Home / Keizer / 20 December 2017
Keizer
United States · 20 December 2017
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Average
4.4°C
low -0.3°C · high 8.3°C
Rainfall
3.8mm
rain recorded
Wind
2.5m/s
daily average
Humidity
89.7%
daily average
Cloud
44%
cover
Pressure
1022hPa
daily average
The temperature ranged from -0.3°C around 23:00 to 8.3°C around 15:00. Rain was recorded across 11 hours, from around 02:00 to 14:00 (3.8mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
39th percentile
Low temperature
16th percentile
Rainfall
55th percentile
Wind
53th 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 6.2°C, versus 4.4°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 | 5.3°C | 0.8°C | 0.08 | 4.5 | SSW | 93 | 1013 |
| 01:00 | 09:00 | 4°C | -0.6°C | 0.07 | 4.6 | SSW | 97 | 1013 |
| 02:00 | 10:00 | 3.7°C | -1°C | 0.46 | 4.4 | SSW | 93 | 1014 |
| 03:00 | 11:00 | 3.8°C | -0.9°C | 0.47 | 4.5 | SW | 96 | 1015 |
| 04:00 | 12:00 | 3.7°C | -0.9°C | 0.54 | 4.5 | SSW | 97 | 1016 |
| 05:00 | 13:00 | 3.7°C | -0.9°C | 0.56 | 4.5 | S | 95 | 1016 |
| 06:00 | 14:00 | 4°C | -0.3°C | 0.45 | 4.1 | S | 95 | 1017 |
| 07:00 | 15:00 | 4.6°C | 0.8°C | 0.11 | 3.5 | S | 95 | 1018 |
| 08:00 | 16:00 | 4.3°C | 0.6°C | 0.23 | 3.2 | SSW | 93 | 1019 |
| 09:00 | 17:00 | 4.2°C | 0.9°C | 0.23 | 2.6 | S | 93 | 1020 |
| 10:00 | 18:00 | 5.2°C | 2.3°C | 0.02 | 2.2 | SSW | 91 | 1021 |
| 11:00 | 19:00 | 6.5°C | 4.4°C | 0.02 | 1.4 | SSW | 91 | 1022 |
| 12:00 | 20:00 | 7.1°C | 5.7°C | 0.1 | 0.6 | WSW | 89 | 1023 |
| 13:00 | 21:00 | 8.1°C | 6.6°C | 0.14 | 0.6 | NNW | 82 | 1023 |
| 14:00 | 22:00 | 8.2°C | 6.7°C | 0.23 | 0.2 | NE | 76 | 1024 |
| 15:00 | 23:00 | 8.3°C | 6.4°C | 0.07 | 0.8 | N | 73 | 1025 |
| 16:00 | 00:00 | 7.3°C | 5°C | 0.02 | 1.2 | NNE | 74 | 1026 |
| 17:00 | 01:00 | 4.8°C | 1.6°C | 0 | 2.1 | NE | 83 | 1027 |
| 18:00 | 02:00 | 4.7°C | 1.5°C | 0 | 2.1 | NE | 81 | 1028 |
| 19:00 | 03:00 | 2.6°C | -0.6°C | 0 | 1.9 | NNE | 88 | 1029 |
| 20:00 | 04:00 | 1.3°C | -2°C | 0 | 1.9 | NE | 92 | 1030 |
| 21:00 | 05:00 | 0.6°C | -2.8°C | 0 | 1.9 | ENE | 94 | 1030 |
| 22:00 | 06:00 | 0.2°C | -3.3°C | 0 | 2.1 | E | 95 | 1030 |
| 23:00 | 07:00 | -0.3°C | -2.9°C | 0 | 0.7 | NE | 96 | 1030 |
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 2017 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 (2026-07-19). 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 19, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Keizer, 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 Keizer, 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.