Home / Keizer / 18 December 2018
Keizer
United States · 18 December 2018
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Average
11.9°C
low 9.9°C · high 14.3°C
Rainfall
33.4mm
rain recorded
Wind
5.8m/s
daily average
Humidity
85.2%
daily average
Cloud
69%
cover
Pressure
1013hPa
daily average
The temperature ranged from 9.9°C around 00:00 to 14.3°C around 13:00. Rain was recorded across 23 hours, from around 00:00 to 23:00 (33.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
93th percentile
Low temperature
96th percentile
Rainfall
97th percentile
Wind
99th 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 5.8°C, versus 11.9°C on this specific day.
Sun & daylight
Sunrise
07:45
Sunset
16:31
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 | 9.9°C | 3.3°C | 2.77 | 8.6 | S | 85 | 1009 |
| 01:00 | 09:00 | 10.5°C | 4°C | 2.28 | 8.9 | S | 86 | 1008 |
| 02:00 | 10:00 | 11.3°C | 5.4°C | 2.75 | 8.2 | SSW | 86 | 1007 |
| 03:00 | 11:00 | 11.7°C | 5.6°C | 3.33 | 8.7 | S | 87 | 1007 |
| 04:00 | 12:00 | 12.2°C | 6.3°C | 2.91 | 8.5 | S | 87 | 1005 |
| 05:00 | 13:00 | 12.4°C | 6.9°C | 3.84 | 8 | SSW | 87 | 1005 |
| 06:00 | 14:00 | 12.4°C | 7.9°C | 3.95 | 6.6 | SSW | 88 | 1005 |
| 07:00 | 15:00 | 12.6°C | 9.3°C | 4.22 | 5.1 | SW | 90 | 1007 |
| 08:00 | 16:00 | 12.6°C | 9.9°C | 2.07 | 4.2 | SW | 87 | 1008 |
| 09:00 | 17:00 | 12.1°C | 9°C | 1.8 | 4.5 | SW | 88 | 1010 |
| 10:00 | 18:00 | 12°C | 8.7°C | 0.59 | 4.8 | SW | 87 | 1011 |
| 11:00 | 19:00 | 12.7°C | 9.4°C | 0.19 | 5.1 | SW | 87 | 1013 |
| 12:00 | 20:00 | 13.3°C | 9.8°C | 0.1 | 5.5 | SW | 87 | 1013 |
| 13:00 | 21:00 | 14.3°C | 11°C | 0.12 | 5.5 | SW | 86 | 1013 |
| 14:00 | 22:00 | 13.7°C | 9.7°C | 0.28 | 5.5 | SW | 74 | 1014 |
| 15:00 | 23:00 | 13.1°C | 9.1°C | 0.41 | 5.5 | SW | 77 | 1016 |
| 16:00 | 00:00 | 12.4°C | 8.3°C | 0.12 | 5.5 | SW | 79 | 1016 |
| 17:00 | 01:00 | 12°C | 8.3°C | 0.05 | 4.7 | SW | 80 | 1017 |
| 18:00 | 02:00 | 11.2°C | 7.6°C | 0.22 | 4.5 | SSW | 81 | 1018 |
| 19:00 | 03:00 | 10.2°C | 6.8°C | 0.41 | 4.1 | SSW | 84 | 1018 |
| 20:00 | 04:00 | 10.2°C | 6.9°C | 0.42 | 4.2 | SSW | 89 | 1020 |
| 21:00 | 05:00 | 10.9°C | 7.8°C | 0.12 | 4.1 | SSW | 88 | 1021 |
| 22:00 | 06:00 | 11.4°C | 8.3°C | 0.12 | 4.1 | SSW | 86 | 1022 |
| 23:00 | 07:00 | 10.2°C | 7°C | 0.33 | 4.1 | SSW | 88 | 1023 |
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 18 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.