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
In May, the average high-temperature increases from a moderate 58.3°F (14.6°C) in April to a pleasant 69.4°F (20.8°C). An average nighttime temperature of 53.2°F (11.8°C) is witnessed throughout May.Humidity
In Blue Grass, the average relative humidity in May is 78%.Rainfall
The month with the most rainfall is May, when the rain falls for 19.6 days and typically aggregates up to 5" (127mm) of precipitation.Snowfall
In Blue Grass, snow does not fall in May through September.Daylight
The average length of the day in May is 14h and 32min.On the first day of May, sunrise is at 5:58 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:30 pm CDT.
Sunshine
In Blue Grass, the average sunshine in May is 8.8h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 5 during May leads to these instructions:
Guard yourself - Avoiding sunburn is suggested. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Stay sun-safe with clothing that is both closely woven and worn loosely.
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?
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?
When are sunrise and sunset in May?
How long on average sun shines in May?
What is the UV index reading in May?
Average temperature in May
Blue Grass, IA
- Average high temperature in May: 69.4°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27.7°F).
- Average low temperature in May: 53.2°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in May
Blue Grass, IA
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Blue Grass, IA
- Average wind speed in May: 8.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in May
Blue Grass, IA
- Average humidity in May: 78%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Blue Grass, IA
- Average rainfall in May: 5"
The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days in May
Blue Grass, IA
- Average rainfall days in May: 19.6 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is January (4.6 days).
Average snowfall in May
Blue Grass, IA
- Average snowfall in May: 0"
The month with the highest snowfall is January (4.88").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Blue Grass, IA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (11.6 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
Blue Grass, IA
- 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Blue Grass, IA
- Average sunshine days in May: 8.3 days
The month with the most sunshine days is December (17.4 days).
The months with the least sunshine days are May and June (8.3 days).
Average UV index in May
Blue Grass, IA
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Blue Grass, IA
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in May
Blue Grass, IA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Blue Grass, Iowa, USA
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