May weather forecast
Decatur, AL

Weather in May

The last month of the spring, May, is a moderately hot month in Decatur, Alabama, with an average temperature ranging between min 59.9°F (15.5°C) and max 78.8°F (26°C).

Temperature

In May, the average high-temperature slightly increases from an agreeable 70.5°F (21.4°C) in April to a moderately hot 78.8°F (26°C). In May, in Decatur, the average low-temperature is 59.9°F (15.5°C).

Humidity

In May, the average relative humidity is 76%.

Rainfall

In Decatur, Alabama, during 16.9 rainfall days, 3.5" (89mm) of precipitation is typically accumulated. In Decatur, during the entire year, the rain falls for 177.6 days and collects up to 43.11" (1095mm) of precipitation.

Snowfall

April through October are months without snowfall in Decatur.

Daylight

In May, the average length of the day is 13h and 59min.
On the first day of the month, sunrise is at 5:57 am and sunset at 7:32 pm. On the last day of May, in Decatur, sunrise is at 5:36 am and sunset at 7:55 pm CDT.

Sunshine

In Decatur, the average sunshine in May is 9.7h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The daily maximum UV index of 6 in May interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in May in Decatur?

The average relative humidity in May in Decatur is 76%.

How many days does it rain in May in Decatur?

In Decatur, in May, it is raining for 16.9 days, with typically 3.5" (89mm) of accumulated precipitation.

When it does not snow in Decatur?

April through October are months without snowfall.

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

In Decatur, the average day length in May is 13h and 59min.

When are sunrise and sunset in May in Decatur?

On the first day of May in Decatur, sunrise is at 5:57 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 7:55 pm CDT.

How many hours of sunshine does Decatur have in May?

In May, the average sunshine duration is 9.7h.

When is the highest UV index in Decatur?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index intensity in May in Decatur?

The average daily maximum UV index in May in Decatur is 6. A UV Index value 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 sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Decatur, AL

Average temperature in May - Decatur, AL
  • Average high temperature in May: 78.8°F

The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (47.5°F).

  • Average low temperature in May: 59.9°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (33.3°F).

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Average pressure in May
Decatur, AL

Average pressure in May - Decatur, AL
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

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Average wind speed in May
Decatur, AL

Average wind speed in May - Decatur, AL
  • Average wind speed in May: 6.4mph

The windiest month (with the highest average wind speed) is February (8.6mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).

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Average humidity in May
Decatur, AL

Average humidity in May - Decatur, AL
  • Average humidity in May: 76%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in May
Decatur, AL

Average rainfall in May - Decatur, AL
  • Average rainfall in May: 3.5"

The wettest month (with the highest rainfall) is December (4.45").
The driest months (with the least rainfall) are September and November (2.48").

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Average rainfall days in May
Decatur, AL

Average rainfall days in May - Decatur, AL
  • Average rainfall days in May: 16.9 days

The month with the highest number of rainy days is July (20 days).
The month with the least rainy days is November (10.4 days).

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Average snowfall in May
Decatur, AL

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

The months with the highest snowfall are January and February (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in May
Decatur, AL

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

The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in May / Average sunshine in May - Decatur, AL
  • Average daylight in May: 13h and 59min

The month with the longest days is June (Average daylight: 14h and 26min).
The month with the shortest days is December (Average daylight: 9h and 53min).

  • Average sunshine in May: 9h and 42min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in May
Decatur, AL

Average sunshine days in May - Decatur, AL
  • Average sunshine days in May: 12.6 days

The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is July (8.8 days).

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Average UV index in May
Decatur, AL

Average UV index in May - Decatur, AL
  • Average UV index in May: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in May
Decatur, AL

Average cloud cover in May - Decatur, AL
  • Average cloud cover in May: 35

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 29).

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Average visibility in May
Decatur, AL

Average visibility in May - Decatur, AL
  • 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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