May weather forecastFairfield, IA
May
Weather in May
May brings on the early summer vibes in Fairfield, with increasing temperatures and abundant daylight hours of 14.5 hours. Interestingly, this month showcases the most rainfall in the year, accumulating to 4.45" (113mm), thereby beautifying the city's green landscapes. A drop in wind speed signifies calmer breezy sources and cozy warmth, perfect for outdoor grills and picnics. The city starts basking under brighter sunshine hours, providing a pleasant ambiance. The culmination of May manifests the introduction of summer's true essence, leading to June's peak heat.Temperature
The shift into May is accompanied by a temperature increase, with the average high-temperature rising from a moderate 60.4°F (15.8°C) in April to an agreeable 70.3°F (21.3°C). During the nights in May, the temperature in Fairfield averages to a cool 53.6°F (12°C).Humidity
In May, the average relative humidity in Fairfield, Iowa, is 80%.Rainfall
The month with the most rainfall is May, when the rain falls for 17.4 days and typically aggregates up to 4.45" (113mm) of precipitation.Snowfall
In Fairfield, snow does not fall in May through September.Daylight
The average length of the day in May in Fairfield is 14h and 30min.On the first day of May, sunrise is at 6:04 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 5:37 am and sunset at 8:33 pm CDT.
Sunshine
In May, the average sunshine in Fairfield is 8.5h.UV index
The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 5 during May morphs into the following directions:
Be vigilant - A duty to shield skin and eyes from injury exists. To guard against the harmful effects of the Sun, minimize exposure during midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Fairfield, IA
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in May: 53.6°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in May
Fairfield, IA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Fairfield, IA
- Average wind speed in May: 8.9mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in May
Fairfield, IA
- Average humidity in May: 80%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Fairfield, IA
- Average rainfall in May: 4.45"
The wettest month (with the highest rainfall) is May (4.45").
The driest months (with the least rainfall) are January and December (1.18").
Average rainfall days in May
Fairfield, IA
- Average rainfall days in May: 17.4 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in May
Fairfield, IA
- Average snowfall in May: 0"
The months with the highest snowfall are January and February (4.33").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Fairfield, IA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (10.3 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
Fairfield, IA
- Average daylight in May: 14h and 30min
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 30min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Fairfield, IA
- Average sunshine days in May: 11 days
The months with the most sunshine days are October and November (18.8 days).
The month with the least sunshine days is May (11 days).
Average UV index in May
Fairfield, IA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Fairfield, IA
- Average cloud cover in May: 42
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 30).
Average visibility in May
Fairfield, 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).
