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 average high-temperature increases in May, moving from a cool 55°F (12.8°C) in April to a refreshing 67.6°F (19.8°C). Terril, during the nights of May, experiences an average temperature drop to a cool 50.9°F (10.5°C).Humidity
In May, the average relative humidity in Terril is 69%.Rainfall
In Terril, during May, the rain falls for 15.7 days and regularly aggregates up to 3.07" (78mm) of precipitation. Throughout the year, there are 121.8 rainfall days, and 23.27" (591mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.4 snowfall days, in May, Terril aggregates 0.16" (4mm) of snow. In Terril, during the entire year, snow falls for 48.3 days and aggregates up to 21.18" (538mm) of snow.Daylight
The average length of the day in May is 14h and 43min.On the first day of the month, sunrise is at 6:11 am and sunset at 8:22 pm. On the last day of May, sunrise is at 5:42 am and sunset at 8:52 pm CDT.
Sunshine
In Terril, the average sunshine in May is 8.7h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 5 during May morphs into the following directions:
Adopt protective measures - It is advised to guard against sun damage. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Boost your sun resistance with garments that are densely woven yet spacious. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
What is the UV index reading in May?
Average temperature in May
Terril, IA
- Average high temperature in May: 67.6°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 (22.8°F).
- Average low temperature in May: 50.9°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.5°F).
Average pressure in May
Terril, IA
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in May
Terril, IA
- Average wind speed in May: 9.7mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in May
Terril, IA
- Average humidity in May: 69%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (68%).
Average rainfall in May
Terril, IA
- Average rainfall in May: 3.07"
The wettest month (with the highest rainfall) is June (3.46").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in May
Terril, IA
- Average rainfall days in May: 15.7 days
The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is February (3 days).
Average snowfall in May
Terril, IA
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (5.04").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Terril, IA
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is December (11 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Terril, 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 0min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Terril, IA
- Average sunshine days in May: 13.5 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in May
Terril, IA
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in May
Terril, IA
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in May
Terril, IA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Terril, Iowa, USA
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