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
May
Weather in May
Temperature
May's arrival coincides with a rise in the average high-temperature, moving from April's fresh 50.4°F (10.2°C) to a comfortable 63.1°F (17.3°C). During the month of May, Lewiston anticipates a mean low-temperature of 48.7°F (9.3°C).Humidity
The average relative humidity in May in Lewiston, New York, is 77%.Rainfall
In Lewiston, during May, the rain falls for 17.6 days and regularly aggregates up to 2.95" (75mm) of precipitation. In Lewiston, during the entire year, the rain falls for 169.3 days and collects up to 30.31" (770mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Lewiston aggregates 0.24" (6mm) of snow. In Lewiston, during the entire year, snow falls for 65.6 days and aggregates up to 22.6" (574mm) of snow.Daylight
In Lewiston, the average length of the day in May is 14h and 41min.On the first day of May in Lewiston, sunrise is at 6:08 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:48 pm EDT.
Sunshine
In Lewiston, New York, the average sunshine in May is 9.1h.UV index
In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 5 during May translates into these guidelines:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Lewiston?
What is the average humidity in May in Lewiston?
How many days does it rain in May in Lewiston?
What is the last month it snows in Lewiston?
How many hours of daylight does Lewiston have in May?
What time are sunrise and sunset in May in Lewiston?
How long on average sun shines in May in Lewiston?
How high is the UV index in May in Lewiston?
Average temperature in May
Lewiston, NY
- Average high temperature in May: 63.1°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in May: 48.7°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in May
Lewiston, NY
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Lewiston, NY
- Average wind speed in May: 8.1mph
The windiest month (with the highest average wind speed) is January (12.3mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in May
Lewiston, NY
- Average humidity in May: 77%
The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are August and September (74%).
Average rainfall in May
Lewiston, NY
- Average rainfall in May: 2.95"
The wettest month (with the highest rainfall) is July (3.11").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in May
Lewiston, NY
- Average rainfall days in May: 17.6 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in May
Lewiston, NY
- Average snowfall in May: 0.24"
The month with the highest snowfall is February (7.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Lewiston, NY
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (16.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Lewiston, 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: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in May
Lewiston, NY
- Average sunshine days in May: 12.4 days
The month with the most sunshine days is September (14 days).
The month with the least sunshine days is January (6.8 days).
Average UV index in May
Lewiston, NY
- Average UV index in May: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Lewiston, NY
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in May
Lewiston, NY
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).