May 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 May

Heat seeps into the city of Portales, New Mexico in May, as temperatures continue to climb, with a range from 55.4°F (13°C) to 80.1°F (26.7°C). The vibrant colors of flora become more vivid under the bright, abundant sunshine. Marked by the highest rainfall of 1.02" (26mm), the city is abuzz with life and activity. The ever-increasing daylight and warm weather make for perfect strolls in the park or garden picnics. The city shakes off the final remnants of the spring chill and embraces the approaching summer heat.

Temperature

With the start of May, the average high-temperature marginally shifts from April's pleasant 72.3°F (22.4°C) to a moderately hot 80.1°F (26.7°C). In the month of May, Portales witnesses a marked temperature drop at night, averaging a low of 55.4°F (13°C).

Humidity

The average relative humidity in May is 36%.

Rainfall

In Portales, in May, it is raining for 8 days, with typically 1.02" (26mm) of accumulated precipitation. In Portales, during the entire year, the rain falls for 86.6 days and collects up to 11.77" (299mm) of precipitation.

Snowfall

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

Daylight

In Portales, the average length of the day in May is 13h and 58min.
On the first day of May, sunrise is at 6:02 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 7:59 pm MDT.

Sunshine

In Portales, the average sunshine in May is 11.4h.

UV index

In May, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 6 in May translates into these instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
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Frequently asked questions

What are May temperatures in Portales?

The average high-temperature and low-temperature in Portales during May are 80.1°F (26.7°C) and 55.4°F (13°C) respectively.

What is the average humidity in May in Portales?

In May, the average relative humidity in Portales, New Mexico, is 36%.

How much does it rain in Portales in May?

In Portales, New Mexico, during May, the rain falls for 8 days and regularly aggregates up to 1.02" (26mm) of precipitation.

When it does not snow in Portales?

May through September are months without snowfall in Portales.

Does it snow in Portales in May?

In May, it doesn't snow. April is the latest month when it typically snows.

What is the average length of the day in May in Portales?

In May, the average day length is 13h and 58min.

What time are sunrise and sunset in May in Portales?

In May, on the first day of the month, sunrise is at 6:02 am and sunset at 7:37 pm. On the last day of the month, in Portales, sunrise is at 5:42 am and sunset at 7:59 pm MDT.

How long on average sun shines in May in Portales?

The average sunshine duration in May in Portales, New Mexico, is 11.4h.

What is the UV index reading in May in Portales?

The average daily maximum UV index in May in Portales is 6. A UV Index estimate of 6 to 7 represents a high health threat 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 May
Portales, NM

Average temperature in May - Portales, NM
  • Average high temperature in May: 80.1°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 May: 55.4°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).

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Average pressure in May
Portales, NM

Average pressure in May - Portales, NM
  • Average pressure in May: 29.86"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).

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Average wind speed in May
Portales, NM

Average wind speed in May - Portales, NM
  • Average wind speed in May: 12.6mph

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).

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Average humidity in May
Portales, NM

Average humidity in May - Portales, NM
  • Average humidity in May: 36%

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

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Average rainfall in May
Portales, NM

Average rainfall in May - Portales, NM
  • Average rainfall in May: 1.02"

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

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Average rainfall days in May
Portales, NM

Average rainfall days in May - Portales, NM
  • Average rainfall days in May: 8 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).

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Average snowfall in May
Portales, NM

Average snowfall in May - Portales, NM
  • Average snowfall in May: 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").

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Average snowfall days in May
Portales, NM

Average snowfall days in May - Portales, NM
  • Average snowfall days in May: 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).

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

Average daylight in May / Average sunshine in May - Portales, NM
  • Average daylight in May: 14h and 0min

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 May: 11h and 2min

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).

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Average sunshine days in May
Portales, NM

Average sunshine days in May - Portales, NM
  • Average sunshine days in May: 21.4 days

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

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Average UV index in May
Portales, NM

Average UV index in May - Portales, NM
  • Average UV index in May: 6

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).

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Average cloud cover in May
Portales, NM

Average cloud cover in May - Portales, NM
  • Average cloud cover in May: 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).

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Average visibility in May
Portales, NM

Average visibility in May - Portales, NM
  • Average visibility in May: 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).

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Portales, New Mexico, USA

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