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
May's arrival is marked by an increase in the average high-temperature, moving from a comfortable 61.9°F (16.6°C) in April to an agreeable 71.8°F (22.1°C). In May, the nighttime temperature lowers to an average of 55°F (12.8°C).Humidity
In May, the average relative humidity is 82%.Rainfall
The month with the most rainfall is May, when the rain falls for 15.8 days and typically aggregates up to 1.5" (38mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In May, the average length of the day in Greencastle, Indiana, is 14h and 23min.On the first day of the month, sunrise is at 6:47 am and sunset at 8:41 pm. On the last day of May, sunrise is at 6:21 am and sunset at 9:08 pm EDT.
Sunshine
In Greencastle, the average sunshine in May is 8.6h.UV index
In Greencastle, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A typical high UV index of 5 in May suggests the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
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?
What is the wettest month?
How many days does it rain in May?
When it does not snow?
Does it snow in May?
What is the average length of the day in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Greencastle have in May?
What is the UV index reading in May?
Average temperature in May
Greencastle, IN
- Average high temperature in May: 71.8°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in May: 55°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in May
Greencastle, IN
- Average pressure in May: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Greencastle, IN
- Average wind speed in May: 8mph
The windiest months (with the highest average wind speed) are January and February (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).
Average humidity in May
Greencastle, IN
- Average humidity in May: 82%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (74%).
Average rainfall in May
Greencastle, IN
- Average rainfall in May: 1.5"
The wettest month (with the highest rainfall) is May (1.5").
The driest month (with the least rainfall) is September (0.67").
Average rainfall days in May
Greencastle, IN
- Average rainfall days in May: 15.8 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in May
Greencastle, IN
- Average snowfall in May: 0"
The month with the highest snowfall is December (1.22").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Greencastle, IN
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Greencastle, IN
- Average daylight in May: 14h and 2min
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: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in May
Greencastle, IN
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is December (21 days).
The month with the least sunshine days is May (12.1 days).
Average UV index in May
Greencastle, IN
- 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, October, November and December (UV index 2).
Average cloud cover in May
Greencastle, IN
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in May
Greencastle, IN
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Greencastle, Indiana, USA
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