Tri-Cities weather in May
In May, Tri-Cities sees average daytime highs of 77°F and overnight lows near 52°F, with 0.7 in of rain across 4.5 wet days and about 14.7 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.
Highs climb over the month, from about 74°F in the first days to 81°F by the end. The sky is clear or mostly clear about 31% of the time in May, and the air most often feels dry.
Daylight stretches from about 14 h 06 min at the start of May to 15 h 18 min by month's end. Set against the rest of the year, May is Tri-Cities's 6th-clearest and 3rd-windiest month. For the whole year in context, see Tri-Cities's year-round climate.
- Daytime high
- 77°
- 5th warmest
- Overnight low
- 52°
- 8th coldest
- Rainfall
- 0.7 in
- 4.5 wet days
- Daylight
- 14 h 48 min
- 4:30 AM – 7:16 PM
- Cloud cover
- 56%
- 6th clearest
- Wind
- 7 mph
- 3rd windiest
- Solar energy
- 6.86 kWh/m²
- Travel score
- 7.6
- out of 10
Temperature in May
Highs climb over the month, from about 74°F in the first days to 81°F by the end.
A typical May day in Tri-Cities reaches about 77°F in the afternoon and slips back to 52°F overnight — a 25°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 91°F. Set against its neighbours, May runs about 10°F warmer than April and about 7°F cooler than June.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 73 | 73 | 74 | 74 | 74 | 75 | 75 | 75 | 76 | 76 | 76 | 77 | 77 | 77 | 77 | 78 | 78 | 78 | 78 | 79 | 79 | 79 | 79 | 80 | 80 | 80 | 80 | 80 | 81 | 81 | 81 |
| Avg low (°F) | 48 | 48 | 48 | 49 | 49 | 49 | 49 | 50 | 50 | 50 | 51 | 51 | 51 | 52 | 52 | 52 | 53 | 53 | 53 | 53 | 54 | 54 | 54 | 54 | 55 | 55 | 55 | 55 | 55 | 55 | 56 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 73 | 48 |
| 2 | 73 | 48 |
| 3 | 74 | 48 |
| 4 | 74 | 49 |
| 5 | 74 | 49 |
| 6 | 75 | 49 |
| 7 | 75 | 49 |
| 8 | 75 | 50 |
| 9 | 76 | 50 |
| 10 | 76 | 50 |
| 11 | 76 | 51 |
| 12 | 77 | 51 |
| 13 | 77 | 51 |
| 14 | 77 | 52 |
| 15 | 77 | 52 |
| 16 | 78 | 52 |
| 17 | 78 | 53 |
| 18 | 78 | 53 |
| 19 | 78 | 53 |
| 20 | 79 | 53 |
| 21 | 79 | 54 |
| 22 | 79 | 54 |
| 23 | 79 | 54 |
| 24 | 80 | 54 |
| 25 | 80 | 55 |
| 26 | 80 | 55 |
| 27 | 80 | 55 |
| 28 | 80 | 55 |
| 29 | 81 | 55 |
| 30 | 81 | 55 |
| 31 | 81 | 56 |
How May really feels in Tri-Cities
Once humidity and wind are folded in, May averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Tri-Cities weather by month
How May compares with the rest of the year at a glance. May is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 41° / 29° | 1.3 | 8.1 | 2.3 | 8.8 | 0.2 |
| Feb | 48° / 32° | 0.9 | 6.2 | 1.3 | 10 | 2.0 |
| Mar | 58° / 38° | 0.9 | 5.9 | 0.4 | 11.6 | 4.6 |
| Apr | 68° / 44° | 0.7 | 4.9 | 0 | 13.3 | 6.9 |
| May | 77° / 52° | 0.7 | 4.5 | 0 | 14.7 | 7.6 |
| Jun | 84° / 58° | 0.5 | 2.8 | 0 | 15.5 | 6.6 |
| Jul | 93° / 64° | 0.1 | 1 | 0 | 15.2 | 3.9 |
| Aug | 92° / 62° | 0.2 | 1 | 0 | 14 | 4.5 |
| Sep | 81° / 54° | 0.3 | 1.8 | 0 | 12.3 | 7.7 |
| Oct | 66° / 44° | 0.9 | 5 | 0 | 10.7 | 6.7 |
| Nov | 50° / 35° | 1.1 | 7.3 | 0.7 | 9.2 | 2.4 |
| Dec | 41° / 29° | 1.4 | 8.4 | 2.4 | 8.5 | 0.1 |
Cloud cover in May
The sky is clear or mostly clear about 31% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 20% of May, with mostly cloudy or overcast conditions the remaining 49%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 52 | 52 | 52 | 52 | 52 | 52 | 51 | 51 | 50 | 50 | 50 | 49 | 49 | 48 | 48 | 48 | 49 | 48 | 48 | 50 | 50 | 51 | 51 | 53 | 53 | 54 | 55 | 55 | 56 | 55 | 56 |
| Cloudier (%) | 48 | 48 | 48 | 48 | 48 | 48 | 49 | 49 | 50 | 50 | 50 | 51 | 51 | 52 | 52 | 52 | 51 | 52 | 52 | 50 | 50 | 49 | 49 | 47 | 47 | 46 | 45 | 45 | 44 | 45 | 44 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 52 | 48 |
| 2 | 52 | 48 |
| 3 | 52 | 48 |
| 4 | 52 | 48 |
| 5 | 52 | 48 |
| 6 | 52 | 48 |
| 7 | 51 | 49 |
| 8 | 51 | 49 |
| 9 | 50 | 50 |
| 10 | 50 | 50 |
| 11 | 50 | 50 |
| 12 | 49 | 51 |
| 13 | 49 | 51 |
| 14 | 48 | 52 |
| 15 | 48 | 52 |
| 16 | 48 | 52 |
| 17 | 49 | 51 |
| 18 | 48 | 52 |
| 19 | 48 | 52 |
| 20 | 50 | 50 |
| 21 | 50 | 50 |
| 22 | 51 | 49 |
| 23 | 51 | 49 |
| 24 | 53 | 47 |
| 25 | 53 | 47 |
| 26 | 54 | 46 |
| 27 | 55 | 45 |
| 28 | 55 | 45 |
| 29 | 56 | 44 |
| 30 | 55 | 45 |
| 31 | 56 | 44 |
Chance of precipitation in May
Tri-Cities gets around 0.7 in of rain over 4.5 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 15% and peaks near 17% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 13 |
| Rain chance (%) | |
|---|---|
| 1 | 13 |
| 2 | 13 |
| 3 | 13 |
| 4 | 13 |
| 5 | 13 |
| 6 | 13 |
| 7 | 13 |
| 8 | 13 |
| 9 | 14 |
| 10 | 14 |
| 11 | 15 |
| 12 | 15 |
| 13 | 16 |
| 14 | 16 |
| 15 | 17 |
| 16 | 17 |
| 17 | 17 |
| 18 | 17 |
| 19 | 17 |
| 20 | 17 |
| 21 | 17 |
| 22 | 16 |
| 23 | 16 |
| 24 | 15 |
| 25 | 15 |
| 26 | 14 |
| 27 | 14 |
| 28 | 14 |
| 29 | 13 |
| 30 | 13 |
| 31 | 13 |
Humidity in May
Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Dry (%) | |
|---|---|
| 1 | 100 |
| 2 | 100 |
| 3 | 100 |
| 4 | 100 |
| 5 | 100 |
| 6 | 100 |
| 7 | 100 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
| 13 | 100 |
| 14 | 100 |
| 15 | 100 |
| 16 | 100 |
| 17 | 100 |
| 18 | 100 |
| 19 | 100 |
| 20 | 100 |
| 21 | 100 |
| 22 | 100 |
| 23 | 100 |
| 24 | 100 |
| 25 | 100 |
| 26 | 100 |
| 27 | 100 |
| 28 | 100 |
| 29 | 100 |
| 30 | 100 |
| 31 | 100 |
Wind in May
Winds average 7 mph in May.
Across May, daily wind ranges from about 7 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 7 | calm |
| 2 | 7 | calm |
| 3 | 7 | calm |
| 4 | 7 | calm |
| 5 | 7 | calm |
| 6 | 7 | calm |
| 7 | 7 | calm |
| 8 | 7 | calm |
| 9 | 7 | calm |
| 10 | 7 | calm |
| 11 | 7 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 7 | calm |
| 18 | 7 | calm |
| 19 | 7 | calm |
| 20 | 7 | calm |
| 21 | 7 | calm |
| 22 | 7 | calm |
| 23 | 7 | calm |
| 24 | 7 | calm |
| 25 | 7 | calm |
| 26 | 7 | calm |
| 27 | 7 | calm |
| 28 | 7 | calm |
| 29 | 7 | calm |
| 30 | 7 | calm |
| 31 | 7 | calm |
Sunrise & sunset in May
Daylight runs from about 14 h 06 min at the start of May to 15 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 72 minutes over May. Sunrise moves from 4:51 AM to 4:16 AM, and sunset from 6:57 PM to 7:32 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.1 | 14.1 | 14.2 | 14.2 | 14.3 | 14.3 | 14.4 | 14.4 | 14.5 | 14.5 | 14.6 | 14.6 | 14.6 | 14.7 | 14.7 | 14.8 | 14.8 | 14.8 | 14.9 | 14.9 | 15.0 | 15.0 | 15.0 | 15.1 | 15.1 | 15.1 | 15.2 | 15.2 | 15.2 | 15.2 | 15.3 |
| Sunrise (AM) | 4:51 | 4:50 | 4:48 | 4:47 | 4:45 | 4:44 | 4:42 | 4:41 | 4:39 | 4:38 | 4:36 | 4:35 | 4:34 | 4:33 | 4:31 | 4:30 | 4:29 | 4:28 | 4:27 | 4:26 | 4:25 | 4:23 | 4:23 | 4:22 | 4:21 | 4:20 | 4:19 | 4:18 | 4:17 | 4:17 | 4:16 |
| Sunset (PM) | 6:57 | 6:58 | 6:59 | 7:01 | 7:02 | 7:03 | 7:05 | 7:06 | 7:07 | 7:08 | 7:10 | 7:11 | 7:12 | 7:13 | 7:15 | 7:16 | 7:17 | 7:18 | 7:20 | 7:21 | 7:22 | 7:23 | 7:24 | 7:25 | 7:26 | 7:27 | 7:28 | 7:29 | 7:30 | 7:31 | 7:32 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.1 | 4:51 | 6:57 |
| 2 | 14.1 | 4:50 | 6:58 |
| 3 | 14.2 | 4:48 | 6:59 |
| 4 | 14.2 | 4:47 | 7:01 |
| 5 | 14.3 | 4:45 | 7:02 |
| 6 | 14.3 | 4:44 | 7:03 |
| 7 | 14.4 | 4:42 | 7:05 |
| 8 | 14.4 | 4:41 | 7:06 |
| 9 | 14.5 | 4:39 | 7:07 |
| 10 | 14.5 | 4:38 | 7:08 |
| 11 | 14.6 | 4:36 | 7:10 |
| 12 | 14.6 | 4:35 | 7:11 |
| 13 | 14.6 | 4:34 | 7:12 |
| 14 | 14.7 | 4:33 | 7:13 |
| 15 | 14.7 | 4:31 | 7:15 |
| 16 | 14.8 | 4:30 | 7:16 |
| 17 | 14.8 | 4:29 | 7:17 |
| 18 | 14.8 | 4:28 | 7:18 |
| 19 | 14.9 | 4:27 | 7:20 |
| 20 | 14.9 | 4:26 | 7:21 |
| 21 | 15.0 | 4:25 | 7:22 |
| 22 | 15.0 | 4:23 | 7:23 |
| 23 | 15.0 | 4:23 | 7:24 |
| 24 | 15.1 | 4:22 | 7:25 |
| 25 | 15.1 | 4:21 | 7:26 |
| 26 | 15.1 | 4:20 | 7:27 |
| 27 | 15.2 | 4:19 | 7:28 |
| 28 | 15.2 | 4:18 | 7:29 |
| 29 | 15.2 | 4:17 | 7:30 |
| 30 | 15.2 | 4:17 | 7:31 |
| 31 | 15.3 | 4:16 | 7:32 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 6.86 kWh/m².
For context, solar energy here swings from a low near 1.26 kWh/m² to a high of 7.85 kWh/m² in July across the year — May's 6.86 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.5 | 6.5 | 6.6 | 6.6 | 6.6 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.9 | 6.9 | 6.9 | 6.9 | 7.0 | 7.0 | 7.0 | 7.0 | 7.1 | 7.1 | 7.1 | 7.2 | 7.2 | 7.2 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.5 | Intense |
| 2 | 6.5 | Intense |
| 3 | 6.6 | Intense |
| 4 | 6.6 | Intense |
| 5 | 6.6 | Intense |
| 6 | 6.7 | Intense |
| 7 | 6.7 | Intense |
| 8 | 6.7 | Intense |
| 9 | 6.7 | Intense |
| 10 | 6.7 | Intense |
| 11 | 6.7 | Intense |
| 12 | 6.8 | Intense |
| 13 | 6.8 | Intense |
| 14 | 6.8 | Intense |
| 15 | 6.8 | Intense |
| 16 | 6.8 | Intense |
| 17 | 6.8 | Intense |
| 18 | 6.9 | Intense |
| 19 | 6.9 | Intense |
| 20 | 6.9 | Intense |
| 21 | 6.9 | Intense |
| 22 | 7.0 | Intense |
| 23 | 7.0 | Intense |
| 24 | 7.0 | Intense |
| 25 | 7.0 | Intense |
| 26 | 7.1 | Intense |
| 27 | 7.1 | Intense |
| 28 | 7.1 | Intense |
| 29 | 7.2 | Intense |
| 30 | 7.2 | Intense |
| 31 | 7.2 | Intense |
Is May a good time to visit Tri-Cities?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is one of the better times to visit Tri-Cities for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Tri-Cities in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Tri-Cities sees daytime highs around 77°F and nights near 52°F. Pack sun protection. Worth having: light clothes. About 5 days see rain.
UV index in Tri-Cities in May
Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Tri-Cities peaks around July 16 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 5 | 7 | 6 | 8 | 6 | 5 | 3 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | Very high | High | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 5 | Moderate |
| May | 7 | Very high |
| Jun | 6 | High |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 5 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Tri-Cities in May
Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.
Air quality in Tri-Cities is worst in August — around 27 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 9 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 10 | 11 | 14 | 11 | 9 | 10 | 13 | 27 | 21 | 12 | 11 | 9 |
| Level | Good | Good | Moderate | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 11 | Good |
| Mar | 14 | Moderate |
| Apr | 11 | Good |
| May | 9 | Good |
| Jun | 10 | Good |
| Jul | 13 | Moderate |
| Aug | 27 | Moderate |
| Sep | 21 | Moderate |
| Oct | 12 | Moderate |
| Nov | 11 | Good |
| Dec | 9 | Good |
Where is Tri-Cities?
Tri-Cities sits at 46.2°N, 119.2°W, 348 ft above sea level, in United States. The nearest listed city is Kennewick, 3.7 mi away.
Topography around Tri-Cities
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Tri-Cities.
Within 2 miles, the terrain around Tri-Cities has only modest variations in elevation — a maximum elevation change of 197 ft around an average of 400 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,677 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,894 ft.
The land around Tri-Cities is covered by artificial surfaces (32%) and grassland (28%) within 2 miles, grassland (38%) and cropland (28%) within 10 miles, and grassland (51%) and cropland (42%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Tri-Cities (46.2454°, -119.1962°, elevation 348 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).