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
May's onset is marked by a clear temperature increase, soaring from a cool 50.4°F (10.2°C) in April to an enjoyable 64.8°F (18.2°C). In the month of May, the nighttime temperature dips to a steady average of 46°F (7.8°C).Humidity
The average relative humidity in May is 78%.Rainfall
In May, the rain falls for 16.5 days. Throughout May, 2.64" (67mm) of precipitation is accumulated. In Helena, during the entire year, the rain falls for 160.1 days and collects up to 29.76" (756mm) of precipitation.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, Helena aggregates 0.12" (3mm) of snow. Throughout the year, there are 70.6 snowfall days, and 36.02" (915mm) of snow is accumulated.Daylight
In Helena, New York, the average length of the day in May is 14h and 52min.On the first day of the month, sunrise is at 5:47 am and sunset at 8:04 pm. On the last day of May, sunrise is at 5:15 am and sunset at 8:37 pm EDT.
Sunshine
In May, the average sunshine is 8.4h.UV index
The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high UV index of 4 in May translates into the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Helena in May?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How long on average sun shines in May in Helena?
What is the UV index intensity in May?
Average temperature in May
Helena, NY
- Average high temperature in May: 64.8°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (23°F).
- Average low temperature in May: 46°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in May
Helena, NY
- Average pressure in May: 29.97"Hg
The months with the highest atmospheric pressure are March and November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Helena, NY
- Average wind speed in May: 7.5mph
The windiest month (with the highest average wind speed) is February (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in May
Helena, NY
- Average humidity in May: 78%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is April (77%).
Average rainfall in May
Helena, NY
- Average rainfall in May: 2.64"
The wettest month (with the highest rainfall) is August (3.23").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in May
Helena, NY
- Average rainfall days in May: 16.5 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in May
Helena, NY
- Average snowfall in May: 0.12"
The month with the highest snowfall is January (9.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Helena, NY
- Average snowfall days in May: 0.5 days
The month with the highest number of snowfall days is February (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Helena, 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 48min).
- 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 42min).
Average sunshine days in May
Helena, NY
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is November (16 days).
The month with the least sunshine days is July (9.1 days).
Average UV index in May
Helena, NY
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Helena, NY
- Average cloud cover in May: 45
The month with the most cloud cover is February (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in May
Helena, NY
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Helena, New York, USA
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