Home / Thermal / 15 August 2017
Thermal
United States · 15 August 2017
← 14 August 201716 August 2017 →
Average
24.8°C
low 19.1° · high 32.1°
Rainfall
0mm
dry day
Wind
2.8m/s
daily average
Humidity
40%
daily average
Cloud
5%
cover
Pressure
1008hPa
daily average
The temperature ranged from 19.1°C around 04:00 to 32.1°C around 15:00. 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
3th percentile
Low temperature
2th percentile
Rainfall
72th percentile
Wind
98th 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 31.2°C, versus 24.8°C on this specific day.
Sun & daylight
Sunrise
06:07
Sunset
19:31
Day length
13h 24m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Los_Angeles.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 07:00 | 22.5 | 20.9 | 0 | 2.5 | W | 47 | 1008 |
| 01:00 | 08:00 | 21.6 | 20.4 | 0 | 2.4 | W | 52 | 1008 |
| 02:00 | 09:00 | 19.9 | 18.8 | 0 | 2.3 | W | 59 | 1008 |
| 03:00 | 10:00 | 19.8 | 18.6 | 0 | 2.1 | WSW | 55 | 1008 |
| 04:00 | 11:00 | 19.1 | 17.9 | 0 | 2.1 | WSW | 58 | 1008 |
| 05:00 | 12:00 | 19.3 | 18.2 | 0 | 2.2 | W | 61 | 1008 |
| 06:00 | 13:00 | 19.5 | 18.5 | 0 | 2.3 | W | 61 | 1009 |
| 07:00 | 14:00 | 19.8 | 18.6 | 0 | 2.4 | W | 60 | 1009 |
| 08:00 | 15:00 | 21 | 19.1 | 0 | 3 | W | 52 | 1009 |
| 09:00 | 16:00 | 22.8 | 21 | 0 | 3 | W | 47 | 1009 |
| 10:00 | 17:00 | 25.4 | 23.7 | 0 | 3 | WSW | 41 | 1009 |
| 11:00 | 18:00 | 27.3 | 25.2 | 0 | 2.9 | WSW | 33 | 1009 |
| 12:00 | 19:00 | 28.8 | 26.2 | 0 | 3 | WSW | 26 | 1008 |
| 13:00 | 20:00 | 30.1 | 26.8 | 0 | 3.3 | WSW | 21 | 1008 |
| 14:00 | 21:00 | 31.1 | 26.5 | 0 | 3.8 | WSW | 13 | 1007 |
| 15:00 | 22:00 | 32.1 | 28.8 | 0 | 3.1 | WSW | 18 | 1007 |
| 16:00 | 23:00 | 31.9 | 28.1 | 0 | 3.6 | WSW | 18 | 1007 |
| 17:00 | 00:00 | 31.5 | 28 | 0 | 3.3 | WSW | 18 | 1006 |
| 18:00 | 01:00 | 30.6 | 27.2 | 0 | 3.3 | WSW | 20 | 1006 |
| 19:00 | 02:00 | 28.4 | 25.2 | 0 | 3.3 | WSW | 24 | 1007 |
| 20:00 | 03:00 | 25.5 | 23 | 0 | 3 | WSW | 33 | 1007 |
| 21:00 | 04:00 | 23.5 | 21.4 | 0 | 2.9 | W | 41 | 1008 |
| 22:00 | 05:00 | 22.4 | 20.6 | 0 | 2.8 | W | 47 | 1009 |
| 23:00 | 06:00 | 21.5 | 20.1 | 0 | 2.6 | W | 52 | 1009 |
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
- Thermal — 33.750°, -116.250°, ERA5 grid cell center, 15.9 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 15 August 2017 specifically — not a monthly average. See the Thermal 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 (2026-07-18). Historical climate data for Thermal, United States (33.75°N, 116.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Thermal, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Thermal, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Thermal, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.