Home / Arnold / 23 October 2017
Arnold
United States · 23 October 2017
← 22 October 201724 October 2017 →
Average
16.9°C
low 8.4° · high 27.7°
Rainfall
0mm
dry day
Wind
3.3m/s
daily average
Humidity
32.8%
daily average
Cloud
0%
cover
Pressure
1024hPa
daily average
The temperature ranged from 8.4°C around 00:00 to 27.7°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
98th percentile
Low temperature
87th percentile
Rainfall
76th percentile
Wind
90th 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 11.4°C, versus 16.9°C on this specific day.
Sun & daylight
Sunrise
07:18
Sunset
18:11
Day length
10h 54m
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 | 8.4 | 3 | 0 | 4.3 | ENE | 44 | 1024 |
| 01:00 | 08:00 | 8.8 | 2.9 | 0 | 4.8 | ENE | 38 | 1024 |
| 02:00 | 09:00 | 8.9 | 2.8 | 0 | 5.1 | ENE | 38 | 1024 |
| 03:00 | 10:00 | 9.1 | 2.7 | 0 | 5.5 | ENE | 37 | 1025 |
| 04:00 | 11:00 | 9.1 | 3.1 | 0 | 5 | ENE | 39 | 1024 |
| 05:00 | 12:00 | 8.8 | 3.1 | 0 | 4.5 | ENE | 40 | 1024 |
| 06:00 | 13:00 | 8.6 | 3.5 | 0 | 3.7 | ENE | 41 | 1024 |
| 07:00 | 14:00 | 9 | 4 | 0 | 3.7 | ENE | 41 | 1024 |
| 08:00 | 15:00 | 11.2 | 5.6 | 0 | 4.1 | ENE | 29 | 1025 |
| 09:00 | 16:00 | 15.4 | 10.5 | 0 | 3.9 | ENE | 32 | 1025 |
| 10:00 | 17:00 | 20 | 16.1 | 0 | 2.5 | ENE | 25 | 1025 |
| 11:00 | 18:00 | 23.2 | 20.6 | 0 | 1.2 | E | 24 | 1025 |
| 12:00 | 19:00 | 24.5 | 22.6 | 0 | 0.6 | SSE | 24 | 1024 |
| 13:00 | 20:00 | 25.4 | 23.5 | 0 | 0.8 | WSW | 25 | 1024 |
| 14:00 | 21:00 | 26.6 | 24.4 | 0 | 0.9 | W | 21 | 1023 |
| 15:00 | 22:00 | 27.7 | 25.9 | 0 | 1 | NNW | 24 | 1023 |
| 16:00 | 23:00 | 27.2 | 25.9 | 0 | 0.5 | NNW | 25 | 1022 |
| 17:00 | 00:00 | 25.4 | 24.4 | 0 | 0.7 | WNW | 33 | 1023 |
| 18:00 | 01:00 | 24.1 | 21.5 | 0 | 1.5 | NE | 25 | 1023 |
| 19:00 | 02:00 | 20.2 | 15.8 | 0 | 3.4 | ENE | 26 | 1023 |
| 20:00 | 03:00 | 16.8 | 12.1 | 0 | 5 | ENE | 44 | 1024 |
| 21:00 | 04:00 | 15.9 | 10.4 | 0 | 5.6 | ENE | 41 | 1024 |
| 22:00 | 05:00 | 15.7 | 9.8 | 0 | 5.9 | ENE | 38 | 1025 |
| 23:00 | 06:00 | 15.5 | 9.3 | 0 | 6.1 | ENE | 36 | 1025 |
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
- Arnold — 38.250°, -120.250°, ERA5 grid cell center, 8.8 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 23 October 2017 specifically — not a monthly average. See the Arnold 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 Arnold, United States (38.25°N, 120.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Arnold, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Arnold, 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 Arnold, 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.