Katy
United States · 28 August 2018
← 27 August 201829 August 2018 →
Average
29°C
low 25.2° · high 33.3°
Rainfall
7.3mm
rain recorded
Wind
2.4m/s
daily average
Humidity
76.3%
daily average
Cloud
97%
cover
Pressure
1015hPa
daily average
The temperature ranged from 25.2°C around 07:00 to 33.3°C around 14:00. Rain was recorded across 6 hours, from around 06:00 to 17:00 (7.3mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
47th percentile
Low temperature
76th percentile
Rainfall
76th percentile
Wind
60th 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 28.5°C, versus 29°C on this specific day.
Sun & daylight
Sunrise
06:58
Sunset
19:49
Day length
12h 52m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Chicago.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 27.9 | 32.1 | 0 | 3.5 | SE | 87 | 1014 |
| 01:00 | 06:00 | 27.4 | 31.4 | 0 | 3.6 | SSE | 87 | 1014 |
| 02:00 | 07:00 | 27.2 | 31.3 | 0.03 | 3.2 | SSE | 87 | 1014 |
| 03:00 | 08:00 | 27.1 | 31.6 | 0.02 | 2.5 | SSE | 87 | 1014 |
| 04:00 | 09:00 | 26.8 | 31.3 | 0 | 2.5 | SSE | 89 | 1014 |
| 05:00 | 10:00 | 25.5 | 30.8 | 0.01 | 0.8 | WNW | 92 | 1014 |
| 06:00 | 11:00 | 25.5 | 30.1 | 0.11 | 1.8 | SE | 91 | 1014 |
| 07:00 | 12:00 | 25.2 | 28.7 | 0.25 | 3 | SSE | 91 | 1015 |
| 08:00 | 13:00 | 26.1 | 30.9 | 0 | 1.7 | SSE | 90 | 1015 |
| 09:00 | 14:00 | 27.7 | 32.6 | 0.03 | 2.1 | SE | 85 | 1015 |
| 10:00 | 15:00 | 30.9 | 34.4 | 0.05 | 2.1 | SSE | 62 | 1016 |
| 11:00 | 16:00 | 32 | 36.4 | 0.07 | 1.4 | S | 59 | 1016 |
| 12:00 | 17:00 | 32.7 | 36.6 | 0.05 | 1.7 | SSE | 56 | 1016 |
| 13:00 | 18:00 | 33.1 | 37 | 0.03 | 1.8 | SSE | 55 | 1016 |
| 14:00 | 19:00 | 33.3 | 37 | 1.52 | 2.3 | SE | 55 | 1015 |
| 15:00 | 20:00 | 31.8 | 34.7 | 1.31 | 3.1 | SE | 59 | 1015 |
| 16:00 | 21:00 | 31 | 33.6 | 3.02 | 3.7 | SE | 63 | 1014 |
| 17:00 | 22:00 | 29.5 | 35.2 | 0.72 | 1.1 | E | 77 | 1014 |
| 18:00 | 23:00 | 30.7 | 35.6 | 0.01 | 2.1 | ENE | 72 | 1015 |
| 19:00 | 00:00 | 30.7 | 35.5 | 0.03 | 1.9 | ESE | 70 | 1015 |
| 20:00 | 01:00 | 29.7 | 33.4 | 0 | 3.6 | SE | 74 | 1014 |
| 21:00 | 02:00 | 28.6 | 32.5 | 0 | 3.2 | SSE | 78 | 1015 |
| 22:00 | 03:00 | 27.8 | 32.1 | 0 | 2.7 | S | 82 | 1015 |
| 23:00 | 04:00 | 27.3 | 31.3 | 0 | 2.9 | SSE | 83 | 1015 |
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
- Katy — 29.750°, -95.750°, ERA5 grid cell center, 8.2 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 28 August 2018 specifically — not a monthly average. See the Katy 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 (2026-07-17). Historical climate data for Katy, United States (29.75°N, 95.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Katy, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Katy, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Katy, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-17},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.