May weather forecastOshkosh, WI

May
Weather in May
May is when spring is fully underway in Oshkosh. The temperature climbs higher and the weather becomes milder compared to April. The increased temperatures in May, which rise to a high of 62.2°F (16.8°C), mark the approaching summer. The frequency of rainy days decreases and one can enjoy longer hours of daylight. With comfortable temperatures and less frequent downpours, May becomes an ideal month for an array of outdoor excursions.Temperature
As May arrives, Oshkosh's weather shows an increase in high-temperatures, moving from April's cool 50.2°F (10.1°C) to a refreshing 62.2°F (16.8°C). In May, Oshkosh records an average nighttime temperature of 46.4°F (8°C).Humidity
In Oshkosh, Wisconsin, the average relative humidity in May is 79%.Rainfall
May is the month with the most rainfall. Rain falls for 15.3 days and accumulates 3.62" (92mm) of precipitation.Snowfall
In Oshkosh, snow does not fall in May through September.Daylight
The average length of the day in May in Oshkosh is 14h and 47min.On the first day of the month, sunrise is at 5:44 am and sunset at 7:57 pm. On the last day of May, in Oshkosh, sunrise is at 5:14 am and sunset at 8:29 pm CDT.
Sunshine
In May, the average sunshine in Oshkosh is 8.7h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A daily maximum UV index of 5 in May translates into the following instructions:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. 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
Oshkosh, WI
- Average high temperature in May: 62.2°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in May: 46.4°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in May
Oshkosh, WI
- Average pressure in May: 29.96"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Oshkosh, WI
- Average wind speed in May: 9.2mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (7.5mph).
Average humidity in May
Oshkosh, WI
- Average humidity in May: 79%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in May
Oshkosh, WI
- Average rainfall in May: 3.62"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days in May
Oshkosh, WI
- Average rainfall days in May: 15.3 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (3.6 days).
Average snowfall in May
Oshkosh, WI
- Average snowfall in May: 0"
The month with the highest snowfall is January (4.76").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Oshkosh, WI
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (13.8 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
Oshkosh, WI
- Average daylight in May: 14h and 48min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The months with the least sunshine are January and February (Average sunshine: 3h and 24min).
Average sunshine days in May
Oshkosh, WI
- Average sunshine days in May: 13.9 days
The month with the most sunshine days is September (17.2 days).
The month with the least sunshine days is April (11.9 days).
Average UV index in May
Oshkosh, WI
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in May
Oshkosh, WI
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in May
Oshkosh, WI
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, October, November and December (6mi).
The months with the lowest visibility are January, February and September (5mi).





