Katy
United States · 30 August 2017
← 29 August 201731 August 2017 →
Average
26.5°C
low 22.6°C · high 31°C
Rainfall
1mm
dry day
Wind
6.2m/s
daily average
Humidity
68.4%
daily average
Cloud
50%
cover
Pressure
1008hPa
daily average
The temperature ranged from 22.6°C around 01:00 to 31°C around 17:00. Rain was recorded across 3 hours, from around 06:00 to 08:00 (1mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
18th percentile
Low temperature
6th percentile
Rainfall
40th percentile
Wind
100th 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 28.6°C, versus 26.5°C on this specific day.
Sun & daylight
Sunrise
06:59
Sunset
19:47
Day length
12h 48m
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 | 22.7°C | 21.8°C | 0.04 | 6.9 | NNW | 88 | 1007 |
| 01:00 | 06:00 | 22.6°C | 21.6°C | 0.02 | 6.8 | NNW | 85 | 1007 |
| 02:00 | 07:00 | 23°C | 21.8°C | 0.02 | 6.8 | NNW | 82 | 1007 |
| 03:00 | 08:00 | 23.3°C | 21.9°C | 0.04 | 6.9 | NW | 80 | 1006 |
| 04:00 | 09:00 | 23.1°C | 21.3°C | 0.06 | 7.3 | NW | 78 | 1006 |
| 05:00 | 10:00 | 22.8°C | 21.6°C | 0.08 | 6.4 | NW | 79 | 1007 |
| 06:00 | 11:00 | 22.9°C | 21.4°C | 0.22 | 6.6 | NW | 78 | 1007 |
| 07:00 | 12:00 | 22.8°C | 21°C | 0.3 | 7.3 | NW | 80 | 1007 |
| 08:00 | 13:00 | 23.3°C | 21.7°C | 0.16 | 7.6 | NW | 81 | 1008 |
| 09:00 | 14:00 | 24.6°C | 23.7°C | 0.03 | 7.5 | NW | 82 | 1008 |
| 10:00 | 15:00 | 26.9°C | 25°C | 0 | 7.5 | NW | 63 | 1009 |
| 11:00 | 16:00 | 28.1°C | 26°C | 0 | 8.1 | NW | 61 | 1009 |
| 12:00 | 17:00 | 29.3°C | 27.1°C | 0 | 8.5 | NW | 57 | 1009 |
| 13:00 | 18:00 | 29.9°C | 27.9°C | 0 | 8.4 | NW | 57 | 1009 |
| 14:00 | 19:00 | 30.4°C | 29°C | 0.01 | 8 | NW | 58 | 1009 |
| 15:00 | 20:00 | 30.3°C | 29.4°C | 0 | 7.6 | NNW | 59 | 1009 |
| 16:00 | 21:00 | 30.3°C | 30.4°C | 0 | 6.6 | NNW | 61 | 1009 |
| 17:00 | 22:00 | 31°C | 31°C | 0 | 5.5 | NNW | 53 | 1008 |
| 18:00 | 23:00 | 30.8°C | 32°C | 0 | 4.1 | NW | 55 | 1009 |
| 19:00 | 00:00 | 29.5°C | 30.6°C | 0 | 3.4 | NW | 55 | 1009 |
| 20:00 | 01:00 | 28.9°C | 30.4°C | 0 | 2.6 | NW | 56 | 1010 |
| 21:00 | 02:00 | 27.5°C | 28.9°C | 0 | 2.4 | NW | 58 | 1010 |
| 22:00 | 03:00 | 26°C | 27.5°C | 0 | 2.6 | WNW | 67 | 1011 |
| 23:00 | 04:00 | 25.6°C | 26.8°C | 0 | 2.9 | WNW | 68 | 1011 |
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 30 August 2017 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 (2026-07-20). 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 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Katy, 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 Katy, 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.