Home / Tri-Cities / 22 May 2018
Tri-Cities
United States · 22 May 2018
Average
25.7°C
low 15.7°C · high 34.4°C
Rainfall
0mm
dry day
Wind
1.9m/s
daily average
Humidity
34.8%
daily average
Cloud
15%
cover
Pressure
1009hPa
daily average
The temperature ranged from 15.7°C around 06:00 to 34.4°C around 18:00. 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
92th percentile
Low temperature
88th percentile
Rainfall
58th percentile
Wind
19th 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 19.5°C, versus 25.7°C on this specific day.
Sun & daylight
Sunrise
05:16
Sunset
20:31
Day length
15h 15m
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 | 22.1°C | 19.4°C | 0 | 2.7 | S | 36 | 1010 |
| 01:00 | 08:00 | 21.2°C | 18.6°C | 0 | 2.5 | S | 39 | 1010 |
| 02:00 | 09:00 | 19.6°C | 17.6°C | 0 | 2.1 | S | 47 | 1010 |
| 03:00 | 10:00 | 16.1°C | 14.9°C | 0 | 1.4 | SSW | 64 | 1010 |
| 04:00 | 11:00 | 16.7°C | 15.9°C | 0 | 1.3 | SSW | 65 | 1011 |
| 05:00 | 12:00 | 16.6°C | 15.9°C | 0 | 1.4 | S | 69 | 1011 |
| 06:00 | 13:00 | 15.7°C | 15.3°C | 0 | 1.3 | SSW | 75 | 1011 |
| 07:00 | 14:00 | 17.2°C | 16.8°C | 0 | 0.4 | SSW | 60 | 1012 |
| 08:00 | 15:00 | 21.6°C | 20.4°C | 0 | 0 | E | 33 | 1012 |
| 09:00 | 16:00 | 23.6°C | 22.5°C | 0 | 0.3 | N | 33 | 1012 |
| 10:00 | 17:00 | 25.5°C | 24.2°C | 0 | 0.7 | N | 30 | 1011 |
| 11:00 | 18:00 | 27.6°C | 26.4°C | 0 | 1.1 | N | 29 | 1011 |
| 12:00 | 19:00 | 29.3°C | 28°C | 0 | 1.8 | NNE | 29 | 1010 |
| 13:00 | 20:00 | 30.7°C | 28.9°C | 0 | 2.3 | NNE | 26 | 1009 |
| 14:00 | 21:00 | 32.3°C | 29.6°C | 0 | 2.5 | NNE | 19 | 1008 |
| 15:00 | 22:00 | 33.1°C | 30°C | 0 | 2.9 | NNE | 17 | 1007 |
| 16:00 | 23:00 | 33.5°C | 30.3°C | 0 | 3.1 | NNE | 17 | 1006 |
| 17:00 | 00:00 | 34.1°C | 30.8°C | 0 | 3.1 | NNE | 16 | 1006 |
| 18:00 | 01:00 | 34.4°C | 30.5°C | 0 | 3.4 | NNE | 14 | 1005 |
| 19:00 | 02:00 | 34°C | 29.2°C | 0 | 3.4 | NE | 10 | 1005 |
| 20:00 | 03:00 | 32°C | 29.5°C | 0 | 2.1 | NE | 19 | 1005 |
| 21:00 | 04:00 | 28.6°C | 26.2°C | 0 | 1.8 | ENE | 22 | 1005 |
| 22:00 | 05:00 | 26.9°C | 24.7°C | 0 | 2.3 | ESE | 29 | 1006 |
| 23:00 | 06:00 | 24.9°C | 22.8°C | 0 | 2.3 | S | 34 | 1005 |
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 22 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 (2026-07-20). 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 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Tri-Cities, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 20, 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 2026-07-20},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.