Idalou
United States · 27 May 2018
Average
29.1°C
low 20°C · high 37°C
Rainfall
0.1mm
dry day
Wind
6.5m/s
daily average
Humidity
40%
daily average
Cloud
21%
cover
Pressure
1006hPa
daily average
The temperature ranged from 20°C around 06:00 to 37°C around 16:00. 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
99th percentile
Low temperature
93th percentile
Rainfall
44th percentile
Wind
86th 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 21.8°C, versus 29.1°C on this specific day.
Sun & daylight
Sunrise
06:39
Sunset
20:49
Day length
14h 10m
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 | 25.2°C | 22.4°C | 0 | 6.9 | SE | 57 | 1006 |
| 01:00 | 06:00 | 24.7°C | 22.2°C | 0 | 6.5 | SE | 59 | 1007 |
| 02:00 | 07:00 | 23.7°C | 21.5°C | 0 | 6.1 | SE | 63 | 1006 |
| 03:00 | 08:00 | 22.8°C | 21.1°C | 0 | 5 | SE | 62 | 1006 |
| 04:00 | 09:00 | 22°C | 20.3°C | 0 | 4.1 | SE | 60 | 1007 |
| 05:00 | 10:00 | 20.1°C | 18.6°C | 0 | 3.6 | S | 66 | 1007 |
| 06:00 | 11:00 | 20°C | 19.2°C | 0 | 2.7 | S | 65 | 1007 |
| 07:00 | 12:00 | 20.1°C | 19.3°C | 0 | 2.6 | S | 66 | 1008 |
| 08:00 | 13:00 | 21.1°C | 19.6°C | 0 | 3.9 | S | 63 | 1008 |
| 09:00 | 14:00 | 23.9°C | 21.9°C | 0 | 4.6 | S | 54 | 1008 |
| 10:00 | 15:00 | 29.1°C | 25.3°C | 0 | 5.9 | S | 33 | 1007 |
| 11:00 | 16:00 | 32.2°C | 28.3°C | 0 | 6.6 | SSE | 30 | 1007 |
| 12:00 | 17:00 | 34.9°C | 30.4°C | 0 | 7 | SSE | 24 | 1006 |
| 13:00 | 18:00 | 36.4°C | 31.1°C | 0 | 7.6 | SSE | 20 | 1006 |
| 14:00 | 19:00 | 36.5°C | 30.4°C | 0.07 | 8.4 | SSE | 19 | 1005 |
| 15:00 | 20:00 | 36.7°C | 30.5°C | 0 | 8.5 | SSE | 18 | 1005 |
| 16:00 | 21:00 | 37°C | 30.5°C | 0 | 8.5 | SSE | 16 | 1004 |
| 17:00 | 22:00 | 36°C | 29.8°C | 0 | 8.4 | SE | 19 | 1003 |
| 18:00 | 23:00 | 35.4°C | 29.5°C | 0 | 8.7 | SSE | 22 | 1002 |
| 19:00 | 00:00 | 35.6°C | 30.4°C | 0 | 7.5 | SSE | 21 | 1003 |
| 20:00 | 01:00 | 34.7°C | 30.1°C | 0 | 7 | SE | 23 | 1003 |
| 21:00 | 02:00 | 33.4°C | 28.6°C | 0 | 7.3 | SE | 26 | 1005 |
| 22:00 | 03:00 | 29°C | 23.6°C | 0 | 8.7 | SE | 36 | 1006 |
| 23:00 | 04:00 | 27.8°C | 22.2°C | 0 | 9.1 | SE | 39 | 1007 |
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
- Idalou — 33.750°, -101.750°, ERA5 grid cell center, 11.2 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 27 May 2018 specifically — not a monthly average. See the Idalou 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 Idalou, United States (33.75°N, 101.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Idalou, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Idalou, 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 Idalou, 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.