Idalou
United States · 18 April 2018
← 17 April 201819 April 2018 →
Average
15.7°C
low 8.3°C · high 21.6°C
Rainfall
0mm
dry day
Wind
5.5m/s
daily average
Humidity
16.8%
daily average
Cloud
9%
cover
Pressure
1019hPa
daily average
The temperature ranged from 8.3°C around 08:00 to 21.6°C around 00:00. 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
39th percentile
Low temperature
39th percentile
Rainfall
61th percentile
Wind
56th 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 16.3°C, versus 15.7°C on this specific day.
Sun & daylight
Sunrise
07:12
Sunset
20:20
Day length
13h 8m
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 | 21.6°C | 13.3°C | 0 | 7 | WSW | 8 | 1005 |
| 01:00 | 06:00 | 20.6°C | 13.4°C | 0 | 5.8 | W | 9 | 1007 |
| 02:00 | 07:00 | 18.8°C | 11.5°C | 0 | 5.9 | NNW | 11 | 1009 |
| 03:00 | 08:00 | 17.7°C | 10.6°C | 0 | 5.6 | N | 11 | 1011 |
| 04:00 | 09:00 | 14.7°C | 7.4°C | 0 | 5.7 | N | 13 | 1012 |
| 05:00 | 10:00 | 10.7°C | 1.2°C | 0 | 8.8 | N | 14 | 1016 |
| 06:00 | 11:00 | 9.8°C | 0.6°C | 0 | 8.3 | NNE | 17 | 1019 |
| 07:00 | 12:00 | 8.9°C | 0.9°C | 0 | 7.1 | NNE | 25 | 1021 |
| 08:00 | 13:00 | 8.3°C | 0.7°C | 0 | 6.6 | NNE | 30 | 1022 |
| 09:00 | 14:00 | 9.7°C | 1.2°C | 0 | 8 | NNE | 28 | 1023 |
| 10:00 | 15:00 | 13.3°C | 4.4°C | 0 | 8.6 | NNE | 22 | 1023 |
| 11:00 | 16:00 | 14.8°C | 6.3°C | 0 | 7.9 | NNE | 19 | 1023 |
| 12:00 | 17:00 | 16.6°C | 8.5°C | 0 | 7.3 | NNE | 16 | 1023 |
| 13:00 | 18:00 | 17.5°C | 9.9°C | 0 | 6.6 | NNE | 15 | 1023 |
| 14:00 | 19:00 | 18°C | 11.1°C | 0 | 5.6 | NNE | 15 | 1022 |
| 15:00 | 20:00 | 18.7°C | 12.6°C | 0 | 4.6 | NNE | 15 | 1021 |
| 16:00 | 21:00 | 20°C | 14.2°C | 0 | 4.1 | NNE | 14 | 1021 |
| 17:00 | 22:00 | 20.2°C | 14.9°C | 0 | 3.2 | N | 13 | 1021 |
| 18:00 | 23:00 | 20.1°C | 15.1°C | 0 | 3 | NNE | 13 | 1020 |
| 19:00 | 00:00 | 19.9°C | 14.7°C | 0 | 3 | NE | 13 | 1020 |
| 20:00 | 01:00 | 18.8°C | 14.2°C | 0 | 2.2 | ENE | 14 | 1020 |
| 21:00 | 02:00 | 16.3°C | 11.6°C | 0 | 2.6 | ENE | 17 | 1021 |
| 22:00 | 03:00 | 11.4°C | 6.6°C | 0 | 2.8 | E | 25 | 1022 |
| 23:00 | 04:00 | 10.6°C | 5.7°C | 0 | 2.9 | E | 26 | 1023 |
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 18 April 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.