Home / Spanaway / 18 December 2020
Spanaway
United States · 18 December 2020
← 17 December 202019 December 2020 →
Average
7.4°C
low 6°C · high 9.2°C
Rainfall
9mm
rain recorded
Wind
5m/s
daily average
Humidity
84.5%
daily average
Cloud
100%
cover
Pressure
1019hPa
daily average
The temperature ranged from 6°C around 02:00 to 9.2°C around 16:00. Rain was recorded across 15 hours, from around 00:00 to 23:00 (9mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
75th percentile
Low temperature
82th percentile
Rainfall
68th percentile
Wind
90th 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 4.9°C, versus 7.4°C on this specific day.
Sun & daylight
Sunrise
07:51
Sunset
16:22
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 | 6.1°C | 2.4°C | 0.13 | 3.4 | SSW | 88 | 1024 |
| 01:00 | 09:00 | 6.6°C | 3.2°C | 0.08 | 3.3 | SSW | 89 | 1024 |
| 02:00 | 10:00 | 6°C | 2.5°C | 0.08 | 3.2 | S | 90 | 1024 |
| 03:00 | 11:00 | 6.1°C | 2.4°C | 0.05 | 3.5 | S | 89 | 1023 |
| 04:00 | 12:00 | 6.3°C | 2.4°C | 0.11 | 3.7 | S | 88 | 1023 |
| 05:00 | 13:00 | 6.3°C | 2.5°C | 0.41 | 3.6 | S | 87 | 1023 |
| 06:00 | 14:00 | 6.2°C | 2.5°C | 0.41 | 3.5 | S | 89 | 1023 |
| 07:00 | 15:00 | 6.5°C | 2.6°C | 0.25 | 3.8 | S | 88 | 1022 |
| 08:00 | 16:00 | 6.4°C | 2.4°C | 0.19 | 4 | S | 88 | 1022 |
| 09:00 | 17:00 | 6.6°C | 2.2°C | 0.12 | 4.6 | S | 87 | 1022 |
| 10:00 | 18:00 | 6.7°C | 2°C | 0.04 | 5 | S | 87 | 1022 |
| 11:00 | 19:00 | 7.1°C | 2.3°C | 0.1 | 5.2 | S | 85 | 1022 |
| 12:00 | 20:00 | 7.7°C | 2.8°C | 0.02 | 5.3 | S | 82 | 1021 |
| 13:00 | 21:00 | 8.3°C | 3.2°C | 0.03 | 5.6 | S | 78 | 1019 |
| 14:00 | 22:00 | 8.9°C | 3.7°C | 0.04 | 5.7 | S | 74 | 1018 |
| 15:00 | 23:00 | 9.1°C | 3.6°C | 0.03 | 6 | S | 72 | 1016 |
| 16:00 | 00:00 | 9.2°C | 3.6°C | 0.03 | 6.2 | S | 71 | 1016 |
| 17:00 | 01:00 | 9.1°C | 3.3°C | 0.5 | 6.6 | S | 73 | 1014 |
| 18:00 | 02:00 | 8.3°C | 2.5°C | 1.45 | 6.9 | S | 84 | 1014 |
| 19:00 | 03:00 | 7.9°C | 2.1°C | 2.5 | 6.9 | S | 89 | 1014 |
| 20:00 | 04:00 | 7.5°C | 1.7°C | 1.29 | 7 | S | 89 | 1014 |
| 21:00 | 05:00 | 8°C | 2.4°C | 0.22 | 6.7 | S | 86 | 1014 |
| 22:00 | 06:00 | 8.1°C | 3.3°C | 0.35 | 5.6 | S | 87 | 1015 |
| 23:00 | 07:00 | 8.8°C | 4.7°C | 0.58 | 4.7 | SSW | 87 | 1016 |
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
- Spanaway — 47.000°, -122.500°, ERA5 grid cell center, 12.6 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 18 December 2020 specifically — not a monthly average. See the Spanaway 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 Spanaway, United States (47.00°N, 122.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Spanaway, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Spanaway, 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 Spanaway, 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.