Home / California / 25 September 2018
California
United States · 25 September 2018
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Average
19.8°C
low 16.6° · high 23.1°
Rainfall
20.9mm
rain recorded
Wind
3.9m/s
daily average
Humidity
90.8%
daily average
Cloud
98%
cover
Pressure
1020hPa
daily average
The temperature ranged from 16.6°C around 05:00 to 23.1°C around 18:00. Rain was recorded across 15 hours, from around 00:00 to 20:00 (20.9mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
42th percentile
Low temperature
72th percentile
Rainfall
96th percentile
Wind
93th 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 18.4°C, versus 19.8°C on this specific day.
Sun & daylight
Sunrise
07:10
Sunset
19:12
Day length
12h 2m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/New_York.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 04:00 | 17.3 | 15.5 | 1.77 | 5.5 | SE | 94 | 1023 |
| 01:00 | 05:00 | 17.1 | 15.3 | 1.92 | 5.5 | SE | 94 | 1022 |
| 02:00 | 06:00 | 16.8 | 15.1 | 1.12 | 5.2 | SE | 93 | 1022 |
| 03:00 | 07:00 | 16.8 | 15.3 | 2.72 | 4.8 | SE | 93 | 1022 |
| 04:00 | 08:00 | 16.8 | 15.7 | 2.35 | 4.3 | SSE | 94 | 1021 |
| 05:00 | 09:00 | 16.6 | 15.9 | 2.4 | 3.9 | SSE | 96 | 1021 |
| 06:00 | 10:00 | 17.6 | 17.3 | 1.51 | 3.7 | S | 95 | 1021 |
| 07:00 | 11:00 | 17.8 | 17.4 | 2.45 | 3.8 | S | 94 | 1021 |
| 08:00 | 12:00 | 17.9 | 17.7 | 0.47 | 3.7 | S | 94 | 1021 |
| 09:00 | 13:00 | 18.5 | 18.7 | 1.26 | 3.4 | S | 94 | 1021 |
| 10:00 | 14:00 | 19.5 | 20 | 0.72 | 3.5 | S | 93 | 1021 |
| 11:00 | 15:00 | 20.3 | 20.9 | 0.69 | 3.5 | S | 90 | 1021 |
| 12:00 | 16:00 | 21 | 21.9 | 0.41 | 3.6 | S | 91 | 1021 |
| 13:00 | 17:00 | 21.6 | 22.7 | 0.19 | 3.5 | SSW | 89 | 1020 |
| 14:00 | 18:00 | 22.1 | 23.1 | 0 | 3.7 | SSW | 87 | 1020 |
| 15:00 | 19:00 | 22.3 | 23 | 0.06 | 4 | SSW | 85 | 1019 |
| 16:00 | 20:00 | 22.4 | 23.5 | 0.01 | 3.5 | SSW | 84 | 1018 |
| 17:00 | 21:00 | 22 | 23.7 | 0 | 2.8 | S | 88 | 1018 |
| 18:00 | 22:00 | 23.1 | 24.8 | 0 | 2.9 | S | 83 | 1018 |
| 19:00 | 23:00 | 22.6 | 23.9 | 0.06 | 3.3 | S | 85 | 1017 |
| 20:00 | 00:00 | 21.4 | 22.7 | 0.77 | 3.2 | S | 90 | 1017 |
| 21:00 | 01:00 | 21.3 | 22.1 | 0.01 | 4.1 | S | 92 | 1018 |
| 22:00 | 02:00 | 21.5 | 22.2 | 0 | 4.3 | S | 91 | 1017 |
| 23:00 | 03:00 | 21.4 | 22 | 0 | 4.2 | S | 90 | 1016 |
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
- California — 40.000°, -80.000°, ERA5 grid cell center, 11.8 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 25 September 2018 specifically — not a monthly average. See the California 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 California, United States (40.00°N, 80.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for California, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 16, 2026, from https://www.pastclimate.com/
"Historical Climate Data for California, 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 California, 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.