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 Dewar, Iowa, enters May, the average high-temperature increases from the a moderate 56.8°F (13.8°C) of April to a pleasant 68.2°F (20.1°C). In Dewar, an average nighttime temperature of 51.6°F (10.9°C) is expected during May.Humidity
The average relative humidity in May is 77%.Rainfall
In Dewar, in May, during 17.1 rainfall days, 4.21" (107mm) of precipitation is typically accumulated. In Dewar, during the entire year, the rain falls for 133.6 days and collects up to 28.27" (718mm) of precipitation.Snowfall
Months with snowfall in Dewar, Iowa, are January through May, October through December. May is the last month it regularly snows in Dewar. During 0.3 snowfall days, in May, Dewar aggregates 0.2" (5mm) of snow. Throughout the year, in Dewar, there are 41.6 snowfall days, and 15.24" (387mm) of snow is accumulated.Daylight
In Dewar, the average length of the day in May is 14h and 38min.On the first day of the month, sunrise is at 6:02 am and sunset at 8:09 pm. On the last day of May, sunrise is at 5:34 am and sunset at 8:39 pm CDT.
Sunshine
In Dewar, the average sunshine in May is 8.4h.UV index
In Dewar, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 5 in May, converts into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
What are May temperatures in Dewar?
What is the average humidity in May in Dewar?
How much does it rain in Dewar in May?
What is the last month it snows in Dewar?
What is the average length of the day in May in Dewar?
When is the sunrise / sunset in May in Dewar?
How long on average sun shines in May in Dewar?
What is the UV index reading in May in Dewar?
Average temperature in May
Dewar, IA
- Average high temperature in May: 68.2°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 (24.3°F).
- Average low temperature in May: 51.6°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in May
Dewar, 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
Dewar, IA
- Average wind speed in May: 9.3mph
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
Dewar, IA
- Average humidity in May: 77%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Dewar, IA
- Average rainfall in May: 4.21"
The wettest month (with the highest rainfall) is June (4.29").
The driest months (with the least rainfall) are January and February (1.02").
Average rainfall days in May
Dewar, IA
- Average rainfall days in May: 17.1 days
The month with the highest number of rainy days is June (18.1 days).
The month with the least rainy days is February (4 days).
Average snowfall in May
Dewar, IA
- Average snowfall in May: 0.2"
The month with the highest snowfall is January (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Dewar, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Dewar, 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 month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in May
Dewar, IA
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is October (17.8 days).
The month with the least sunshine days is June (10 days).
Average UV index in May
Dewar, 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
Dewar, IA
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in May
Dewar, IA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Dewar, Iowa, USA
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