Home / Chelan / 9 December 2018
Chelan
United States · 9 December 2018
← 8 December 201810 December 2018 →
Average
-1.3°C
low -3.3°C · high -0.2°C
Rainfall
3.1mm
rain recorded
Wind
0.9m/s
daily average
Humidity
81.4%
daily average
Cloud
100%
cover
Pressure
1030hPa
daily average
The temperature ranged from -3.3°C around 01:00 to -0.2°C around 19:00. Rain was recorded across 9 hours, from around 15:00 to 23:00 (3.1mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
35th percentile
Low temperature
45th percentile
Rainfall
76th percentile
Wind
27th 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 -1.2°C, versus -1.3°C on this specific day.
Sun & daylight
Sunrise
07:36
Sunset
16:07
Day length
8h 31m
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 | -3.1°C | -6.5°C | 0.01 | 1 | NNE | 83 | 1036 |
| 01:00 | 09:00 | -3.3°C | -6.8°C | 0 | 1.2 | NNE | 84 | 1035 |
| 02:00 | 10:00 | -3°C | -6.8°C | 0 | 1.4 | NE | 78 | 1034 |
| 03:00 | 11:00 | -2.3°C | -5.9°C | 0 | 1.3 | ENE | 76 | 1034 |
| 04:00 | 12:00 | -1.8°C | -5.1°C | 0 | 0.9 | ENE | 76 | 1034 |
| 05:00 | 13:00 | -1.7°C | -5.1°C | 0 | 1 | NE | 76 | 1033 |
| 06:00 | 14:00 | -1.5°C | -4.9°C | 0 | 1 | NE | 77 | 1033 |
| 07:00 | 15:00 | -1.7°C | -5°C | 0 | 1 | NNE | 77 | 1032 |
| 08:00 | 16:00 | -1.3°C | -4.7°C | 0 | 1.1 | NNE | 77 | 1032 |
| 09:00 | 17:00 | -1.1°C | -4.7°C | 0 | 1.3 | NNE | 74 | 1032 |
| 10:00 | 18:00 | -1.3°C | -4.8°C | 0 | 1.3 | NE | 71 | 1031 |
| 11:00 | 19:00 | -1.2°C | -4.6°C | 0.03 | 1.1 | NE | 74 | 1031 |
| 12:00 | 20:00 | -1°C | -4.4°C | 0.03 | 1.1 | NE | 75 | 1029 |
| 13:00 | 21:00 | -0.5°C | -3.8°C | 0.03 | 1.1 | ENE | 74 | 1029 |
| 14:00 | 22:00 | -1.7°C | -5.2°C | 0.06 | 1.4 | NE | 82 | 1029 |
| 15:00 | 23:00 | -1.1°C | -4.5°C | 0.13 | 1.3 | NE | 80 | 1028 |
| 16:00 | 00:00 | -0.3°C | -3.3°C | 0.24 | 0.8 | E | 83 | 1028 |
| 17:00 | 01:00 | -0.6°C | -3.5°C | 0.29 | 0.8 | ENE | 86 | 1027 |
| 18:00 | 02:00 | -0.5°C | -3.4°C | 0.44 | 0.9 | NE | 88 | 1026 |
| 19:00 | 03:00 | -0.2°C | -2.6°C | 0.57 | 0.2 | ENE | 90 | 1026 |
| 20:00 | 04:00 | -0.3°C | -2.6°C | 0.55 | 0.1 | NNE | 91 | 1026 |
| 21:00 | 05:00 | -0.4°C | -2.8°C | 0.38 | 0.3 | NW | 93 | 1025 |
| 22:00 | 06:00 | -0.4°C | -2.8°C | 0.23 | 0.3 | WNW | 95 | 1025 |
| 23:00 | 07:00 | -0.5°C | -2.9°C | 0.12 | 0.4 | SW | 96 | 1025 |
Nearby cities
Need this verified for an official or legal purpose? Request a weather verification report.
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 9 December 2018 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 (2026-07-19). 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 19, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Chelan, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 19, 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 2026-07-19},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.