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
With the onset of May, Thornton experiences a temperature shift, with the average high-temperature moving from a moderate 55.8°F (13.2°C) in April to an agreeable 68°F (20°C). Throughout May, Thornton's nights cool down to an average of 51.8°F (11°C).Humidity
In Thornton, the average relative humidity in May is 73%.Rainfall
In Thornton, Iowa, during May, the rain falls for 18.3 days and regularly aggregates up to 3.39" (86mm) of precipitation. In Thornton, during the entire year, the rain falls for 136.3 days and collects up to 26.18" (665mm) of precipitation.Snowfall
Months with snowfall in Thornton, Iowa, are January through May, October through December. May is the last month it regularly snows in Thornton. During 0.3 snowfall days, in May, Thornton aggregates 0.35" (9mm) of snow. In Thornton, during the entire year, snow falls for 44.7 days and aggregates up to 20.51" (521mm) of snow.Daylight
The average length of the day in May in Thornton, Iowa, is 14h and 40min.On the first day of the month, sunrise is at 6:06 am and sunset at 8:14 pm. On the last day of May, sunrise is at 5:37 am and sunset at 8:45 pm CDT.
Sunshine
In May, the average sunshine is 8.5h.UV index
In Thornton, Iowa, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 5 during May translates into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Thornton?
What is the average humidity in May in Thornton?
How much does it rain in Thornton in May?
What is the last month it snows in Thornton?
How many hours of daylight does Thornton have in May?
When is the sunrise / sunset in May in Thornton?
How long on average sun shines in May in Thornton?
How high is the UV index in May in Thornton?
Average temperature in May
Thornton, IA
- Average high temperature in May: 68°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in May: 51.8°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in May
Thornton, IA
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in May
Thornton, IA
- Average wind speed in May: 9.6mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in May
Thornton, IA
- Average humidity in May: 73%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (70%).
Average rainfall in May
Thornton, IA
- Average rainfall in May: 3.39"
The wettest month (with the highest rainfall) is June (3.98").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in May
Thornton, IA
- Average rainfall days in May: 18.3 days
The month with the highest number of rainy days is June (18.6 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in May
Thornton, IA
- Average snowfall in May: 0.35"
The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Thornton, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Thornton, IA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Thornton, IA
- Average sunshine days in May: 11.5 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (10 days).
Average UV index in May
Thornton, IA
- Average UV index in May: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in May
Thornton, IA
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in May
Thornton, IA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Thornton, Iowa, USA
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