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
A shift in the average high-temperature is noticeable in May, changing from a moderate 58.8°F (14.9°C) in April to an agreeable 69.4°F (20.8°C). Throughout May, the temperature falls to an average low of 52.9°F (11.6°C).Humidity
In Harlan, the average relative humidity in May is 73%.Rainfall
In May, the rain falls for 15.7 days. Throughout May, 2.6" (66mm) of precipitation is accumulated. In Harlan, during the entire year, the rain falls for 113.5 days and collects up to 15.71" (399mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Harlan, Iowa. During 0.3 snowfall days, in May, Harlan aggregates 0.16" (4mm) of snow. In Harlan, during the entire year, snow falls for 31.5 days and aggregates up to 7.13" (181mm) of snow.Daylight
The average length of the day in May in Harlan is 14h and 33min.On the first day of the month, sunrise is at 6:16 am and sunset at 8:19 pm. On the last day of May, sunrise is at 5:49 am and sunset at 8:48 pm CDT.
Sunshine
In Harlan, the average sunshine in May is 8.8h.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 unsafe exposure to UV radiation for ordinary individuals.Note: In May, an average UV index of 5 transforms into the following instructions:
Exercise prevention - Protecting skin and eyes from harm is required. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Harlan?
What is the average humidity in May in Harlan?
How much does it rain in Harlan in May?
What is the last month it snows in Harlan?
How many hours of daylight does Harlan have in May?
When are sunrise and sunset in May in Harlan?
How many hours of sunshine does Harlan have in May?
What is the UV index intensity in May in Harlan?
Average temperature in May
Harlan, IA
- Average high temperature in May: 69.4°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in May: 52.9°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure in May
Harlan, 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 (29.87"Hg).
Average wind speed in May
Harlan, 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 (7.2mph).
Average humidity in May
Harlan, IA
- Average humidity in May: 73%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (68%).
Average rainfall in May
Harlan, IA
- Average rainfall in May: 2.6"
The wettest month (with the highest rainfall) is June (2.64").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in May
Harlan, IA
- Average rainfall days in May: 15.7 days
The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in May
Harlan, IA
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Harlan, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Harlan, 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 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in May
Harlan, IA
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in May
Harlan, 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 January, February, October, November and December (UV index 2).
Average cloud cover in May
Harlan, IA
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in May
Harlan, 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).
Harlan, Iowa, USA
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