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 is characterized by an increase in the average high-temperature, transitioning from a mild 57.9°F (14.4°C) in April to a pleasant 69.3°F (20.7°C). In Grand Mound, an average temperature of 52.3°F (11.3°C) is noted during May nights.Humidity
The average relative humidity in May is 78%.Rainfall
The month with the most rainfall in Grand Mound is May, when the rain falls for 18.2 days and typically aggregates up to 4.61" (117mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in May is 14h and 34min.On the first day of the month, sunrise is at 5:57 am and sunset at 8:01 pm. On the last day of May, sunrise is at 5:30 am and sunset at 8:30 pm CDT.
Sunshine
The average sunshine in May is 8.6h.UV index
In Grand Mound, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, an average UV index of 5 transforms into the following instructions:
Exercise prevention - Precautions against solar damage are endorsed. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
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 rainiest 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 in Grand Mound?
What time 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
Grand Mound, IA
- Average high temperature in May: 69.3°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (26.6°F).
- Average low temperature in May: 52.3°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in May
Grand Mound, 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
Grand Mound, IA
- Average wind speed in May: 8.9mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in May
Grand Mound, IA
- Average humidity in May: 78%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in May
Grand Mound, IA
- Average rainfall in May: 4.61"
The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days in May
Grand Mound, IA
- Average rainfall days in May: 18.2 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in May
Grand Mound, IA
- Average snowfall in May: 0"
The month with the highest snowfall is January (5.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Grand Mound, IA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (11.5 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
Grand Mound, IA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 4min
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 54min).
Average sunshine days in May
Grand Mound, IA
- Average sunshine days in May: 10.7 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in May
Grand Mound, IA
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Grand Mound, IA
- 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 30).
Average visibility in May
Grand Mound, IA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Grand Mound, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location