Cotulla
United States · 18 May 2017
Average
29.8°C
low 25.1°C · high 36°C
Rainfall
0.1mm
dry day
Wind
6.1m/s
daily average
Humidity
65.3%
daily average
Cloud
44%
cover
Pressure
1005hPa
daily average
The temperature ranged from 25.1°C around 05:00 to 36°C around 18:00. 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
67th percentile
Low temperature
77th percentile
Rainfall
41th percentile
Wind
94th 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 27.8°C, versus 29.8°C on this specific day.
Sun & daylight
Sunrise
06:44
Sunset
20:22
Day length
13h 38m
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 | 26.3°C | 28.1°C | 0 | 5.5 | ESE | 87 | 1006 |
| 01:00 | 06:00 | 25.8°C | 27.4°C | 0 | 5.6 | ESE | 88 | 1006 |
| 02:00 | 07:00 | 25.6°C | 27.2°C | 0 | 5.2 | SE | 86 | 1006 |
| 03:00 | 08:00 | 25.5°C | 27.2°C | 0 | 4.8 | SE | 85 | 1006 |
| 04:00 | 09:00 | 25.2°C | 27.6°C | 0 | 4.6 | SE | 91 | 1006 |
| 05:00 | 10:00 | 25.1°C | 27.6°C | 0 | 3.8 | SE | 87 | 1006 |
| 06:00 | 11:00 | 25.4°C | 27.6°C | 0 | 4.1 | SE | 86 | 1006 |
| 07:00 | 12:00 | 25.7°C | 27.8°C | 0.01 | 4.2 | SE | 84 | 1006 |
| 08:00 | 13:00 | 26.1°C | 27.1°C | 0.03 | 5.8 | SE | 81 | 1006 |
| 09:00 | 14:00 | 27.1°C | 27.4°C | 0.02 | 6.8 | SSE | 77 | 1007 |
| 10:00 | 15:00 | 29.3°C | 28.7°C | 0.01 | 6.8 | SSE | 61 | 1007 |
| 11:00 | 16:00 | 30.4°C | 29.8°C | 0 | 6.9 | SSE | 58 | 1007 |
| 12:00 | 17:00 | 31.3°C | 30.1°C | 0 | 7 | SSE | 51 | 1006 |
| 13:00 | 18:00 | 32.3°C | 31.2°C | 0 | 7 | SSE | 49 | 1006 |
| 14:00 | 19:00 | 33.4°C | 33°C | 0 | 6.5 | SSE | 48 | 1005 |
| 15:00 | 20:00 | 34.5°C | 33.9°C | 0 | 6.2 | SSE | 43 | 1004 |
| 16:00 | 21:00 | 35.7°C | 34.7°C | 0 | 6.2 | SSE | 38 | 1003 |
| 17:00 | 22:00 | 35.4°C | 34.8°C | 0 | 6.4 | SSE | 42 | 1002 |
| 18:00 | 23:00 | 36°C | 35.1°C | 0 | 6.8 | SE | 40 | 1002 |
| 19:00 | 00:00 | 35.5°C | 34.7°C | 0 | 6.8 | SE | 42 | 1002 |
| 20:00 | 01:00 | 33.8°C | 32.7°C | 0 | 6.9 | ESE | 45 | 1002 |
| 21:00 | 02:00 | 31.8°C | 31.2°C | 0 | 7.6 | ESE | 56 | 1003 |
| 22:00 | 03:00 | 29.4°C | 29.3°C | 0 | 8 | SE | 70 | 1004 |
| 23:00 | 04:00 | 28.1°C | 28°C | 0 | 7.6 | SE | 73 | 1005 |
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
- Cotulla — 28.500°, -99.250°, ERA5 grid cell center, 7.2 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 18 May 2017 specifically — not a monthly average. See the Cotulla 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 Cotulla, United States (28.50°N, 99.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Cotulla, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Cotulla, 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 Cotulla, 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.