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Spanaway

United States · 20 December 2017

SpanawayUnited States5:31 AM localChange location

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Average

3°C

low 0.3° · high 5.3°

Rainfall

2.9mm

rain recorded

Wind

1.8m/s

daily average

Humidity

79.6%

daily average

Cloud

36%

cover

Pressure

1021hPa

daily average

The temperature ranged from 0.3°C around 23:00 to 5.3°C around 13:00. Rain was recorded across 6 hours, from around 00:00 to 05:00 (2.9mm total).

How unusual was this day?

Compared against the same 135 calendar days (±7 days) across the other 9 years on file.

High temperature

25th percentile

Low temperature

17th percentile

Rainfall

40th percentile

Wind

20th 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°C, versus 3°C on this specific day.

Sun & daylight

Sunrise

07:52

Sunset

16:23

Day length

8h 31m

Hour by hour

Temperature (line) and hourly rainfall (bars), local time — America/Los_Angeles.

↓ Download CSV
00:0006:0012:0018:0023:00

Cumulative rainfall through the day.

00:0006:0012:0018:0023:00
Local timeUTCTemp °CFeels °CRain mmWind m/sDirHumidity %Pressure hPa
00:0008:003.5-0.70.513.8SSW941008
01:0009:002.7-1.10.263.1SSW971009
02:0010:002.2-1.10.312.2SW961010
03:0011:002.1-0.50.641.2SW971011
04:0012:002.50.50.490.4NNW931013
05:0013:002.7-0.20.551.7N941014
06:0014:002.8-0.60.092.3NNE931016
07:0015:002.6-0.90.052.6NNE931018
08:0016:003-0.40.022.3NE901019
09:0017:003.20.10.011.8NE891020
10:0018:003.81.101.2NNE831022
11:0019:004.31.501.2NNE761023
12:0020:004.71.401.7N681023
13:0021:005.31.502.2N611024
14:0022:0050.503.2NNE571025
15:0023:005.20.902.7NNE551026
16:0000:004.30.801.8NNE631027
17:0001:003.80.601.2NNE631028
18:0002:003-0.401.5NE661029
19:0003:001.3-2.201.7E741029
20:0004:001.5-1.801.4ESE741030
21:0005:000.5-2.701.2SE771030
22:0006:000.6-200.3SSW771031
23:0007:000.3-2.400.4SW801031

Same date, other years

202520242023202220212020201920182016

Nearby cities

Elk Plain

0km away, same day

Joint Base Lewis McChord

0km away, same day

Yelm

0km away, same day

North Yelm

0km away, same day

North Fort Lewis

0km away, same day

Lacey

19km away, same day

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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 20 December 2017 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

Plain text
PastClimate (2026-07-17). 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/
APA
PastClimate. (2026). Historical climate data for Spanaway, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
MLA
"Historical Climate Data for Spanaway, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 2026, www.pastclimate.com.
BibTeX
@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 2026-07-17},
  url = {https://www.pastclimate.com/}
}

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