Home / Tri-Cities / 9 October 2017
Tri-Cities
United States · 9 October 2017
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Average
10.9°C
low 2.1°C · high 19.2°C
Rainfall
0mm
dry day
Wind
2.1m/s
daily average
Humidity
56.4%
daily average
Cloud
60%
cover
Pressure
1023hPa
daily average
The temperature ranged from 2.1°C around 07:00 to 19.2°C around 17:00. 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
37th percentile
Low temperature
7th percentile
Rainfall
69th percentile
Wind
53th 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 14.4°C, versus 10.9°C on this specific day.
Sun & daylight
Sunrise
07:06
Sunset
18:20
Day length
11h 14m
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 | 07:00 | 8.9°C | 5.4°C | 0 | 2.6 | S | 60 | 1025 |
| 01:00 | 08:00 | 7.2°C | 3.7°C | 0 | 2.6 | S | 70 | 1026 |
| 02:00 | 09:00 | 5.2°C | 1.9°C | 0 | 2.5 | S | 81 | 1025 |
| 03:00 | 10:00 | 3.8°C | 1°C | 0 | 1.8 | S | 91 | 1026 |
| 04:00 | 11:00 | 3.2°C | 0.4°C | 0 | 1.7 | S | 93 | 1026 |
| 05:00 | 12:00 | 2.8°C | -0.3°C | 0 | 2.1 | S | 94 | 1026 |
| 06:00 | 13:00 | 2.3°C | -1.1°C | 0 | 2.4 | S | 95 | 1026 |
| 07:00 | 14:00 | 2.1°C | -1.3°C | 0 | 2.4 | S | 96 | 1026 |
| 08:00 | 15:00 | 5.6°C | 3°C | 0 | 1.7 | S | 88 | 1027 |
| 09:00 | 16:00 | 8.4°C | 5.7°C | 0 | 1.7 | S | 69 | 1027 |
| 10:00 | 17:00 | 10.9°C | 7.9°C | 0 | 1.8 | S | 54 | 1027 |
| 11:00 | 18:00 | 13.3°C | 10°C | 0 | 2.3 | SSW | 47 | 1026 |
| 12:00 | 19:00 | 15°C | 11.6°C | 0 | 2.6 | SSW | 42 | 1025 |
| 13:00 | 20:00 | 16.5°C | 13.1°C | 0 | 2.5 | SSW | 37 | 1024 |
| 14:00 | 21:00 | 18.8°C | 15.2°C | 0 | 2.3 | SSW | 29 | 1023 |
| 15:00 | 22:00 | 18.7°C | 15.2°C | 0 | 2.1 | S | 27 | 1021 |
| 16:00 | 23:00 | 18.8°C | 15.5°C | 0 | 1.7 | SSE | 26 | 1021 |
| 17:00 | 00:00 | 19.2°C | 16°C | 0 | 1.3 | SE | 24 | 1020 |
| 18:00 | 01:00 | 18.8°C | 15.7°C | 0 | 1.4 | E | 26 | 1019 |
| 19:00 | 02:00 | 17.9°C | 14.3°C | 0 | 1.9 | NE | 26 | 1018 |
| 20:00 | 03:00 | 14.9°C | 11.2°C | 0 | 2.2 | NE | 34 | 1018 |
| 21:00 | 04:00 | 11.7°C | 7.9°C | 0 | 2.3 | NE | 41 | 1017 |
| 22:00 | 05:00 | 9.5°C | 5.9°C | 0 | 2.2 | NE | 51 | 1017 |
| 23:00 | 06:00 | 8.8°C | 5.4°C | 0 | 2.1 | ENE | 54 | 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
- Tri-Cities — 46.250°, -119.250°, ERA5 grid cell center, 4.2 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 9 October 2017 specifically — not a monthly average. See the Tri-Cities 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 (2026-07-21). Historical climate data for Tri-Cities, United States (46.25°N, 119.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Tri-Cities, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Tri-Cities, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Tri-Cities, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.