May weather forecast
Jefferson, AL

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Weather in May

The last month of the spring, May, is another warm month in Jefferson, Alabama, with an average temperature varying between 62.4°F (16.9°C) and 84°F (28.9°C).

Temperature

May's onset witnesses a minor shift in the average high-temperature, moving from 76.6°F (24.8°C) in April to a still warm 84°F (28.9°C). Jefferson's average nighttime temperature descends significantly from the day's peak in May, settling at a comfortable 62.4°F (16.9°C).

Heat index

The average heat index in May is estimated at a hot 91.4°F (33°C). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.

Humidity

The average relative humidity in May is 73%.

Rainfall

In Jefferson, in May, it is raining for 12.7 days, with typically 2.24" (57mm) of accumulated precipitation. Throughout the year, in Jefferson, there are 153.9 rainfall days, and 33.23" (844mm) of precipitation is accumulated.

Snowfall

March through October are months without snowfall.

Daylight

In Jefferson, the average length of the day in May is 13h and 50min.
On the first day of the month, sunrise is at 6:04 am and sunset at 7:33 pm. On the last day of May, in Jefferson, sunrise is at 5:45 am and sunset at 7:53 pm CDT.

Sunshine

The average sunshine in May in Jefferson is 9.9h.

UV index

The average daily maximum UV index in May is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 6 during May translates into the following guidance:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
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Frequently asked questions

How hot does it get in Jefferson in May?

The average high-temperature, in May, in Jefferson, is 84°F (28.9°C), while the average low-temperature is 62.4°F (16.9°C). In May, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is estimated at 91.4°F (33°C).

What is the average humidity in May in Jefferson?

In May, the average relative humidity in Jefferson, Alabama, is 73%.

How much does it rain in Jefferson in May?

In Jefferson, Alabama, in May, it is raining for 12.7 days, with typically 2.24" (57mm) of accumulated precipitation.

When it does not snow in Jefferson?

March through October are months without snowfall in Jefferson.

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

The average day length in May in Jefferson is 13h and 50min.

What time are sunrise and sunset in May in Jefferson?

On the first day of May, sunrise is at 6:04 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 7:53 pm CDT.

How long on average sun shines in May in Jefferson?

In Jefferson, Alabama, the average sunshine duration in May is 9.9h.

What is the UV index intensity in May in Jefferson?

The average daily maximum UV index in May in Jefferson is 6. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to 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
Jefferson, AL

Average temperature in May - Jefferson, AL
  • Average high temperature in May: 84°F

The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is January (54.1°F).

  • Average low temperature in May: 62.4°F

The month with the highest average low temperature is July (72.7°F).
The coldest month (with the lowest average low temperature) is January (38.3°F).

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Average pressure in May
Jefferson, AL

Average pressure in May - Jefferson, AL
  • Average pressure in May: 30"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).

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Average wind speed in May
Jefferson, AL

Average wind speed in May - Jefferson, AL
  • Average wind speed in May: 5.8mph

The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

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Average humidity in May
Jefferson, AL

Average humidity in May - Jefferson, AL
  • Average humidity in May: 73%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (69%).

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Average rainfall in May
Jefferson, AL

Average rainfall in May - Jefferson, AL
  • Average rainfall in May: 2.24"

The wettest months (with the highest rainfall) are April and December (3.74").
The driest month (with the least rainfall) is September (1.65").

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Average rainfall days in May
Jefferson, AL

Average rainfall days in May - Jefferson, AL
  • Average rainfall days in May: 12.7 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is October (8.3 days).

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Average snowfall in May
Jefferson, AL

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

The month with the highest snowfall is January (0.43").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").

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Average snowfall days in May
Jefferson, AL

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

The month with the highest number of snowfall days is January (0.9 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
Jefferson, AL

Average daylight in May / Average sunshine in May - Jefferson, AL
  • Average daylight in May: 13h and 5min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

  • Average sunshine in May: 9h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

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Average sunshine days in May
Jefferson, AL

Average sunshine days in May - Jefferson, AL
  • Average sunshine days in May: 17.3 days

The month with the most sunshine days is October (22.4 days).
The month with the least sunshine days is July (10.4 days).

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Average UV index in May
Jefferson, AL

Average UV index in May - Jefferson, AL
  • 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
Jefferson, AL

Average cloud cover in May - Jefferson, AL
  • Average cloud cover in May: 34

The months with the most cloud cover are February and December (Cloud cover 48).
The months with the least cloud cover are September and October (Cloud cover 30).

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Average visibility in May
Jefferson, AL

Average visibility in May - Jefferson, 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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Jefferson, Alabama, USA

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