Home / Berkeley / 4 September 2018
Berkeley
United States · 4 September 2018
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Average
27.7°C
low 22.2° · high 32.5°
Rainfall
0mm
dry day
Wind
2.9m/s
daily average
Humidity
67%
daily average
Cloud
22%
cover
Pressure
1020hPa
daily average
The temperature ranged from 22.2°C around 05:00 to 32.5°C around 15:00. 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
93th percentile
Low temperature
88th percentile
Rainfall
49th percentile
Wind
69th 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 22.5°C, versus 27.7°C on this specific day.
Sun & daylight
Sunrise
06:32
Sunset
19:26
Day length
12h 54m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Chicago.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 25.7 | 28.1 | 0 | 2.4 | SSE | 75 | 1021 |
| 01:00 | 06:00 | 25.2 | 27.8 | 0 | 2.2 | SE | 77 | 1021 |
| 02:00 | 07:00 | 25 | 27.7 | 0 | 2 | SSE | 78 | 1020 |
| 03:00 | 08:00 | 24.6 | 27.6 | 0 | 1.8 | SE | 80 | 1020 |
| 04:00 | 09:00 | 24.6 | 27.7 | 0 | 1.6 | SE | 81 | 1020 |
| 05:00 | 10:00 | 22.2 | 25.2 | 0 | 1.8 | SSE | 95 | 1020 |
| 06:00 | 11:00 | 22.4 | 25.6 | 0 | 1.6 | SSE | 93 | 1021 |
| 07:00 | 12:00 | 22.5 | 25.4 | 0 | 1.7 | SSE | 91 | 1021 |
| 08:00 | 13:00 | 24.4 | 27.6 | 0 | 2.3 | SSE | 87 | 1021 |
| 09:00 | 14:00 | 26.3 | 29.6 | 0 | 2.3 | SSE | 79 | 1021 |
| 10:00 | 15:00 | 29.4 | 31.5 | 0 | 2.6 | S | 59 | 1021 |
| 11:00 | 16:00 | 30.8 | 33.2 | 0.01 | 3 | S | 58 | 1021 |
| 12:00 | 17:00 | 31.9 | 33.8 | 0.02 | 3.3 | S | 53 | 1021 |
| 13:00 | 18:00 | 32.4 | 34 | 0 | 3.8 | S | 52 | 1021 |
| 14:00 | 19:00 | 32.4 | 33.6 | 0 | 4.1 | S | 51 | 1020 |
| 15:00 | 20:00 | 32.5 | 33.4 | 0 | 4.5 | SSE | 50 | 1019 |
| 16:00 | 21:00 | 32.5 | 33 | 0 | 4.9 | S | 50 | 1018 |
| 17:00 | 22:00 | 31.7 | 32.4 | 0 | 4.2 | S | 50 | 1018 |
| 18:00 | 23:00 | 31.5 | 32.7 | 0 | 3.4 | SSE | 49 | 1017 |
| 19:00 | 00:00 | 30.4 | 31.8 | 0 | 3 | SSE | 52 | 1017 |
| 20:00 | 01:00 | 28.1 | 29.4 | 0 | 2.4 | SSE | 55 | 1018 |
| 21:00 | 02:00 | 27.3 | 28 | 0 | 3.3 | SSE | 59 | 1018 |
| 22:00 | 03:00 | 25.8 | 26.8 | 0 | 3.3 | SSE | 66 | 1019 |
| 23:00 | 04:00 | 25.9 | 27.1 | 0 | 3.1 | SSE | 68 | 1019 |
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
- Berkeley — 38.750°, -90.250°, ERA5 grid cell center, 7.1 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 4 September 2018 specifically — not a monthly average. See the Berkeley 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 (2026-07-18). Historical climate data for Berkeley, United States (38.75°N, 90.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Berkeley, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Berkeley, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Berkeley, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.