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
An upsurge in temperatures occurs as April gives way to May, with average highs shifting from a refreshing 59.5°F (15.3°C) to an agreeable 70.2°F (21.2°C). May's average low-temperature reading settles at a fresh 53.8°F (12.1°C).Humidity
In Washington, the average relative humidity in May is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 17 days and typically aggregates up to 2.91" (74mm) of precipitation.Snowfall
May through September are months without snowfall in Washington, Iowa.Daylight
In Washington, the average length of the day in May is 14h and 31min.On the first day of May in Washington, sunrise is at 6:02 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 5:35 am and sunset at 8:33 pm CDT.
Sunshine
In Washington, the average sunshine in May is 8.9h.UV index
The average daily maximum UV index in May in Washington is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 5 in May translates into these instructions:
Heed the precautions - It is counselled to guard against solar damage. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Washington?
What is the average humidity in May in Washington?
What is the wettest month in Washington?
How much does it rain in Washington in May?
When it does not snow in Washington?
Does it snow in Washington in May?
How many hours of daylight does Washington have in May?
What time are sunrise and sunset in May in Washington?
How long on average sun shines in May in Washington?
What is the UV index reading in May in Washington?
Average temperature in May
Washington, IA
- Average high temperature in May: 70.2°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in May: 53.8°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in May
Washington, 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 (29.9"Hg).
Average wind speed in May
Washington, IA
- Average wind speed in May: 8.9mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in May
Washington, IA
- Average humidity in May: 79%
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Washington, IA
- Average rainfall in May: 2.91"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is December (0.71").
Average rainfall days in May
Washington, IA
- Average rainfall days in May: 17 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in May
Washington, IA
- Average snowfall in May: 0"
The month with the highest snowfall is January (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Washington, IA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Washington, IA
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in May
Washington, IA
- Average sunshine days in May: 10.9 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in May
Washington, IA
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Washington, IA
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in May
Washington, IA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Washington, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location