Home / Worcester / 9 December 2017
Worcester
United States · 9 December 2017
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Average
-1°C
low -1.9° · high -0.1°
Rainfall
11.6mm
rain recorded
Wind
2.1m/s
daily average
Humidity
78.8%
daily average
Cloud
100%
cover
Pressure
1011hPa
daily average
The temperature ranged from -1.9°C around 18:00 to -0.1°C around 02:00. Rain was recorded across 15 hours, from around 09:00 to 23:00 (11.6mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
13th percentile
Low temperature
60th percentile
Rainfall
90th percentile
Wind
7th 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 0.8°C, versus -1°C on this specific day.
Sun & daylight
Sunrise
07:04
Sunset
16:14
Day length
9h 10m
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 | 05:00 | -0.2 | -4 | 0 | 1.4 | SW | 60 | 1015 |
| 01:00 | 06:00 | -0.3 | -4.1 | 0 | 1.4 | SW | 61 | 1014 |
| 02:00 | 07:00 | -0.1 | -4.1 | 0 | 1.6 | SW | 60 | 1015 |
| 03:00 | 08:00 | -0.3 | -4.1 | 0.01 | 1.4 | SW | 61 | 1015 |
| 04:00 | 09:00 | -0.5 | -4.1 | 0.01 | 1.2 | WSW | 64 | 1015 |
| 05:00 | 10:00 | -0.5 | -3.6 | 0.02 | 0.5 | WNW | 66 | 1015 |
| 06:00 | 11:00 | -0.4 | -3.4 | 0.04 | 0.4 | S | 65 | 1014 |
| 07:00 | 12:00 | -0.5 | -3.6 | 0.05 | 0.6 | NW | 67 | 1015 |
| 08:00 | 13:00 | -0.3 | -3.8 | 0.06 | 1 | NNW | 63 | 1016 |
| 09:00 | 14:00 | -0.2 | -3.8 | 0.13 | 1.3 | N | 64 | 1015 |
| 10:00 | 15:00 | -0.3 | -4.3 | 0.24 | 1.9 | NE | 71 | 1013 |
| 11:00 | 16:00 | -0.8 | -3.7 | 0.54 | 0.5 | NNE | 79 | 1014 |
| 12:00 | 17:00 | -1.2 | -4.5 | 0.77 | 1.2 | NNE | 87 | 1013 |
| 13:00 | 18:00 | -1.5 | -5.4 | 0.85 | 2.3 | NE | 90 | 1012 |
| 14:00 | 19:00 | -1.5 | -5.6 | 0.82 | 2.5 | NE | 91 | 1011 |
| 15:00 | 20:00 | -1.7 | -6 | 1.27 | 2.8 | NNE | 92 | 1010 |
| 16:00 | 21:00 | -1.6 | -6.1 | 1.06 | 3 | NNE | 92 | 1009 |
| 17:00 | 22:00 | -1.8 | -6.7 | 1.18 | 3.6 | NNE | 94 | 1008 |
| 18:00 | 23:00 | -1.9 | -6.8 | 1 | 3.6 | N | 94 | 1007 |
| 19:00 | 00:00 | -1.9 | -7 | 0.94 | 3.9 | N | 94 | 1007 |
| 20:00 | 01:00 | -1.7 | -6.6 | 0.82 | 3.7 | N | 94 | 1005 |
| 21:00 | 02:00 | -1.7 | -6.6 | 0.64 | 3.7 | N | 94 | 1005 |
| 22:00 | 03:00 | -1.5 | -6.2 | 0.59 | 3.4 | NNW | 93 | 1005 |
| 23:00 | 04:00 | -1.3 | -5.9 | 0.56 | 3.3 | NNW | 93 | 1005 |
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
- Worcester — 42.250°, -71.750°, ERA5 grid cell center, 4.5 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 9 December 2017 specifically — not a monthly average. See the Worcester 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 Worcester, United States (42.25°N, 71.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Worcester, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Worcester, 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 Worcester, 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.