Dumas in Summer
In summer (June, July and August), Dumas sees average daytime highs around 90°F and overnight lows near 66°F, with 6.6 in of rain over about 26 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 90°F. The sky is clear or mostly clear about 55% of the time across summer, and the air most often feels comfortable.
Summer is Dumas's 3rd-best season to visit on our travel score. For the whole year in context, see Dumas's year-round climate.
- Avg daytime high
- 90°F
- warmest season of the year
- Avg overnight low
- 66°F
- Rainfall
- 6.6 in
- 26 wet days
- Avg wind
- 10 mph
- Travel score
- 4.3
- 3rd-best season
- Months
- Jun · Jul · Aug
Temperature in Dumas in Summer
Across summer, daytime highs hold fairly steady around 90°F.
A typical summer day in Dumas reaches about 90°F and drops to 66°F overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Dumas
Once humidity and wind are folded in, summer brings about 55 days that feel above 90°F and 0 that feel at or below 32°F.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Dumas weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 50° / 26° | 0.7 | 2.8 | 1.6 | 9.8 | 2.7 |
| Feb | 54° / 29° | 0.6 | 3.1 | 1.6 | 10.6 | 4.0 |
| Mar | 63° / 36° | 1.4 | 5 | 1.4 | 11.7 | 6.4 |
| Apr | 71° / 44° | 1.6 | 5.4 | 0.4 | 12.9 | 7.5 |
| May | 79° / 54° | 2.2 | 7 | 0 | 13.9 | 7.2 |
| Jun | 89° / 63° | 2.0 | 8.3 | 0 | 14.4 | 4.7 |
| Jul | 91° / 67° | 2.0 | 8 | 0 | 14.2 | 3.8 |
| Aug | 89° / 66° | 2.5 | 9.2 | 0 | 13.4 | 4.4 |
| Sep | 83° / 59° | 1.3 | 5.7 | 0 | 12.2 | 6.9 |
| Oct | 72° / 47° | 1.6 | 4.9 | 0.4 | 11.1 | 8.0 |
| Nov | 60° / 35° | 0.8 | 3.4 | 1.2 | 10.1 | 5.7 |
| Dec | 50° / 27° | 1.0 | 3.7 | 2.4 | 9.6 | 2.8 |
Cloud cover in Summer
The sky is clear or mostly clear about 55% of the time across summer.
Chance of precipitation in Summer
Dumas gets around 6.6 in of rain over 26 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 10 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 12 min in early June to 12 h 48 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 7.1 kWh/m².
Is summer a good time to visit Dumas?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Dumas for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Dumas in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Dumas sees daytime highs around 90°F and nights near 66°F. Pack light clothes and sun protection. Worth having: rain gear. About 26 days see rain.
UV index in Dumas in Summer
Clear-sky midday UV across summer averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Dumas peaks around July 11 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 4 | 5 | 9 | 9 | 11 | 11 | 10 | 8 | 5 | 4 | 3 |
| Level | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 5 | Moderate |
| Apr | 9 | Very high |
| May | 9 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 5 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Where is Dumas?
Dumas sits at 35.9°N, 102.0°W, 3,661 ft above sea level, in United States. The nearest listed city is Amarillo, 45 mi away.
Topography around Dumas
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Dumas.
Within 2 miles, the terrain around Dumas has only modest variations in elevation — a maximum elevation change of 138 ft around an average of 3,658 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 623 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,713 ft.
The land around Dumas is covered by grassland (44%), artificial surfaces (28%) and cropland (24%) within 2 miles, grassland (55%) and cropland (43%) within 10 miles, and grassland (68%) and cropland (31%) 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 Dumas (35.8656°, -101.9732°, elevation 3,661 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.