Home / Willimantic / 12 December 2017
Willimantic
United States · 12 December 2017
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Average
2.4°C
low -1°C · high 6°C
Rainfall
5.7mm
rain recorded
Wind
3.3m/s
daily average
Humidity
83.9%
daily average
Cloud
98%
cover
Pressure
1003hPa
daily average
The temperature ranged from -1°C around 00:00 to 6°C around 12:00. Rain was recorded across 9 hours, from around 09:00 to 17:00 (5.7mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
61th percentile
Low temperature
65th percentile
Rainfall
80th percentile
Wind
53th 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 1.2°C, versus 2.4°C on this specific day.
Sun & daylight
Sunrise
07:07
Sunset
16:18
Day length
9h 11m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/New_York.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | -1°C | -5.5°C | 0 | 2.6 | ESE | 73 | 1015 |
| 01:00 | 06:00 | -0.7°C | -5.1°C | 0.01 | 2.7 | ESE | 73 | 1014 |
| 02:00 | 07:00 | -0.2°C | -4.8°C | 0 | 2.9 | ESE | 74 | 1014 |
| 03:00 | 08:00 | 0.1°C | -4.3°C | 0.01 | 2.8 | ESE | 76 | 1013 |
| 04:00 | 09:00 | 0.6°C | -3.7°C | 0.02 | 2.7 | ESE | 80 | 1011 |
| 05:00 | 10:00 | 1°C | -3.2°C | 0.03 | 2.8 | ESE | 85 | 1011 |
| 06:00 | 11:00 | 1°C | -3.5°C | 0.04 | 3.4 | ESE | 85 | 1010 |
| 07:00 | 12:00 | 1°C | -3.6°C | 0.04 | 3.5 | ESE | 85 | 1008 |
| 08:00 | 13:00 | 2°C | -2.5°C | 0.05 | 3.5 | ESE | 84 | 1007 |
| 09:00 | 14:00 | 3.2°C | -1.5°C | 0.24 | 3.9 | SE | 80 | 1006 |
| 10:00 | 15:00 | 4.7°C | 0.3°C | 0.51 | 3.8 | SE | 80 | 1004 |
| 11:00 | 16:00 | 5.5°C | 1.1°C | 0.51 | 4.1 | SE | 82 | 1002 |
| 12:00 | 17:00 | 6°C | 1.8°C | 0.49 | 3.9 | SE | 84 | 1000 |
| 13:00 | 18:00 | 5.8°C | 1.9°C | 0.21 | 3.5 | SSE | 87 | 998 |
| 14:00 | 19:00 | 5.8°C | 2.3°C | 1.5 | 3.1 | SSE | 90 | 997 |
| 15:00 | 20:00 | 5.4°C | 2.8°C | 1.21 | 1.8 | S | 92 | 996 |
| 16:00 | 21:00 | 4.9°C | 2.3°C | 0.56 | 1.9 | W | 93 | 995 |
| 17:00 | 22:00 | 4.1°C | 1.2°C | 0.18 | 2 | NW | 91 | 994 |
| 18:00 | 23:00 | 3.5°C | -0.2°C | 0.06 | 2.9 | WNW | 90 | 995 |
| 19:00 | 00:00 | 2.4°C | -1.6°C | 0.02 | 3.1 | WNW | 90 | 995 |
| 20:00 | 01:00 | 2°C | -2.8°C | 0.01 | 4 | WNW | 91 | 994 |
| 21:00 | 02:00 | 1°C | -4.7°C | 0 | 5.1 | WNW | 87 | 995 |
| 22:00 | 03:00 | -0.4°C | -6.2°C | 0 | 4.9 | NW | 82 | 995 |
| 23:00 | 04:00 | -1°C | -7°C | 0 | 5 | NW | 80 | 995 |
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
- Willimantic — 41.750°, -72.250°, ERA5 grid cell center, 5.6 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 12 December 2017 specifically — not a monthly average. See the Willimantic 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 Willimantic, United States (41.75°N, 72.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Willimantic, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Willimantic, 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 Willimantic, 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.