Home / Washington / 30 August 2020
Washington
United States · 30 August 2020
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Average
21.7°C
low 15.9° · high 27°
Rainfall
1.1mm
rain recorded
Wind
1.9m/s
daily average
Humidity
74.8%
daily average
Cloud
58%
cover
Pressure
1010hPa
daily average
The temperature ranged from 15.9°C around 07:00 to 27°C around 16:00. Rain was recorded across 4 hours, from around 17:00 to 23:00 (1.1mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
32th percentile
Low temperature
28th percentile
Rainfall
69th percentile
Wind
32th 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 23.5°C, versus 21.7°C on this specific day.
Sun & daylight
Sunrise
06:32
Sunset
19:36
Day length
13h 4m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Chicago.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 19.8 | 21.4 | 0 | 2 | NE | 92 | 1012 |
| 01:00 | 06:00 | 19.9 | 21.2 | 0 | 2.3 | NE | 90 | 1012 |
| 02:00 | 07:00 | 19.3 | 19.9 | 0 | 2.5 | NE | 86 | 1012 |
| 03:00 | 08:00 | 18.4 | 18.5 | 0 | 2.4 | NE | 82 | 1012 |
| 04:00 | 09:00 | 17.8 | 17.6 | 0 | 2.2 | NE | 79 | 1012 |
| 05:00 | 10:00 | 16.1 | 16.2 | 0 | 1.9 | ENE | 90 | 1013 |
| 06:00 | 11:00 | 16.3 | 16.2 | 0 | 2 | ENE | 88 | 1012 |
| 07:00 | 12:00 | 15.9 | 15.6 | 0 | 2.1 | E | 87 | 1012 |
| 08:00 | 13:00 | 17 | 16.9 | 0 | 2.1 | E | 85 | 1012 |
| 09:00 | 14:00 | 19 | 19 | 0 | 1.8 | E | 73 | 1012 |
| 10:00 | 15:00 | 22.1 | 21.6 | 0 | 1.9 | E | 55 | 1012 |
| 11:00 | 16:00 | 23.9 | 23.9 | 0 | 1.7 | ESE | 53 | 1012 |
| 12:00 | 17:00 | 25.2 | 25.5 | 0 | 1.4 | E | 49 | 1011 |
| 13:00 | 18:00 | 25.8 | 26.3 | 0 | 1.3 | E | 50 | 1010 |
| 14:00 | 19:00 | 26.4 | 27.1 | 0 | 1.6 | E | 52 | 1009 |
| 15:00 | 20:00 | 26.7 | 27.2 | 0 | 2.1 | ESE | 52 | 1009 |
| 16:00 | 21:00 | 27 | 27.1 | 0 | 2.3 | ESE | 49 | 1008 |
| 17:00 | 22:00 | 25.4 | 27.5 | 0.57 | 2.1 | E | 70 | 1008 |
| 18:00 | 23:00 | 24 | 27.2 | 0.14 | 1.9 | E | 87 | 1007 |
| 19:00 | 00:00 | 23.8 | 26.9 | 0.07 | 1.7 | ESE | 85 | 1007 |
| 20:00 | 01:00 | 23.4 | 26.1 | 0 | 1.7 | SE | 82 | 1008 |
| 21:00 | 02:00 | 22.6 | 24.8 | 0 | 2 | SE | 84 | 1009 |
| 22:00 | 03:00 | 21.9 | 24.1 | 0.15 | 2 | SSE | 88 | 1009 |
| 23:00 | 04:00 | 21.9 | 24.1 | 0.2 | 1.9 | SE | 87 | 1008 |
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
- Washington — 38.500°, -91.000°, ERA5 grid cell center, 6.5 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 30 August 2020 specifically — not a monthly average. See the Washington 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 (2026-07-16). Historical climate data for Washington, United States (38.50°N, 91.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Washington, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 16, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Washington, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 16, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Washington, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-16},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.