Home / Berkeley / 1 September 2021
Berkeley
United States · 1 September 2021
← 31 August 20212 September 2021 →
Average
23.1°C
low 19.8°C · high 28.1°C
Rainfall
6.5mm
rain recorded
Wind
2.9m/s
daily average
Humidity
76.7%
daily average
Cloud
56%
cover
Pressure
1011hPa
daily average
The temperature ranged from 19.8°C around 08:00 to 28.1°C around 16:00. Rain was recorded across 9 hours, from around 00:00 to 08:00 (6.5mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
50th percentile
Low temperature
57th percentile
Rainfall
88th percentile
Wind
73th 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 23.3°C, versus 23.1°C on this specific day.
Sun & daylight
Sunrise
06:30
Sunset
19:30
Day length
13h 0m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Chicago.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 21.9°C | 24.9°C | 0.45 | 1.8 | NNE | 96 | 1007 |
| 01:00 | 06:00 | 21.6°C | 24.4°C | 0.46 | 2 | NNE | 96 | 1007 |
| 02:00 | 07:00 | 21.6°C | 24.4°C | 0.86 | 1.9 | NNE | 96 | 1007 |
| 03:00 | 08:00 | 21.2°C | 23.6°C | 1.05 | 2.2 | NE | 96 | 1007 |
| 04:00 | 09:00 | 21.5°C | 23.6°C | 1.13 | 2.6 | NE | 94 | 1008 |
| 05:00 | 10:00 | 20.2°C | 21.6°C | 1.01 | 2.8 | NNE | 94 | 1008 |
| 06:00 | 11:00 | 19.9°C | 21°C | 0.69 | 3 | NNE | 94 | 1009 |
| 07:00 | 12:00 | 19.9°C | 20.8°C | 0.41 | 3.2 | NNE | 93 | 1010 |
| 08:00 | 13:00 | 19.8°C | 20.6°C | 0.39 | 3.1 | NNE | 93 | 1011 |
| 09:00 | 14:00 | 20.1°C | 21.2°C | 0.08 | 2.9 | NNE | 92 | 1012 |
| 10:00 | 15:00 | 21.6°C | 22.9°C | 0 | 2.7 | NNE | 85 | 1012 |
| 11:00 | 16:00 | 22.3°C | 23.4°C | 0 | 2.9 | NE | 81 | 1013 |
| 12:00 | 17:00 | 24.4°C | 25.6°C | 0 | 2.9 | NNE | 72 | 1013 |
| 13:00 | 18:00 | 26.3°C | 27.3°C | 0 | 3 | NE | 63 | 1013 |
| 14:00 | 19:00 | 27.4°C | 27.9°C | 0 | 3.2 | NE | 56 | 1013 |
| 15:00 | 20:00 | 27.8°C | 27.8°C | 0 | 3.4 | NNE | 52 | 1012 |
| 16:00 | 21:00 | 28.1°C | 28°C | 0 | 3.6 | NNE | 51 | 1012 |
| 17:00 | 22:00 | 27.5°C | 27.4°C | 0 | 3.3 | NNE | 52 | 1012 |
| 18:00 | 23:00 | 27°C | 26.7°C | 0 | 3.5 | NE | 53 | 1013 |
| 19:00 | 00:00 | 25.9°C | 25.9°C | 0 | 3.2 | NE | 57 | 1013 |
| 20:00 | 01:00 | 24.6°C | 24.6°C | 0 | 3.2 | NE | 62 | 1013 |
| 21:00 | 02:00 | 23.1°C | 23.1°C | 0 | 3.2 | NE | 68 | 1014 |
| 22:00 | 03:00 | 20.8°C | 20.6°C | 0 | 3 | ENE | 72 | 1015 |
| 23:00 | 04:00 | 20.4°C | 20.1°C | 0 | 2.8 | ENE | 73 | 1015 |
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 1 September 2021 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 (2026-07-20). 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 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Berkeley, 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 Berkeley, 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.