May weather forecast
Cortland, NY

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A monument from the civil war stands high in the neat lawns near the iconic courthouse in the Courthouse Park in Cortland, New York
A monument from the civil war stands high in the neat lawns near the iconic courthouse in the Courthouse Park in Cortland, New York

Weather in May

May displays the true magnitude of spring weather in Cortland, with temperatures reaching between 46°F (7.8°C) and 65.7°F (18.7°C). Precipitation peaks at 2.48" (63mm), nourishing the abundant plant life that now swathes the city in green. The residents of Cortland savour the mild and pleasant weather, which is perfect for outdoor activities. Spring has fully matured, and the city is alive with vibrant colours and renewed energy.

Temperature

May's arrival in Cortland signals an increase in average high-temperatures, moving from April's fresh 52.3°F (11.3°C) to an enjoyable 65.7°F (18.7°C). May's nights in Cortland observe an average temperature of 46°F (7.8°C).

Humidity

The months with the lowest humidity are April and May, with an average relative humidity of 80%.

Rainfall

The wettest months are May and July, with an average 2.48" (63mm) of rainfall.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows in Cortland. During 0.6 snowfall days, in May, Cortland aggregates 0.16" (4mm) of snow. Throughout the year, in Cortland, there are 79.7 snowfall days, and 24.06" (611mm) of snow is accumulated.

Daylight

In May, the average length of the day is 14h and 38min.
On the first day of the month, sunrise is at 5:58 am and sunset at 8:05 pm. On the last day of May, in Cortland, sunrise is at 5:29 am and sunset at 8:35 pm EDT.

Sunshine

In Cortland, the average sunshine in May is 8.3h.

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 moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 5 during May translates into the following directions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Frequently asked questions

What is the temperature in May in Cortland?

Cortland in May has an average high-temperature of 65.7°F (18.7°C) and an average low-temperature of 46°F (7.8°C).

What are the least humid months in Cortland?

April and May, with an average relative humidity of 80%, are the least humid months in Cortland, New York.

What is the average humidity in May in Cortland?

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

What is the wettest month in Cortland?

The months with the most rainfall in Cortland, New York, are May and July, with an average 2.48" (63mm) of precipitation.

How much does it rain in Cortland in May?

In May, the rain falls for 17.1 days. Throughout May, 2.48" (63mm) of precipitation is accumulated.

What is the last month it snows in Cortland?

May is the last month it regularly snows in Cortland. During 0.6 snowfall days, in May, Cortland aggregates 0.16" (4mm) of snow.

How many hours of daylight does Cortland have in May?

In May, the average day length in Cortland is 14h and 38min.

When is the sunrise / sunset in May in Cortland?

On the first day of May in Cortland, sunrise is at 5:58 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 5:29 am and sunset at 8:35 pm EDT.

How many hours of sunshine does Cortland have in May?

In May, the average sunshine duration in Cortland, New York, is 8.3h.

What is the month with the highest UV index in Cortland?

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

What is the UV index reading in May in Cortland?

The average daily maximum UV index in May in Cortland is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Cortland, NY

Average temperature in May - Cortland, NY
  • Average high temperature in May: 65.7°F

The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in May: 46°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).

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Average pressure in May
Cortland, NY

Average pressure in May - Cortland, NY
  • Average pressure in May: 29.99"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Cortland, NY

Average wind speed in May - Cortland, NY
  • Average wind speed in May: 7.7mph

The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

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Average humidity in May
Cortland, NY

Average humidity in May - Cortland, NY
  • Average humidity in May: 80%

The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and May (80%).

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Average rainfall in May
Cortland, NY

Average rainfall in May - Cortland, NY
  • Average rainfall in May: 2.48"

The wettest months (with the highest rainfall) are May and July (2.48").
The driest month (with the least rainfall) is November (1.34").

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Average rainfall days in May
Cortland, NY

Average rainfall days in May - Cortland, NY
  • Average rainfall days in May: 17.1 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (5.7 days).

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Average snowfall in May
Cortland, NY

Average snowfall in May - Cortland, NY
  • Average snowfall in May: 0.16"

The month with the highest snowfall is February (5.75").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Cortland, NY

Average snowfall days in May - Cortland, NY
  • Average snowfall days in May: 0.6 days

The month with the highest number of snowfall days is January (18.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Cortland, NY

Average daylight in May / Average sunshine in May - Cortland, NY
  • Average daylight in May: 14h and 4min

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 6min).

  • Average sunshine in May: 8h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 2h and 24min).

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Average sunshine days in May
Cortland, NY

Average sunshine days in May - Cortland, NY
  • Average sunshine days in May: 11.3 days

The month with the most sunshine days is September (15.8 days).
The month with the least sunshine days is February (7.7 days).

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Average UV index in May
Cortland, NY

Average UV index in May - Cortland, NY
  • 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 and December (UV index 1).

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Average cloud cover in May
Cortland, NY

Average cloud cover in May - Cortland, NY
  • Average cloud cover in May: 48

The months with the most cloud cover are January and February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 36).

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Average visibility in May
Cortland, NY

Average visibility in May - Cortland, NY
  • Average visibility in May: 5mi

The month with the highest visibility is April (6mi).
The month with the lowest visibility is February (4mi).

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Cortland, New York, USA

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