Home / Aptos / 23 October 2021
Aptos
United States · 23 October 2021
← 22 October 202124 October 2021 →
Average
13.5°C
low 12.8° · high 14.3°
Rainfall
0mm
dry day
Wind
2.1m/s
daily average
Humidity
91%
daily average
Cloud
73%
cover
Pressure
1014hPa
daily average
The temperature ranged from 12.8°C around 08:00 to 14.3°C around 14:00. 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
2th percentile
Low temperature
29th percentile
Rainfall
80th percentile
Wind
13th 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 15.3°C, versus 13.5°C on this specific day.
Sun & daylight
Sunrise
07:23
Sunset
18:20
Day length
10h 57m
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 | 12.9 | 12.1 | 0 | 2 | WNW | 93 | 1016 |
| 01:00 | 08:00 | 13.1 | 12.3 | 0 | 1.9 | WNW | 93 | 1016 |
| 02:00 | 09:00 | 13.1 | 12.6 | 0 | 1.5 | WNW | 93 | 1016 |
| 03:00 | 10:00 | 13 | 12.8 | 0 | 1 | W | 92 | 1015 |
| 04:00 | 11:00 | 12.8 | 12.7 | 0 | 0.9 | WSW | 93 | 1015 |
| 05:00 | 12:00 | 12.8 | 12.7 | 0 | 1 | WSW | 93 | 1015 |
| 06:00 | 13:00 | 12.8 | 12.1 | 0 | 1.7 | WSW | 93 | 1015 |
| 07:00 | 14:00 | 12.8 | 12.2 | 0 | 1.6 | WSW | 94 | 1015 |
| 08:00 | 15:00 | 12.8 | 12.7 | 0 | 0.9 | SSW | 94 | 1015 |
| 09:00 | 16:00 | 12.9 | 13 | 0 | 0.7 | S | 95 | 1015 |
| 10:00 | 17:00 | 13.2 | 13.1 | 0 | 1.1 | S | 94 | 1016 |
| 11:00 | 18:00 | 13.4 | 13 | 0 | 1.6 | S | 93 | 1016 |
| 12:00 | 19:00 | 13.9 | 13.2 | 0 | 1.9 | SSW | 90 | 1015 |
| 13:00 | 20:00 | 14.1 | 13 | 0 | 2.7 | SW | 89 | 1015 |
| 14:00 | 21:00 | 14.3 | 12.8 | 0 | 3.2 | SW | 88 | 1015 |
| 15:00 | 22:00 | 14.2 | 13 | 0 | 2.8 | SSW | 90 | 1014 |
| 16:00 | 23:00 | 14.1 | 13 | 0 | 2.7 | SSW | 90 | 1014 |
| 17:00 | 00:00 | 13.9 | 13 | 0 | 2.4 | S | 91 | 1013 |
| 18:00 | 01:00 | 13.7 | 13.1 | 0 | 2 | SSE | 92 | 1013 |
| 19:00 | 02:00 | 13.7 | 12.9 | 0 | 2.1 | SSE | 92 | 1013 |
| 20:00 | 03:00 | 13.7 | 12.2 | 0 | 3.1 | SE | 90 | 1013 |
| 21:00 | 04:00 | 13.8 | 11.6 | 0 | 3.9 | SE | 87 | 1012 |
| 22:00 | 05:00 | 14 | 11.6 | 0 | 4.1 | SE | 84 | 1012 |
| 23:00 | 06:00 | 14.1 | 11.5 | 0 | 4.1 | SSE | 82 | 1012 |
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
- Aptos — 37.000°, -122.000°, ERA5 grid cell center, 9.3 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 23 October 2021 specifically — not a monthly average. See the Aptos 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 Aptos, United States (37.00°N, 122.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Aptos, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Aptos, 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 Aptos, 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.