Home / Johnston / 9 December 2017
Johnston
United States · 9 December 2017
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Average
0.2°C
low -0.6°C · high 1.4°C
Rainfall
15mm
rain recorded
Wind
2.5m/s
daily average
Humidity
83.4%
daily average
Cloud
100%
cover
Pressure
1011hPa
daily average
The temperature ranged from -0.6°C around 17:00 to 1.4°C around 00:00. Rain was recorded across 18 hours, from around 06:00 to 23:00 (15mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
16th percentile
Low temperature
60th percentile
Rainfall
93th percentile
Wind
17th 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 2.3°C, versus 0.2°C on this specific day.
Sun & daylight
Sunrise
07:01
Sunset
16:15
Day length
9h 14m
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 | -1.6°C | 0 | 0.6 | NW | 66 | 1015 |
| 01:00 | 06:00 | 1.2°C | -1.6°C | 0.02 | 0.4 | NNW | 69 | 1014 |
| 02:00 | 07:00 | 1.3°C | -1.6°C | 0 | 0.6 | WSW | 69 | 1015 |
| 03:00 | 08:00 | 1.1°C | -1.6°C | 0.02 | 0.4 | SSE | 70 | 1015 |
| 04:00 | 09:00 | 0.9°C | -1.8°C | 0.04 | 0.4 | WNW | 74 | 1015 |
| 05:00 | 10:00 | 1.1°C | -1.9°C | 0.08 | 0.8 | N | 73 | 1015 |
| 06:00 | 11:00 | 1°C | -2.1°C | 0.13 | 0.8 | NNE | 70 | 1014 |
| 07:00 | 12:00 | 0.8°C | -2.6°C | 0.11 | 1.3 | N | 69 | 1015 |
| 08:00 | 13:00 | 0.9°C | -2.8°C | 0.18 | 1.6 | N | 68 | 1015 |
| 09:00 | 14:00 | 0.8°C | -3.1°C | 0.29 | 2 | NNE | 72 | 1015 |
| 10:00 | 15:00 | 0.6°C | -3.4°C | 0.55 | 2.4 | NE | 81 | 1013 |
| 11:00 | 16:00 | 0°C | -3.4°C | 0.96 | 1.8 | N | 88 | 1014 |
| 12:00 | 17:00 | -0.5°C | -4.5°C | 1.24 | 2.6 | NNE | 93 | 1012 |
| 13:00 | 18:00 | -0.5°C | -4.9°C | 0.94 | 3.2 | NNE | 93 | 1011 |
| 14:00 | 19:00 | -0.5°C | -5.3°C | 1.2 | 3.7 | NNE | 94 | 1010 |
| 15:00 | 20:00 | -0.5°C | -5.5°C | 1.23 | 4 | NNE | 94 | 1009 |
| 16:00 | 21:00 | -0.5°C | -5.7°C | 1.11 | 4.3 | NNE | 94 | 1008 |
| 17:00 | 22:00 | -0.6°C | -6°C | 1.34 | 4.5 | N | 96 | 1007 |
| 18:00 | 23:00 | -0.6°C | -5.8°C | 1.37 | 4.3 | N | 96 | 1006 |
| 19:00 | 00:00 | -0.5°C | -5.5°C | 1.27 | 4.1 | N | 96 | 1005 |
| 20:00 | 01:00 | -0.3°C | -5.6°C | 0.98 | 4.4 | N | 94 | 1004 |
| 21:00 | 02:00 | -0.4°C | -5.4°C | 0.77 | 4.1 | N | 95 | 1004 |
| 22:00 | 03:00 | -0.2°C | -5.1°C | 0.64 | 3.9 | NNW | 94 | 1004 |
| 23:00 | 04:00 | -0.1°C | -4.9°C | 0.49 | 3.8 | NNW | 94 | 1004 |
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
- Johnston — 41.750°, -71.500°, ERA5 grid cell center, 8.0 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 9 December 2017 specifically — not a monthly average. See the Johnston 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 Johnston, United States (41.75°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 Johnston, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Johnston, 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 Johnston, 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.