May weather forecastHannibal, MO
May
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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: 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: 14h and 24min
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 18min
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: 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: 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: 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: 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).
