Home / Foster / 4 December 2021
Foster
United States · 4 December 2021
← 3 December 20215 December 2021 →
Average
0.7°C
low -3.5°C · high 5°C
Rainfall
0mm
dry day
Wind
2.6m/s
daily average
Humidity
61.7%
daily average
Cloud
39%
cover
Pressure
1019hPa
daily average
The temperature ranged from -3.5°C around 05:00 to 5°C around 14:00. 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
39th percentile
Low temperature
27th percentile
Rainfall
51th percentile
Wind
30th 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 2.9°C, versus 0.7°C on this specific day.
Sun & daylight
Sunrise
06:57
Sunset
16:16
Day length
9h 18m
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 | -1.4°C | -6.6°C | 0 | 3 | W | 49 | 1018 |
| 01:00 | 06:00 | -1.8°C | -6.9°C | 0 | 2.7 | W | 49 | 1018 |
| 02:00 | 07:00 | -1.9°C | -6.7°C | 0 | 2.4 | W | 51 | 1019 |
| 03:00 | 08:00 | -2.3°C | -7.1°C | 0 | 2.3 | WSW | 54 | 1019 |
| 04:00 | 09:00 | -2.3°C | -7.1°C | 0 | 2.4 | WSW | 55 | 1019 |
| 05:00 | 10:00 | -3.5°C | -8.1°C | 0 | 2.3 | WSW | 65 | 1019 |
| 06:00 | 11:00 | -3.4°C | -7.9°C | 0 | 2.2 | WSW | 65 | 1019 |
| 07:00 | 12:00 | -3.1°C | -7.5°C | 0 | 2.1 | WSW | 66 | 1020 |
| 08:00 | 13:00 | -1.8°C | -6.1°C | 0 | 2.1 | WSW | 63 | 1020 |
| 09:00 | 14:00 | 0.1°C | -4.1°C | 0 | 2 | WSW | 60 | 1021 |
| 10:00 | 15:00 | 2.5°C | -1.7°C | 0 | 2.1 | WSW | 53 | 1021 |
| 11:00 | 16:00 | 3.8°C | -0.5°C | 0 | 2.3 | WSW | 50 | 1020 |
| 12:00 | 17:00 | 4.3°C | -0.1°C | 0 | 2.4 | WSW | 49 | 1020 |
| 13:00 | 18:00 | 4.4°C | 0.1°C | 0 | 2.5 | SW | 50 | 1019 |
| 14:00 | 19:00 | 5°C | 0.6°C | 0 | 2.7 | SW | 50 | 1018 |
| 15:00 | 20:00 | 4.8°C | 0.6°C | 0 | 2.5 | SSW | 53 | 1018 |
| 16:00 | 21:00 | 3.7°C | -0.4°C | 0 | 2.3 | SSW | 60 | 1018 |
| 17:00 | 22:00 | 2.3°C | -1.4°C | 0 | 1.9 | SSW | 66 | 1019 |
| 18:00 | 23:00 | 1.2°C | -3.2°C | 0 | 2.8 | SSW | 71 | 1019 |
| 19:00 | 00:00 | 0.9°C | -3.8°C | 0 | 3.2 | SW | 73 | 1019 |
| 20:00 | 01:00 | 0.9°C | -3.9°C | 0 | 3.5 | SW | 77 | 1019 |
| 21:00 | 02:00 | 1.4°C | -3.4°C | 0 | 3.7 | SW | 81 | 1020 |
| 22:00 | 03:00 | 2°C | -2.8°C | 0 | 3.9 | SW | 84 | 1020 |
| 23:00 | 04:00 | 1.7°C | -2.7°C | 0 | 3.4 | W | 87 | 1021 |
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 4 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.