Home / Blackhawk / 4 January 2017
Blackhawk
United States · 4 January 2017
← 3 January 20175 January 2017 →
Average
11.5°C
low 8.8° · high 13.3°
Rainfall
14.4mm
rain recorded
Wind
2.5m/s
daily average
Humidity
91.7%
daily average
Cloud
100%
cover
Pressure
1014hPa
daily average
The temperature ranged from 8.8°C around 23:00 to 13.3°C around 02:00. Rain was recorded across 22 hours, from around 00:00 to 23:00 (14.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
41th percentile
Low temperature
82th percentile
Rainfall
92th percentile
Wind
77th 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 9.7°C, versus 11.5°C on this specific day.
Sun & daylight
Sunrise
07:23
Sunset
17:02
Day length
9h 39m
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 | 13.1 | 9.1 | 1.8 | 6.4 | S | 89 | 1012 |
| 01:00 | 09:00 | 13.2 | 9.3 | 1.62 | 6.4 | SSW | 92 | 1012 |
| 02:00 | 10:00 | 13.3 | 9.8 | 1.71 | 6.1 | SSW | 96 | 1012 |
| 03:00 | 11:00 | 13.2 | 10.5 | 1.66 | 5.1 | SW | 97 | 1012 |
| 04:00 | 12:00 | 13.2 | 11.1 | 0.85 | 4.1 | SW | 97 | 1013 |
| 05:00 | 13:00 | 13.1 | 11.8 | 1.01 | 2.9 | SW | 97 | 1013 |
| 06:00 | 14:00 | 12.8 | 12.1 | 0.65 | 1.9 | SSW | 97 | 1013 |
| 07:00 | 15:00 | 12.2 | 11.3 | 0.56 | 1.9 | S | 95 | 1014 |
| 08:00 | 16:00 | 12.1 | 11.1 | 0.25 | 2 | S | 95 | 1014 |
| 09:00 | 17:00 | 12.2 | 11.6 | 0.12 | 1.5 | SSW | 96 | 1014 |
| 10:00 | 18:00 | 12.3 | 11.5 | 0.18 | 1.6 | WSW | 92 | 1015 |
| 11:00 | 19:00 | 12.1 | 11.5 | 0.44 | 1.3 | W | 92 | 1015 |
| 12:00 | 20:00 | 12.1 | 11.5 | 0.25 | 1.2 | W | 92 | 1015 |
| 13:00 | 21:00 | 11.9 | 11.4 | 0.18 | 1 | W | 91 | 1014 |
| 14:00 | 22:00 | 11.7 | 10 | 0.11 | 2.2 | WNW | 84 | 1014 |
| 15:00 | 23:00 | 11.4 | 9.7 | 0.1 | 2.2 | WNW | 85 | 1015 |
| 16:00 | 00:00 | 11 | 9.8 | 0.36 | 1.4 | NW | 87 | 1015 |
| 17:00 | 01:00 | 10.6 | 9.7 | 0.41 | 0.6 | NE | 87 | 1014 |
| 18:00 | 02:00 | 10 | 9.3 | 0.61 | 0.5 | NE | 89 | 1013 |
| 19:00 | 03:00 | 9.4 | 7.9 | 0.45 | 1.5 | NW | 93 | 1014 |
| 20:00 | 04:00 | 9.1 | 7.2 | 0.39 | 2 | NW | 92 | 1014 |
| 21:00 | 05:00 | 9.1 | 7.3 | 0.07 | 1.7 | NW | 89 | 1014 |
| 22:00 | 06:00 | 9 | 7.2 | 0.01 | 1.7 | WNW | 89 | 1015 |
| 23:00 | 07:00 | 8.8 | 6.8 | 0.61 | 1.9 | NW | 90 | 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
- Blackhawk — 37.750°, -122.000°, ERA5 grid cell center, 11.3 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 4 January 2017 specifically — not a monthly average. See the Blackhawk 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 (2026-07-17). Historical climate data for Blackhawk, United States (37.75°N, 122.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Blackhawk, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Blackhawk, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Blackhawk, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-17},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.