May weather forecast
Pasadena, TX

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Weather in May

May carries the warmth of April further, nudging the maximum temperature to 84.4°F (29.1°C) and emphasizing the city's steady stride into summer. Daylight hours lengthen, and Pasadena basks in nearly 14 hours of sunshine every day. Despite the rising temperatures, the city remains good-natured and accommodating, managing to keep the wind speed in check. The month stands out for its sharp increase in rainfall of 4.96" (126mm), indicative of the occasional May showers. Entering into June, these summer precursors flourish into a fully-featured hot season.

Temperature

In May, the average high-temperature in Pasadena marginally rises from a moderately hot 77.7°F (25.4°C) in April to a still warm 84.4°F (29.1°C). Pasadena usually reports an average low-temperature of 70.3°F (21.3°C) during the month of May.

Heat index

May's heat index is estimated at a tropical 93.2°F (34°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Heat index determinations are made taking into account the shade and light air movements. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

In Pasadena, the average relative humidity in May is 75%.

Rainfall

In Pasadena, in May, during 15.2 rainfall days, 4.96" (126mm) of precipitation is typically accumulated. In Pasadena, Texas, during the entire year, the rain falls for 190.8 days and collects up to 41.93" (1065mm) of precipitation.

Snowfall

February through November are months without snowfall in Pasadena.

Daylight

The average length of the day in May in Pasadena is 13h and 39min.
On the first day of the month, sunrise is at 6:37 am and sunset at 7:58 pm. On the last day of May, sunrise is at 6:20 am and sunset at 8:16 pm CDT.

Sunshine

The average sunshine in May is 9.7h.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index in Pasadena. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: An average UV index of 7 in May transforms into this advice:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
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Frequently asked questions

How hot is it in Pasadena in May?

In Pasadena, 84.4°F (29.1°C) is the average high-temperature and 70.3°F (21.3°C) is the average low-temperature during May. The average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in May is estimated at 93.2°F (34°C).

What is the average humidity in May in Pasadena?

In Pasadena, Texas, the average relative humidity in May is 75%.

How many days does it rain in May in Pasadena?

In Pasadena, Texas, in May, during 15.2 rainfall days, 4.96" (126mm) of precipitation is typically accumulated.

When it does not snow in Pasadena?

February through November are months without snowfall in Pasadena.

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

The average day length in May in Pasadena is 13h and 39min.

What time are sunrise and sunset in May in Pasadena?

On the first day of May in Pasadena, sunrise is at 6:37 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 8:16 pm CDT.

How many hours of sunshine does Pasadena have in May?

The average sunshine duration in May is 9.7h.

What are the months with the highest UV index in Pasadena?

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

What is the UV index intensity in May in Pasadena?

In Pasadena, Texas, the average daily maximum UV index in May is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe exposure to Sun's UV rays.
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
Pasadena, TX

Average temperature in May - Pasadena, TX
  • Average high temperature in May: 84.4°F

The warmest month (with the highest average high temperature) is August (92.8°F).
The month with the lowest average high temperature is January (60.6°F).

  • Average low temperature in May: 70.3°F

The month with the highest average low temperature is August (78.4°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).

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Average pressure in May
Pasadena, TX

Average pressure in May - Pasadena, TX
  • Average pressure in May: 29.95"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Pasadena, TX

Average wind speed in May - Pasadena, TX
  • Average wind speed in May: 8.6mph

The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest months (with the lowest average wind speed) are August and September (6.5mph).

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Average humidity in May
Pasadena, TX

Average humidity in May - Pasadena, TX
  • Average humidity in May: 75%

The month with the highest relative humidity is February (79%).
The months with the lowest relative humidity are August and October (71%).

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Average rainfall in May
Pasadena, TX

Average rainfall in May - Pasadena, TX
  • Average rainfall in May: 4.96"

The wettest month (with the highest rainfall) is September (5.94").
The driest month (with the least rainfall) is February (1.89").

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Average rainfall days in May
Pasadena, TX

Average rainfall days in May - Pasadena, TX
  • Average rainfall days in May: 15.2 days

The months with the highest number of rainy days are August and September (21.3 days).
The month with the least rainy days is January (12.3 days).

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Average snowfall in May
Pasadena, TX

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

The months with the highest snowfall are January and December (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in May
Pasadena, TX

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

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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

Average daylight in May / Average sunshine in May - Pasadena, TX
  • Average daylight in May: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in May: 9h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

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Average sunshine days in May
Pasadena, TX

Average sunshine days in May - Pasadena, TX
  • Average sunshine days in May: 13.2 days

The month with the most sunshine days is January (16.4 days).
The months with the least sunshine days are August and September (6.9 days).

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Average UV index in May
Pasadena, TX

Average UV index in May - Pasadena, TX
  • Average UV index in May: 7

The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).

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Average cloud cover in May
Pasadena, TX

Average cloud cover in May - Pasadena, TX
  • Average cloud cover in May: 35

The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June, July and August (Cloud cover 27).

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Average visibility in May
Pasadena, TX

Average visibility in May - Pasadena, 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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Pasadena, Texas, USA

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