Napa
United States · 24 October 2021
← 23 October 202125 October 2021 →
Average
15.3°C
low 13.7° · high 16.7°
Rainfall
102.9mm
rain recorded
Wind
5.4m/s
daily average
Humidity
92.4%
daily average
Cloud
100%
cover
Pressure
1004hPa
daily average
The temperature ranged from 13.7°C around 23:00 to 16.7°C around 11:00. Rain was recorded across 24 hours, from around 00:00 to 23:00 (102.9mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
0th percentile
Low temperature
89th percentile
Rainfall
100th percentile
Wind
99th 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 16.8°C, versus 15.3°C on this specific day.
Sun & daylight
Sunrise
07:27
Sunset
18:18
Day length
10h 51m
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 | 14.8 | 13.3 | 2.29 | 3.3 | SSE | 87 | 1010 |
| 01:00 | 08:00 | 14.7 | 12.7 | 3.47 | 4 | SSE | 88 | 1008 |
| 02:00 | 09:00 | 14.8 | 12.4 | 2.89 | 4.6 | SSE | 88 | 1007 |
| 03:00 | 10:00 | 14.2 | 11.8 | 2.17 | 5 | SSE | 95 | 1006 |
| 04:00 | 11:00 | 14.8 | 12.1 | 3.55 | 5.6 | S | 95 | 1005 |
| 05:00 | 12:00 | 15 | 12 | 4.34 | 6.2 | S | 94 | 1004 |
| 06:00 | 13:00 | 15.1 | 11.7 | 5 | 6.7 | S | 94 | 1003 |
| 07:00 | 14:00 | 15.3 | 11.6 | 4.67 | 7.3 | S | 94 | 1003 |
| 08:00 | 15:00 | 15.7 | 11.7 | 4.02 | 7.8 | S | 94 | 1002 |
| 09:00 | 16:00 | 16 | 12 | 4.1 | 8 | S | 92 | 1002 |
| 10:00 | 17:00 | 16.4 | 12.1 | 4.69 | 8.3 | S | 90 | 1002 |
| 11:00 | 18:00 | 16.7 | 12.3 | 5.45 | 8.5 | S | 89 | 1002 |
| 12:00 | 19:00 | 16.6 | 12.2 | 5.26 | 8.6 | SSW | 90 | 1002 |
| 13:00 | 20:00 | 16.5 | 12.5 | 6.81 | 8.1 | SSW | 91 | 1002 |
| 14:00 | 21:00 | 16.4 | 13.9 | 7.03 | 6.1 | SSW | 93 | 1002 |
| 15:00 | 22:00 | 16.2 | 14.4 | 7.02 | 4.9 | SW | 94 | 1002 |
| 16:00 | 23:00 | 15.9 | 14.6 | 6.51 | 4.1 | SW | 94 | 1002 |
| 17:00 | 00:00 | 15.7 | 13.8 | 5.11 | 4.7 | WSW | 91 | 1002 |
| 18:00 | 01:00 | 15.5 | 15 | 3.85 | 2.7 | WSW | 93 | 1002 |
| 19:00 | 02:00 | 15 | 14.5 | 3.56 | 2.7 | SW | 94 | 1003 |
| 20:00 | 03:00 | 14.1 | 13.1 | 3.42 | 3 | SW | 96 | 1003 |
| 21:00 | 04:00 | 14 | 12.9 | 2.89 | 3 | SW | 95 | 1003 |
| 22:00 | 05:00 | 13.8 | 12.7 | 2.33 | 2.7 | SSW | 93 | 1004 |
| 23:00 | 06:00 | 13.7 | 12.4 | 2.46 | 2.8 | SSW | 92 | 1004 |
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
- Napa — 38.250°, -122.250°, ERA5 grid cell center, 6.1 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 24 October 2021 specifically — not a monthly average. See the Napa 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 (2026-07-16). Historical climate data for Napa, United States (38.25°N, 122.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Napa, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 16, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Napa, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 16, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Napa, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-16},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.