May weather forecastSeneca, WI

May

Weather in May

The last month of the spring, May, is a refreshing month in Seneca, Wisconsin, with an average temperature fluctuating between 48.4°F (9.1°C) and 66.6°F (19.2°C).

Temperature

The arrival of May signals an increase in the average high-temperature, moving from a fresh 54.1°F (12.3°C) in April to an enjoyable 66.6°F (19.2°C). An average nighttime temperature of 48.4°F (9.1°C) is witnessed throughout May.

Humidity

In Seneca, Wisconsin, the average relative humidity in May is 80%.

Rainfall

In Seneca, in May, during 19.2 rainfall days, 3.58" (91mm) of precipitation is typically accumulated. In Seneca, during the entire year, the rain falls for 142.4 days and collects up to 28.66" (728mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In May, the average length of the day is 14h and 42min.
On the first day of May, sunrise is at 5:55 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 5:26 am and sunset at 8:36 pm CDT.

Sunshine

In May, the average sunshine is 8.2h.

UV index

May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In May, the maximum UV index of 5 suggests this advice:
Exercise prevention - Precautions against solar damage are endorsed. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.

Updated: Jun 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

During May, Seneca experiences an average high-temperature of 66.6°F (19.2°C) and a low-temperature of 48.4°F (9.1°C).

In May, the average relative humidity is 80%.

In Seneca, during May, the rain falls for 19.2 days and regularly aggregates up to 3.58" (91mm) of precipitation.

In Seneca, snow does not fall in May through September.

In May, it doesn't snow. April is the latest month when it typically snows.

The average day length in May is 14h and 42min.

On the first day of May in Seneca, sunrise is at 5:55 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 5:26 am and sunset at 8:36 pm CDT.

In Seneca, the average sunshine duration in May is 8.2h.

The months with the highest UV index in Seneca are May through August, with an average maximum UV index of 5.

In Seneca, Wisconsin, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

54.1°F

66.6°F

76.1°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.3mph

8.7mph

7.8mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

10.8

9.7

9.2

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Seneca, WI

Average high temperature in May: 66.6°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (23.4°F).

Average low temperature in May: 48.4°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).

Average pressure in May
Seneca, WI

Average pressure in May: 29.95"Hg

The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in May
Seneca, WI

Average wind speed in May: 8.1mph

The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

Average humidity in May
Seneca, WI

Average humidity in May: 80%

The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April and October (77%).

Average rainfall in May
Seneca, WI

Average rainfall in May: 3.58"

The wettest month (with the highest rainfall) is June (4.17").
The driest month (with the least rainfall) is January (1.14").

Average rainfall days in May
Seneca, WI

Average rainfall days in May: 19.2 days

The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is February (4.3 days).

Average snowfall in May
Seneca, WI

Average snowfall in May: 0"

The month with the highest snowfall is February (5.98").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
Seneca, WI

Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (15.7 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
Seneca, WI

Average daylight in May: 14h and 42min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).

Average sunshine in May: 8h and 12min

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

Average sunshine days in May
Seneca, WI

Average sunshine days in May: 9.7 days

The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is June (9.2 days).

Average UV index in May
Seneca, 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, November and December (UV index 1).