.3°C | 0 | 0.5 | NNE | 74 | 1019 |
| 13:00 | 18:00 | 31.1°C | 37°C | 0.02 | 0.6 | ESE | 70 | 1018 |
| 14:00 | 19:00 | 30.5°C | 35°C | 2.66 | 1.4 | SE | 66 | 1018 |
| 15:00 | 20:00 | 31.3°C | 35.2°C | 7.82 | 2.1 | SSE | 63 | 1018 |
| 16:00 | 21:00 | 31°C | 34.3°C | 2.49 | 2.3 | SSE | 60 | 1017 |
| 17:00 | 22:00 | 28.2°C | 34.3°C | 0 | 1.8 | NE | 90 | 1016 |
| 18:00 | 23:00 | 29.1°C | 35.7°C | 0 | 1.2 | E | 85 | 1015 |
| 19:00 | 00:00 | 28.5°C | 34.7°C | 0 | 1.2 | SE | 86 | 1016 |
| 20:00 | 01:00 | 27°C | 32°C | 0 | 1.5 | S | 86 | 1016 |
| 21:00 | 02:00 | 26.3°C | 30.5°C | 0 | 2.1 | S | 86 | 1015 |
| 22:00 | 03:00 | 25.2°C | 28.9°C | 0 | 2.5 | S | 90 | 1015 |
| 23:00 | 04:00 | 24.9°C | 27.4°C | 0 | 3.4 | S | 86 | 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
- Gray Summit — 38.500°, -90.750°, ERA5 grid cell center, 5.9 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 21 August 2017 specifically — not a monthly average. See the Gray Summit 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 Gray Summit, United States (38.50°N, 90.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Gray Summit, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Gray Summit, 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 Gray Summit, 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.