Home / Windham / 15 December 2021
Windham
United States · 15 December 2021
← 14 December 202116 December 2021 →
Average
2.9°C
low -3.8°C · high 8.4°C
Rainfall
1.4mm
rain recorded
Wind
2.8m/s
daily average
Humidity
61.3%
daily average
Cloud
89%
cover
Pressure
1036hPa
daily average
The temperature ranged from -3.8°C around 07:00 to 8.4°C around 23:00. Rain was recorded across 5 hours, from around 18:00 to 22:00 (1.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
80th percentile
Low temperature
49th percentile
Rainfall
69th percentile
Wind
35th 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 0.3°C, versus 2.9°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 | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 0.2°C | -4.4°C | 0 | 2.3 | NNE | 51 | 1039 |
| 01:00 | 06:00 | -0.2°C | -5.1°C | 0 | 2.6 | NE | 50 | 1039 |
| 02:00 | 07:00 | -0.5°C | -5.4°C | 0 | 2.6 | NE | 47 | 1039 |
| 03:00 | 08:00 | -0.8°C | -5.6°C | 0 | 2.4 | NE | 47 | 1039 |
| 04:00 | 09:00 | -1.9°C | -6.5°C | 0 | 2.1 | NE | 52 | 1040 |
| 05:00 | 10:00 | -3.2°C | -7.5°C | 0 | 1.8 | NE | 61 | 1039 |
| 06:00 | 11:00 | -3.4°C | -7.7°C | 0 | 1.8 | NE | 60 | 1039 |
| 07:00 | 12:00 | -3.8°C | -8.1°C | 0 | 1.8 | ENE | 61 | 1040 |
| 08:00 | 13:00 | -2.7°C | -6.7°C | 0 | 1.5 | E | 59 | 1040 |
| 09:00 | 14:00 | -0.3°C | -4.2°C | 0 | 1.2 | E | 51 | 1039 |
| 10:00 | 15:00 | 2°C | -2.1°C | 0 | 1.5 | ESE | 43 | 1039 |
| 11:00 | 16:00 | 3.6°C | -0.6°C | 0 | 1.7 | SE | 42 | 1038 |
| 12:00 | 17:00 | 5.3°C | 1.2°C | 0 | 2 | SSE | 45 | 1037 |
| 13:00 | 18:00 | 6.5°C | 2.2°C | 0 | 2.7 | SSE | 51 | 1036 |
| 14:00 | 19:00 | 7.4°C | 3°C | 0 | 3.2 | SSE | 54 | 1035 |
| 15:00 | 20:00 | 7.6°C | 3.6°C | 0 | 2.7 | SSE | 56 | 1035 |
| 16:00 | 21:00 | 7°C | 2.8°C | 0 | 3.2 | SE | 59 | 1034 |
| 17:00 | 22:00 | 6.5°C | 2.5°C | 0.01 | 3 | SE | 67 | 1033 |
| 18:00 | 23:00 | 6.6°C | 2.7°C | 0.24 | 3.1 | SSE | 72 | 1033 |
| 19:00 | 00:00 | 6.2°C | 2.2°C | 0.35 | 3.6 | SSE | 83 | 1032 |
| 20:00 | 01:00 | 6.2°C | 2.1°C | 0.28 | 4 | SSE | 87 | 1030 |
| 21:00 | 02:00 | 6.5°C | 2.2°C | 0.26 | 4.6 | SSE | 90 | 1029 |
| 22:00 | 03:00 | 7.4°C | 2.9°C | 0.14 | 5.2 | SSE | 91 | 1027 |
| 23:00 | 04:00 | 8.4°C | 3.9°C | 0.07 | 5.4 | S | 92 | 1026 |
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
- Windham — 41.750°, -72.250°, ERA5 grid cell center, 9.5 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 15 December 2021 specifically — not a monthly average. See the Windham 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 (2026-07-21). Historical climate data for Windham, 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 Windham, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Windham, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Windham, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.