Home / Washington / 30 August 2017
Washington
United States · 30 August 2017
← 29 August 201731 August 2017 →
Average
22°C
low 15.6° · high 27.6°
Rainfall
0mm
dry day
Wind
2m/s
daily average
Humidity
74.9%
daily average
Cloud
40%
cover
Pressure
1017hPa
daily average
The temperature ranged from 15.6°C around 07:00 to 27.6°C around 14:00. No measurable rain was recorded during the day.
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
36th percentile
Low temperature
21th percentile
Rainfall
39th percentile
Wind
37th 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 23.9°C, versus 22°C on this specific day.
Sun & daylight
Sunrise
06:31
Sunset
19:36
Day length
13h 5m
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 | 19.9 | 0 | 2.1 | NE | 88 | 1016 |
| 01:00 | 06:00 | 18.8 | 19.8 | 0 | 1.9 | NE | 88 | 1016 |
| 02:00 | 07:00 | 18.8 | 20 | 0 | 1.6 | NE | 88 | 1016 |
| 03:00 | 08:00 | 18 | 18.8 | 0 | 1.9 | NNE | 89 | 1016 |
| 04:00 | 09:00 | 18 | 18.5 | 0 | 2.1 | NNE | 89 | 1016 |
| 05:00 | 10:00 | 16 | 16.6 | 0 | 1.7 | NNE | 97 | 1017 |
| 06:00 | 11:00 | 15.8 | 16.4 | 0 | 1.7 | NNE | 97 | 1017 |
| 07:00 | 12:00 | 15.6 | 16.2 | 0 | 1.6 | NNE | 98 | 1018 |
| 08:00 | 13:00 | 17.9 | 19.7 | 0 | 1 | NNE | 96 | 1018 |
| 09:00 | 14:00 | 20.1 | 22.4 | 0 | 0.7 | NE | 87 | 1018 |
| 10:00 | 15:00 | 23.5 | 24.9 | 0.01 | 1.2 | NNE | 65 | 1019 |
| 11:00 | 16:00 | 25.4 | 26.6 | 0.02 | 2 | NNE | 62 | 1018 |
| 12:00 | 17:00 | 26.4 | 27.2 | 0 | 2.2 | NE | 57 | 1018 |
| 13:00 | 18:00 | 27 | 27.8 | 0 | 2.3 | NE | 55 | 1017 |
| 14:00 | 19:00 | 27.6 | 28.4 | 0.01 | 2.5 | NE | 53 | 1017 |
| 15:00 | 20:00 | 27.6 | 28.1 | 0 | 2.6 | NE | 52 | 1016 |
| 16:00 | 21:00 | 27.2 | 27.6 | 0 | 2.6 | NE | 52 | 1016 |
| 17:00 | 22:00 | 27.1 | 28.6 | 0 | 2.1 | ENE | 60 | 1015 |
| 18:00 | 23:00 | 26.5 | 28.4 | 0 | 1.9 | ENE | 64 | 1016 |
| 19:00 | 00:00 | 25.2 | 26.8 | 0 | 1.9 | NE | 66 | 1016 |
| 20:00 | 01:00 | 23.2 | 23.9 | 0 | 2.2 | NE | 67 | 1016 |
| 21:00 | 02:00 | 21.9 | 22.1 | 0 | 2.6 | NE | 70 | 1016 |
| 22:00 | 03:00 | 20.8 | 21.1 | 0 | 3.1 | NE | 79 | 1017 |
| 23:00 | 04:00 | 20.7 | 20.8 | 0 | 3.2 | NE | 79 | 1017 |
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 2017 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 (2026-07-17). 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 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Washington, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 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 2026-07-17},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.