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
As May arrives, a noticeable rise in the average high-temperature is witnessed, moving from a fresh 50.4°F (10.2°C) in April to a comfortable 65.3°F (18.5°C). In the month of May, Lewis's average low-temperature falls to a frosty 44.4°F (6.9°C).Humidity
The least humid month is May, with an average relative humidity of 75%.Rainfall
In Lewis, in May, it is raining for 17.1 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, there are 176.9 rainfall days, and 28.27" (718mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.5 snowfall days, in May, Lewis aggregates 0.24" (6mm) of snow. In Lewis, during the entire year, snow falls for 85.1 days and aggregates up to 43.03" (1093mm) of snow.Daylight
In May, the average length of the day is 14h and 48min.On the first day of May, sunrise is at 5:43 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 5:13 am and sunset at 8:30 pm EDT.
Sunshine
In Lewis, the average sunshine in May 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 of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In May, the maximum UV index of 5 transforms into these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Experience reduced UV exposure by about half when donning a wide-brim hat. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the least humid month in Lewis?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
How many hours of daylight does Lewis have in May?
When are sunrise and sunset in May?
How many hours of sunshine does Lewis have in May?
What are the months with the highest UV index?
What is the UV index reading in May?
Average temperature in May
Lewis, NY
- Average high temperature in May: 65.3°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (24.8°F).
- Average low temperature in May: 44.4°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).
Average pressure in May
Lewis, NY
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Lewis, NY
- Average wind speed in May: 6.2mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in May
Lewis, NY
- Average humidity in May: 75%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is May (75%).
Average rainfall in May
Lewis, NY
- Average rainfall in May: 2.64"
The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in May
Lewis, NY
- Average rainfall days in May: 17.1 days
The month with the highest number of rainy days is July (18.6 days).
The month with the least rainy days is February (10.4 days).
Average snowfall in May
Lewis, NY
- Average snowfall in May: 0.24"
The month with the highest snowfall is February (12.05").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Lewis, NY
- Average snowfall days in May: 0.5 days
The month with the highest number of snowfall days is January (19.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Lewis, NY
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in May
Lewis, NY
- Average sunshine days in May: 12.4 days
The month with the most sunshine days is September (16.7 days).
The month with the least sunshine days is February (7.6 days).
Average UV index in May
Lewis, 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 and December (UV index 1).
Average cloud cover in May
Lewis, NY
- Average cloud cover in May: 44
The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in May
Lewis, NY
- Average visibility in May: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Lewis, New York, USA
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