August weather forecast
Portales, NM

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Silhouette windmill images on a small hill in Portales in NM, below the colorful yellow, orange, and grey sunset sky
Silhouette windmill images on a small hill in Portales in NM, below the colorful yellow, orange, and grey sunset sky

Weather in August

In August, Portales, New Mexico extends its summer ambiance, as temperatures hover between 68.2°F (20.1°C) and 90.1°F (32.3°C). The city radiates life under the hot sun, with long summer days and warm, pleasant evenings. Despite the decrease in rainfall from the peak month of July, August is still marked by regular showers, maintaining a humid atmosphere. It's an ideal time to indulge in water-based activities while attempting to escape the intense summer heat. As the month progresses, the city anticipates the mild respite brought by the fall season.

Temperature

The advent of August denotes an average high-temperature of a still tropical 90.1°F (32.3°C), subtly different from July's 90.5°F (32.5°C). Portales, after an intense day, registers a significant cooling to an average low-temperature of 68.2°F (20.1°C) throughout August.

Heat index

For most parts of August, the heat index is appraised at a hot 93.2°F (34°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Note that heat index values are valued for light wind and location in the shade. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are highly critical to babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.

Humidity

The average relative humidity in August is 46%.

Rainfall

In Portales, in August, during 12.5 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. Throughout the year, there are 86.6 rainfall days, and 11.77" (299mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in August is 13h and 23min.
On the first day of the month, sunrise is at 6:05 am and sunset at 7:54 pm. On the last day of August, sunrise is at 6:26 am and sunset at 7:20 pm MDT.

Sunshine

The average sunshine in August is 11.8h.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In August, the UV index of 7 transforms into the following advice:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in August?

In August, in Portales, the average high-temperature is 90.1°F (32.3°C), and the average low-temperature is 68.2°F (20.1°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 93.2°F (34°C).

What is the average humidity in August?

In August, the average relative humidity is 46%.

How much does it rain in Portales in August?

In Portales, in August, it is raining for 12.5 days, with typically 1.42" (36mm) of accumulated precipitation.

When it does not snow?

In Portales, snow does not fall in May through September.

What is the average length of the day in August?

In Portales, the average day length in August is 13h and 23min.

What time are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 6:05 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:20 pm MDT.

How long on average sun shines in August?

The average sunshine duration in August is 11.8h.

What are the months with the highest UV index?

The months with the highest UV index are June through August, with an average maximum UV index of 7.

What is the UV index reading in August?

The average daily maximum UV index in August is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Portales, NM

Average temperature in August - Portales, NM
  • Average high temperature in August: 90.1°F

The warmest month (with the highest average high temperature) is June (90.7°F).
The month with the lowest average high temperature is December (50°F).

  • Average low temperature in August: 68.2°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is December (31.1°F).

Average pressure in August
Portales, NM

Average pressure in August - Portales, NM
  • Average pressure in August: 29.93"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in August
Portales, NM

Average wind speed in August - Portales, NM
  • Average wind speed in August: 9.9mph

The windiest month (with the highest average wind speed) is April (13.3mph).
The calmest month (with the lowest average wind speed) is August (9.9mph).

Average humidity in August
Portales, NM

Average humidity in August - Portales, NM
  • Average humidity in August: 46%

The month with the highest relative humidity is December (54%).
The month with the lowest relative humidity is April (34%).

Average rainfall in August
Portales, NM

Average rainfall in August - Portales, NM
  • Average rainfall in August: 1.42"

The wettest month (with the highest rainfall) is October (1.81").
The driest month (with the least rainfall) is November (0.28").

Average rainfall days in August
Portales, NM

Average rainfall days in August - Portales, NM
  • Average rainfall days in August: 12.5 days

The month with the highest number of rainy days is July (12.9 days).
The month with the least rainy days is November (2.6 days).

Average snowfall in August
Portales, NM

Average snowfall in August - Portales, NM
  • Average snowfall in August: 0"

The months with the highest snowfall are January and February (1.34").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Portales, NM

Average snowfall days in August - Portales, NM
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (3.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Portales, NM

Average daylight in August / Average sunshine in August - Portales, NM
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in August: 11h and 5min

The month with the most sunshine is June (Average sunshine: 11h and 54min).
The months with the least sunshine are January, February and December (Average sunshine: 7h and 0min).

Average sunshine days in August
Portales, NM

Average sunshine days in August - Portales, NM
  • Average sunshine days in August: 14 days

The month with the most sunshine days is January (26.4 days).
The month with the least sunshine days is August (14 days).

Average UV index in August
Portales, NM

Average UV index in August - Portales, NM
  • Average UV index in August: 7

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in August
Portales, NM

Average cloud cover in August - Portales, NM
  • Average cloud cover in August: 15

The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 13).

Average visibility in August
Portales, NM

Average visibility in August - Portales, NM
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Portales, New Mexico, USA

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