Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The shift from April to May is marked by an increase in the average high-temperature, moving from a mild 57.9°F (14.4°C) to an agreeable 68.9°F (20.5°C). In Mount Vernon, May is marked by an average low-temperature of 52.2°F (11.2°C).Humidity
The average relative humidity in May in Mount Vernon is 79%.Rainfall
The month with the most rainfall in Mount Vernon is May, when the rain falls for 19 days and typically aggregates up to 5" (127mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in May in Mount Vernon is 14h and 35min.On the first day of the month, sunrise is at 6:00 am and sunset at 8:04 pm. On the last day of May, sunrise is at 5:32 am and sunset at 8:34 pm CDT.
Sunshine
The average sunshine in May is 8.4h.UV index
In Mount Vernon, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, the maximum UV index of 5 suggests this advice:
Heed the precautions - Suggestions to avoid sunburn are made. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
What is the usual temperature for Mount Vernon in May?
What is the average humidity in May in Mount Vernon?
What is the wettest month in Mount Vernon?
How much does it rain in Mount Vernon in May?
When it does not snow in Mount Vernon?
Does it snow in Mount Vernon in May?
What is the average length of the day in May in Mount Vernon?
When is the sunrise / sunset in May in Mount Vernon?
How long on average sun shines in May in Mount Vernon?
What is the UV index intensity in May in Mount Vernon?
Average temperature in May
Mount Vernon, IA
- Average high temperature in May: 68.9°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in May: 52.2°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).
Average pressure in May
Mount Vernon, IA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Mount Vernon, IA
- Average wind speed in May: 9.1mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in May
Mount Vernon, IA
- Average humidity in May: 79%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in May
Mount Vernon, IA
- Average rainfall in May: 5"
The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days in May
Mount Vernon, IA
- Average rainfall days in May: 19 days
The month with the highest number of rainy days is May (19 days).
The months with the least rainy days are January and February (5.2 days).
Average snowfall in May
Mount Vernon, IA
- Average snowfall in May: 0"
The month with the highest snowfall is January (5.79").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Mount Vernon, IA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Mount Vernon, IA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 2min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Mount Vernon, IA
- Average sunshine days in May: 9.2 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in May
Mount Vernon, IA
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Mount Vernon, IA
- Average cloud cover in May: 44
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in May
Mount Vernon, IA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Mount Vernon, Iowa, USA
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