Home / Tri-Cities / 23 May 2018
Tri-Cities
United States · 23 May 2018
Average
26.7°C
low 19.6°C · high 33.9°C
Rainfall
0.1mm
dry day
Wind
2.2m/s
daily average
Humidity
31.1%
daily average
Cloud
31%
cover
Pressure
1005hPa
daily average
The temperature ranged from 19.6°C around 07:00 to 33.9°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
90th percentile
Low temperature
98th percentile
Rainfall
70th percentile
Wind
33th 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 19.6°C, versus 26.7°C on this specific day.
Sun & daylight
Sunrise
05:15
Sunset
20:32
Day length
15h 17m
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 | 24.6°C | 22.8°C | 0 | 1.6 | SW | 32 | 1005 |
| 01:00 | 08:00 | 23.3°C | 21.6°C | 0 | 1.7 | WSW | 38 | 1005 |
| 02:00 | 09:00 | 23.6°C | 22.7°C | 0 | 1.4 | NW | 42 | 1005 |
| 03:00 | 10:00 | 22.1°C | 20.3°C | 0 | 1.6 | NE | 39 | 1005 |
| 04:00 | 11:00 | 20.6°C | 18.8°C | 0 | 2.2 | E | 47 | 1005 |
| 05:00 | 12:00 | 21.5°C | 20.4°C | 0 | 1.6 | NE | 48 | 1005 |
| 06:00 | 13:00 | 20.3°C | 19.5°C | 0 | 1.4 | NNE | 53 | 1006 |
| 07:00 | 14:00 | 19.6°C | 19°C | 0 | 1.1 | N | 56 | 1006 |
| 08:00 | 15:00 | 23°C | 21.1°C | 0 | 1.2 | N | 32 | 1006 |
| 09:00 | 16:00 | 24.6°C | 22.9°C | 0 | 1.6 | NNW | 33 | 1006 |
| 10:00 | 17:00 | 26.9°C | 24.7°C | 0 | 2.1 | NNW | 28 | 1005 |
| 11:00 | 18:00 | 28.8°C | 27°C | 0 | 2 | NNW | 27 | 1005 |
| 12:00 | 19:00 | 30.5°C | 28.8°C | 0.01 | 2.1 | NNW | 26 | 1004 |
| 13:00 | 20:00 | 31.8°C | 29.6°C | 0.04 | 2.7 | NNW | 24 | 1004 |
| 14:00 | 21:00 | 33.9°C | 30.8°C | 0.04 | 2.6 | NNW | 16 | 1003 |
| 15:00 | 22:00 | 32.9°C | 30.3°C | 0.01 | 3.1 | N | 21 | 1003 |
| 16:00 | 23:00 | 32.6°C | 30.2°C | 0 | 2.5 | NNW | 20 | 1003 |
| 17:00 | 00:00 | 32.6°C | 28.9°C | 0 | 3.9 | N | 19 | 1003 |
| 18:00 | 01:00 | 32°C | 26.5°C | 0 | 5 | NE | 13 | 1003 |
| 19:00 | 02:00 | 31.6°C | 27.1°C | 0 | 3.9 | ENE | 14 | 1004 |
| 20:00 | 03:00 | 28.6°C | 26.5°C | 0 | 1.7 | E | 24 | 1004 |
| 21:00 | 04:00 | 26.4°C | 24.3°C | 0 | 1.3 | S | 25 | 1005 |
| 22:00 | 05:00 | 25.5°C | 23.6°C | 0 | 1.9 | SSW | 32 | 1005 |
| 23:00 | 06:00 | 24.4°C | 22.2°C | 0 | 2.5 | SSW | 36 | 1006 |
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 23 May 2018 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.