Home / Keizer / 20 December 2018
Keizer
United States · 20 December 2018
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Average
10.1°C
low 6.4°C · high 13.1°C
Rainfall
9.8mm
rain recorded
Wind
4.1m/s
daily average
Humidity
83.1%
daily average
Cloud
85%
cover
Pressure
1014hPa
daily average
The temperature ranged from 6.4°C around 23:00 to 13.1°C around 07:00. Rain was recorded across 14 hours, from around 07:00 to 20:00 (9.8mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
91th percentile
Low temperature
80th percentile
Rainfall
75th percentile
Wind
81th 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 5.7°C, versus 10.1°C on this specific day.
Sun & daylight
Sunrise
07:46
Sunset
16:32
Day length
8h 46m
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 | 9.3°C | 7.2°C | 0 | 2.3 | SSE | 91 | 1014 |
| 01:00 | 09:00 | 8.7°C | 6.5°C | 0 | 2.4 | SSE | 95 | 1013 |
| 02:00 | 10:00 | 9.7°C | 6.8°C | 0 | 3.1 | SSE | 84 | 1013 |
| 03:00 | 11:00 | 10°C | 6.9°C | 0 | 3.5 | SSE | 81 | 1012 |
| 04:00 | 12:00 | 10.8°C | 7.6°C | 0 | 3.6 | S | 77 | 1011 |
| 05:00 | 13:00 | 11.2°C | 7.6°C | 0 | 4.1 | S | 74 | 1010 |
| 06:00 | 14:00 | 11.9°C | 7.5°C | 0 | 5.2 | S | 71 | 1009 |
| 07:00 | 15:00 | 13.1°C | 7.9°C | 1 | 6.7 | S | 70 | 1008 |
| 08:00 | 16:00 | 12.8°C | 7.4°C | 0.71 | 7.6 | SSW | 80 | 1008 |
| 09:00 | 17:00 | 12.4°C | 7.2°C | 0.94 | 7.4 | SSW | 85 | 1009 |
| 10:00 | 18:00 | 12.2°C | 7.4°C | 2.25 | 7.1 | SSW | 89 | 1010 |
| 11:00 | 19:00 | 11.7°C | 7°C | 2.52 | 6.8 | SW | 90 | 1012 |
| 12:00 | 20:00 | 11.7°C | 7.8°C | 0.79 | 5.4 | SW | 87 | 1014 |
| 13:00 | 21:00 | 11.4°C | 7.9°C | 0.24 | 4.5 | SW | 82 | 1014 |
| 14:00 | 22:00 | 11°C | 8.2°C | 0.16 | 3.3 | SSW | 81 | 1015 |
| 15:00 | 23:00 | 10.4°C | 7.4°C | 0.27 | 3.5 | SW | 81 | 1015 |
| 16:00 | 00:00 | 10.2°C | 7.2°C | 0.13 | 3.5 | SW | 82 | 1016 |
| 17:00 | 01:00 | 9.2°C | 6.2°C | 0.14 | 3.1 | SW | 84 | 1017 |
| 18:00 | 02:00 | 8.6°C | 5.5°C | 0.14 | 3.1 | SW | 83 | 1017 |
| 19:00 | 03:00 | 8°C | 5°C | 0.17 | 2.9 | SW | 84 | 1018 |
| 20:00 | 04:00 | 7.4°C | 4.3°C | 0.27 | 2.8 | SW | 84 | 1019 |
| 21:00 | 05:00 | 6.9°C | 3.7°C | 0.04 | 2.8 | SW | 86 | 1020 |
| 22:00 | 06:00 | 6.6°C | 3.5°C | 0.01 | 2.7 | SSW | 87 | 1020 |
| 23:00 | 07:00 | 6.4°C | 3.7°C | 0 | 2 | S | 88 | 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
- Keizer — 45.000°, -123.000°, ERA5 grid cell center, 2.3 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 20 December 2018 specifically — not a monthly average. See the Keizer 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 Keizer, United States (45.00°N, 123.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Keizer, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Keizer, 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 Keizer, 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.