Home / Cotati / 21 October 2025
Cotati
United States · 21 October 2025
← 20 October 202522 October 2025 →
Average
15.4°C
low 9.5°C · high 23.6°C
Rainfall
0.1mm
dry day
Wind
1.6m/s
daily average
Humidity
72.9%
daily average
Cloud
8%
cover
Pressure
1016hPa
daily average
The temperature ranged from 9.5°C around 05:00 to 23.6°C around 14:00. Rain was recorded for one hour, around 23:00 (0.1mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
73th percentile
Low temperature
33th percentile
Rainfall
80th percentile
Wind
34th 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 15.7°C, versus 15.4°C on this specific day.
Sun & daylight
Sunrise
07:26
Sunset
18:24
Day length
10h 58m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Los_Angeles.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 07:00 | 14°C | 13.1°C | 0 | 1.4 | NE | 79 | 1018 |
| 01:00 | 08:00 | 12.2°C | 11.2°C | 0 | 1.3 | NE | 83 | 1018 |
| 02:00 | 09:00 | 11°C | 9.7°C | 0 | 1.5 | NE | 86 | 1018 |
| 03:00 | 10:00 | 9.9°C | 8.7°C | 0 | 1.2 | ENE | 89 | 1017 |
| 04:00 | 11:00 | 9.5°C | 8°C | 0 | 1.3 | ENE | 88 | 1017 |
| 05:00 | 12:00 | 9.5°C | 7.9°C | 0 | 1.4 | E | 87 | 1017 |
| 06:00 | 13:00 | 9.5°C | 7.9°C | 0 | 1.4 | E | 87 | 1017 |
| 07:00 | 14:00 | 9.7°C | 8.2°C | 0 | 1.4 | E | 88 | 1017 |
| 08:00 | 15:00 | 10.3°C | 8.8°C | 0 | 1.4 | E | 86 | 1017 |
| 09:00 | 16:00 | 13.2°C | 12.2°C | 0 | 1.3 | E | 78 | 1018 |
| 10:00 | 17:00 | 17.7°C | 16.9°C | 0 | 1.2 | ESE | 61 | 1018 |
| 11:00 | 18:00 | 20.2°C | 19.1°C | 0 | 1.4 | SE | 49 | 1018 |
| 12:00 | 19:00 | 21.8°C | 20.3°C | 0 | 1.5 | SE | 42 | 1017 |
| 13:00 | 20:00 | 23.1°C | 21.7°C | 0 | 1.5 | SSE | 39 | 1017 |
| 14:00 | 21:00 | 23.6°C | 22.2°C | 0 | 1.6 | S | 39 | 1016 |
| 15:00 | 22:00 | 23.3°C | 21.8°C | 0 | 2 | SW | 42 | 1015 |
| 16:00 | 23:00 | 22°C | 20.6°C | 0 | 2.3 | WSW | 49 | 1015 |
| 17:00 | 00:00 | 20.1°C | 18.9°C | 0 | 2.5 | WSW | 58 | 1014 |
| 18:00 | 01:00 | 18.1°C | 17.5°C | 0 | 2.1 | WSW | 72 | 1014 |
| 19:00 | 02:00 | 14.9°C | 14.2°C | 0 | 2.1 | WSW | 85 | 1015 |
| 20:00 | 03:00 | 14.2°C | 13.6°C | 0 | 1.8 | WSW | 87 | 1015 |
| 21:00 | 04:00 | 14°C | 13.6°C | 0 | 1.5 | WSW | 90 | 1016 |
| 22:00 | 05:00 | 13.3°C | 13°C | 0 | 1.4 | SW | 93 | 1016 |
| 23:00 | 06:00 | 13.5°C | 13.1°C | 0.14 | 1.5 | WSW | 92 | 1016 |
Nearby cities
Need this verified for an official or legal purpose? Request a weather verification report.
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
- Cotati — 38.250°, -122.750°, 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 21 October 2025 specifically — not a monthly average. See the Cotati 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 (2026-07-21). Historical climate data for Cotati, United States (38.25°N, 122.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Cotati, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Cotati, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Cotati, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.