Home / Willimantic / 9 December 2020
Willimantic
United States · 9 December 2020
← 8 December 202010 December 2020 →
Average
-1.7°C
low -5.3°C · high 1.9°C
Rainfall
0.3mm
dry day
Wind
2.2m/s
daily average
Humidity
73.5%
daily average
Cloud
69%
cover
Pressure
1009hPa
daily average
The temperature ranged from -5.3°C around 05:00 to 1.9°C around 13:00. Rain was recorded for one hour, around 15:00 (0.3mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
27th percentile
Low temperature
28th percentile
Rainfall
60th percentile
Wind
13th 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 1.3°C, versus -1.7°C on this specific day.
Sun & daylight
Sunrise
07:04
Sunset
16:18
Day length
9h 13m
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 | -4.2°C | -8.6°C | 0 | 2 | WNW | 66 | 1010 |
| 01:00 | 06:00 | -5°C | -9.4°C | 0 | 1.9 | WNW | 69 | 1010 |
| 02:00 | 07:00 | -5°C | -8.9°C | 0 | 1.3 | WSW | 69 | 1010 |
| 03:00 | 08:00 | -5.2°C | -9.4°C | 0 | 1.7 | SW | 71 | 1010 |
| 04:00 | 09:00 | -4.8°C | -9.1°C | 0 | 1.8 | WSW | 70 | 1010 |
| 05:00 | 10:00 | -5.3°C | -10°C | 0 | 2.5 | W | 78 | 1010 |
| 06:00 | 11:00 | -4.8°C | -9°C | 0 | 1.8 | W | 76 | 1010 |
| 07:00 | 12:00 | -4.6°C | -8.6°C | 0 | 1.6 | WSW | 76 | 1010 |
| 08:00 | 13:00 | -4°C | -8.1°C | 0 | 1.8 | WSW | 75 | 1010 |
| 09:00 | 14:00 | -2.3°C | -6.1°C | 0 | 1.6 | SW | 72 | 1010 |
| 10:00 | 15:00 | -0.2°C | -4.1°C | 0 | 1.7 | SW | 67 | 1010 |
| 11:00 | 16:00 | 1°C | -3.2°C | 0 | 2.2 | SW | 63 | 1009 |
| 12:00 | 17:00 | 1.7°C | -2.8°C | 0 | 2.7 | SW | 61 | 1008 |
| 13:00 | 18:00 | 1.9°C | -2.8°C | 0 | 3.1 | SW | 62 | 1007 |
| 14:00 | 19:00 | 1.8°C | -2.9°C | 0.07 | 3.1 | SW | 64 | 1006 |
| 15:00 | 20:00 | 1.3°C | -2.7°C | 0.11 | 2.2 | SW | 70 | 1006 |
| 16:00 | 21:00 | 0.9°C | -2.9°C | 0.09 | 2 | WSW | 74 | 1006 |
| 17:00 | 22:00 | -0.3°C | -4.1°C | 0.05 | 2 | WSW | 83 | 1006 |
| 18:00 | 23:00 | -0.5°C | -4.6°C | 0.01 | 2.4 | WSW | 82 | 1007 |
| 19:00 | 00:00 | -0.7°C | -4.8°C | 0 | 2.5 | W | 82 | 1007 |
| 20:00 | 01:00 | -0.5°C | -4.7°C | 0 | 2.5 | W | 82 | 1007 |
| 21:00 | 02:00 | -0.6°C | -4.7°C | 0 | 2.5 | W | 84 | 1008 |
| 22:00 | 03:00 | -0.4°C | -4.6°C | 0 | 2.6 | W | 83 | 1008 |
| 23:00 | 04:00 | -0.5°C | -4.7°C | 0 | 2.6 | W | 84 | 1008 |
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 9 December 2020 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 (2026-07-20). 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 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Willimantic, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 20, 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 2026-07-20},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.