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
As May sets, the average high-temperature shows an increase, moving up from a fresh 54.9°F (12.7°C) in April to a refreshing 66.9°F (19.4°C). An average low-temperature of 50.5°F (10.3°C) is observed in Rockford, Iowa, during the May nights.Humidity
In May, the average relative humidity is 75%.Rainfall
In Rockford, in May, it is raining for 16.7 days, with typically 3.35" (85mm) of accumulated precipitation. In Rockford, during the entire year, the rain falls for 129.5 days and collects up to 25.98" (660mm) of precipitation.Snowfall
Months with snowfall in Rockford, Iowa, are January through May, October through December. May is the last month it regularly snows in Rockford. During 0.3 snowfall days, in May, Rockford aggregates 0.39" (10mm) of snow. Throughout the year, in Rockford, there are 50.1 snowfall days, and 21.69" (551mm) of snow is accumulated.Daylight
In May, the average length of the day in Rockford is 14h and 41min.On the first day of May, sunrise is at 6:04 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:35 am and sunset at 8:44 pm CDT.
Sunshine
The average sunshine in May is 8.4h.UV index
The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: In May, a regular UV index of 5 translates into these guidelines:
Undertake precautions - Guarding against sun damage is counselled. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Frequently asked questions
What are the temperatures in Rockford in May?
What is the average humidity in May in Rockford?
How many days does it rain in May in Rockford?
What is the last month it snows in Rockford?
How many hours of daylight does Rockford have in May?
When is the sunrise / sunset in May in Rockford?
How many hours of sunshine does Rockford have in May?
How high is the UV index in May in Rockford?
Average temperature in May
Rockford, IA
- Average high temperature in May: 66.9°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in May: 50.5°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (10°F).
Average pressure in May
Rockford, IA
- Average pressure in May: 29.93"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in May
Rockford, IA
- Average wind speed in May: 9.3mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in May
Rockford, IA
- Average humidity in May: 75%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Rockford, IA
- Average rainfall in May: 3.35"
The wettest month (with the highest rainfall) is June (3.98").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in May
Rockford, IA
- Average rainfall days in May: 16.7 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3 days).
Average snowfall in May
Rockford, IA
- Average snowfall in May: 0.39"
The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Rockford, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Rockford, IA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 2min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in May
Rockford, IA
- Average sunshine days in May: 12.7 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in May
Rockford, IA
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Rockford, IA
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in May
Rockford, 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).
Rockford, Iowa, USA
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