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Cotati

United States · 22 October 2023

CotatiUnited States6:38 AM localChange location

← 21 October 202323 October 2023 →

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Average

15.7°C

low 14° · high 17.2°

Rainfall

4.9mm

rain recorded

Wind

2.3m/s

daily average

Humidity

93.5%

daily average

Cloud

96%

cover

Pressure

1009hPa

daily average

The temperature ranged from 14°C around 01:00 to 17.2°C around 14:00. Rain was recorded across 13 hours, from around 03:00 to 17:00 (4.9mm total).

How unusual was this day?

Compared against the same 135 calendar days (±7 days) across the other 9 years on file.

High temperature

11th percentile

Low temperature

94th percentile

Rainfall

92th percentile

Wind

69th 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 15.5°C, versus 15.7°C on this specific day.

Sun & daylight

Sunrise

07:26

Sunset

18:23

Day length

10h 57m

Hour by hour

Temperature (line) and hourly rainfall (bars), local time — America/Los_Angeles.

↓ Download CSV
00:0006:0012:0018:0023:00

Cumulative rainfall through the day.

00:0006:0012:0018:0023:00
Local timeUTCTemp °CFeels °CRain mmWind m/sDirHumidity %Pressure hPa
00:0007:0014.214.20.011.3SW911012
01:0008:001414.20.040.9S911012
02:0009:0014.414.60.091.1SSE921011
03:0010:0014.914.60.151.7SE881011
04:0011:0014.914.20.172.5SE901011
05:0012:0015.114.20.212.8SE901010
06:0013:0014.613.70.22.9SE931010
07:0014:0014.513.60.282.9SE931010
08:0015:001514.10.463SE931010
09:0016:0015.614.90.433SE931009
10:0017:0016.215.70.453.1SE931009
11:0018:0016.316.30.432.7SSE961009
12:0019:0016.416.60.572.5S971009
13:0020:0016.216.50.092.5SSW991009
14:0021:0017.217.60.092.6SW971008
15:0022:0017.117.10.213.2W961008
16:0023:0016.916.80.642.9WSW941008
17:0000:0016.916.80.232.7WSW911008
18:0001:0016.816.60.062.7W921008
19:0002:0016.517.20.031.5WSW931008
20:0003:0015.916.50.031.6W951008
21:0004:001616.60.021.4W961008
22:0005:001616.70.011.6W951009
23:0006:0015.916.501.6NW951009

Same date, other years

202520242022202120202019201820172016

Nearby cities

Petaluma

0km away, same day

Rohnert Park

0km away, same day

Penngrove

0km away, same day

Agua Caliente

21.8km away, same day

Sonoma

21.8km away, same day

Boyes Hot Springs

21.8km away, same day

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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 22 October 2023 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

Plain text
PastClimate (2026-07-18). 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/
APA
PastClimate. (2026). Historical climate data for Cotati, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
MLA
"Historical Climate Data for Cotati, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 2026, www.pastclimate.com.
BibTeX
@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 2026-07-18},
  url = {https://www.pastclimate.com/}
}

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