Home / Chelan / 12 December 2017
Chelan
United States · 12 December 2017
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Average
-4.1°C
low -5°C · high -1.6°C
Rainfall
0mm
dry day
Wind
0.9m/s
daily average
Humidity
88.8%
daily average
Cloud
98%
cover
Pressure
1039hPa
daily average
The temperature ranged from -5°C around 13:00 to -1.6°C around 00:00. 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
21th percentile
Low temperature
27th percentile
Rainfall
18th percentile
Wind
19th 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 -1.3°C, versus -4.1°C on this specific day.
Sun & daylight
Sunrise
07:39
Sunset
16:07
Day length
8h 28m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Los_Angeles.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 08:00 | -1.6°C | -4.2°C | 0 | 0.3 | NNE | 94 | 1039 |
| 01:00 | 09:00 | -2.9°C | -5.4°C | 0 | 0.2 | NW | 98 | 1039 |
| 02:00 | 10:00 | -4.6°C | -8.2°C | 0 | 1.3 | NE | 97 | 1040 |
| 03:00 | 11:00 | -4.3°C | -8°C | 0 | 1.5 | E | 95 | 1041 |
| 04:00 | 12:00 | -4.4°C | -8°C | 0 | 1.4 | E | 95 | 1041 |
| 05:00 | 13:00 | -4.3°C | -7.8°C | 0 | 1.1 | ENE | 93 | 1041 |
| 06:00 | 14:00 | -4.7°C | -7.9°C | 0 | 0.8 | E | 94 | 1041 |
| 07:00 | 15:00 | -4.2°C | -7.2°C | 0 | 0.5 | ESE | 93 | 1040 |
| 08:00 | 16:00 | -4.4°C | -7.5°C | 0 | 0.5 | E | 91 | 1040 |
| 09:00 | 17:00 | -4.1°C | -7.3°C | 0 | 0.8 | ENE | 93 | 1040 |
| 10:00 | 18:00 | -4.5°C | -7.9°C | 0 | 1.1 | E | 93 | 1040 |
| 11:00 | 19:00 | -4.7°C | -8.3°C | 0 | 1.1 | SE | 87 | 1039 |
| 12:00 | 20:00 | -4.8°C | -8.5°C | 0 | 1.4 | SE | 85 | 1038 |
| 13:00 | 21:00 | -5°C | -8.9°C | 0 | 1.5 | SE | 82 | 1037 |
| 14:00 | 22:00 | -4.8°C | -8.6°C | 0 | 1.4 | ENE | 82 | 1038 |
| 15:00 | 23:00 | -4.5°C | -8.9°C | 0 | 2.1 | ENE | 79 | 1038 |
| 16:00 | 00:00 | -4.8°C | -8.6°C | 0 | 1.5 | E | 82 | 1038 |
| 17:00 | 01:00 | -4.4°C | -7.9°C | 0 | 0.9 | E | 82 | 1038 |
| 18:00 | 02:00 | -4.4°C | -7.7°C | 0 | 0.7 | ESE | 85 | 1038 |
| 19:00 | 03:00 | -4°C | -7°C | 0 | 0.4 | E | 85 | 1038 |
| 20:00 | 04:00 | -4°C | -7.1°C | 0 | 0.6 | ENE | 87 | 1038 |
| 21:00 | 05:00 | -3.3°C | -6.3°C | 0 | 0.6 | NE | 86 | 1037 |
| 22:00 | 06:00 | -3°C | -5.8°C | 0 | 0.3 | NE | 86 | 1037 |
| 23:00 | 07:00 | -3.2°C | -6°C | 0 | 0.3 | NNW | 88 | 1036 |
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
- Chelan — 47.750°, -120.000°, ERA5 grid cell center, 10.2 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 12 December 2017 specifically — not a monthly average. See the Chelan 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 (2026-07-18). Historical climate data for Chelan, United States (47.75°N, 120.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Chelan, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Chelan, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Chelan, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.