Home / Guildhall / 20 December 2021
Guildhall
United States · 20 December 2021
← 19 December 202121 December 2021 →
Average
-11.6°C
low -16.6°C · high -6.6°C
Rainfall
0mm
dry day
Wind
1.7m/s
daily average
Humidity
73.4%
daily average
Cloud
49%
cover
Pressure
1024hPa
daily average
The temperature ranged from -16.6°C around 05:00 to -6.6°C around 15:00. No measurable rain was recorded during the day.
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
24th percentile
Low temperature
30th percentile
Rainfall
18th percentile
Wind
25th 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 -7°C, versus -11.6°C on this specific day.
Sun & daylight
Sunrise
07:18
Sunset
16:08
Day length
8h 50m
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 | -13.2°C | -18°C | 0.01 | 2 | NW | 86 | 1027 |
| 01:00 | 06:00 | -13.7°C | -18.1°C | 0 | 1.4 | WNW | 87 | 1027 |
| 02:00 | 07:00 | -14.7°C | -19.1°C | 0 | 1.3 | WNW | 90 | 1027 |
| 03:00 | 08:00 | -16.2°C | -20.4°C | 0 | 1.1 | WNW | 94 | 1028 |
| 04:00 | 09:00 | -16.2°C | -20.6°C | 0 | 1.3 | WNW | 94 | 1028 |
| 05:00 | 10:00 | -16.6°C | -20.8°C | 0 | 1 | NW | 94 | 1028 |
| 06:00 | 11:00 | -16.4°C | -20.1°C | 0 | 0.3 | WNW | 94 | 1028 |
| 07:00 | 12:00 | -16.2°C | -20°C | 0 | 0.4 | WNW | 92 | 1028 |
| 08:00 | 13:00 | -16.2°C | -19.9°C | 0 | 0.3 | WSW | 89 | 1029 |
| 09:00 | 14:00 | -12.9°C | -16.8°C | 0 | 0.8 | SSE | 83 | 1028 |
| 10:00 | 15:00 | -11.8°C | -15.6°C | 0 | 0.6 | SSW | 77 | 1028 |
| 11:00 | 16:00 | -11.5°C | -15.5°C | 0 | 0.9 | SSW | 72 | 1027 |
| 12:00 | 17:00 | -7.3°C | -11.7°C | 0 | 1.4 | SW | 55 | 1026 |
| 13:00 | 18:00 | -6.7°C | -11.4°C | 0 | 1.9 | SW | 50 | 1025 |
| 14:00 | 19:00 | -6.8°C | -11.7°C | 0 | 2.1 | SSW | 50 | 1024 |
| 15:00 | 20:00 | -6.6°C | -11.5°C | 0 | 2.1 | S | 54 | 1023 |
| 16:00 | 21:00 | -7.7°C | -12.4°C | 0 | 1.9 | S | 55 | 1022 |
| 17:00 | 22:00 | -8.5°C | -13.5°C | 0 | 2.3 | S | 61 | 1022 |
| 18:00 | 23:00 | -9.3°C | -14.4°C | 0 | 2.4 | S | 61 | 1021 |
| 19:00 | 00:00 | -9.8°C | -15.1°C | 0 | 2.7 | S | 63 | 1020 |
| 20:00 | 01:00 | -10.3°C | -15.8°C | 0 | 3 | S | 65 | 1020 |
| 21:00 | 02:00 | -10°C | -15.7°C | 0 | 3.3 | S | 65 | 1018 |
| 22:00 | 03:00 | -10°C | -15.6°C | 0 | 3.2 | S | 66 | 1017 |
| 23:00 | 04:00 | -10.2°C | -15.9°C | 0 | 3.2 | SSW | 66 | 1017 |
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
- Guildhall — 44.500°, -71.500°, ERA5 grid cell center, 8.6 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 20 December 2021 specifically — not a monthly average. See the Guildhall 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 Guildhall, United States (44.50°N, 71.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Guildhall, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Guildhall, 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 Guildhall, 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.