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
Chelsea's May weather shows an increase in high-temperatures, moving from April's moderate 57.7°F (14.3°C) to a pleasant 68.7°F (20.4°C). In May, the average low-temperature records at a fresh 52.2°F (11.2°C) during the nights.Humidity
In Chelsea, the average relative humidity in May is 78%.Rainfall
May is the month with the most rainfall. Rain falls for 18.1 days and accumulates 4.61" (117mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Chelsea. During 0.2 snowfall days, in May, Chelsea aggregates 0.12" (3mm) of snow. Throughout the year, there are 39 snowfall days, and 16.69" (424mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 35min.On the first day of May, sunrise is at 6:04 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:38 pm CDT.
Sunshine
The average sunshine in May in Chelsea is 8.5h.UV index
In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 5 during May leads to these advisories:
Take necessary precautions - Suggestions to elude sunburn are provided. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Boost your sun resistance with garments that are densely woven yet spacious. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
What is the wettest month?
How many days does it rain in May?
What is the last month it snows?
How many hours of daylight does Chelsea have in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Chelsea have in May?
What is the UV index intensity in May?
Average temperature in May
Chelsea, IA
- Average high temperature in May: 68.7°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in May: 52.2°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 (13.5°F).
Average pressure in May
Chelsea, 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
Chelsea, IA
- Average wind speed in May: 9.2mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in May
Chelsea, 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 (72%).
Average rainfall in May
Chelsea, 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 January (1.18").
Average rainfall days in May
Chelsea, IA
- Average rainfall days in May: 18.1 days
The month with the highest number of rainy days is June (19.3 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in May
Chelsea, IA
- Average snowfall in May: 0.12"
The month with the highest snowfall is January (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Chelsea, IA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Chelsea, 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: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Chelsea, IA
- Average sunshine days in May: 10.6 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is June (8.4 days).
Average UV index in May
Chelsea, IA
- Average UV index in May: 5
The month with the highest UV index is June (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
Chelsea, IA
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in May
Chelsea, 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).
Chelsea, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location