May weather forecast
Mertens, TX

Weather in May

The last month of the spring, May, is also a moderately hot month in Mertens, Texas, with an average temperature fluctuating between 63.7°F (17.6°C) and 81.3°F (27.4°C).

Temperature

In Mertens, the average high-temperature in May slightly increases from a moderately hot 74.7°F (23.7°C) in April to a still warm 81.3°F (27.4°C). The average low-temperature, in May, is 63.7°F (17.6°C).

Heat index

In May, the average heat index is appraised at a hot 86°F (30°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'feels like', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, wind, differences in body mass, height, and shape). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The most humid month is May, with an average relative humidity of 76%.

Rainfall

In Mertens, it is raining for 15.6 days, with typically 3.98" (101mm) of accumulated precipitation. Throughout the year, there are 146.4 rainfall days, and 32.72" (831mm) of precipitation is accumulated.

Snowfall

In Mertens, snow does not fall in April through November.

Daylight

The average length of the day in May in Mertens is 13h and 49min.
On the first day of the month, sunrise is at 6:41 am and sunset at 8:08 pm. On the last day of May, sunrise is at 6:22 am and sunset at 8:28 pm CDT.

Sunshine

In Mertens, the average sunshine in May is 8.6h.

UV index

In Mertens, the average daily maximum UV index in May is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In May, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in May in Mertens?

In May, in Mertens, the average high-temperature is 81.3°F (27.4°C), and the average low-temperature is 63.7°F (17.6°C). in May, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, is appraised at 86°F (30°C).

What is the most humid month in Mertens?

With an average relative humidity of 76%, May is the most humid month.

What is the average humidity in May in Mertens?

The average relative humidity in May in Mertens, Texas, is 76%.

How much does it rain in Mertens in May?

In Mertens, in May, it is raining for 15.6 days, with typically 3.98" (101mm) of accumulated precipitation.

When it does not snow in Mertens?

In Mertens, snow does not fall in April through November.

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

The average day length in May in Mertens, Texas, is 13h and 49min.

When are sunrise and sunset in May in Mertens?

On the first day of May in Mertens, Texas, sunrise is at 6:41 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 8:28 pm CDT.

How long on average sun shines in May in Mertens?

In Mertens, Texas, the average sunshine duration in May is 8.6h.

What is the UV index intensity in May in Mertens?

In Mertens, Texas, the average daily maximum UV index in May is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Mertens, TX

Average temperature in May - Mertens, TX
  • Average high temperature in May: 81.3°F

The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (55.8°F).

  • Average low temperature in May: 63.7°F

The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (39.7°F).

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Average pressure in May
Mertens, TX

Average pressure in May - Mertens, TX
  • Average pressure in May: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in May
Mertens, TX

Average wind speed in May - Mertens, TX
  • Average wind speed in May: 9mph

The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).

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Average humidity in May
Mertens, TX

Average humidity in May - Mertens, TX
  • Average humidity in May: 76%

The month with the highest relative humidity is May (76%).
The month with the lowest relative humidity is August (58%).

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Average rainfall in May
Mertens, TX

Average rainfall in May - Mertens, TX
  • Average rainfall in May: 3.98"

The wettest month (with the highest rainfall) is October (4.57").
The driest month (with the least rainfall) is February (1.85").

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Average rainfall days in May
Mertens, TX

Average rainfall days in May - Mertens, TX
  • Average rainfall days in May: 15.6 days

The months with the highest number of rainy days are May and September (15.6 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall in May
Mertens, TX

Average snowfall in May - Mertens, TX
  • Average snowfall in May: 0"

The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in May
Mertens, TX

Average snowfall days in May - Mertens, TX
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in May /
Average sunshine in May
Mertens, TX

Average daylight in May / Average sunshine in May - Mertens, TX
  • Average daylight in May: 13h and 49min

The month with the longest days is June (Average daylight: 14h and 13min).
The month with the shortest days is December (Average daylight: 10h and 5min).

  • Average sunshine in May: 8h and 36min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

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Average sunshine days in May
Mertens, TX

Average sunshine days in May - Mertens, TX
  • Average sunshine days in May: 13.4 days

The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is September (13.2 days).

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Average UV index in May
Mertens, TX

Average UV index in May - Mertens, TX
  • Average UV index in May: 6

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).

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Average cloud cover in May
Mertens, TX

Average cloud cover in May - Mertens, TX
  • Average cloud cover in May: 38

The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 22).

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Average visibility in May
Mertens, TX

Average visibility in May - Mertens, TX
  • 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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