Home / Foster / 12 December 2021
Foster
United States · 12 December 2021
← 11 December 202113 December 2021 →
Average
6.7°C
low 2.1°C · high 17°C
Rainfall
2mm
rain recorded
Wind
5.2m/s
daily average
Humidity
45.6%
daily average
Cloud
41%
cover
Pressure
1015hPa
daily average
The temperature ranged from 2.1°C around 20:00 to 17°C around 00:00. Rain was recorded across 3 hours, from around 00:00 to 02:00 (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
100th percentile
Low temperature
87th percentile
Rainfall
70th percentile
Wind
87th 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 1.1°C, versus 6.7°C on this specific day.
Sun & daylight
Sunrise
07:05
Sunset
16:16
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 | 17°C | 13.3°C | 1.67 | 7.5 | WSW | 88 | 1000 |
| 01:00 | 06:00 | 13.9°C | 9.5°C | 0.21 | 6.9 | W | 85 | 1002 |
| 02:00 | 07:00 | 11.1°C | 5°C | 0.12 | 7.1 | WNW | 67 | 1004 |
| 03:00 | 08:00 | 9°C | 2.1°C | 0.05 | 6.9 | WNW | 51 | 1006 |
| 04:00 | 09:00 | 8.4°C | 1.2°C | 0 | 6.9 | WNW | 42 | 1008 |
| 05:00 | 10:00 | 6.6°C | -0.8°C | 0 | 6.8 | WNW | 41 | 1010 |
| 06:00 | 11:00 | 6.4°C | -0.8°C | 0 | 6.3 | WNW | 40 | 1011 |
| 07:00 | 12:00 | 5.8°C | -0.9°C | 0 | 5.7 | WNW | 41 | 1012 |
| 08:00 | 13:00 | 5.5°C | -0.8°C | 0 | 5 | WNW | 43 | 1014 |
| 09:00 | 14:00 | 5.5°C | -0.6°C | 0 | 4.8 | WNW | 43 | 1016 |
| 10:00 | 15:00 | 6.1°C | -0.3°C | 0 | 5.3 | WNW | 43 | 1017 |
| 11:00 | 16:00 | 6.9°C | 0.3°C | 0 | 5.5 | WNW | 39 | 1017 |
| 12:00 | 17:00 | 7.6°C | 0.8°C | 0 | 5.6 | WNW | 34 | 1017 |
| 13:00 | 18:00 | 7.8°C | 1.3°C | 0 | 5 | WNW | 30 | 1018 |
| 14:00 | 19:00 | 7.8°C | 1.6°C | 0 | 4.6 | WNW | 31 | 1018 |
| 15:00 | 20:00 | 7.5°C | 1.7°C | 0 | 4 | W | 30 | 1019 |
| 16:00 | 21:00 | 6.8°C | 1.4°C | 0 | 3.4 | W | 31 | 1019 |
| 17:00 | 22:00 | 4.6°C | -0.6°C | 0 | 3.2 | WSW | 39 | 1020 |
| 18:00 | 23:00 | 3.4°C | -1.7°C | 0 | 3.2 | WSW | 43 | 1021 |
| 19:00 | 00:00 | 2.7°C | -2.6°C | 0 | 3.4 | WSW | 45 | 1021 |
| 20:00 | 01:00 | 2.1°C | -3.4°C | 0 | 3.7 | WSW | 46 | 1022 |
| 21:00 | 02:00 | 2.2°C | -3.5°C | 0 | 4 | WSW | 46 | 1022 |
| 22:00 | 03:00 | 2.9°C | -3°C | 0 | 4.4 | WSW | 47 | 1022 |
| 23:00 | 04:00 | 3.3°C | -2.6°C | 0 | 4.5 | WSW | 49 | 1022 |
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
- Foster — 41.750°, -71.750°, ERA5 grid cell center, 11.6 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 12 December 2021 specifically — not a monthly average. See the Foster 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 Foster, United States (41.75°N, 71.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Foster, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Foster, 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 Foster, 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.