Union
United States · 28 August 2020
← 27 August 202029 August 2020 →
Average
26°C
low 22.9°C · high 30.9°C
Rainfall
1.5mm
rain recorded
Wind
2.8m/s
daily average
Humidity
80.6%
daily average
Cloud
65%
cover
Pressure
1007hPa
daily average
The temperature ranged from 22.9°C around 08:00 to 30.9°C around 16:00. Rain was recorded across 6 hours, from around 03:00 to 13:00 (1.5mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
68th percentile
Low temperature
90th percentile
Rainfall
70th percentile
Wind
75th 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 23.6°C, versus 26°C on this specific day.
Sun & daylight
Sunrise
06:30
Sunset
19:39
Day length
13h 9m
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 | 23.7°C | 26.2°C | 0 | 3.1 | E | 90 | 1010 |
| 01:00 | 06:00 | 23.6°C | 25.6°C | 0 | 3.7 | E | 89 | 1009 |
| 02:00 | 07:00 | 24.3°C | 26.3°C | 0.02 | 4 | ESE | 88 | 1008 |
| 03:00 | 08:00 | 24°C | 25.8°C | 0.12 | 3.9 | ESE | 88 | 1007 |
| 04:00 | 09:00 | 23.7°C | 25.7°C | 0.17 | 3.7 | ESE | 88 | 1007 |
| 05:00 | 10:00 | 23.1°C | 25.4°C | 0.2 | 3.2 | ESE | 92 | 1007 |
| 06:00 | 11:00 | 23.1°C | 26°C | 0.05 | 2.4 | E | 93 | 1007 |
| 07:00 | 12:00 | 23°C | 25.9°C | 0.01 | 2.4 | ENE | 92 | 1008 |
| 08:00 | 13:00 | 22.9°C | 25.8°C | 0 | 2.5 | ENE | 96 | 1007 |
| 09:00 | 14:00 | 23.8°C | 26.5°C | 0.03 | 3.2 | ENE | 93 | 1007 |
| 10:00 | 15:00 | 25.3°C | 27.7°C | 0.05 | 3.1 | ENE | 81 | 1007 |
| 11:00 | 16:00 | 26.3°C | 29°C | 0.19 | 3.1 | ENE | 78 | 1007 |
| 12:00 | 17:00 | 27.5°C | 29.5°C | 0.23 | 3.5 | NE | 70 | 1007 |
| 13:00 | 18:00 | 28.6°C | 30.5°C | 0.17 | 3.4 | NE | 65 | 1007 |
| 14:00 | 19:00 | 29.5°C | 31.7°C | 0.08 | 3.4 | NNE | 63 | 1006 |
| 15:00 | 20:00 | 30.2°C | 32.4°C | 0.07 | 3.3 | NNE | 61 | 1006 |
| 16:00 | 21:00 | 30.9°C | 33°C | 0.08 | 3.3 | NNE | 57 | 1005 |
| 17:00 | 22:00 | 30.4°C | 34.3°C | 0.01 | 2 | N | 65 | 1005 |
| 18:00 | 23:00 | 30.1°C | 34.6°C | 0 | 1.5 | NNW | 68 | 1005 |
| 19:00 | 00:00 | 28.7°C | 33.6°C | 0 | 1.5 | NNW | 76 | 1006 |
| 20:00 | 01:00 | 27.4°C | 32°C | 0 | 1.5 | NNW | 81 | 1007 |
| 21:00 | 02:00 | 25.9°C | 30.3°C | 0 | 0.9 | W | 83 | 1007 |
| 22:00 | 03:00 | 24.7°C | 28.6°C | 0 | 2 | WSW | 90 | 1007 |
| 23:00 | 04:00 | 24.2°C | 27.2°C | 0 | 2.7 | WSW | 89 | 1008 |
Nearby cities
Need this verified for an official or legal purpose? Request a weather verification report.
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
- Union — 38.500°, -91.000°, ERA5 grid cell center, 5.6 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 28 August 2020 specifically — not a monthly average. See the Union 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 Union, United States (38.50°N, 91.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Union, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Union, 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 Union, 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.