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 start of May signals an increase in the average high-temperature, moving from a moderate 56.8°F (13.8°C) in April to an agreeable 69.3°F (20.7°C). Merrillville records an average low of 52.3°F (11.3°C) throughout the nights in May.Humidity
In May, the average relative humidity is 76%.Rainfall
In May, the rain falls for 16.2 days. Throughout May, 3.03" (77mm) of precipitation is accumulated. Throughout the year, there are 146.6 rainfall days, and 23.31" (592mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in May is 14h and 32min.On the first day of the month, sunrise is at 5:45 am and sunset at 7:47 pm. On the last day of May, sunrise is at 5:17 am and sunset at 8:16 pm CDT.
Sunshine
In May, the average sunshine is 8.5h.UV index
In Merrillville, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The UV index of 5 in May translates into these instructions:
Ensure safety - Imperative it is to shield skin and eyes from damage. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May in Merrillville?
How many days does it rain in May?
When it does not snow?
Does it snow in May?
How many hours of daylight does Merrillville have in May?
When are sunrise and sunset in May?
How many hours of sunshine does Merrillville have in May?
What is the UV index intensity in May?
Average temperature in May
Merrillville, IN
- Average high temperature in May: 69.3°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in May: 52.3°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in May
Merrillville, IN
- Average pressure in May: 29.97"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Merrillville, IN
- Average wind speed in May: 8.3mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in May
Merrillville, IN
- Average humidity in May: 76%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in May
Merrillville, IN
- Average rainfall in May: 3.03"
The wettest month (with the highest rainfall) is June (3.15").
The driest month (with the least rainfall) is November (1.06").
Average rainfall days in May
Merrillville, IN
- Average rainfall days in May: 16.2 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in May
Merrillville, IN
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Merrillville, IN
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (12.4 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
Merrillville, IN
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 3min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in May
Merrillville, IN
- Average sunshine days in May: 12 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in May
Merrillville, IN
- 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 and December (UV index 1).
Average cloud cover in May
Merrillville, IN
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in May
Merrillville, IN
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
Merrillville, Indiana, USA
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