May weather forecast
Decatur, TX

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Weather in May

May, the last month of the spring in Decatur, is another warm month, with temperature in the range of an average high of 80.6°F (27°C) and an average low of 62.8°F (17.1°C).

Temperature

The onset of May marks a slight increase in the average high-temperature, moving from a warm 74.3°F (23.5°C) in April to a still moderately hot 80.6°F (27°C). Decatur throughout May, experiences an average nighttime temperature of 62.8°F (17.1°C).

Heat index

The heat index value for May is computed to be 84.2°F (29°C). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.
Note that heat index values are valued for light wind and location in the shade. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.

Humidity

May is the most humid month, with an average relative humidity of 74%.

Rainfall

In Decatur, in May, during 15.2 rainfall days, 3.54" (90mm) of precipitation is typically accumulated. In Decatur, during the entire year, the rain falls for 131.9 days and collects up to 28.31" (719mm) of precipitation.

Snowfall

April through November are months without snowfall.

Daylight

The average length of the day in May in Decatur, Texas, is 13h and 53min.
On the first day of the month, sunrise is at 6:41 am and sunset at 8:13 pm. On the last day of May, sunrise is at 6:22 am and sunset at 8:34 pm CDT.

Sunshine

In Decatur, the average sunshine in May is 9.1h.

UV index

In May, the average daily maximum UV index in Decatur is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The UV index of 6 in May translates into these instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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Frequently asked questions

What is the usual temperature for Decatur in May?

The high-temperature, in May, in Decatur, is 80.6°F (27°C), while the low-temperature averages to 62.8°F (17.1°C). In May, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is computed to be 84.2°F (29°C).

What is the most humid month in Decatur?

May is the most humid month in Decatur, with an average relative humidity of 74%.

What is the average humidity in May in Decatur?

In May, the average relative humidity is 74%.

How much does it rain in Decatur in May?

In Decatur, during May, the rain falls for 15.2 days and regularly aggregates up to 3.54" (90mm) of precipitation.

When it does not snow in Decatur?

April through November are months without snowfall in Decatur, Texas.

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

In Decatur, the average day length in May is 13h and 53min.

When are sunrise and sunset in May in Decatur?

On the first day of May in Decatur, Texas, sunrise is at 6:41 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 8:34 pm CDT.

How long on average sun shines in May in Decatur?

In Decatur, the average sunshine duration in May is 9.1h.

How high is the UV index in May in Decatur?

The average daily maximum UV index in May in Decatur is 6. A UV Index estimate of 6 to 7 represents a high health risk from 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
Decatur, TX

Average temperature in May - Decatur, TX
  • Average high temperature in May: 80.6°F

The warmest month (with the highest average high temperature) is August (95.2°F).
The month with the lowest average high temperature is January (54°F).

  • Average low temperature in May: 62.8°F

The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).

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Average pressure in May
Decatur, TX

Average pressure in May - Decatur, TX
  • Average pressure in May: 29.91"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in May
Decatur, TX

Average wind speed in May - Decatur, TX
  • Average wind speed in May: 9.6mph

The windiest months (with the highest average wind speed) are March and April (10.7mph).
The calmest month (with the lowest average wind speed) is September (7mph).

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Average humidity in May
Decatur, TX

Average humidity in May - Decatur, TX
  • Average humidity in May: 74%

The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (56%).

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Average rainfall in May
Decatur, TX

Average rainfall in May - Decatur, TX
  • Average rainfall in May: 3.54"

The wettest month (with the highest rainfall) is October (3.62").
The driest month (with the least rainfall) is January (1.34").

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Average rainfall days in May
Decatur, TX

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

The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (5.7 days).

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Average snowfall in May
Decatur, TX

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

The month with the highest snowfall is February (1.14").
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
Decatur, TX

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

The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in May / Average sunshine in May - Decatur, TX
  • Average daylight in May: 13h and 5min

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

  • Average sunshine in May: 9h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

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Average sunshine days in May
Decatur, TX

Average sunshine days in May - Decatur, TX
  • Average sunshine days in May: 13.5 days

The month with the most sunshine days is January (23.6 days).
The month with the least sunshine days is May (13.5 days).

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Average UV index in May
Decatur, TX

Average UV index in May - Decatur, 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
Decatur, TX

Average cloud cover in May - Decatur, TX
  • Average cloud cover in May: 34

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 18).

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Average visibility in May
Decatur, TX

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

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