Home / Sonoma / 22 October 2017
Sonoma
United States · 22 October 2017
← 21 October 201723 October 2017 →
Average
15.8°C
low 8.3°C · high 23.8°C
Rainfall
0mm
dry day
Wind
1.8m/s
daily average
Humidity
69.6%
daily average
Cloud
14%
cover
Pressure
1026hPa
daily average
The temperature ranged from 8.3°C around 08:00 to 23.8°C around 16:00. 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
65th percentile
Low temperature
19th percentile
Rainfall
78th percentile
Wind
52th 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 16.2°C, versus 15.8°C on this specific day.
Sun & daylight
Sunrise
07:26
Sunset
18:22
Day length
10h 56m
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 | 13.6°C | 12.6°C | 0 | 2 | NW | 87 | 1026 |
| 01:00 | 08:00 | 13°C | 11.8°C | 0 | 2.2 | NW | 87 | 1026 |
| 02:00 | 09:00 | 12°C | 10.7°C | 0 | 2.2 | NW | 92 | 1026 |
| 03:00 | 10:00 | 10.7°C | 9.3°C | 0 | 2 | NW | 92 | 1027 |
| 04:00 | 11:00 | 9.4°C | 7.7°C | 0 | 1.9 | NNW | 93 | 1027 |
| 05:00 | 12:00 | 8.6°C | 7°C | 0 | 1.4 | NNW | 94 | 1027 |
| 06:00 | 13:00 | 8.6°C | 7.1°C | 0 | 1.3 | NNW | 95 | 1027 |
| 07:00 | 14:00 | 8.6°C | 7°C | 0 | 1.6 | NNW | 94 | 1027 |
| 08:00 | 15:00 | 8.3°C | 6.4°C | 0 | 1.7 | NNW | 90 | 1027 |
| 09:00 | 16:00 | 11.6°C | 10.3°C | 0 | 1.3 | NNW | 80 | 1028 |
| 10:00 | 17:00 | 14.6°C | 13.6°C | 0 | 1.2 | NNW | 70 | 1028 |
| 11:00 | 18:00 | 17.1°C | 15.9°C | 0 | 1.3 | NW | 57 | 1028 |
| 12:00 | 19:00 | 19.1°C | 17.8°C | 0 | 1.6 | NW | 52 | 1028 |
| 13:00 | 20:00 | 21°C | 19.6°C | 0 | 2 | NW | 48 | 1027 |
| 14:00 | 21:00 | 22.5°C | 20.6°C | 0 | 2.2 | NW | 40 | 1026 |
| 15:00 | 22:00 | 23.5°C | 22°C | 0 | 1.7 | WNW | 39 | 1025 |
| 16:00 | 23:00 | 23.8°C | 22.3°C | 0 | 1.9 | WNW | 39 | 1025 |
| 17:00 | 00:00 | 23.6°C | 22°C | 0 | 2 | WNW | 40 | 1024 |
| 18:00 | 01:00 | 22.5°C | 21.5°C | 0 | 2 | WNW | 49 | 1024 |
| 19:00 | 02:00 | 19.8°C | 18.4°C | 0 | 1.9 | WNW | 52 | 1024 |
| 20:00 | 03:00 | 17.3°C | 16.4°C | 0 | 2 | NW | 69 | 1024 |
| 21:00 | 04:00 | 17°C | 16.3°C | 0 | 1.8 | NW | 71 | 1024 |
| 22:00 | 05:00 | 16.5°C | 15.6°C | 0 | 1.8 | NW | 71 | 1024 |
| 23:00 | 06:00 | 16.5°C | 15.6°C | 0 | 1.8 | NNW | 70 | 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
- Sonoma — 38.250°, -122.500°, ERA5 grid cell center, 5.9 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 22 October 2017 specifically — not a monthly average. See the Sonoma 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 (2026-07-20). Historical climate data for Sonoma, United States (38.25°N, 122.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Sonoma, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Sonoma, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 20, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Sonoma, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-20},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.