May weather forecast
Hannibal, MO

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The stunning Mark Twain Memorial Lighthouse stands tall in white among the surrounding rocks and greenery in Hannibal, Missouri
The stunning Mark Twain Memorial Lighthouse stands tall in white among the surrounding rocks and greenery in Hannibal, Missouri

Weather in May

May amounts to an amplified version of Hannibal's spring, marked by a considerable rise in temperatures and increased daylight hours. The last vestiges of winter disappear, with no trace of snowfall. Additionally, May witnesses prolific rainfall that nurtures blooming flora and paints the city with a burst of colors and vitality. The most notable weather feature is the all-year-high rainfall of 3.39" (86mm). Despite the rain, visibly longer days and warming weather make May an appealing time to experience Hannibal's attractions.

Temperature

In Hannibal, the average high-temperature in May increases from a comfortable 63.5°F (17.5°C) in April to a pleasant 72.7°F (22.6°C). Hannibal's temperature drops to an average low of 55.8°F (13.2°C) during the nights of May.

Humidity

The months with the highest humidity are May through July, with an average relative humidity of 80%.

Rainfall

May is the month with the most rainfall. Rain falls for 17.3 days and accumulates 3.39" (86mm) of precipitation.

Snowfall

In Hannibal, snow does not fall in May through October.

Daylight

In Hannibal, the average length of the day in May is 14h and 23min.
On the first day of the month, sunrise is at 6:04 am and sunset at 8:00 pm. On the last day of May, sunrise is at 5:39 am and sunset at 8:26 pm CDT.

Sunshine

In May, the average sunshine is 9.3h.

UV index

In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In May, the maximum UV index of 5 translates into these guidelines:
Exercise prevention - Precautions against solar damage are endorsed. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Stay sun-safe with clothing that is both closely woven and worn loosely.

Frequently asked questions

What is the average May temperature?

The average high-temperature and low-temperature during May are 72.7°F (22.6°C) and 55.8°F (13.2°C) respectively.

What is the most humid month?

The months with the highest humidity are May through July, with an average relative humidity of 80%.

What is the average humidity in May?

In May, the average relative humidity is 80%.

What is the wettest month?

May is the month with the most rainfall. Rain falls for 17.3 days and accumulates 3.39" (86mm) of precipitation.

How much does it rain in May?

In Hannibal, in May, it is raining for 17.3 days, with typically 3.39" (86mm) of accumulated precipitation.

When it does not snow?

May through October are months without snowfall.

Does it snow in Hannibal in May?

In May, in Hannibal, Missouri, it doesn't snow. April is the latest month when it typically snows.

How many hours of daylight does Hannibal have in May?

In Hannibal, the average day length in May is 14h and 23min.

When is the sunrise / sunset in May?

On the first day of May, sunrise is at 6:04 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:26 pm CDT.

How long on average sun shines in May?

The average sunshine duration in May in Hannibal is 9.3h.

What is the UV index reading in May?

In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health 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
Hannibal, MO

Average temperature in May - Hannibal, MO
  • Average high temperature in May: 72.7°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in May: 55.8°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

Average pressure in May
Hannibal, MO

Average pressure in May - Hannibal, MO
  • Average pressure in May: 29.94"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in May
Hannibal, MO

Average wind speed in May - Hannibal, MO
  • Average wind speed in May: 8mph

The windiest months (with the highest average wind speed) are January, February and April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

Average humidity in May
Hannibal, MO

Average humidity in May - Hannibal, MO
  • Average humidity in May: 80%

The months with the highest relative humidity are May, June and July (80%).
The month with the lowest relative humidity is October (70%).

Average rainfall in May
Hannibal, MO

Average rainfall in May - Hannibal, MO
  • Average rainfall in May: 3.39"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is January (1.14").

Average rainfall days in May
Hannibal, MO

Average rainfall days in May - Hannibal, MO
  • Average rainfall days in May: 17.3 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (5.3 days).

Average snowfall in May
Hannibal, MO

Average snowfall in May - Hannibal, MO
  • Average snowfall in May: 0"

The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in May
Hannibal, MO

Average snowfall days in May - Hannibal, MO
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Hannibal, MO

Average daylight in May / Average sunshine in May - Hannibal, MO
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in May: 9h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

Average sunshine days in May
Hannibal, MO

Average sunshine days in May - Hannibal, MO
  • Average sunshine days in May: 11.8 days

The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is June (11.6 days).

Average UV index in May
Hannibal, MO

Average UV index in May - Hannibal, MO
  • Average UV index in May: 5

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

Average cloud cover in May
Hannibal, MO

Average cloud cover in May - Hannibal, MO
  • Average cloud cover in May: 37

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 27).

Average visibility in May
Hannibal, MO

Average visibility in May - Hannibal, MO
  • 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).

Hannibal, Missouri, USA

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