Home / Simi Valley / 24 December 2019
Simi Valley
United States · 24 December 2019
← 23 December 201925 December 2019 →
Average
9.1°C
low 4.7° · high 13.4°
Rainfall
0.7mm
dry day
Wind
1.4m/s
daily average
Humidity
79.2%
daily average
Cloud
62%
cover
Pressure
1011hPa
daily average
The temperature ranged from 4.7°C around 06:00 to 13.4°C around 13:00. Rain was recorded across 2 hours, from around 22:00 to 23:00 (0.7mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
10th percentile
Low temperature
15th percentile
Rainfall
76th percentile
Wind
29th 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 12.2°C, versus 9.1°C on this specific day.
Sun & daylight
Sunrise
06:58
Sunset
16:50
Day length
9h 52m
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 | 08:00 | 9.6 | 7.9 | 0 | 1.3 | N | 79 | 1011 |
| 01:00 | 09:00 | 9.6 | 7.9 | 0 | 1.4 | N | 81 | 1011 |
| 02:00 | 10:00 | 7 | 4.9 | 0 | 1.6 | N | 95 | 1011 |
| 03:00 | 11:00 | 6.3 | 4.5 | 0 | 1 | N | 94 | 1011 |
| 04:00 | 12:00 | 5 | 2.8 | 0 | 1.4 | N | 95 | 1011 |
| 05:00 | 13:00 | 4.8 | 2.4 | 0.01 | 1.5 | NNE | 95 | 1011 |
| 06:00 | 14:00 | 4.7 | 2.3 | 0.07 | 1.5 | N | 94 | 1011 |
| 07:00 | 15:00 | 4.7 | 2.2 | 0 | 1.5 | N | 88 | 1012 |
| 08:00 | 16:00 | 5.1 | 2.4 | 0 | 1.9 | N | 88 | 1012 |
| 09:00 | 17:00 | 7.7 | 5.6 | 0 | 1.5 | N | 86 | 1013 |
| 10:00 | 18:00 | 10.2 | 8.8 | 0 | 0.9 | N | 78 | 1013 |
| 11:00 | 19:00 | 11.7 | 10.4 | 0 | 0.7 | WNW | 72 | 1012 |
| 12:00 | 20:00 | 12.7 | 10.8 | 0 | 1.5 | WSW | 65 | 1011 |
| 13:00 | 21:00 | 13.4 | 10.4 | 0.04 | 2.5 | WSW | 55 | 1010 |
| 14:00 | 22:00 | 13 | 10 | 0.06 | 2.7 | SW | 61 | 1010 |
| 15:00 | 23:00 | 12.6 | 9.7 | 0.04 | 2.7 | WSW | 64 | 1010 |
| 16:00 | 00:00 | 11.6 | 9.1 | 0.06 | 2.2 | WSW | 66 | 1011 |
| 17:00 | 01:00 | 10.8 | 9.3 | 0.04 | 0.9 | WSW | 72 | 1011 |
| 18:00 | 02:00 | 10.2 | 8.8 | 0.05 | 0.7 | NW | 77 | 1011 |
| 19:00 | 03:00 | 10.4 | 8.9 | 0.02 | 1 | NE | 75 | 1011 |
| 20:00 | 04:00 | 9.8 | 8.1 | 0.01 | 1.2 | ENE | 77 | 1011 |
| 21:00 | 05:00 | 9.6 | 8.2 | 0.04 | 0.8 | ENE | 79 | 1012 |
| 22:00 | 06:00 | 9.3 | 8 | 0.13 | 0.6 | E | 80 | 1012 |
| 23:00 | 07:00 | 8.8 | 7.7 | 0.14 | 0.3 | ENE | 83 | 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
- Simi Valley — 34.250°, -118.750°, ERA5 grid cell center, 3.6 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 24 December 2019 specifically — not a monthly average. See the Simi Valley 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 Simi Valley, United States (34.25°N, 118.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Simi Valley, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 16, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Simi Valley, 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 Simi Valley, 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.