Union
United States · 28 August 2024
← 27 August 202429 August 2024 →
Average
26.8°C
low 22.4°C · high 34.1°C
Rainfall
2.4mm
rain recorded
Wind
1.6m/s
daily average
Humidity
78.2%
daily average
Cloud
68%
cover
Pressure
1018hPa
daily average
The temperature ranged from 22.4°C around 05:00 to 34.1°C around 16:00. Rain was recorded across 3 hours, from around 17:00 to 20:00 (2.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
96th percentile
Low temperature
86th percentile
Rainfall
77th percentile
Wind
21th 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 23.7°C, versus 26.8°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 | 25.4°C | 28.9°C | 0 | 1.7 | SW | 81 | 1017 |
| 01:00 | 06:00 | 24.5°C | 27.9°C | 0 | 1.8 | SSW | 86 | 1017 |
| 02:00 | 07:00 | 24.3°C | 27.6°C | 0 | 1.8 | SW | 86 | 1017 |
| 03:00 | 08:00 | 24.1°C | 27.5°C | 0 | 1.4 | W | 86 | 1017 |
| 04:00 | 09:00 | 23.6°C | 27°C | 0 | 1.4 | W | 87 | 1017 |
| 05:00 | 10:00 | 22.4°C | 25.4°C | 0 | 1.9 | NE | 93 | 1018 |
| 06:00 | 11:00 | 22.5°C | 24.8°C | 0 | 2.8 | NE | 92 | 1019 |
| 07:00 | 12:00 | 22.6°C | 24.7°C | 0 | 3.1 | ENE | 92 | 1020 |
| 08:00 | 13:00 | 23.1°C | 25.8°C | 0 | 2.9 | ENE | 94 | 1020 |
| 09:00 | 14:00 | 24.8°C | 27.9°C | 0 | 2.8 | E | 89 | 1020 |
| 10:00 | 15:00 | 26.5°C | 30.1°C | 0 | 2 | ESE | 79 | 1019 |
| 11:00 | 16:00 | 27.9°C | 31.5°C | 0 | 1.4 | SSE | 69 | 1019 |
| 12:00 | 17:00 | 30.1°C | 33.6°C | 0.05 | 1.3 | S | 60 | 1019 |
| 13:00 | 18:00 | 31.3°C | 35°C | 0.03 | 1.1 | SSW | 56 | 1018 |
| 14:00 | 19:00 | 32.6°C | 36.3°C | 0.05 | 0.9 | SW | 52 | 1017 |
| 15:00 | 20:00 | 34°C | 37.8°C | 0.04 | 0.7 | W | 47 | 1017 |
| 16:00 | 21:00 | 34.1°C | 37.8°C | 0.02 | 0.7 | NW | 47 | 1016 |
| 17:00 | 22:00 | 29°C | 34.2°C | 1.69 | 1.1 | NW | 76 | 1016 |
| 18:00 | 23:00 | 29.3°C | 34.3°C | 0.36 | 1 | W | 73 | 1017 |
| 19:00 | 00:00 | 28.9°C | 34.1°C | 0 | 0.6 | NE | 74 | 1016 |
| 20:00 | 01:00 | 27.2°C | 31.5°C | 0.17 | 2.1 | E | 82 | 1017 |
| 21:00 | 02:00 | 26.1°C | 30.7°C | 0 | 1.5 | SE | 86 | 1018 |
| 22:00 | 03:00 | 24.7°C | 29.4°C | 0 | 1.3 | SE | 94 | 1018 |
| 23:00 | 04:00 | 24.2°C | 28.5°C | 0 | 1.6 | SE | 94 | 1018 |
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 2024 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 (2026-07-20). 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 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Union, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 20, 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 2026-07-20},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.