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 sees a rise in the average high-temperature, climbing from a moderate 57.4°F (14.1°C) in April to an agreeable 68.5°F (20.3°C). Garrison's nighttime temperature in May falls to an average of 52.3°F (11.3°C).Humidity
In Garrison, the average relative humidity in May is 78%.Rainfall
May is the month with the most rainfall. Rain falls for 13.3 days and accumulates 1.85" (47mm) of precipitation.Snowfall
In Garrison, snow does not fall in May through September.Daylight
In Garrison, Iowa, the average length of the day in May is 14h and 36min.On the first day of the month, sunrise is at 6:02 am and sunset at 8:08 pm. On the last day of May, in Garrison, sunrise is at 5:35 am and sunset at 8:37 pm CDT.
Sunshine
In Garrison, Iowa, the average sunshine in May is 8.5h.UV index
The average daily maximum UV index in May in Garrison is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 5 in May translates into this advice:
Put precautions into practice - Guidance to elude sunburn is provided. To guard against the harmful effects of the Sun, minimize exposure during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Garrison?
What is the average humidity in May in Garrison?
What is the wettest month in Garrison?
How many days does it rain in May in Garrison?
When it does not snow in Garrison?
Does it snow in Garrison in May?
What is the average length of the day in May in Garrison?
When is the sunrise / sunset in May in Garrison?
How long on average sun shines in May in Garrison?
What is the UV index intensity in May in Garrison?
Average temperature in May
Garrison, IA
- Average high temperature in May: 68.5°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (25.3°F).
- Average low temperature in May: 52.3°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in May
Garrison, IA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Garrison, IA
- Average wind speed in May: 9.2mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in May
Garrison, IA
- Average humidity in May: 78%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Garrison, IA
- Average rainfall in May: 1.85"
The wettest month (with the highest rainfall) is May (1.85").
The driest month (with the least rainfall) is February (0.39").
Average rainfall days in May
Garrison, IA
- Average rainfall days in May: 13.3 days
The month with the highest number of rainy days is June (13.9 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in May
Garrison, IA
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Garrison, IA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (7.8 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
Garrison, 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 3min
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
Garrison, IA
- Average sunshine days in May: 14.5 days
The month with the most sunshine days is December (21.9 days).
The month with the least sunshine days is June (13.4 days).
Average UV index in May
Garrison, IA
- Average UV index in May: 5
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Garrison, IA
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in May
Garrison, IA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Garrison, Iowa, USA
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