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's arrival sees a rise in the average high-temperature, jumping from April's mild 59.4°F (15.2°C) to a pleasant 70.3°F (21.3°C). Castana's temperature drops to an average low of 53.2°F (11.8°C) during the nights of May.Humidity
In May, the average relative humidity in Castana is 70%.Rainfall
May is the month with the most rainfall. Rain falls for 16.6 days and accumulates 3.31" (84mm) of precipitation.Snowfall
In Castana, snow does not fall in May through September.Daylight
The average length of the day in May in Castana is 14h and 35min.On the first day of May in Castana, sunrise is at 6:18 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 8:52 pm CDT.
Sunshine
The average sunshine in May is 8.9h.UV index
In May, the average daily maximum UV index in Castana is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum UV index of 5 in May translates into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Frequently asked questions
What is the temperature in May in Castana?
What is the average humidity in May in Castana?
What is the rainiest month in Castana?
How many days does it rain in May in Castana?
When it does not snow in Castana?
Does it snow in Castana in May?
How many hours of daylight does Castana have in May?
When is the sunrise / sunset in May in Castana?
How many hours of sunshine does Castana have in May?
What is the UV index intensity in May in Castana?
Average temperature in May
Castana, IA
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in May: 53.2°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in May
Castana, IA
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in May
Castana, IA
- Average wind speed in May: 9.3mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in May
Castana, IA
- Average humidity in May: 70%
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are April and October (66%).
Average rainfall in May
Castana, IA
- Average rainfall in May: 3.31"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in May
Castana, IA
- Average rainfall days in May: 16.6 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in May
Castana, IA
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.03").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Castana, IA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Castana, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in May
Castana, IA
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (12 days).
Average UV index in May
Castana, IA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in May
Castana, IA
- Average cloud cover in May: 39
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in May
Castana, IA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Castana, Iowa, USA
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