Weathermondo.com
United StatesThe weather in May in Lewiston
It's pleasantly warm in May in Lewiston with an average temperature of 19°C. Temperatures this month range from a low of 14°C to a high of 25°C. At night, you can expect temperatures between 5°C and 15°C.
Looking for great weather? May is a good time to be in Lewiston. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May for Lewiston, New York. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 32°C in 2018, Lewiston reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 5°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of -2°C to a highest value of 23°C.
Rainfall amount
In May, there is an average of 95 mm of precipitation, spread over 12 days. The wind speed is around 4 Bft, mostly coming from the South.
Daily weather in May for Lewiston
Click on any day in May to get detailed info about the usual weather on that day in Lewiston. Check out the historical temperatures and precipitation over the past 10 years on this day.
May weather comparison
| Lewiston | New York | |
|---|---|---|
| Average temperature | 19°C | 22°C |
| Max. temperature | 25°C | 28°C |
| Min. temperature | 5°C | -5°C |
| Total precipitation | 95 mm | 105 mm |
| Rainy days | 12 days | 14 days |
Start of May
The month of May starts in Lewiston with cool temps, averaging around 16°C during the day and nights around 8°C.
Mid May
By mid-May, daytime temps rise to around 19°C, with nights around 10°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of May
By the end of May, the average daytime temperature in Lewiston is around 23°C, while nighttime temps are about 14°C. A shower might pop up, but overall, the weather will be dry and sunny.
Find affordable trips to Lewiston
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Check out the climate of Lewiston for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in May in Lewiston, New York. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in May in Lewiston
Temperature in May in Lewiston over the years
Precipitation charts
These charts show the average amount of precipitation in May in Lewiston, New York. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in May in Lewiston
Total precipitation in May in Lewiston over the years
Daily UV index in May in Lewiston
This chart shows the average daily UV index in May in Lewiston, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in May in Lewiston
Have you been to Lewiston in May?
Share your weather experience in May in Lewiston.
Average weather in Lewiston by month
Click on a month below to see detailed weather info for Lewiston. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.