Home / Cotati / 21 October 2018
Cotati
United States · 21 October 2018
← 20 October 201822 October 2018 →
Average
13°C
low 9.4°C · high 18.8°C
Rainfall
0mm
dry day
Wind
1.6m/s
daily average
Humidity
85.4%
daily average
Cloud
38%
cover
Pressure
1014hPa
daily average
The temperature ranged from 9.4°C around 08:00 to 18.8°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
28th percentile
Low temperature
30th percentile
Rainfall
69th percentile
Wind
37th 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 15.6°C, versus 13°C on this specific day.
Sun & daylight
Sunrise
07:25
Sunset
18:24
Day length
10h 59m
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 | 12.3°C | 11.8°C | 0 | 1.3 | WSW | 95 | 1015 |
| 01:00 | 08:00 | 12°C | 11.5°C | 0 | 1.3 | WSW | 97 | 1015 |
| 02:00 | 09:00 | 11.4°C | 10.8°C | 0 | 1.3 | WSW | 98 | 1015 |
| 03:00 | 10:00 | 10.3°C | 9.4°C | 0 | 1.4 | W | 98 | 1015 |
| 04:00 | 11:00 | 10.2°C | 9.5°C | 0 | 1 | W | 98 | 1015 |
| 05:00 | 12:00 | 9.9°C | 9.3°C | 0 | 0.8 | W | 98 | 1015 |
| 06:00 | 13:00 | 9.6°C | 8.8°C | 0 | 0.8 | W | 96 | 1015 |
| 07:00 | 14:00 | 9.5°C | 8.6°C | 0 | 1 | W | 96 | 1015 |
| 08:00 | 15:00 | 9.4°C | 8.1°C | 0.01 | 1.3 | WNW | 92 | 1016 |
| 09:00 | 16:00 | 10.2°C | 9°C | 0 | 1.4 | WNW | 92 | 1016 |
| 10:00 | 17:00 | 11.1°C | 10.3°C | 0 | 1.2 | WNW | 93 | 1016 |
| 11:00 | 18:00 | 12.7°C | 12.1°C | 0 | 1.1 | W | 86 | 1016 |
| 12:00 | 19:00 | 15°C | 14.3°C | 0 | 1.3 | WSW | 76 | 1015 |
| 13:00 | 20:00 | 16.7°C | 15.9°C | 0 | 1.5 | WSW | 68 | 1015 |
| 14:00 | 21:00 | 18.3°C | 17°C | 0 | 1.7 | WSW | 56 | 1014 |
| 15:00 | 22:00 | 18.8°C | 17.6°C | 0 | 1.9 | W | 58 | 1013 |
| 16:00 | 23:00 | 18.5°C | 17.1°C | 0 | 2.3 | W | 61 | 1013 |
| 17:00 | 00:00 | 17.5°C | 16.1°C | 0 | 2.6 | W | 66 | 1013 |
| 18:00 | 01:00 | 16.3°C | 15.1°C | 0 | 2.2 | W | 72 | 1013 |
| 19:00 | 02:00 | 14°C | 12.7°C | 0 | 2.2 | W | 81 | 1013 |
| 20:00 | 03:00 | 12.6°C | 11.4°C | 0 | 2.4 | W | 92 | 1013 |
| 21:00 | 04:00 | 12.1°C | 10.7°C | 0 | 2.6 | W | 93 | 1013 |
| 22:00 | 05:00 | 12°C | 10.8°C | 0 | 2.1 | W | 94 | 1014 |
| 23:00 | 06:00 | 11.6°C | 10.7°C | 0 | 1.7 | WSW | 95 | 1014 |
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
- 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 2018 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 (2026-07-19). 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 19, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Cotati, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 19, 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 2026-07-19},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.