Home / Walnut / 4 February 2019
Walnut
United States · 4 February 2019
← 3 February 20195 February 2019 →
Average
10.2°C
low 8.7°C · high 11.6°C
Rainfall
25.9mm
rain recorded
Wind
2.4m/s
daily average
Humidity
88.9%
daily average
Cloud
92%
cover
Pressure
1011hPa
daily average
The temperature ranged from 8.7°C around 22:00 to 11.6°C around 15:00. Rain was recorded across 24 hours, from around 00:00 to 23:00 (25.9mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
5th percentile
Low temperature
63th percentile
Rainfall
97th percentile
Wind
90th 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 12.9°C, versus 10.2°C on this specific day.
Sun & daylight
Sunrise
06:45
Sunset
17:24
Day length
10h 39m
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 | 08:00 | 10.1°C | 9°C | 0.36 | 1.3 | S | 94 | 1013 |
| 01:00 | 09:00 | 10°C | 8.6°C | 0.25 | 1.4 | S | 89 | 1012 |
| 02:00 | 10:00 | 9.5°C | 8.2°C | 0.37 | 1.4 | SE | 95 | 1012 |
| 03:00 | 11:00 | 9.7°C | 8.4°C | 0.36 | 1.3 | SSE | 93 | 1012 |
| 04:00 | 12:00 | 9.8°C | 8.6°C | 0.66 | 1.2 | SSE | 93 | 1011 |
| 05:00 | 13:00 | 9.5°C | 8.2°C | 0.96 | 1.2 | SSE | 91 | 1011 |
| 06:00 | 14:00 | 9.5°C | 7.9°C | 0.92 | 1.7 | S | 92 | 1011 |
| 07:00 | 15:00 | 10.1°C | 8.1°C | 1.01 | 2 | SSW | 85 | 1011 |
| 08:00 | 16:00 | 9.9°C | 7.7°C | 0.4 | 2.5 | SSW | 89 | 1011 |
| 09:00 | 17:00 | 10.9°C | 8.5°C | 0.63 | 3.1 | SSW | 88 | 1011 |
| 10:00 | 18:00 | 11°C | 8.2°C | 1.44 | 3.6 | SSW | 86 | 1012 |
| 11:00 | 19:00 | 11.4°C | 8.1°C | 1.56 | 4.5 | SSW | 86 | 1011 |
| 12:00 | 20:00 | 10.8°C | 7.7°C | 1.9 | 4.2 | SSW | 87 | 1011 |
| 13:00 | 21:00 | 11.2°C | 8.1°C | 2.35 | 4.2 | SW | 88 | 1010 |
| 14:00 | 22:00 | 11.3°C | 8.8°C | 2.06 | 3.6 | SW | 90 | 1010 |
| 15:00 | 23:00 | 11.6°C | 9.4°C | 2.44 | 3.2 | SW | 91 | 1009 |
| 16:00 | 00:00 | 11.6°C | 9.4°C | 2.11 | 3.1 | SW | 90 | 1010 |
| 17:00 | 01:00 | 11°C | 8.8°C | 1.83 | 3 | SW | 89 | 1009 |
| 18:00 | 02:00 | 10.3°C | 8.5°C | 0.99 | 2.1 | SW | 90 | 1010 |
| 19:00 | 03:00 | 10°C | 8.3°C | 0.97 | 1.7 | SW | 88 | 1010 |
| 20:00 | 04:00 | 9.4°C | 7.5°C | 0.78 | 1.6 | SW | 85 | 1011 |
| 21:00 | 05:00 | 9.3°C | 7.3°C | 0.33 | 1.8 | SW | 84 | 1011 |
| 22:00 | 06:00 | 8.7°C | 6.5°C | 0.33 | 2.1 | SW | 86 | 1011 |
| 23:00 | 07:00 | 9°C | 6.7°C | 0.85 | 2.1 | SW | 86 | 1012 |
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
- Walnut — 34.000°, -117.750°, ERA5 grid cell center, 10.9 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 4 February 2019 specifically — not a monthly average. See the Walnut 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 Walnut, United States (34.00°N, 117.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Walnut, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Walnut, 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 Walnut, 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.