Home / Hayward / 1 January 2017
Hayward
United States · 1 January 2017
← 31 December 20162 January 2017 →
Average
8.4°C
low 6.1° · high 11.3°
Rainfall
0.1mm
dry day
Wind
3.2m/s
daily average
Humidity
74.2%
daily average
Cloud
43%
cover
Pressure
1014hPa
daily average
The temperature ranged from 6.1°C around 23:00 to 11.3°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
10th percentile
Low temperature
54th percentile
Rainfall
52th percentile
Wind
86th 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 9.5°C, versus 8.4°C on this specific day.
Sun & daylight
Sunrise
07:23
Sunset
17:00
Day length
9h 37m
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 | 7.3 | 4.6 | 0 | 2.5 | SSW | 89 | 1015 |
| 01:00 | 09:00 | 8.1 | 5.6 | 0 | 2.6 | SSW | 92 | 1014 |
| 02:00 | 10:00 | 8.9 | 5.7 | 0 | 3.7 | SW | 89 | 1014 |
| 03:00 | 11:00 | 9 | 6.2 | 0 | 3.2 | SW | 90 | 1014 |
| 04:00 | 12:00 | 8 | 5.2 | 0.01 | 2.9 | SSW | 91 | 1014 |
| 05:00 | 13:00 | 8 | 5.3 | 0.01 | 2.8 | SSW | 92 | 1014 |
| 06:00 | 14:00 | 7.9 | 5.2 | 0 | 2.8 | SSW | 92 | 1013 |
| 07:00 | 15:00 | 7.5 | 4.4 | 0 | 3.1 | SSW | 89 | 1014 |
| 08:00 | 16:00 | 7.5 | 4.3 | 0.01 | 3.1 | SSW | 86 | 1014 |
| 09:00 | 17:00 | 7.8 | 3.8 | 0 | 3.6 | SW | 73 | 1014 |
| 10:00 | 18:00 | 8.3 | 3.7 | 0 | 4.4 | WSW | 68 | 1014 |
| 11:00 | 19:00 | 8.9 | 4.1 | 0 | 4.5 | WSW | 64 | 1014 |
| 12:00 | 20:00 | 9.8 | 5.1 | 0 | 4.4 | WSW | 61 | 1014 |
| 13:00 | 21:00 | 11 | 6 | 0 | 4.4 | WSW | 51 | 1013 |
| 14:00 | 22:00 | 11.1 | 6.5 | 0 | 4.1 | WSW | 53 | 1013 |
| 15:00 | 23:00 | 11.3 | 6.6 | 0 | 4.2 | W | 50 | 1013 |
| 16:00 | 00:00 | 10.4 | 5.7 | 0 | 4.1 | W | 50 | 1013 |
| 17:00 | 01:00 | 9.6 | 5.1 | 0 | 3.8 | WSW | 54 | 1013 |
| 18:00 | 02:00 | 8.6 | 5 | 0 | 2.6 | WSW | 59 | 1013 |
| 19:00 | 03:00 | 7.4 | 3.9 | 0 | 2.5 | SW | 67 | 1014 |
| 20:00 | 04:00 | 6.9 | 3.6 | 0 | 2.4 | SW | 73 | 1015 |
| 21:00 | 05:00 | 6.5 | 3.3 | 0 | 2.3 | WSW | 78 | 1015 |
| 22:00 | 06:00 | 6.3 | 3.6 | 0.02 | 1.7 | SW | 80 | 1015 |
| 23:00 | 07:00 | 6.1 | 3.9 | 0.08 | 1.4 | SSW | 88 | 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
- Hayward — 37.750°, -122.000°, ERA5 grid cell center, 11.5 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 1 January 2017 specifically — not a monthly average. See the Hayward 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 Hayward, 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 Hayward, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Hayward, 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 Hayward, 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.