Home / Willimantic / 15 December 2017
Willimantic
United States · 15 December 2017
← 14 December 201716 December 2017 →
Average
-7.1°C
low -12° · high -3.5°
Rainfall
2.1mm
rain recorded
Wind
1.5m/s
daily average
Humidity
67.8%
daily average
Cloud
95%
cover
Pressure
1016hPa
daily average
The temperature ranged from -12°C around 06:00 to -3.5°C around 15:00. Rain was recorded across 7 hours, from around 16:00 to 22:00 (2.1mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
4th percentile
Low temperature
4th percentile
Rainfall
73th percentile
Wind
4th 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 0.9°C, versus -7.1°C on this specific day.
Sun & daylight
Sunrise
07:09
Sunset
16:19
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 | -8.8 | -14.2 | 0 | 2.8 | W | 51 | 1018 |
| 01:00 | 06:00 | -8.9 | -14 | 0 | 2.3 | W | 53 | 1018 |
| 02:00 | 07:00 | -8.9 | -14.1 | 0 | 2.5 | W | 55 | 1019 |
| 03:00 | 08:00 | -9.6 | -14.8 | 0 | 2.5 | W | 60 | 1019 |
| 04:00 | 09:00 | -10.6 | -15.5 | 0 | 2.2 | WSW | 65 | 1019 |
| 05:00 | 10:00 | -11.9 | -16.8 | 0 | 2 | WNW | 71 | 1019 |
| 06:00 | 11:00 | -12 | -16.6 | 0 | 1.6 | WNW | 72 | 1019 |
| 07:00 | 12:00 | -11.7 | -15.9 | 0 | 1.1 | W | 71 | 1019 |
| 08:00 | 13:00 | -10.6 | -14.6 | 0 | 0.9 | WSW | 69 | 1020 |
| 09:00 | 14:00 | -8.8 | -12.6 | 0 | 0.7 | SW | 65 | 1020 |
| 10:00 | 15:00 | -6.6 | -10.5 | 0 | 0.9 | SSW | 57 | 1020 |
| 11:00 | 16:00 | -5.2 | -9.2 | 0 | 1 | SSW | 53 | 1019 |
| 12:00 | 17:00 | -4.5 | -8.7 | 0 | 1.4 | S | 55 | 1018 |
| 13:00 | 18:00 | -4 | -8.5 | 0 | 1.9 | S | 57 | 1017 |
| 14:00 | 19:00 | -3.5 | -8.1 | 0.01 | 2.1 | S | 58 | 1016 |
| 15:00 | 20:00 | -3.5 | -7.9 | 0.05 | 2 | S | 60 | 1015 |
| 16:00 | 21:00 | -3.7 | -7.3 | 0.13 | 1 | SSE | 67 | 1014 |
| 17:00 | 22:00 | -4.8 | -8.3 | 0.21 | 0.9 | NE | 75 | 1013 |
| 18:00 | 23:00 | -5 | -8.3 | 0.27 | 0.5 | SSE | 77 | 1013 |
| 19:00 | 00:00 | -5.3 | -8.9 | 0.43 | 0.9 | S | 83 | 1013 |
| 20:00 | 01:00 | -5.2 | -8.4 | 0.41 | 0.6 | WSW | 86 | 1012 |
| 21:00 | 02:00 | -6.1 | -9.6 | 0.32 | 0.9 | WNW | 89 | 1012 |
| 22:00 | 03:00 | -5.4 | -9.4 | 0.2 | 1.7 | WNW | 90 | 1011 |
| 23:00 | 04:00 | -5.3 | -10 | 0.07 | 2.7 | WNW | 89 | 1011 |
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 15 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.